Project

General

Profile

Kaon LT Meetings » History » Version 220

Richard Trotta, 08/04/2021 04:24 PM

1 116 Richard Trotta
{{>TOC}}
2 1 Richard Trotta
3
h1. *Kaon LT Meetings*
4
5 96 Stephen Kay
Kaon LT collaboration analysis meetings. Please add your talk to the meeting ahead of time. Add the newest meeting to the top of the list!
6
7 95 Stephen Kay
----
8 113 Richard Trotta
9 1 Richard Trotta
h2. 2021 Meetings
10 200 Richard Trotta
11 220 Richard Trotta
h3. August 4, 2021
12
13
* Richard
14
** Update on the HEEP singles. The remainder of energy setting ratios vs SIMC were looked at over the range of angles. They look good (within 1% and < 0.5% uncertainty).
15
** Issues with the COIN are seen but may be a replay issue.
16
17
Next meeting August X @ 4:30 ED
18
19
----
20
21 217 Richard Trotta
h3. July 21, 2021
22
23 218 Richard Trotta
* "Richard":https://redmine.jlab.org/attachments/download/1250/KaonLTMeeting7_14_21.pdf
24 217 Richard Trotta
** Update on the HEEP singles. 10.6 GeV ratios vs SIMC were looked at over the range of angles. They look good (within 1%) but proper error bars are needed.
25
26 218 Richard Trotta
Next meeting August 4th @ 4:30 ED
27 217 Richard Trotta
28
----
29
30 215 Richard Trotta
h3. May 12, 2021
31
32
* Richard
33
** The currents were adjusted from 1-10 uA with little effect on the EDMTLT but proper changes to the CPULT. The replay bcm cut script developed by Sanghwa was also analyzed to see if it may be causing the issue but it had the same effects. There was also a small error in the code found where T.coin.pEDTM.tdcTimeRaw was incorrectly written as T.coin.pEDTM.tdcTime.
34
35 216 Richard Trotta
Next meeting May 26th @ 4:30 ED
36 215 Richard Trotta
37
----
38
39 213 Richard Trotta
h3. April 28, 2021
40
41
* Richard
42 214 Richard Trotta
** Lumi table was created for 2 sets of runs. Odd behavior seen ~30-45 uA with EDTM where is drops. Playing with the current cuts is the next step.
43 213 Richard Trotta
44
Next meeting May 12th @ 4:30 EDT
45
46
----
47
48 211 Richard Trotta
h3. April 14, 2021
49 212 Richard Trotta
50 211 Richard Trotta
* "Richard":https://redmine.jlab.org/attachments/download/1197/KaonLTMeeting_4_14_21.pdf
51
** Updated Lumi carbon plots with uncertainties. PID and current cuts need to be played around with a bit to see if they improve things (as uncertainties don't explain any boiling-type behaviors). 
52
** Some PionLT carbon runs were looked at but there are still some issues (either cut or pathing related).
53
54
Next meeting April 14th @ 4:30 EDT
55
56
----
57
58 203 Richard Trotta
h3. March 31, 2021
59
60 206 Richard Trotta
* Richard
61 209 Richard Trotta
** Luminosity studies
62
*** PionLT carbon runs
63
**** Still having issues getting decent results. I think I am just missing a definition somewhere that I need to track down
64
*** Uncertainties
65
**** Easy to do, I just need to put it into my script
66
** Explicit PS calculations
67
*** I have gotten a rough script working for very simple runs (ie low rate, single spectrometer, calibration runs)
68
*** I am trying to expand to lumi singles runs, things get a bit more complex so I am just working out the trigger correlations
69
** Pass 2 runs
70
*** DEF-files
71
**** I checked out the DEF-files for our combination of the nested files
72
**** There are a lot a files (~150!!!!) and may be hard to track so next week *we should make a flowchart together*
73
**** Working on my list of branches for the next replay
74
***** Mainly just working on my list of branches for the explicit PS calculations
75
***** *Everyone should have a list of these branches by next mini-meeting (4/7/21)*
76 210 Stephen Kay
* Stephen
77
** Updated DEF-File for the "full" replay
78
*** Can't remove NData brances, Mark says they won't take up too many resources anyway
79
*** Removed individual PMT info and raw info for many detectors, reduced file size by factor ~2
80
** Updating DEF-files/scripts for calibrations as part of PionLT prep
81
** Will focus on DEF-file/DEF-cut file updates over next week
82
*** Will investigate HeeP replays over rest of this week.
83 207 Richard Trotta
84
85 203 Richard Trotta
86
Next meeting April 14th @ 4:30 EDT
87
88
----
89
90 201 Stephen Kay
h3. March 24, 2021
91
92
* KaonLT Mini Meeting focusing on Pass2 preparation
93
* "Task summary from Richard":https://redmine.jlab.org/projects/kltexp/wiki/Replay_2_Tasks
94
95 202 Stephen Kay
Next meeting March 31st @ 4:30 EDT
96 201 Stephen Kay
97
----
98
99 200 Richard Trotta
h3. March 17, 2021
100
101
* "Richard":https://redmine.jlab.org/attachments/download/1197/KaonLTMeeting_3_17_21.pdf
102 1 Richard Trotta
** I have re-run the carbon lumi runs with the changes to the replay events (i.e. All_events_NO_EDTM). The results look pretty good (within a few percent). There are still some trends I need to investigate for certain runs and I need to do the analysis for the pionLT carbon lumi data.
103 202 Stephen Kay
* Mini meeting March 24th @ 4:30 EDT
104 201 Stephen Kay
105
Next meeting March 31st @ 4:30 EDT
106 200 Richard Trotta
107
----
108 194 Richard Trotta
109 199 Richard Trotta
h3. March 3, 2021
110
111
* "Richard":https://redmine.jlab.org/attachments/download/1197/KaonLTMeeting_3_3_21.pdf
112
** I found an issue with the replay scripts used where the EDTM was not being properly registered. There is a discrepancy between two replay scripts depending on what the Decode_master is set to (i.e. ALL_events vs ALL_events_NO_EDTM). 
113
** The explicit calculation of the prescale has hit a snag because of the differences between 6 GeV and 12 GeV. I contacted Mark Jones, who explained there are significant differences in the ADC gate between the two eras (which my own findings confirmed). I have contacted Brad for further input.
