Project

General

Profile

Kaon LT Meetings » History » Version 106

Richard Trotta, 04/29/2020 04:33 PM

1 1 Richard Trotta
{{>toc}}
2
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
9 106 Richard Trotta
h2. April 29, 2020
10
11
*Links to talks->* "Richard": "Stephen":
12
13
Next meeting  @ 4:30 ET
14
15
----
16
17 102 Richard Trotta
h2. April 15, 2020
18
19 104 Richard Trotta
*Links to talks->* "Richard":https://redmine.jlab.org/attachments/download/977/KaonLTMeeting_4_15_20.pdf
20 102 Richard Trotta
21 105 Richard Trotta
Next meeting April 29th @ 4:30 ET
22 102 Richard Trotta
23
----
24
25 95 Stephen Kay
h2. April 1, 2020
26
27 100 Stephen Kay
*Links to talks->* "Stephen":https://redmine.jlab.org/attachments/download/949/KaonLT_Meeting_01_04_20.pdf "Richard":https://redmine.jlab.org/attachments/download/948/KaonLTMeeting_4_1_20.pdf
28 95 Stephen Kay
29 101 Richard Trotta
Next meeting April 15th @  4:30 ET
30
31 96 Stephen Kay
----
32 41 Stephen Kay
33 93 Richard Trotta
h2. March 18, 2020
34
35
*Links to talks->* "Richard's EIC Temple Draft 2":https://redmine.jlab.org/attachments/download/942/DRAFT2_mesonSF_EIC_Temple.pdf
36
37 94 Richard Trotta
Next meeting April 1st @  4:30 ET
38
39 93 Richard Trotta
----
40
41 91 Richard Trotta
h2. March 11, 2020
42
43 92 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
44 94 Richard Trotta
45
Next meeting March 18th @  4:30 ET
46 91 Richard Trotta
47
----
48
49 88 Richard Trotta
h2. Feb 26, 2020
50
51 90 Richard Trotta
* Peter's changes to hcana should be coming soon. Richard will check with Mark when he is down there for an update.
52
* Need to incorporate the latest "BCM updates":https://hallcweb.jlab.org/doc-public/ShowDocument?docid=1034 from Dave Mack.
53
* Richard should look at the luminosity scalar analysis before and after the BCM changes once he gets his script working again.
54
**  He is checking with Mark about this while he is down in jlab. 
55 88 Richard Trotta
56 1 Richard Trotta
Next meeting March 11th @  4:30 ET
57 88 Richard Trotta
58 86 Richard Trotta
----
59
60 90 Richard Trotta
h2. Feb 10, 2020 
61 86 Richard Trotta
62 87 Richard Trotta
Next meeting Feb 26th @ 11 am ET
63 86 Richard Trotta
64
----
65
66 83 Richard Trotta
h2. Jan 22, 2020
67
68
*Links to talks->* "Richard's Hall C Winter Talk Draft 1":https://redmine.jlab.org/attachments/download/937/KaonLTHallC_WinterTalk2020_Draft1.pdf
69
70 85 Richard Trotta
Next meeting Feb 10 @ 11 am ET
71
72 83 Richard Trotta
----
73
74 81 Richard Trotta
h2. Jan 15,2020
75
76 82 Richard Trotta
*Links to talks->* "Richard's Hall C Winter Talk Outline":https://redmine.jlab.org/attachments/download/936/KaonLTHallC_WinterTalk2020.pdf
