Project

General

Profile

Kaon LT Meetings » History » Version 53

Garth Huber, 06/18/2019 12:40 PM

1 1 Richard Trotta
{{>toc}}
2
3
h1. *Kaon LT Meetings*
4
5 41 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 2 Richard Trotta
----
8
9 42 Stephen Kay
h2. June 14, 2019
10
11 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
12 52 Garth Huber
13 46 Richard Trotta
14 42 Stephen Kay
----
15
16 35 Stephen Kay
h2. June 4, 2019
17 1 Richard Trotta
18 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
19 36 Vijay Kumar
20 1 Richard Trotta
21 35 Stephen Kay
----
22 1 Richard Trotta
23 35 Stephen Kay
h2. May 21, 2019
24 1 Richard Trotta
25 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
26
27 1 Richard Trotta
----
28
29 35 Stephen Kay
h2. May 14, 2019
30 1 Richard Trotta
31 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
32 1 Richard Trotta
33
----
34
35 35 Stephen Kay
h2. April 30, 2019
36 1 Richard Trotta
37 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
38 1 Richard Trotta
39
----
40
41 35 Stephen Kay
h2. February 4, 2019
42 1 Richard Trotta
43 35 Stephen Kay
*Links to talks->* "Richard":https://redmine.jlab.org/documents/43 "Stephen":https://redmine.jlab.org/documents/44
44 1 Richard Trotta
45 35 Stephen Kay
----
46 1 Richard Trotta
47 35 Stephen Kay
h2. August 21, 2018
48 1 Richard Trotta
49 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
50 1 Richard Trotta
51 35 Stephen Kay
----
52 1 Richard Trotta
53 35 Stephen Kay
h2. August 8, 2018
54 1 Richard Trotta
55 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
56
57 1 Richard Trotta
----
58
59 35 Stephen Kay
h2. August 3, 2018
60 1 Richard Trotta
61 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383
62
*Links to talks->*
63 1 Richard Trotta
64 35 Stephen Kay
----
65 1 Richard Trotta
66 35 Stephen Kay
h2. July 11, 2018
67 1 Richard Trotta
68 35 Stephen Kay
*Ongoing Tasks->* #381 #382 #383 #384
69 1 Richard Trotta
70 35 Stephen Kay
*Action items:*
71 1 Richard Trotta
72 35 Stephen Kay
* Update run plan, e.g. add prescales (Garth)
73
* Check on details of: magnet cycling procedure, minimum angles, MCC fringe field steering, beam energy measurements, optics checks (Tanja)
74
* Identify additional run coordinators (Tanja)
75
* Encourage collaborators to take shifts, e.g. FIU (Pete)
76
* Draft email about shifts etc. to collaboration (Tanja)
77
* Develop diagnostic scripts and kaonLT specific (Richard, Ryan)
78
* Continue documentation development, e.g. checklist, shift taker instructions, HowTo or link to generic Hall C HowTo, task list, web page (Richard, Garth)
79 1 Richard Trotta
80 35 Stephen Kay
*Discussions:*
81 1 Richard Trotta
82 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
83
* HGC: waiting for re-installation
84
* Trigger checkout: main items to keep in mind: fADC thresholds, timing HMS/SHMS - leading arm, possible rate limitations
85
* Shifts
86
* Diagnostics scripts and documentation
87
* Personnel schedules
88 1 Richard Trotta
89
----
90
91
h2. June 28, 2018
92
93
*Links to talks->* "Richard":https://redmine.jlab.org/documents/34
94
95
*Action Items:*
96
97
* Develop and post shift schedule. Send out request. Find out who is KAONLT liaison (Tanja)
98
* Contact potential run coordinators. (Tanja)
99
* Aerogel tray exchange for start of experiment and coordination of future exchanges (Vladimir)
100
* Update runplan and prepare documents needed for shift crew, e.g. run sheets (Garth)
101
* Set up a web page to collect and link from Redmine - How-To documents, initial calibrations, etc. (Garth, Richard)
102
* 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)
103
* Develop trigger/detector checkout plan (Tanja, initial draft)
104
** Are all experts available at run start, experts needed: coincidence timing , Harp Scans, BCM calibrations, ...
105
* 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)
106
* Find out if all aerogel trays needed for experiment can be stored inside Hall C to avoid having to open truck ramp (Vladimir)
107
108
*Analysis Updates:*
109
110
* Ryan 
111
** resolving differences between his analysis and Richard's
112
113
* Richard
114
** 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
115