114
115
Next meeting March 17th @ 4:30 EST
116
117
----
118
119
120 196 Richard Trotta
h3. February 17, 2021
121 194 Richard Trotta
122
* Richard
123
** Tried to remove some cumbersome elements to the analysis scripts without success. A few runs were added to a well behaved set of lumi runs with good consistency.
124
125 198 Nathan Heinrich
* Nathan
126
** Presented an update on the Hodoscope Calibrations: https://redmine.jlab.org/attachments/download/1196/HodoscopeUpdate_2021Feb17.pdf
127
128 194 Richard Trotta
Next meeting March 3rd @ 4:30 EST
129
130
----
131
132 196 Richard Trotta
h3. February 3, 2021
133 193 Richard Trotta
134
* Richard
135
** A table with the aerogel efficiency for kaons is being created. It will be expanded to other particles and detectors.
136
137
Next meeting February 17th @ 4:30 EST
138
139
----
140
141 196 Richard Trotta
h3. January 20, 2021
142 191 Richard Trotta
143
* "Richard":https://redmine.jlab.org/attachments/download/1172/KaonLTMeeting_1_20_21.pdf
144
** All KaonLT carbon runs have been analyzed. There are still some issues that seem to be related to the pre-scale values. I may need to investigate the EDTM and/or the COIN events further to correct for these.
145
146 1 Richard Trotta
147 191 Richard Trotta
Next meeting February 3rd @ 4:30 EST
148
149
----
150
151 196 Richard Trotta
h3. January 6, 2021
152 190 Richard Trotta
153
* "Richard":https://redmine.jlab.org/attachments/download/1153/KaonLTMeeting1_6_21.pdf
154 186 Richard Trotta
** Analyzed most of the luminosity scans. There are a few issues I am investigating still which seem to be run related.
155
* Vijay
156
** 
157 1 Richard Trotta
158 191 Richard Trotta
Next meeting January 20th @ 4:30 EST
159 186 Richard Trotta
160
161
----
162
163
h2. 2020 Meetings
164
165 185 Richard Trotta
h3. December 2, 2020
166
 
167
* Carlos
168
** 
169
* Ali and Richard
170
** Richard included the EDTM to Lumi analysis and found some old analysis of scalers by Mark Jones that he will compare. Ali and Richard met last week and will begin combining Ali's tracking studies with Richard's lumi analysis.
171
* Stephen
172
** 
173
* Vijay
174
** 
175
176
Next meeting December 16th @ 4:30 EST
177
178
----
179
180 180 Richard Trotta
h3. November 18, 2020
181
182
* Ali
183
** 
184 183 Richard Trotta
* "Carlos":https://redmine.jlab.org/attachments/download/1103/LiveTime_Study_cyero.pdf
185 181 Richard Trotta
** He is investigating some of the EDTM rate dependence and sees a discrepancy between the total EDTM LT and CPU LT with a sudden dip at 20-30 kHz. More luminosity runs will need to be studied for a full conclusion.
186 180 Richard Trotta
* "Richard":https://redmine.jlab.org/attachments/download/1101/KaonLTMeeting11_18_20.pdf
187
** Scaler analysis matches Carlos' code now. Overall significant improvements were made through some cut adjustments and incorrect variable definitions.
188
* Stephen
189 182 Richard Trotta
** Updated the hallc_replay_lt with parameter files for all coin peaks.
190 180 Richard Trotta
* Vijay
191
** 
192
193 184 Richard Trotta
Next meeting December 2nd @ 4:30 EST
194 180 Richard Trotta
195
----
196
197 178 Richard Trotta
h3. November 4, 2020
198
199
* Ali
200
** 
201
* "Richard":https://redmine.jlab.org/attachments/download/1092/KaonLTMeeting11_4_20.pdf
202 179 Richard Trotta
** Scaler analysis is getting closer to an answer. An in-depth comparison of Carlos and Richard's analysis shows inconsistencies between the two.
203 178 Richard Trotta
* Stephen
204
** 
205
* Vijay
206
** 
207
208
Next meeting November 18th @ 4:30 EST
209
210
211 141 Stephen Kay
----
212
213 170 Richard Trotta
h3. October 28, 2020
214
215
* Ali
216 177 Richard Trotta
** Went over some of his tracking procedures for the report file implementation
217 172 Richard Trotta
* "Richard":https://redmine.jlab.org/attachments/download/1091/KaonLTMeeting10_28_20.pdf
218 173 Richard Trotta
** Luminosity analysis continues. There are still some issues but things have improved a bit.
219 171 Stephen Kay
* "Stephen":https://redmine.jlab.org/attachments/download/1090/KaonLT_Meeting_28_10_20.pdf
220
** Discussion of CT peak analysis, progress and outline of what's left to do with this
221 174 Richard Trotta
* Vijay
222 176 Richard Trotta
** Dry run for Mark's hallc meeting tomorrow (10/29)
223 170 Richard Trotta
224 177 Richard Trotta
Next meeting November 4th @ 4:30 EST
225 170 Richard Trotta
226
----
227
228 164 Richard Trotta
h3. October 14, 2020
229
230 168 Richard Trotta
* Ali
231 164 Richard Trotta
** Working through the REPORT_FILES template to get everything working and outputting proper information.
232
* "Richard":https://redmine.jlab.org/attachments/download/1085/KaonLTMeeting_10_14_20.pdf
233
** Updates on lumi scans. There are many issues from Scalers to Tracking that need to be resolved.
234 167 Richard Trotta
* Stephen
235 164 Richard Trotta
** He has included a demo for using the python analysis script in the README.
236 1 Richard Trotta
237 170 Richard Trotta
Next meeting October 28th @ 4:30 EST
238 164 Richard Trotta
239
----
240
241 161 Richard Trotta
h3. September 23, 2020
242
243
* "Richard":https://redmine.jlab.org/attachments/download/1078/KaonLTMeeting_9_23_20.pdf
244
** A quick lumi analysis after the Pass1 runs. The results were compared to previously analyzed runs (5154-5158). There was some change but nothing huge. Some other runs with the same energy settings were analyzed as well. 
245
* Stephen
246 162 Richard Trotta
** Showed some slides from u-channel meeting of omega and proton MM  plots. Then discussed some ideas for dealing with the hole in the HGCer.