77 81 Richard Trotta
78 84 Richard Trotta
Next meeting Jan 22 @ 11 am ET
79
80 81 Richard Trotta
----
81
82 78 Richard Trotta
h2. Jan 8,2020
83
84
*Links to talks->* "Richard":https://redmine.jlab.org/documents/76
85 79 Richard Trotta
86 80 Richard Trotta
* Richard
87
** PID efficiency script is coming together
88
*** Tighter cuts and cuts on timing, beta, etc. will be needed for cleaner electron cuts
89
*** 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.
90
91
Next meeting will be January 15th at 4 pm ET 
92
93 78 Richard Trotta
----
94
95 77 Richard Trotta
h2. Dec 17,2019
96
97
Reminder: Mark Jones' commissioning analysis meetings are bi-weekly and announced by Mark
98
99
* Stephen
100
** Number of passes finished for HMS calorimeter
101
*** Still wiggles in all passes
102
** Finished his report on calibrations, "DC and Calorimeters":https://redmine.jlab.org/documents/74
103
** 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
104
*** CUA will be putting together a similar list
105
106
* Richard
107
** Fixed one error issue with SHMS calorimeter calibration code (discussed Dec 10th meeting), but still have one error
108
** PID efficiency script plots are complete, but still some questions he needs to work out before a final version
109
*** Eventually need to include tracking into PID efficiencies
110
** Pete brought up the question for a number of multi-hits we are getting
111
*** (Dead Time)+(Trigger efficiency)-EDTM
112
113
Next meeting will be after the break; Wednesday, January 8th at 3 pm ET
114
115
----
116
117 72 Richard Trotta
h2. Dec 10,2019
118 73 Richard Trotta
119 72 Richard Trotta
*Links to talks->* "Richard":https://redmine.jlab.org/documents/73
120 74 Richard Trotta
121
* Garth and Stephen were in the most recent SIDIS meeting
122
** Wit had lots of hcana changes but they seem to be critical to our work 
123
*** Changes such as new detector classes
124
** Hopefully Wit will present these in the next commissioning meeting
125 1 Richard Trotta
126 77 Richard Trotta
* Stephen improved wiggles but still prevalent
127 74 Richard Trotta
128
* Richard finished HGCer calibrations, he concluded that the online parameters are sufficient
129
** He also has been looking at SHMS calorimeter calibrations but has had issues running the scripts. Most likely a pathing issue.
130
** The "tasks":https://redmine.jlab.org/projects/kltexp/wiki/Analysis_Tasks page has been updated with a section for efficiencies. 
131
*** A PID efficiency script is currently being developed and hopefully should have some plots for our next meeting.
132
133 1 Richard Trotta
* Next meeting will be December 17th at 3 pm ET.
134 74 Richard Trotta
135 75 Richard Trotta
----
136 74 Richard Trotta
137 71 Richard Trotta
h2. Nov 26,2019
138
139
*Links to talks->* "Richard":https://redmine.jlab.org/issues/480
140
141
* Stephen
142
** DC SHMS, small-angle has poor performance
143
*** Tighter cuts or PID (currently only looks for electrons)
144
** Vardan said calorimeter wiggles are an ongoing issue with no current solution
145
146
* Richard
147
** 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.
148
*** Richard will pick up looking at the HGCer calibrations from Vijay's scripts. 
149
*** Richard will also be looking at the SHMS calorimeter and with the suggestion of getting some negatively polarized SHMS runs from Hem.
150
** The HMS Cherenkov is finished with the conclusion that the calibrations from the online runs are good
151
** We can begin looking forward towards efficiencies. 
152
*** Garth suggested that looking at PID may be an advantageous first steps. Precise definitions of these PIDs will need to be logged.
153
*** Clear notes on efficiencies steps will be needed. They will need to be redefined multiple times in multiple ways. 
154
155
* Hem
156
** Has been looking at the calorimeter as well. 
157
** 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.  
158 70 Richard Trotta
159
----
160
161
h2. Nov 19,2019
162
163
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500 "Richard":https://redmine.jlab.org/issues/500
164
165
* Richard
166
** Finished up TDC cut paper going through the procedure (found "here":https://redmine.jlab.org/issues/500)
167
** Needed to add Carlos pre-trigger designs to an appendix for the paper which clarifies the introduction section
168
169
* Stephen
170
** Issues with DC calibration for only a few runs during each run period
171
** "wiggles" in HMS calorimeter calibrations for some runs
172
*** few runs where HMS cal totally failed (which was dependent on initial parameters)
173
*** Spring looked worse than the rest (surprisingly), but this may be because online calibration wasn't great
174
175 2 Richard Trotta
----
176
177 68 Richard Trotta
h2. Nov 5,2019
178
179
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500
180
181
* Timing update (Stephen)
182
** Reference times between Richard and Stephen are very similar and the GitHub is updated accordingly
183
** Richard is going to add the trigger time cuts once the fall runs are finished (by end of week)
184
** First pass of detector reference time parameter files finished
185
186
* Peter's hcana code (Richard and Stephen)
187
** 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
188
*** Richard has emailed Peter about the issue with no response yet (follow-up soon)
189
** 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.
190
191
* Calibrations were decided to be done once per shift
192
193
* Next meeting schedule...
