Kaon LT Meetings » History » Revision 35
Revision 34 (Stephen Kay, 06/03/2019 01:52 PM) → Revision 35/807 (Stephen Kay, 06/03/2019 01:57 PM)
{{>toc}}
h1. *Kaon LT Meetings*
----
h2. June 4, 2019 February 22, 2018
*Links to talks->* "Stephen":https://redmine.jlab.org/documents/56 "Andres":https://redmine.jlab.org/documents/19
----
h2. May 21, 2019
*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
----
h2. May 14, 2019
*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
----
h2. April 30, 2019
*Links to talks->* "Richard":https://redmine.jlab.org/documents/45 "Richard's * Discussion of Andres' slides on elastic W calculation 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
----
h2. February 4, 2019
*Links hcana - initial issue with negative W values seems to talks->* "Richard":https://redmine.jlab.org/documents/43 "Stephen":https://redmine.jlab.org/documents/44
----
h2. August 21, 2018
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
----
h2. August 8, 2018
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
----
h2. August 3, 2018
*Ongoing Tasks->* #381 #382 #383
*Links be due to talks->*
----
h2. July 11, 2018
*Ongoing Tasks->* #381 #382 #383 #384
*Action items:*
* Update run plan, e.g. add prescales (Garth) outdated information in standard.kinematics file. Additional investigation ongoing.
* Check Brief description of Samip's work - working on details of: magnet cycling procedure, minimum angles, MCC fringe field steering, beam energy measurements, optics checks (Tanja) coincidence timing decoding with JLab staff and re-optimization of kinematics
* Identify additional Discussion of Richard's slides on run coordinators (Tanja) plan kinematics and preparations -
* Encourage collaborators ** everyone agrees that in general want to take shifts, e.g. FIU (Pete) have as many L/T cross section separations as possible in a robust run plan balancing statistics vs. systematics
* Draft email about shifts etc. ** before actual run may want to collaboration (Tanja)
* Develop diagnostic scripts and kaonLT specific (Richard, Ryan)
* Continue documentation development, e.g. checklist, shift taker instructions, HowTo or link do a 3D optimization in all kinematic variables to generic Hall C HowTo, task list, web page (Richard, Garth)
*Discussions:*
* SHMS Aerogel Cherenkov: tray has been changed to SP-11 on 10 July, nominal time get the best possible delta(epsilon) for change is 8 hours, one tray can stay in the hall to minimize overhead L/T separations
* HGC: waiting ** for re-installation
* Trigger checkout: main items each setting will need 1-2 shifts for calibrations - need to keep negotiate with other experiments in mind: fADC thresholds, timing HMS/SHMS - leading arm, possible rate limitations run group
* Shifts ** kinematics plots W-Q2 show that still need to do some optimization
* Diagnostics scripts ** run sheets: include raster size, update coincidence count labeling, and documentation carbon target labeling
* Personnel schedules Discussion of next meeting. Garth at JLab 8-16 March - might have meeting during that time.
----
h2. June 28, 2018
*Links to talks->* "Richard":https://redmine.jlab.org/documents/34
* *Action Items:*
* Develop
** Post slides/notes from this meeting and post shift schedule. Send out request. Find out who is KAONLT liaison procedure to set up hcana in Redmine (Tanja)
* Contact potential ** Update run coordinators. (Tanja)
* Aerogel tray exchange for start of experiment sheet and coordination of future exchanges (Vladimir)
* Update runplan and prepare documents needed kinematic optimization for shift crew, e.g. run sheets W/Q2 (Garth)
* Set up a web page to collect ** Circulate elastic calculations for kinematic settings (Samip)
** Continue investigation of elastic data and link from Redmine - How-To documents, initial calibrations, etc. (Garth, Richard)
* 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)
* Develop trigger/detector checkout plan (Tanja, initial draft) kinematics (Andres/Richard)
** Are all experts available at run start, experts needed: coincidence timing , Harp Scans, BCM calibrations, ... Test software installation instructions (Pete)
* Find out from ** Draft email to JLab what the anticipated settings are management about need for limit switches for both spectrometers and for separation small angle in between them. Also find out what magnet cycling procedure should be used beam pipe - need to have HMS minimum angle of less than 13 degrees for kaon L/T quality separation data separations (Tanja)
* Find out if all aerogel trays needed for experiment can be stored inside Hall C to avoid having to open truck ramp (Vladimir)
----
*Analysis Updates:* h2. March 29, 2018
* Ryan
** resolving differences between his analysis and Richard's *Links to talks->* "Richard, ":https://redmine.jlab.org/documents/16 "Samip":https://redmine.jlab.org/documents/27
* Richard
** 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 Details of adding points would be most sensitive, is planning to also double-check the BCM calibration procedure fall run plan - had discussion with Dave Mack at JLab will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja)
** Presents a script developed for luminosity * 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. (Ryan, Andres, Richard, Pete)
* Macros, SIDIS analysis (Hem, Anashe)
* Elastic data (TBD)
----
h2. May 31, April 26, 2018
*Links to talks->* "Samip":https://redmine.jlab.org/documents/30 "Richard,":https://redmine.jlab.org/documents/18 "Ryan, ":https://redmine.jlab.org/documents/20 "Samip":https://redmine.jlab.org/documents/25