247
* Petr
248
** Data fitting algorithm based on E.H. Bellamy paper. Extracts PMT spectra from ROOT file and makes a 1D projection histogram.
249 161 Richard Trotta
250 163 Richard Trotta
Next meeting October 14th @ 4:30 EST
251 161 Richard Trotta
252
----
253
254 149 Richard Trotta
h3. September 9, 2020
255 156 Richard Trotta
256
* Richard
257 157 Richard Trotta
** Still working on run list, GUI checks
258 156 Richard Trotta
* "Stephen":https://redmine.jlab.org/issues/567
259
** New slim replay scripts and full replay scripts updated
260
* Ali
261
** Him and Stephen found an issue (already aware of) with zeros in the parameter files using Mark's hcana changes
262
** Need to be vigilant of crashed replays because this is probably the issue
263 158 Richard Trotta
* Vijay
264 156 Richard Trotta
** Nearly finished with HGcer calibrations
265 1 Richard Trotta
266 161 Richard Trotta
Next meeting September 23rd @ 4:30 EST
267 156 Richard Trotta
268
----
269
270
h3. August 26, 2020
271
272 149 Richard Trotta
*Links to talks->* "Ali":https://redmine.jlab.org/issues/483 "Vijay":https://redmine.jlab.org/issues/479
273 154 Richard Trotta
274
* Richard
275
** New tasks were created based on the previous discussions on objectives going forward. In the process of checking run sheets against the run list and camera/EPICS.
276
* Stephen
277
** Updated on RF times. There were a few issues with some runs, but overall most are finished.
278
* Ali
279
** Hodoscope calibrations look similar to before. There is still the issue of the double bands in the time walk. This is ok because of the wide windows we still have. (See "hodoscope calibration section":https://redmine.jlab.org/projects/kltexp/wiki/Analysis_Tasks#Calibrations-Mid-to-Late-August-2020)
280
* Vijay
281 150 Richard Trotta
** Updated the SHMS HGCher analysis. The calibrations are coming along, but a little more work needs to be finished up.
282 1 Richard Trotta
283 156 Richard Trotta
Next meeting September 9 @ 5 EST
284 150 Richard Trotta
285 149 Richard Trotta
----
286
287 144 Richard Trotta
h3. July 29, 2020
288 147 Stephen Kay
289 148 Richard Trotta
*Links to talks->* "Richard":https://redmine.jlab.org/attachments/download/1029/klt_7_29_20.html "Stephen":https://redmine.jlab.org/documents/106
290 146 Stephen Kay
291 155 Richard Trotta
* Stephen
292
** Updates on scripts to set pedestal defaults and AdcTdc offsets after hcana change
293
* Richard
294
** Updated plan and schedule for the analysis going forward
295 1 Richard Trotta
296 150 Richard Trotta
Next meeting August 26th @ 4:30 EST
297
298 144 Richard Trotta
----
299
300 139 Richard Trotta
h3. July 8, 2020
301 1 Richard Trotta
302 139 Richard Trotta
*Links to talks->* "Vijay":https://redmine.jlab.org/attachments/download/1023/SHMS%20Proton%20Absorption.ods "Ali":https://redmine.jlab.org/attachments/download/1022/KaonLT_Meeting_Jul_8.pdf
303 150 Richard Trotta
304 140 Richard Trotta
Next meeting July 29 @ 4:30 EST
305 139 Richard Trotta
306
----
307
308 132 Richard Trotta
h3. June 24, 2020
309
310 143 Richard Trotta
*Links to talks->* "Vijay":https://redmine.jlab.org/attachments/download/1014/Vijay_24_June_20.pdf "Richard":https://redmine.jlab.org/attachments/download/1013/KaonLTMeeting_6_24_20.pdf
311 137 Richard Trotta
Next meeting July 8th @ 4:30 EST
312 132 Richard Trotta
313
----
314
315 129 Richard Trotta
h3. June 9, 2020
316
317 135 Richard Trotta
*Links to talks->* "Vijay":https://redmine.jlab.org/attachments/download/1006/Vijay_9_June_20.pdf "Ali":https://redmine.jlab.org/attachments/download/1007/KaonLT_Meeting_Jun_9.pdf "Richard":https://redmine.jlab.org/attachments/download/1005/KaonLTMeeting_6_9_20.pdf
318 129 Richard Trotta
319 131 Richard Trotta
Next meeting June 24th @ 4:30 EST
320 129 Richard Trotta
321
----
322
323 125 Richard Trotta
h3. May 27, 2020
324
325 126 Richard Trotta
*Links to talks->* "Vijay":https://redmine.jlab.org/attachments/download/1002/Vijay_26_May_20.pdf "Ali":https://redmine.jlab.org/attachments/download/1003/KaonLT_Meeting_May_27%20%5BAutosaved%5D.pdf
326 128 Richard Trotta
327 127 Richard Trotta
Next meeting June 9th @ 4:30 EST
328 125 Richard Trotta
329
----
330
331 118 Stephen Kay
h3. May 13, 2020
332 124 Richard Trotta
333 138 Stephen Kay
*Links to talks->* "Stephen":https://redmine.jlab.org/attachments/download/993/KaonLT_Meeting_13_05_20.pdf - Python analysis scripts "Richard":https://redmine.jlab.org/attachments/download/998/KaonLTMeeting_5_13_20.pdf "Ali":https://redmine.jlab.org/attachments/download/997/KaonLT_Meeting_May_13.pdf "Vijay":https://redmine.jlab.org/attachments/download/999/Vijay_13_May_20.pdf
334 1 Richard Trotta
335 127 Richard Trotta
Next meeting May 27th @ 4:30 EST
336 118 Stephen Kay
337 121 Richard Trotta
----
338
339 111 Richard Trotta
h3. April 29, 2020
340
341 138 Stephen Kay
*Links to talks->* "Richard":https://redmine.jlab.org/attachments/download/984/KaonLTMeeting_4_29_20.pdf "Stephen":https://redmine.jlab.org/attachments/download/985/KaonLT_Meeting_29_04_20.pdf - Python code planning "Mark's hcana tracking update":https://redmine.jlab.org/attachments/download/982/Updates-to-HCANA-tracking.pdf
342 106 Richard Trotta
343 127 Richard Trotta
Next meeting May 13th @ 4:30 EST
344 106 Richard Trotta
345 1 Richard Trotta
----
346 106 Richard Trotta
347 111 Richard Trotta
h3. April 15, 2020
348 104 Richard Trotta
349 102 Richard Trotta
*Links to talks->* "Richard":https://redmine.jlab.org/attachments/download/977/KaonLTMeeting_4_15_20.pdf
350 105 Richard Trotta
351 127 Richard Trotta