194
** Small meetings Nov 12 and Nov 19 (at 3pm ET) so Richard and Stephen can iron out the timing and calibrations
195
** November 26 (at 3pm ET) will be a larger meeting. 
196
*** This is the rough deadline we made for finishing up calibrations. 
197
*** 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!!
198
199
----
200
201 62 Richard Trotta
h2. Oct 22,2019
202
203 64 Richard Trotta
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500 "Richard":https://redmine.jlab.org/issues/500
204 62 Richard Trotta
205 65 Richard Trotta
* SHMS Reference Time Amplitude Cuts(Stephen)
206
** Extra peaks in HG from cross-talk and "ghost-bands" due to ADC screw up
207
*** cuts applied on SHMS ADC ref time amplitude (greater than zero) done before any further event selection and histogram filling
208
** This is a temporary fix to "ghost-bands" and cross talk
209
*** Although for HG there is still a small peak. The hodoscope is fine.
210
** The time window is easier to set now.
211
** DC has been fine (since it uses TDC)
212
*** DC calibrations should be good to complete, other detectors need more fixes (i.e. the remaining "ghost-band")
213
** Hodoscope still bad but this might be because of that "ghost-band", needs to be further investigated
214
215
* Peter's hcana fixes for reference time (Richard)
216
** Peter implemented changes to hcana
217
** Two major issues...
218 67 Richard Trotta
## Amplitude goes to null and integral is low or negative which causes a rate-dependent efficiency. 
219
*** Peter has used the average pulse value acquired over a large sample of runs for each detector. 
220 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)
221 67 Richard Trotta
*** Peter created a routine to find the best offset by means of matching TDC and ADC
222
** Richard has been checking for bugs in the code. 
223
*** It seems to be ready to implement, Richard emailed Peter for confirmation on the implementation in our group directory
224
225
* Calibration of HMS detectors when the timing is agreed upon by Stephen and Richard.
226
** Besides hodoscope which still has an issue with the script
227
** Stephen and Richard are having a meeting late next week to determine time window values
228
*** These will be relatively final, but on the wider side if adjustments need to be made in the future
229 65 Richard Trotta
230 62 Richard Trotta
-----
231
232 61 Richard Trotta
h2. Sep 24,2019
233
234 64 Richard Trotta
*Links to talks->* "Stephen":https://redmine.jlab.org/issues/500 "Richard":https://redmine.jlab.org/issues/500
235 61 Richard Trotta
236
-----
237
238 59 Vijay Kumar
h2. Sep 10,2019
239 1 Richard Trotta
240 64 Richard Trotta
*Links to talks->* "Stephen":https://redmine.jlab.org/documents/69 "Ali":https://redmine.jlab.org/documents/72 "Richard":https://redmine.jlab.org/issues/500
241 59 Vijay Kumar
242
-----
243 55 Stephen Kay
244 1 Richard Trotta
h2. August 26, 2019
245 55 Stephen Kay
246 64 Richard Trotta
*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
247 55 Stephen Kay
248
----
249
250 54 Richard Trotta
h2. June 21, 2019
251
252
*Links to talks->* "Hallc Talk Outline":https://redmine.jlab.org/documents/60 
253
254
----
255
256 42 Stephen Kay
h2. June 14, 2019
257
258 53 Garth Huber
*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
259 52 Garth Huber
260 46 Richard Trotta
261 42 Stephen Kay
----
262
263 35 Stephen Kay
h2. June 4, 2019
264 1 Richard Trotta
265 40 Mireille Muhoza
*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
266 36 Vijay Kumar
267 1 Richard Trotta
268 35 Stephen Kay
----