** 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.
116
117
----
118
119 35 Stephen Kay
h2. May 31, 2018
120 1 Richard Trotta
121 35 Stephen Kay
*Links to talks->* "Samip":https://redmine.jlab.org/documents/30
122 1 Richard Trotta
123 35 Stephen Kay
----
124 1 Richard Trotta
125 35 Stephen Kay
h2. May 17, 2018 
126 1 Richard Trotta
127 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
128 2 Richard Trotta
129 35 Stephen Kay
* Luminosity scans (Richard, Ryan)
130
** Carbon scan from April seems consistent with no boiling, LH2 and LD2 show deviation from unity, should check effect of EDTM events on efficiencies
131
** 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
132
** discussion about pre-scale factors
133 1 Richard Trotta
134 35 Stephen Kay
* Discussion about Richard's script extracting and printing information from report files and trees including histograms
135
** Add option for looking at yields with cuts on cointime, target window, and missing mass
136
** Add option to look at real peak vs. background level
137 1 Richard Trotta
138 35 Stephen Kay
* H(e,e'p) kinematics investigation for fall run (Samip)
139
** 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
140 1 Richard Trotta
141 35 Stephen Kay
* *Action Items*
142
** Luminosity scans at low rates from January (Richard)
143
** Luminosity scans from April with corrected efficiencies, e.d. DT (Ryan)
144
** H(e,e'p) and H(e,e') kinematics for upcoming Kaon LT run (Samip)
145
** Kaon LT detailed run plan (Garth, Pete, Tanja)
146
** Preparations, e.g. report files, diagnostic histograms and real time monitoring, shift worker instructions, optimization of trees (all)
147 1 Richard Trotta
148
----
149
150 35 Stephen Kay
h2. May 10, 2018
151 1 Richard Trotta
152 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
153 2 Richard Trotta
154 35 Stephen Kay
* Luminosity Scans January 2018 (Richard)
155
** Tracking-based analysis for Runs 1415-1423, .. for now focus on HMS, typical HMS S1X rates are <
156
** Cuts applied: PID for electrons (Cer, Cal), acceptance (delta)
157
** Efficiency calculation was investigated in detail and applied using scalers from trees
158
** Results for carbon (normalized to 30uA) show large variation - need to understand
159
** *Next steps:*
160
*** Double check calculation of computer lifetime, look for differences in TRIG and PRETRIG scalers
161
*** Check stability of pre-scale (Ryan saw changes within runs)
162
*** Check if detector calibrations for runs are implemented correctly
163
*** Analyze with Ryan's cuts
164 1 Richard Trotta
165 35 Stephen Kay
* Luminosity Scans April 2018 (Ryan)
166
** Confirms Richard's earlier finding that scaler-based analysis is not reliable and that it's best to analyze event-by-event
167
** Tracking-based analysis for runs 2073-2095
168
** Cuts applied: PID for electrons (TOF, Cal, Chi2), acceptance (delta and angles), BCM4a
169
** Included most recent detector calibrations in replay of these runs
170
** Efficiencies from report file mainly, may need to update tracking efficiency implementation
171
** Found that calculations of computer deadtime requires different set of scalers for runs from January to those from April 2018
172
** Results show carbon yields consistent with unity within error (0.5% error bars), and boiling for hydrogen and deuterium
173
** *Next steps:*
174
*** Check tracking efficiency
175 5 Richard Trotta
176 35 Stephen Kay
* *Global comments on Luminosity Scans (so far)*
177
** 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.
178
** Efficiencies in report files need to be updated, e.g. CPU deadtime (Richard)
179
** Check if BCM4a is the one closest to the target - get a map of the hall (Richard, Ryan)
180
** Uncertainties on current
181
** Detector calibrations
182
** HMS vs. SHMS
183 1 Richard Trotta
184 35 Stephen Kay
* eK+ coincidence time from SIDIS Spring 2018 run (Samip)
185
** Worked with Mark Jones on coincidence time calculation - now available in hcana (see Samip's 10 May 2018 email for more details)
186
** runs used in this analysis: 3423 with Q2=3.1 GeV2 and W=2.78 GeV
187
** Coincidence time spectrum shows peak separations >2 ns corresponding to different accelerator frequency
188
