Project

General

Profile

Kaon LT Meetings » mtg_22may17.txt

Garth Huber, 05/21/2022 01:22 PM

 
1
		May 17/22 PionLT/KaonLT Analysis Meeting Notes
2
                ----------------------------------------------
3
                           (Notes by GH and SJDK)
4

    
5
Please remember to post your slides at:
6
https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings
7

    
8
Present:
9
Regina - Stephen Kay, Garth Huber, Nathan Heinrich, Ali Usman, Muhammad Junaid,
10
         Vijay Kumar, Love Preet
11
CUA  - Richard Trotta, Tanja Horn
12
Ohio - Jacob Murphy, Julie Roche
13
JLab - Dave Gaskell
14

    
15
Richard
16
-------
17
- Updates to efficiencies list script
18
   - purpose is to get a consistent database of information
19
   - grab information from report files and other calculation scripts
20
   - Updated based on discussions/comments with SK/AU
21
- Script to get info will follow soon
22
   - Starting with report file info
23
   - DG - Cherenkov efficiencies should probably not be run by run
24
   - TH - Some info only makes sense for certain settings, construct with sets
25
          of "if" statements
26
   - SK - Should probably have a list of settings, specify run type and
27
          kinematics etc, script will grab info relevant to run type
28
   - AU - Will have different report files for each run type
29
      - HeeP singles/HeeP coin/Prod/Lumi
30
   - SK/GH - Some info can come from runlist.csv file
31
      - SK - Yes, list needs to differentiate between scripts a little,
32
             different versions for different run types, e.g. Heep-Singles,
33
	     Heep-COIN, Lumi, Prod
34
         - RT - Yep, will follow up and specify this in next pass of the list
35

    
36
- HeeP Coin studies
37
   - Sent updated SIMC scripts to Ali
38
   - Wanted to scale up data from last time
39
   - Large SIMC/Data normalization difference
40
      - Input file issue - typo in input file
41
         - Momentum value issue (5 and 3 switched around)
42
      - Improved a little, but some issues still
43
        Note: in slides Blue=SIMC, Red=Data
44
   - Data seems to have a very different shape, seems to have a slope
45
      - JM - You should check that the correct optics matrix is used in SIMC
46
      - AU - Did you fix bug I found?
47
      - RT - Yes I corrected that too
48
   - Some quantities seem to actually look ok?
49
      - Shape of xptar/yptar/delta for the SHMS vastly different
50
      - GH/TH - Are the cuts clean? Are we 100% sure? What are they?
51
   - Seems to be a script issue? Integral seems to be varying between quantities
52
      - GH - *Should show some info demonstrating purity of experimental data,
53
             Pmiss/Emiss plots*
54
         - They are there and look clean
55
         - Need to fix binning?
56
	 - GH - *It is absolutely vital that the Data and SIMC have IDENTICAL
57
                binning, can't rely on ROOT to choose the values, must do them
58
                manually*  
59
         - SK - Need to be careful in controlling bin width
60
   - HMS also looks very different
61
   - Shape and integral look very different
62
      - *Could be a SIMC weighting issue?*
63
   - Had various issues due to python version difference between ifarm and
64
     laptop   
65
     - TH - *Need to focus a little on just using one common system, reduce time
66
            replicating behaviour between different installations*
67
     - GH - Absolutely, vital for progress as a group
68

    
69
- 2 week plan
70
   - fix Heep-COIN Data/MC issues
71
     - Binning issues
72
     - SIMC script updates for Ali
73
   - Efficiencies script first version
74
     - Use Ali's new report files in efficiencies script
75

    
76
Ali
77
---
78
- Updated report file template, gets ~90% of the info RT showed on his list
79
  earlier
80
   - *EDTM numbers still temporary, JM will send update when it's available*
81
   - Naming scheme uses unique naming convention for each variable
82
      - Makes scripts that grab the info here much more useful
83
   - VK - Calorimeter efficiency info?
84
      - DG - Cal eff from hcana isn't great, need a separate script/study of this
85
           - It is useful to have as an online value to keep track if it's
86
             changing or not, guides you to a hardware problem potentially
87
	   - *The issue is that it's hard to get a clean electron sample inside
88
	     hcana.  Need to do a dedicated study to select electrons
89
	   - sometimes have to determine Cal eff from elastics data,
90
	     parameterize and extrapolate to prod data conditions*
91
      - SK - Online version is there and working for this purpose?
92
         - DG - Yes but really only restrict use to a stability/hardware check
93
   - Hodoscope efficiencies are calculated, plane by plane
94
      - DG and Mark Jones pointed out where to look for this and check it's ok
95
      - Current number is more trustworthy
96
   - Added in geometrical cut on the aerogel, tray dependent
97
      - Got numbers for one tray, RT will send the others
98

    
99
- 2 week plan
100
  - Will look at 8.2 and 6.2 GeV hodoscope calibrations
101
  - TH - is your work coordination efficient?  Don't want you to be waiting on
102
         other people to make progress
103
  - AU - not waiting too much on other people right now
104