269 1 Richard Trotta
270 35 Stephen Kay
h2. May 21, 2019
271 1 Richard Trotta
272 35 Stephen Kay
*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
273
274 1 Richard Trotta
----
275
276 35 Stephen Kay
h2. May 14, 2019
277 1 Richard Trotta
278 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
279 1 Richard Trotta
280
----
281
282 35 Stephen Kay
h2. April 30, 2019
283 1 Richard Trotta
284 35 Stephen Kay
*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
285 1 Richard Trotta
286
----
287
288 35 Stephen Kay
h2. February 4, 2019
289 1 Richard Trotta
290 35 Stephen Kay
*Links to talks->* "Richard":https://redmine.jlab.org/documents/43 "Stephen":https://redmine.jlab.org/documents/44
291 1 Richard Trotta
292 35 Stephen Kay
----
293 1 Richard Trotta
294 35 Stephen Kay
h2. August 21, 2018
295 1 Richard Trotta
296 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
297 1 Richard Trotta
298 35 Stephen Kay
----
299 1 Richard Trotta
300 35 Stephen Kay
h2. August 8, 2018
301 1 Richard Trotta
302 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
303
304 1 Richard Trotta
----
305
306 35 Stephen Kay
h2. August 3, 2018
307 1 Richard Trotta
308 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383
309
*Links to talks->*
310 1 Richard Trotta
311 35 Stephen Kay
----
312 1 Richard Trotta
313 35 Stephen Kay
h2. July 11, 2018
314 1 Richard Trotta
315 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #384
316 1 Richard Trotta
317 35 Stephen Kay
*Action items:*
318 1 Richard Trotta
319 35 Stephen Kay
* Update run plan, e.g. add prescales (Garth)
320
* Check on details of: magnet cycling procedure, minimum angles, MCC fringe field steering, beam energy measurements, optics checks (Tanja)
321
* Identify additional run coordinators (Tanja)
322
* Encourage collaborators to take shifts, e.g. FIU (Pete)
323
* Draft email about shifts etc. to collaboration (Tanja)
324
* Develop diagnostic scripts and kaonLT specific (Richard, Ryan)
325
* Continue documentation development, e.g. checklist, shift taker instructions, HowTo or link to generic Hall C HowTo, task list, web page (Richard, Garth)
326 1 Richard Trotta
327 35 Stephen Kay
*Discussions:*
328 1 Richard Trotta
329 35 Stephen Kay
* 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
330
* HGC: waiting for re-installation
331
* Trigger checkout: main items to keep in mind: fADC thresholds, timing HMS/SHMS - leading arm, possible rate limitations
332
* Shifts
333
* Diagnostics scripts and documentation
334
* Personnel schedules
335 1 Richard Trotta
336
----
337
338
h2. June 28, 2018
339
340
*Links to talks->* "Richard":https://redmine.jlab.org/documents/34
341
342
*Action Items:*
343
344
* Develop and post shift schedule. Send out request. Find out who is KAONLT liaison (Tanja)
345
* Contact potential run coordinators. (Tanja)
346
* Aerogel tray exchange for start of experiment and coordination of future exchanges (Vladimir)
347
* Update runplan and prepare documents needed for shift crew, e.g. run sheets (Garth)
348
* Set up a web page to collect and link from Redmine - How-To documents, initial calibrations, etc. (Garth, Richard)
349
* 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)
350
* Develop trigger/detector checkout plan (Tanja, initial draft)
351
** Are all experts available at run start, experts needed: coincidence timing , Harp Scans, BCM calibrations, ...
352
* 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)
353
* Find out if all aerogel trays needed for experiment can be stored inside Hall C to avoid having to open truck ramp (Vladimir)