Next meeting April 29th @ 4:30 EST
352 1 Richard Trotta
353 102 Richard Trotta
----
354 95 Stephen Kay
355 111 Richard Trotta
h3. April 1, 2020
356 100 Stephen Kay
357 138 Stephen Kay
*Links to talks->* "Stephen":https://redmine.jlab.org/attachments/download/949/KaonLT_Meeting_01_04_20.pdf - RF timing "Richard":https://redmine.jlab.org/attachments/download/948/KaonLTMeeting_4_1_20.pdf
358 101 Richard Trotta
359 127 Richard Trotta
Next meeting April 15th @  4:30 EST
360 101 Richard Trotta
361 41 Stephen Kay
----
362 93 Richard Trotta
363 111 Richard Trotta
h3. March 18, 2020
364 93 Richard Trotta
365
*Links to talks->* "Richard's EIC Temple Draft 2":https://redmine.jlab.org/attachments/download/942/DRAFT2_mesonSF_EIC_Temple.pdf
366 1 Richard Trotta
367 127 Richard Trotta
Next meeting April 1st @  4:30 EST
368 93 Richard Trotta
369
----
370 91 Richard Trotta
371 111 Richard Trotta
h3. March 11, 2020
372 92 Richard Trotta
373 1 Richard Trotta
*Links to talks->* "Ali":https://redmine.jlab.org/attachments/download/940/KaonLT_Meeting_Mar_11.pdf "Richard's EIC Temple Draft 1":https://redmine.jlab.org/attachments/download/941/DRAFT1_mesonSF_EIC_Temple.pdf
374 94 Richard Trotta
375 127 Richard Trotta
Next meeting March 18th @  4:30 EST
376 91 Richard Trotta
377
----
378 88 Richard Trotta
379 111 Richard Trotta
h3. Feb 26, 2020
380 90 Richard Trotta
381
* Peter's changes to hcana should be coming soon. Richard will check with Mark when he is down there for an update.
382
* Need to incorporate the latest "BCM updates":https://hallcweb.jlab.org/doc-public/ShowDocument?docid=1034 from Dave Mack.
383 1 Richard Trotta
* Richard should look at the luminosity scalar analysis before and after the BCM changes once he gets his script working again.
384 88 Richard Trotta
**  He is checking with Mark about this while he is down in jlab. 
385 1 Richard Trotta
386 127 Richard Trotta
Next meeting March 11th @  4:30 EST
387 86 Richard Trotta
388 1 Richard Trotta
----
389 86 Richard Trotta
390 111 Richard Trotta
h3. Feb 10, 2020 
391 87 Richard Trotta
392 127 Richard Trotta
Next meeting Feb 26th @ 11 am EST
393 86 Richard Trotta
394
----
395 1 Richard Trotta
396 111 Richard Trotta
h3. Jan 22, 2020
397 83 Richard Trotta
398
*Links to talks->* "Richard's Hall C Winter Talk Draft 1":https://redmine.jlab.org/attachments/download/937/KaonLTHallC_WinterTalk2020_Draft1.pdf
399 85 Richard Trotta
400 127 Richard Trotta
Next meeting Feb 10 @ 11 am EST
401 83 Richard Trotta
402 1 Richard Trotta
----
403 83 Richard Trotta
404 111 Richard Trotta
h3. Jan 15,2020
405 81 Richard Trotta
406 82 Richard Trotta
*Links to talks->* "Richard's Hall C Winter Talk Outline":https://redmine.jlab.org/attachments/download/936/KaonLTHallC_WinterTalk2020.pdf
407 81 Richard Trotta
408 127 Richard Trotta
Next meeting Jan 22 @ 11 am EST
409 81 Richard Trotta
410
----
411 78 Richard Trotta
412 111 Richard Trotta
h3. Jan 8,2020
413 78 Richard Trotta
414 1 Richard Trotta
*Links to talks->* "Richard":https://redmine.jlab.org/documents/76
415 79 Richard Trotta
416 1 Richard Trotta
* Richard
417
** PID efficiency script is coming together
418
*** Tighter cuts and cuts on timing, beta, etc. will be needed for cleaner electron cuts
419
*** Hcal cut should be changed to cut around the mean normalized value instead of cutting above or below it only. This will assure electrons aren't lost.
420
421
Next meeting will be January 15th at 4 pm EST 
422
423 80 Richard Trotta
----
424 113 Richard Trotta
425 112 Richard Trotta
h2. 2019 Meetings
426 80 Richard Trotta
427 141 Stephen Kay
----
428
429 111 Richard Trotta
h3. Dec 17,2019
430
431 77 Richard Trotta
Reminder: Mark Jones' commissioning analysis meetings are bi-weekly and announced by Mark
432
433
* Stephen
434
** Number of passes finished for HMS calorimeter
435
*** Still wiggles in all passes
436
** Finished his report on calibrations, "DC and Calorimeters":https://redmine.jlab.org/documents/74
437
** Put together a list of people's jobs from Regina over the next couple of months, "Regina Analysis Tasks":https://redmine.jlab.org/documents/75
438
*** CUA will be putting together a similar list
439 1 Richard Trotta
440 77 Richard Trotta
* Richard
441
** Fixed one error issue with SHMS calorimeter calibration code (discussed Dec 10th meeting), but still have one error
442
** PID efficiency script plots are complete, but still some questions he needs to work out before a final version
443
*** Eventually need to include tracking into PID efficiencies
444
** Pete brought up the question for a number of multi-hits we are getting
445
*** (Dead Time)+(Trigger efficiency)-EDTM
446
447 127 Richard Trotta
Next meeting will be after the break; Wednesday, January 8th at 3 pm EST
448 77 Richard Trotta
449
----
450 72 Richard Trotta
451 111 Richard Trotta
h3. Dec 10,2019
452 72 Richard Trotta
453 74 Richard Trotta
*Links to talks->* "Richard":https://redmine.jlab.org/documents/73
454
455
* Garth and Stephen were in the most recent SIDIS meeting
456
** Wit had lots of hcana changes but they seem to be critical to our work 
457
*** Changes such as new detector classes
458 1 Richard Trotta
** Hopefully Wit will present these in the next commissioning meeting
459
460 77 Richard Trotta
* Stephen improved wiggles but still prevalent
461 74 Richard Trotta
462
* Richard finished HGCer calibrations, he concluded that the online parameters are sufficient
463
** He also has been looking at SHMS calorimeter calibrations but has had issues running the scripts. Most likely a pathing issue.