** Missing mass spectra: Kaon peak clearly visible, also see pions even after cuts
189
** Found that pions appear localized in phase space - seems to be due to end point in kinematic phase space
190
** *Next steps:*
191
*** Look for a run with kaon momentum closer to 3 GeV/c (aerogel threshold is ~3 GeV/c for kaons for n=1.015)
192 2 Richard Trotta
193 35 Stephen Kay
* Yield normalized ratios from SIDIS (Hem)
194
** Yield ratios of data to MC match well in shape, but normalization seems not quite right
195
** *Next steps:*
196
*** Check if efficiencies, currents, run time etc. are taken into account correctly
197 4 Richard Trotta
198
----
199
200 35 Stephen Kay
h2. April 26, 2018
201 4 Richard Trotta
202 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
203 4 Richard Trotta
204 35 Stephen Kay
* Discussion luminosity scan analysis (earlier scan) - Richard
205
** 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
206
** Notes on efficiencies in report file:
207
*** DT (EDTM) is not electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS
208
*** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc)
209
*** Tracking efficiency needs to be checked
210
*** 3/4 trigger efficiency seems ok
211
* Discussion luminosity scan analysis (later scan) - Ryan
212
** Fewer carbon runs than earlier scan
213
** Shown is a tracking-based analysis using data from the ROOT trees
214
** First results for carbon, LH2, and LD2, but efficiencies need to be checked
215
* SIDIS analysis - Hem
216
** Shown is a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet to be applied.
217
** Discussion about agreement in z and apparent offset - relation of this offset with spectrometer offset
218
* Analysis of exclusive events in SIDIS - Samip
219
** Shown is a look at the first kaon events in exclusive limit of SIDIS data
220
** Ongoing work on implementing coincidence time into tree
221
* Discussion of run plan, and in particular possible low Q2/low energy
222
** Assume that kaon low Q2=0.4 already included - have kinematics with specified beam energies, if needed
223
** 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
224
** Garth will put this together in a draft email
225
226 12 Richard Trotta
----
227
228 35 Stephen Kay
h2. March 29, 2018
229 12 Richard Trotta
230 35 Stephen Kay
*Links to talks->* "Richard, ":https://redmine.jlab.org/documents/16 "Samip":https://redmine.jlab.org/documents/27
231 13 Richard Trotta
232 35 Stephen Kay
* Details of adding points to fall run plan - will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja)
233
* Luminosity scans (Ryan, Andres, Richard, Pete)
234
* Macros, SIDIS analysis (Hem, Anashe)
235
* Elastic data (TBD)
236
237 14 Richard Trotta
----
238 18 Richard Trotta
239 35 Stephen Kay
h2. February 22, 2018
240 18 Richard Trotta
241 35 Stephen Kay
*Links to talks->* "Andres":https://redmine.jlab.org/documents/19
242 18 Richard Trotta
243 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.
244
* Brief description of Samip's work - working on coincidence timing decoding with JLab staff and re-optimization of kinematics
245
* Discussion of Richard's slides on run plan kinematics and preparations -
246
** 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
247
** 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
248
** for each setting will need 1-2 shifts for calibrations - need to negotiate with other experiments in run group
249
** kinematics plots W-Q2 show that still need to do some optimization
250
** run sheets: include raster size, update coincidence count labeling, and carbon target labeling
251
* Discussion of next meeting. Garth at JLab 8-16 March - might have meeting during that time.
252 26 Richard Trotta
253 35 Stephen Kay
* *Action Items:*
254
** Post slides/notes from this meeting and procedure to set up hcana in Redmine (Tanja)
255
** Update run sheet and kinematic optimization for W/Q2 (Garth)
256
** Circulate elastic calculations for kinematic settings (Samip)
257
** Continue investigation of elastic data and run plan kinematics (Andres/Richard)
258
** Test software installation instructions (Pete)
259
** 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) 
260 32 Stephen Kay
261
----