354
355
*Analysis Updates:*
356
357
* Ryan 
358
** resolving differences between his analysis and Richard's
359
360
* Richard
361
** 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
362
** 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.
363
364
----
365
366 35 Stephen Kay
h2. May 31, 2018
367 1 Richard Trotta
368 35 Stephen Kay
*Links to talks->* "Samip":https://redmine.jlab.org/documents/30
369 1 Richard Trotta
370 35 Stephen Kay
----
371 1 Richard Trotta
372 35 Stephen Kay
h2. May 17, 2018 
373 1 Richard Trotta
374 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
375 2 Richard Trotta
376 35 Stephen Kay
* Luminosity scans (Richard, Ryan)
377
** Carbon scan from April seems consistent with no boiling, LH2 and LD2 show deviation from unity, should check effect of EDTM events on efficiencies
378
** 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
379
** discussion about pre-scale factors
380 1 Richard Trotta
381 35 Stephen Kay
* Discussion about Richard's script extracting and printing information from report files and trees including histograms
382
** Add option for looking at yields with cuts on cointime, target window, and missing mass
383
** Add option to look at real peak vs. background level
384 1 Richard Trotta
385 35 Stephen Kay
* H(e,e'p) kinematics investigation for fall run (Samip)
386
** 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
387 1 Richard Trotta
388 35 Stephen Kay
* *Action Items*
389
** Luminosity scans at low rates from January (Richard)
390
** Luminosity scans from April with corrected efficiencies, e.d. DT (Ryan)
391
** H(e,e'p) and H(e,e') kinematics for upcoming Kaon LT run (Samip)
392
** Kaon LT detailed run plan (Garth, Pete, Tanja)
393
** Preparations, e.g. report files, diagnostic histograms and real time monitoring, shift worker instructions, optimization of trees (all)
394 1 Richard Trotta
395
----
396
397 35 Stephen Kay
h2. May 10, 2018
398 1 Richard Trotta
399 35 Stephen Kay
*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
400 2 Richard Trotta
401 35 Stephen Kay
* Luminosity Scans January 2018 (Richard)
402
** Tracking-based analysis for Runs 1415-1423, .. for now focus on HMS, typical HMS S1X rates are <
403
** Cuts applied: PID for electrons (Cer, Cal), acceptance (delta)
404
** Efficiency calculation was investigated in detail and applied using scalers from trees
405
** Results for carbon (normalized to 30uA) show large variation - need to understand
406
** *Next steps:*
407
*** Double check calculation of computer lifetime, look for differences in TRIG and PRETRIG scalers
408
*** Check stability of pre-scale (Ryan saw changes within runs)
409
*** Check if detector calibrations for runs are implemented correctly
410
*** Analyze with Ryan's cuts
411 1 Richard Trotta
412 35 Stephen Kay
* Luminosity Scans April 2018 (Ryan)
413
** Confirms Richard's earlier finding that scaler-based analysis is not reliable and that it's best to analyze event-by-event
414
** Tracking-based analysis for runs 2073-2095
415
** Cuts applied: PID for electrons (TOF, Cal, Chi2), acceptance (delta and angles), BCM4a
416
** Included most recent detector calibrations in replay of these runs
417
** Efficiencies from report file mainly, may need to update tracking efficiency implementation
418
** Found that calculations of computer deadtime requires different set of scalers for runs from January to those from April 2018
419
** Results show carbon yields consistent with unity within error (0.5% error bars), and boiling for hydrogen and deuterium