464
** The "tasks":https://redmine.jlab.org/projects/kltexp/wiki/Analysis_Tasks page has been updated with a section for efficiencies. 
465
*** A PID efficiency script is currently being developed and hopefully should have some plots for our next meeting.
466
467 127 Richard Trotta
* Next meeting will be December 17th at 3 pm EST.
468 74 Richard Trotta
469 75 Richard Trotta
----
470 74 Richard Trotta
471 111 Richard Trotta
h3. Nov 26,2019
472 71 Richard Trotta
473
*Links to talks->* "Richard":https://redmine.jlab.org/issues/480
474
475
* Stephen
476
** DC SHMS, small-angle has poor performance
477
*** Tighter cuts or PID (currently only looks for electrons)
478
** Vardan said calorimeter wiggles are an ongoing issue with no current solution
479
480
* Richard
481 1 Richard Trotta
** The calibrations are nearing completion with only the HG Cherenkov and SHMS calorimeter yet to be finished. There are also smaller issues with some DC and HMS calorimeter runs.
482 71 Richard Trotta
*** Richard will pick up looking at the HGCer calibrations from Vijay's scripts. 
483
*** Richard will also be looking at the SHMS calorimeter and with the suggestion of getting some negatively polarized SHMS runs from Hem.
484
** The HMS Cherenkov is finished with the conclusion that the calibrations from the online runs are good
485
** We can begin looking forward towards efficiencies. 
486
*** Garth suggested that looking at PID may be an advantageous first steps. Precise definitions of these PIDs will need to be logged.
487
*** Clear notes on efficiencies steps will be needed. They will need to be redefined multiple times in multiple ways. 
488
489
* Hem
490
** Has been looking at the calorimeter as well. 
491 70 Richard Trotta
** He has seen the second band in the spectra for some runs, we suggested further looks into HMS hodoscope and subsequently reference times. A recalibration will need to be performed.  
492
493
----
494
495 111 Richard Trotta
h3. Nov 19,2019
496 1 Richard Trotta
497 70 Richard Trotta
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500 "Richard":https://redmine.jlab.org/issues/500
498
499
* Richard
500
** Finished up TDC cut paper going through the procedure (found "here":https://redmine.jlab.org/issues/500)
501
** Needed to add Carlos pre-trigger designs to an appendix for the paper which clarifies the introduction section
502
503
* Stephen
504
** Issues with DC calibration for only a few runs during each run period
505
** "wiggles" in HMS calorimeter calibrations for some runs
506
*** few runs where HMS cal totally failed (which was dependent on initial parameters)
507
*** Spring looked worse than the rest (surprisingly), but this may be because online calibration wasn't great
508
509 2 Richard Trotta
----
510 68 Richard Trotta
511 111 Richard Trotta
h3. Nov 5,2019
512 68 Richard Trotta
513
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500
514
515
* Timing update (Stephen)
516
** Reference times between Richard and Stephen are very similar and the GitHub is updated accordingly
517
** Richard is going to add the trigger time cuts once the fall runs are finished (by end of week)
518
** First pass of detector reference time parameter files finished
519 1 Richard Trotta
520 68 Richard Trotta
* Peter's hcana code (Richard and Stephen)
521
** Peter's code does not remove ghost bands (already known), but now Stephen is seeing a strang horizontal band for just SHMS hodoscope 2D plots
522
*** Richard has emailed Peter about the issue with no response yet (follow-up soon)
523
** This means we still need the reference time amplitude cut with Peter's code but using just the amplitude cut with Mark's latest version of hcana should be sufficient for calibrations.
524
525
* Calibrations were decided to be done once per shift
526
527
* Next meeting schedule...
528 127 Richard Trotta
** Small meetings Nov 12 and Nov 19 (at 3pm EST) so Richard and Stephen can iron out the timing and calibrations
529
** November 26 (at 3pm EST) will be a larger meeting. 
530 68 Richard Trotta
*** This is the rough deadline we made for finishing up calibrations. 
531
*** This should be sufficient for all detectors (although hodoscope and HG which may persist). The ultimate goal is for all calibrations to be finished up before Winter break!!
532
533
----
534
535 111 Richard Trotta
h3. Oct 22,2019
536 62 Richard Trotta
537 64 Richard Trotta
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500 "Richard":https://redmine.jlab.org/issues/500
538 62 Richard Trotta
539 65 Richard Trotta
* SHMS Reference Time Amplitude Cuts(Stephen)
540
** Extra peaks in HG from cross-talk and "ghost-bands" due to ADC screw up
541
*** cuts applied on SHMS ADC ref time amplitude (greater than zero) done before any further event selection and histogram filling
542
** This is a temporary fix to "ghost-bands" and cross talk
543
*** Although for HG there is still a small peak. The hodoscope is fine.
544
** The time window is easier to set now.
545
** DC has been fine (since it uses TDC)
546
*** DC calibrations should be good to complete, other detectors need more fixes (i.e. the remaining "ghost-band")
547
** Hodoscope still bad but this might be because of that "ghost-band", needs to be further investigated
548
549 1 Richard Trotta
* Peter's hcana fixes for reference time (Richard)
550 67 Richard Trotta
** Peter implemented changes to hcana
551
** Two major issues...
552 1 Richard Trotta
## Amplitude goes to null and integral is low or negative which causes a rate-dependent efficiency. 
553 67 Richard Trotta
*** Peter has used the average pulse value acquired over a large sample of runs for each detector. 
554 1 Richard Trotta
## Timing offset between EL-REAL and 3/4 is 130 ns which causes junk tracks at high SHMS rates (~6% of the time)
555 67 Richard Trotta
*** Peter created a routine to find the best offset by means of matching TDC and ADC
556
** Richard has been checking for bugs in the code. 
557
*** It seems to be ready to implement, Richard emailed Peter for confirmation on the implementation in our group directory
558
559 1 Richard Trotta
* Calibration of HMS detectors when the timing is agreed upon by Stephen and Richard.