    
105
Vijay
106
-----
107
- Initial offsets study to improve HeeP coin studies for 3.9 GeV data
108
   - Improved fits and distributions slightly
109
      - DG - What is different between the new/old?
110
      - VK - Updated spectrometer offsets in the SIMC input file, x/y for e/p in
111
             SIMC
112
         - DG - At the FP?
113
         - GH - No, at spectrometer entrance, not the FP
114
	 - DG - change in x gives an effective momentum shift
115
      - VK - Still need to determine momentum offsets
116
      - GH - Q for TH/DG, should offsets only be done after running HeePCoin
117
             program?
118
         - TH - Where did spectrometer offsets come from?
119
         - VK - Just by eye, adjusting them
120
         - TH - *Want to minimise #offsets used*, not clear what offests at
121
	        the minute mean
122
         - DG - *Should in principle start with survey values for the
123
	        spectrometer x,y,zoffsets*
124
	      - shift VJ observed in xfp came from an x-spectrometer offset
125
	        can do instead from a momentum offset, which is more universally
126
		applied to all settings
127
              - Should not be much x offset for either spectrometer, should use
128
	        HeePCheck program following a run with survey values
129
         - TH - Could just start with 0 x,y,z offsets?
130
         - DG - Offsets are correlated
131
              - Probably should not start by adjusting these numbers
132
         - TH - Can't really just make up spectrometer offsets, should start
133
	        from the survey
134
         - DG - *Start with HeeP program, constraining energy/momentum in both
135
	        spectrometers at the same time*
136
              - Got derivatives, these show how much things would change by *if*
137
	        you moved them
138
         - TH - *Be careful with the sign in the output of the HeeP check code*
139
	        e.g. in what direction do you need to change things if you
140
		observe a dW offset of +2 or -2 MeV?
141
            - Code outputs what happens if you shift E/Theta_e/Theta_p/p_e/p_p
142
	      by 1 unit (0.1%)
143
         - Offsets were previously implemented into SIMC
144
         - SIMC input file has no momentum offset, so what do you do if there's
145
	   a momentum offset?
146
            - Set central momentum in SIMC file by corresponding amount
147
         - GH - Change in the data too by changing standard.kinematics?
148
            - DG - *Used to have a kinematics offset file in hcana*
149
	           That makes it easy to track that the correct offsets are
150
		   applied to all of the data
151
            - SK - If this *doesn't* still exist, should be easy to modify hcana
152
	      to find and use this
153
	    - DG - *also need to be careful that SIMC automatically corrects for
154
	           any applied offset to get the correct physics values*
155
         - TH - Need to be careful and avoid double correcting offsets between
156
	        data and SIMC
157
	      - momentum offset was difficult to implement in SIMC.  In Fpi-2
158
	        analysis, TH/DG had to make changes to the SIMC code to do this
159
              - *students should consult DG/TH if there is a need to do this*
160

    
161
- 2 week plan
162
  - redo offsets, start to include effs in Heep-singles, Heep-coin analysis
163

    
164
Jacob
165
-----
166
- RT, *need to be careful when looking at 6.59 GeV/C HMS data (10.6 GeV, 09/18,
167
  NMR value drifting, hence central momentum drifting)*
168
   - Run numbers 4805 - 4825, Sept 29/18
169

    
170
- SHMS defocused hodoscope calibrations
171
   - September 2021 defocused run, 11799
172
   - Defocused has slightly larger wiggle in the xfp/yfp vs beta plots
173
     - quantitative measure of calib effectiveness is sigma_beta
174
     - DM says ~0.028 is good
175
   - NH - MJ says can keep time walk corr fixed & adjust velocity param
176
     - Defocused run seems to perform very well over ~4 months of data
177

    
178
- Should be done on run plan soon
179

    
180
- 2 week plan
181
   - Improvement on switching velocity parameters only to see if further
182
     improvement
183
   - Hodoscope fitting method for velocity - deep dive
184
   - Finish up run plan
185

    
186
- AU - Batch script for hodoscope calibrations
187
   - JM - Yes it's ready, will push it, should work for KaonLT fine
188
      - *May need to make PID cut changes for time walk and velocity scripts*
189

    
190
Junaid
191
------
192
- Working on the run plan, 6 lumi scans, 2 for each beam energy
193
  - Updated HeeP, expected charge and #pions
194
  - Almost done with latex file for shift worker document
195

    
196
- Working on calorimeter calibrations
197
   - using Bill Henry's code
198
   - c-library issue, unclear where this is or how to get it
199
      - Grab from cdaq? Assuming it works fine on cdaq
200

    
201
- 2 week plan
202
   - Finish run plan
203
     - 4 HeepCoin settings for some energies, one has a very high max SHMS angle
204
     - Max angle is 37.95 now, just fits within max remote operation range
205
      - DG - Any crazy large angles needed on the HMS side?
206
         - NH - Goes to ~42 degrees max
207
         - GH - CaFe goes to ~67 degrees max so we're nowhere near
208
   - DC and calorimeter calibration offline updates
209

    
210
Nathan
211
------
212
- Working on run plan too, finished a draft of the SW instructions for 6.4 GeV,
213
  distributed
214
  
215
- Not looked at calibrations much yet
216
   - Comprehensive exam prep
217
   - Did replay some physics settings, so could check Cherenkov calibrations
218
     quite quickly
219
     
220
- 2 week plan
221
   - Run plan should be done
222
   - Cherenkov calibrations - First pass
223
      - NGC script not working?
224
      - JM - Script is very simlar to HGC code, should be roughly working, need
225
        to get geometry of mirrors and NGC position in there and correct
226
         - Does it have a 5cm vertical offset like the HGC?  GH doesn't think so
227

    
228
GH comment on pdf for shift workers (SW)
229
   - In spreadsheet, diamond cut applied, NOT on SW document
230
   - *SW needs nominal online cuts w/o diamond so that SW/RC know when to move to
231
     next setting*
232
   - For settings where spreadsheet lists two model values, Use the more
233
     pessimistic model for timings on the run plan document
234

    
235
Next Meeting - 22-May-31 at 15:00 EDT
236
  
(51-51/412)