420
** *Next steps:*
421
*** Check tracking efficiency
422 5 Richard Trotta
423 35 Stephen Kay
* *Global comments on Luminosity Scans (so far)*
424
** 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.
425
** Efficiencies in report files need to be updated, e.g. CPU deadtime (Richard)
426
** Check if BCM4a is the one closest to the target - get a map of the hall (Richard, Ryan)
427
** Uncertainties on current
428
** Detector calibrations
429
** HMS vs. SHMS
430 1 Richard Trotta
431 35 Stephen Kay
* eK+ coincidence time from SIDIS Spring 2018 run (Samip)
432
** Worked with Mark Jones on coincidence time calculation - now available in hcana (see Samip's 10 May 2018 email for more details)
433
** runs used in this analysis: 3423 with Q2=3.1 GeV2 and W=2.78 GeV
434
** Coincidence time spectrum shows peak separations >2 ns corresponding to different accelerator frequency
435
** Missing mass spectra: Kaon peak clearly visible, also see pions even after cuts
436
** Found that pions appear localized in phase space - seems to be due to end point in kinematic phase space
437
** *Next steps:*
438
*** Look for a run with kaon momentum closer to 3 GeV/c (aerogel threshold is ~3 GeV/c for kaons for n=1.015)
439 2 Richard Trotta
440 35 Stephen Kay
* Yield normalized ratios from SIDIS (Hem)
441
** Yield ratios of data to MC match well in shape, but normalization seems not quite right
442
** *Next steps:*
443
*** Check if efficiencies, currents, run time etc. are taken into account correctly
444 4 Richard Trotta
445
----
446
447 35 Stephen Kay
h2. April 26, 2018
448 4 Richard Trotta
449 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
450 4 Richard Trotta
451 35 Stephen Kay
* Discussion luminosity scan analysis (earlier scan) - Richard
452
** 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
453
** Notes on efficiencies in report file:
454
*** DT (EDTM) is not electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS
455
*** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc)
456
*** Tracking efficiency needs to be checked
457
*** 3/4 trigger efficiency seems ok
458
* Discussion luminosity scan analysis (later scan) - Ryan
459
** Fewer carbon runs than earlier scan
460
** Shown is a tracking-based analysis using data from the ROOT trees
461
** First results for carbon, LH2, and LD2, but efficiencies need to be checked
462
* SIDIS analysis - Hem
463
** Shown is a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet to be applied.
464
** Discussion about agreement in z and apparent offset - relation of this offset with spectrometer offset
465
* Analysis of exclusive events in SIDIS - Samip
466
** Shown is a look at the first kaon events in exclusive limit of SIDIS data
467
** Ongoing work on implementing coincidence time into tree
468
* Discussion of run plan, and in particular possible low Q2/low energy
469
** Assume that kaon low Q2=0.4 already included - have kinematics with specified beam energies, if needed
470
** 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
471
** Garth will put this together in a draft email
472
473 12 Richard Trotta
----
474
475 35 Stephen Kay
h2. March 29, 2018
476 12 Richard Trotta
477 35 Stephen Kay
*Links to talks->* "Richard, ":https://redmine.jlab.org/documents/16 "Samip":https://redmine.jlab.org/documents/27
478 13 Richard Trotta
479 35 Stephen Kay
* Details of adding points to fall run plan - will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja)
480
* Luminosity scans (Ryan, Andres, Richard, Pete)
481
* Macros, SIDIS analysis (Hem, Anashe)
482
* Elastic data (TBD)
483
484 14 Richard Trotta
----
485 18 Richard Trotta
486 35 Stephen Kay
h2. February 22, 2018
487 18 Richard Trotta
488 35 Stephen Kay
*Links to talks->* "Andres":https://redmine.jlab.org/documents/19
489 18 Richard Trotta
490 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.
491
* Brief description of Samip's work - working on coincidence timing decoding with JLab staff and re-optimization of kinematics
492
* Discussion of Richard's slides on run plan kinematics and preparations -
493
** 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
494
** 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
495
** for each setting will need 1-2 shifts for calibrations - need to negotiate with other experiments in run group
496
** kinematics plots W-Q2 show that still need to do some optimization
497
** run sheets: include raster size, update coincidence count labeling, and carbon target labeling
498
* Discussion of next meeting. Garth at JLab 8-16 March - might have meeting during that time.
499 26 Richard Trotta
500 35 Stephen Kay
* *Action Items:*
501
** Post slides/notes from this meeting and procedure to set up hcana in Redmine (Tanja)
502
** Update run sheet and kinematic optimization for W/Q2 (Garth)
503
** Circulate elastic calculations for kinematic settings (Samip)
504
** Continue investigation of elastic data and run plan kinematics (Andres/Richard)
505
** Test software installation instructions (Pete)
506
** 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) 
507 32 Stephen Kay
508
----