560 67 Richard Trotta
** Besides hodoscope which still has an issue with the script
561 65 Richard Trotta
** Stephen and Richard are having a meeting late next week to determine time window values
562 62 Richard Trotta
*** These will be relatively final, but on the wider side if adjustments need to be made in the future
563
564 1 Richard Trotta
-----
565 61 Richard Trotta
566 111 Richard Trotta
h3. Sep 24,2019
567 61 Richard Trotta
568
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500 "Richard":https://redmine.jlab.org/issues/500
569 1 Richard Trotta
570 61 Richard Trotta
-----
571 1 Richard Trotta
572 111 Richard Trotta
h3. Sep 10,2019
573 59 Vijay Kumar
574
*Links to talks->* "Stephen":https://redmine.jlab.org/documents/69 "Ali":https://redmine.jlab.org/documents/72 "Richard":https://redmine.jlab.org/issues/500
575 1 Richard Trotta
576
-----
577 55 Stephen Kay
578 111 Richard Trotta
h3. August 26, 2019
579 55 Stephen Kay
580
*Links to talks->* "Stephen":https://redmine.jlab.org/documents/69 "Ali":https://redmine.jlab.org/documents/70 "Vijay":https://redmine.jlab.org/documents/71 "Richard":https://redmine.jlab.org/issues/500
581 1 Richard Trotta
582 54 Richard Trotta
----
583
584 111 Richard Trotta
h3. June 21, 2019
585 54 Richard Trotta
586 1 Richard Trotta
*Links to talks->* "Hallc Talk Outline":https://redmine.jlab.org/documents/60 
587 54 Richard Trotta
588 42 Stephen Kay
----
589
590 111 Richard Trotta
h3. June 14, 2019
591 1 Richard Trotta
592 46 Richard Trotta
*Links to talks->* "Hallc Talk Outline":https://redmine.jlab.org/documents/60 "Mireille":https://redmine.jlab.org/documents/64 "Update-Mireille":https://redmine.jlab.org/documents/65 "Vijay":https://redmine.jlab.org/attachments/download/814/Analy_update3.pdf
593 42 Stephen Kay
594
595 35 Stephen Kay
----
596 1 Richard Trotta
597 111 Richard Trotta
h3. June 4, 2019
598 36 Vijay Kumar
599 1 Richard Trotta
*Links to talks->* "Stephen":https://redmine.jlab.org/documents/56 "Nathan":https://redmine.jlab.org/documents/57 "Vijay":https://redmine.jlab.org/documents/58 "Richard":https://redmine.jlab.org/documents/59 "Hallc Talk Outline":https://redmine.jlab.org/documents/60 "Mireille":https://redmine.jlab.org/documents/61
600 35 Stephen Kay
601 1 Richard Trotta
602 35 Stephen Kay
----
603 1 Richard Trotta
604 111 Richard Trotta
h3. May 21, 2019
605 1 Richard Trotta
606
*Links to talks->* "Richard":https://redmine.jlab.org/documents/52 "Mireille":https://redmine.jlab.org/documents/? "Stephen":https://redmine.jlab.org/documents/53 "Nathan":https://redmine.jlab.org/documents/54 "Vijay":https://redmine.jlab.org/documents/55
607 35 Stephen Kay
608
----
609 1 Richard Trotta
610 111 Richard Trotta
h3. May 14, 2019
611 1 Richard Trotta
612 35 Stephen Kay
*Links to talks->* "Richard":https://redmine.jlab.org/documents/48 "Carlos' slides":https://redmine.jlab.org/documents/49 "Mireille":https://redmine.jlab.org/documents/50 "Stephen":https://redmine.jlab.org/documents/51
613 1 Richard Trotta
614 35 Stephen Kay
----
615 1 Richard Trotta
616 111 Richard Trotta
h3. April 30, 2019
617 1 Richard Trotta
618
*Links to talks->* "Richard":https://redmine.jlab.org/documents/45 "Richard's slides in wiki":https://redmine.jlab.org/projects/kltexp/wiki/Analysis_How-To "Brad Computing":https://redmine.jlab.org/documents/46 "Stephen":https://redmine.jlab.org/documents/47
619 35 Stephen Kay
620 1 Richard Trotta
----
621
622
h3. February 4, 2019
623
624
*Links to talks->* "Richard":https://redmine.jlab.org/documents/43 "Stephen":https://redmine.jlab.org/documents/44
625
626
----
627 113 Richard Trotta
628 112 Richard Trotta
h2. 2018 Meetings
629 141 Stephen Kay
630
----
631 111 Richard Trotta
632
h3. August 21, 2018
633
634 1 Richard Trotta
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
635 35 Stephen Kay
636 1 Richard Trotta
----
637 35 Stephen Kay
638 111 Richard Trotta
h3. August 8, 2018
639 35 Stephen Kay
640
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
641 1 Richard Trotta
642
----
643 35 Stephen Kay
644 111 Richard Trotta
h3. August 3, 2018
645 1 Richard Trotta
646 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383
647
*Links to talks->*
648 1 Richard Trotta
649 35 Stephen Kay
----
650 1 Richard Trotta
651 111 Richard Trotta
h3. July 11, 2018
652 1 Richard Trotta
653 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #384
654 1 Richard Trotta
655 35 Stephen Kay
*Action items:*
656 1 Richard Trotta
657 35 Stephen Kay
* Update run plan, e.g. add prescales (Garth)
658
* Check on details of: magnet cycling procedure, minimum angles, MCC fringe field steering, beam energy measurements, optics checks (Tanja)
659
* Identify additional run coordinators (Tanja)
660
* Encourage collaborators to take shifts, e.g. FIU (Pete)
661
* Draft email about shifts etc. to collaboration (Tanja)
662
* Develop diagnostic scripts and kaonLT specific (Richard, Ryan)
663
* Continue documentation development, e.g. checklist, shift taker instructions, HowTo or link to generic Hall C HowTo, task list, web page (Richard, Garth)
664 1 Richard Trotta
665 35 Stephen Kay
*Discussions:*
666
667
* SHMS Aerogel Cherenkov: tray has been changed to SP-11 on 10 July, nominal time for change is 8 hours, one tray can stay in the hall to minimize overhead
668
* HGC: waiting for re-installation
669
* Trigger checkout: main items to keep in mind: fADC thresholds, timing HMS/SHMS - leading arm, possible rate limitations
670 1 Richard Trotta
* Shifts
671
* Diagnostics scripts and documentation
672
* Personnel schedules
673
674
----
675
676 111 Richard Trotta
h3. June 28, 2018
677 1 Richard Trotta
678
*Links to talks->* "Richard":https://redmine.jlab.org/documents/34
679
680
*Action Items:*
681
682
* Develop and post shift schedule. Send out request. Find out who is KAONLT liaison (Tanja)
683
* Contact potential run coordinators. (Tanja)
684
* Aerogel tray exchange for start of experiment and coordination of future exchanges (Vladimir)
685
* Update runplan and prepare documents needed for shift crew, e.g. run sheets (Garth)
686
* Set up a web page to collect and link from Redmine - How-To documents, initial calibrations, etc. (Garth, Richard)
687
* Adapt luminosity scan script to calculate kaon yields by run number for use during experiment by shift crew - has to be simple to use. (Richard)
688
* Develop trigger/detector checkout plan (Tanja, initial draft)
689
** Are all experts available at run start, experts needed: coincidence timing , Harp Scans, BCM calibrations, ...
690
* Find out from JLab what the anticipated settings are for limit switches for both spectrometers and for separation angle in between them. Also find out what magnet cycling procedure should be used for L/T quality separation data (Tanja)
691
* Find out if all aerogel trays needed for experiment can be stored inside Hall C to avoid having to open truck ramp (Vladimir)
692
693
*Analysis Updates:*
694
695
* Ryan 
696
** resolving differences between his analysis and Richard's
697
698
* Richard
699
** Discussed with Mark Jones and is cross checking his January luminosity scan analysis against Mark's. Realized that BCM calibrations (gains, offsets etc) are different - currently working on fixing that, presents current results - low curent point is ~10% below unity, discussion that this seems to indicate that BCM offsets are the issue as low current points would be most sensitive, is planning to also double-check the BCM calibration procedure - had discussion with Dave Mack at JLab
700
** Presents a script developed for luminosity scans that determines yields for a run number input on command line. Discussion this could be good to adapt for kaon counting during experiment.
701
702
----
703
704 111 Richard Trotta
h3. May 31, 2018
705 1 Richard Trotta
706 35 Stephen Kay
*Links to talks->* "Samip":https://redmine.jlab.org/documents/30
707 1 Richard Trotta
708 35 Stephen Kay
----
709 1 Richard Trotta
710 111 Richard Trotta
h3. May 17, 2018 
711 1 Richard Trotta
712 35 Stephen Kay
*Links to talks->* "Richard":https://redmine.jlab.org/documents/29, "Ryan":https://hallcweb.jlab.org/DocDB/0009/000968/001/Presentation.pdf, "Samip":https://redmine.jlab.org/documents/30
713 2 Richard Trotta
714 35 Stephen Kay
* Luminosity scans (Richard, Ryan)
715 111 Richard Trotta
** Carbon scan from April seems consistent with no boiling, LH3 and LD2 show deviation from unity, should check effect of EDTM events on efficiencies
716 35 Stephen Kay
** Carbon scans from January (low rates) have large deviations from unity, in particular behavior at higher currents (>40uA), e.g. cpu dead time, that is not yet understood
717
** discussion about pre-scale factors
718 1 Richard Trotta
719 35 Stephen Kay
* Discussion about Richard's script extracting and printing information from report files and trees including histograms
720
** Add option for looking at yields with cuts on cointime, target window, and missing mass
721
** Add option to look at real peak vs. background level
722 1 Richard Trotta
723 35 Stephen Kay
* H(e,e'p) kinematics investigation for fall run (Samip)
724
** Optimal range is between electron angles of 17-20 degrees, time required ranges from ~1 hour at 17 degrees to ~3 hour at 20 degrees, other angles may be of interest for disentangling charge and current dependent effects
725 1 Richard Trotta
726 35 Stephen Kay
* *Action Items*
727
** Luminosity scans at low rates from January (Richard)
728
** Luminosity scans from April with corrected efficiencies, e.d. DT (Ryan)
729
** H(e,e'p) and H(e,e') kinematics for upcoming Kaon LT run (Samip)
730
** Kaon LT detailed run plan (Garth, Pete, Tanja)
731
** Preparations, e.g. report files, diagnostic histograms and real time monitoring, shift worker instructions, optimization of trees (all)
732 1 Richard Trotta
733
----
734
735 111 Richard Trotta
h3. May 10, 2018
736 35 Stephen Kay
737 2 Richard Trotta
*Links to talks->* "Hem":https://redmine.jlab.org/documents/24, "Richard":https://redmine.jlab.org/documents/23, "Ryan, ":https://redmine.jlab.org/documents/20 "Samip":https://redmine.jlab.org/documents/26
738 35 Stephen Kay
739
* Luminosity Scans January 2018 (Richard)
740
** Tracking-based analysis for Runs 1415-1423, .. for now focus on HMS, typical HMS S1X rates are <
741
** Cuts applied: PID for electrons (Cer, Cal), acceptance (delta)
742
** Efficiency calculation was investigated in detail and applied using scalers from trees
743
** Results for carbon (normalized to 30uA) show large variation - need to understand
744
** *Next steps:*
745
*** Double check calculation of computer lifetime, look for differences in TRIG and PRETRIG scalers
746
*** Check stability of pre-scale (Ryan saw changes within runs)
747
*** Check if detector calibrations for runs are implemented correctly
748
*** Analyze with Ryan's cuts
749 1 Richard Trotta
750 35 Stephen Kay
* Luminosity Scans April 2018 (Ryan)
751
** Confirms Richard's earlier finding that scaler-based analysis is not reliable and that it's best to analyze event-by-event
752
** Tracking-based analysis for runs 2073-2095
753
** Cuts applied: PID for electrons (TOF, Cal, Chi2), acceptance (delta and angles), BCM4a
754
** Included most recent detector calibrations in replay of these runs
755
** Efficiencies from report file mainly, may need to update tracking efficiency implementation
756
** Found that calculations of computer deadtime requires different set of scalers for runs from January to those from April 2018
757
** Results show carbon yields consistent with unity within error (0.5% error bars), and boiling for hydrogen and deuterium
758
** *Next steps:*
759 5 Richard Trotta
*** Check tracking efficiency
760 35 Stephen Kay
761
* *Global comments on Luminosity Scans (so far)*
762 1 Richard Trotta
** April 2018 scans show hydrogen and deuterium target boiling on level of 3-4%, Carbon is consistent with no boiling, as expected - based on description, new targets are expected to have less boiling than those used previously, e.g. in FPI2. Double check this.
763 35 Stephen Kay
** Efficiencies in report files need to be updated, e.g. CPU deadtime (Richard)
764
** Check if BCM4a is the one closest to the target - get a map of the hall (Richard, Ryan)
765
** Uncertainties on current
766
** Detector calibrations
767 1 Richard Trotta
** HMS vs. SHMS
768 35 Stephen Kay
769
* eK+ coincidence time from SIDIS Spring 2018 run (Samip)
770
** Worked with Mark Jones on coincidence time calculation - now available in hcana (see Samip's 10 May 2018 email for more details)
771
** runs used in this analysis: 3423 with Q2=3.1 GeV2 and W=2.78 GeV
772
** Coincidence time spectrum shows peak separations >2 ns corresponding to different accelerator frequency
773
** Missing mass spectra: Kaon peak clearly visible, also see pions even after cuts
774
** Found that pions appear localized in phase space - seems to be due to end point in kinematic phase space
775 1 Richard Trotta
** *Next steps:*
776 2 Richard Trotta
*** Look for a run with kaon momentum closer to 3 GeV/c (aerogel threshold is ~3 GeV/c for kaons for n=1.015)
777 35 Stephen Kay
778
* Yield normalized ratios from SIDIS (Hem)
779
** Yield ratios of data to MC match well in shape, but normalization seems not quite right
780
** *Next steps:*
781 4 Richard Trotta
*** Check if efficiencies, currents, run time etc. are taken into account correctly
782
783
----
784 35 Stephen Kay
785 111 Richard Trotta
h3. April 26, 2018
786 4 Richard Trotta
787 35 Stephen Kay
*Links to talks->* "Richard,":https://redmine.jlab.org/documents/18 "Ryan, ":https://redmine.jlab.org/documents/20 "Samip":https://redmine.jlab.org/documents/25
788 4 Richard Trotta
789 35 Stephen Kay
* Discussion luminosity scan analysis (earlier scan) - Richard
790
** Shown is a scaler-based analysis using scalers from report file and from ROOT tree - the values are different, why that is has to be checked
791
** Notes on efficiencies in report file:
792
*** DT (EDTM) is not electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS
793
*** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc)
794
*** Tracking efficiency needs to be checked
795
*** 3/4 trigger efficiency seems ok
796
* Discussion luminosity scan analysis (later scan) - Ryan
797
** Fewer carbon runs than earlier scan
798
** Shown is a tracking-based analysis using data from the ROOT trees
799 111 Richard Trotta
** First results for carbon, LH3, and LD2, but efficiencies need to be checked
800 35 Stephen Kay
* SIDIS analysis - Hem
801
** Shown is a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet to be applied.
802
** Discussion about agreement in z and apparent offset - relation of this offset with spectrometer offset
803
* Analysis of exclusive events in SIDIS - Samip
804
** Shown is a look at the first kaon events in exclusive limit of SIDIS data
805
** Ongoing work on implementing coincidence time into tree
806
* Discussion of run plan, and in particular possible low Q2/low energy
807
** Assume that kaon low Q2=0.4 already included - have kinematics with specified beam energies, if needed
808
** For pion form factor and LT, have two possible settings that can use the prescribed beam energies: Q2=1.45 and 0.35 GeV2 - prioritize towards the higher Q2 as not as sensitive to offsets
809
** Garth will put this together in a draft email
810
811 12 Richard Trotta
----
812
813 111 Richard Trotta
h3. March 29, 2018
814 12 Richard Trotta
815 35 Stephen Kay
*Links to talks->* "Richard, ":https://redmine.jlab.org/documents/16 "Samip":https://redmine.jlab.org/documents/27
816 13 Richard Trotta
817 35 Stephen Kay
* Details of adding points to fall run plan - will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja)
818
* Luminosity scans (Ryan, Andres, Richard, Pete)
819
* Macros, SIDIS analysis (Hem, Anashe)
820
* Elastic data (TBD)
821
822 14 Richard Trotta
----
823 18 Richard Trotta
824 111 Richard Trotta
h3. February 22, 2018
825 18 Richard Trotta
826 35 Stephen Kay
*Links to talks->* "Andres":https://redmine.jlab.org/documents/19
827 18 Richard Trotta
828 35 Stephen Kay
*  Discussion of Andres' slides on elastic W calculation in hcana - initial issue with negative W values seems to be due to outdated information in standard.kinematics file. Additional investigation ongoing.
829
* Brief description of Samip's work - working on coincidence timing decoding with JLab staff and re-optimization of kinematics
830
* Discussion of Richard's slides on run plan kinematics and preparations -
831
** everyone agrees that in general want to have as many L/T cross section separations as possible in a robust run plan balancing statistics vs. systematics
832
** before actual run may want to do a 3D optimization in all kinematic variables to get the best possible delta(epsilon) for the L/T separations
833
** for each setting will need 1-2 shifts for calibrations - need to negotiate with other experiments in run group
834
** kinematics plots W-Q2 show that still need to do some optimization
835
** run sheets: include raster size, update coincidence count labeling, and carbon target labeling
836
* Discussion of next meeting. Garth at JLab 8-16 March - might have meeting during that time.
837 26 Richard Trotta
838 35 Stephen Kay
* *Action Items:*
839
** Post slides/notes from this meeting and procedure to set up hcana in Redmine (Tanja)
840
** Update run sheet and kinematic optimization for W/Q2 (Garth)
841
** Circulate elastic calculations for kinematic settings (Samip)
842
** Continue investigation of elastic data and run plan kinematics (Andres/Richard)
843
** Test software installation instructions (Pete)
844
** Draft email to JLab management about need for small angle beam pipe - need to have HMS minimum angle of less than 13 degrees for kaon L/T separations (Tanja) 
845 32 Stephen Kay
846
----