----
h2. May 17, 2018
*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
* Luminosity scans (Richard, Ryan) Discussion luminosity scan analysis (earlier scan) - Richard
** Carbon scan Shown is a scaler-based analysis using scalers from April seems consistent with no boiling, LH2 report file and LD2 show deviation from unity, should check effect of EDTM events ROOT tree - the values are different, why that is has to be checked
** Notes on efficiencies in report file:
** Carbon scans from January (low rates) have large deviations from unity, in particular behavior at higher currents (>40uA), e.g. cpu dead time, that *** DT (EDTM) is not yet understood electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS
** discussion about pre-scale factors
*** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc)
*** Tracking efficiency needs to be checked
*** 3/4 trigger efficiency seems ok
* Discussion about Richard's script extracting and printing information luminosity scan analysis (later scan) - Ryan
** Fewer carbon runs than earlier scan
** Shown is a tracking-based analysis using data from report files and the ROOT trees including histograms
** Add option First results for looking at yields with cuts on cointime, target window, carbon, LH2, and missing mass LD2, but efficiencies need to be checked
** Add option to look at real peak vs. background level
* H(e,e'p) kinematics investigation for fall run (Samip) SIDIS analysis - Hem
** Optimal range Shown is between electron angles of 17-20 degrees, time required ranges from ~1 hour at 17 degrees a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet to ~3 hour at 20 degrees, other angles may be applied.
** Discussion about agreement in z and apparent offset - relation of interest for disentangling charge and current dependent effects
this offset with spectrometer offset
* *Action Items* Analysis of exclusive events in SIDIS - Samip
** Luminosity scans Shown is a look at the first kaon events in exclusive limit of SIDIS data
** Ongoing work on implementing coincidence time into tree
* Discussion of run plan, and in particular possible low rates from January (Richard) Q2/low energy
** Luminosity scans from April Assume that kaon low Q2=0.4 already included - have kinematics with corrected efficiencies, e.d. DT (Ryan) specified beam energies, if needed
** H(e,e'p) For pion form factor and H(e,e') kinematics for upcoming Kaon LT run (Samip) 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
** Kaon LT detailed run plan (Garth, Pete, Tanja)
** Preparations, e.g. report files, diagnostic histograms and real time monitoring, shift worker instructions, optimization of trees (all) Garth will put this together in a draft email
----
h2. May 10, 2018
*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
* Luminosity Scans January 2018 (Richard)
** Tracking-based analysis for Runs 1415-1423, .. for now focus on HMS, typical HMS S1X rates are <
** Cuts applied: PID for electrons (Cer, Cal), acceptance (delta)
** Efficiency calculation was investigated in detail and applied using scalers from trees
** Results for carbon (normalized to 30uA) show large variation - need to understand
** *Next steps:*
*** Double check calculation of computer lifetime, look for differences in TRIG and PRETRIG scalers
*** Check stability of pre-scale (Ryan saw changes within runs)
*** Check if detector calibrations for runs are implemented correctly
*** Analyze with Ryan's cuts
* Luminosity Scans April 2018 (Ryan)
** Confirms Richard's earlier finding that scaler-based analysis is not reliable and that it's best to analyze event-by-event
** Tracking-based analysis for runs 2073-2095
** Cuts applied: PID for electrons (TOF, Cal, Chi2), acceptance (delta and angles), BCM4a
** Included most recent detector calibrations in replay of these runs
** Efficiencies from report file mainly, may need to update tracking efficiency implementation
** Found that calculations of computer deadtime requires different set of scalers for runs from January to those from April 2018
** Results show carbon yields consistent with unity within error (0.5% error bars), and boiling for hydrogen and deuterium
** *Next steps:*
*** Check tracking efficiency
* *Global comments on Luminosity Scans (so far)*
** 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.
** Efficiencies in report files need to be updated, e.g. CPU deadtime (Richard)
** Check if BCM4a is the one closest to the target - get a map of the hall (Richard, Ryan)
** Uncertainties on current
** Detector calibrations
** HMS vs. SHMS
* eK+ coincidence time from SIDIS Spring 2018 run (Samip)
** Worked with Mark Jones on coincidence time calculation - now available in hcana (see Samip's 10 May 2018 email for more details)
** runs used in this analysis: 3423 with Q2=3.1 GeV2 and W=2.78 GeV
** Coincidence time spectrum shows peak separations >2 ns corresponding to different accelerator frequency
** Missing mass spectra: Kaon peak clearly visible, also see pions even after cuts
** Found that pions appear localized in phase space - seems to be due to end point in kinematic phase space
** *Next steps:*
*** Look for a run with kaon momentum closer to 3 GeV/c (aerogel threshold is ~3 GeV/c for kaons for n=1.015)
* Yield normalized ratios from SIDIS (Hem)
** Yield ratios of data to MC match well in shape, but normalization seems not quite right
** *Next steps:*
*** Check if efficiencies, currents, run time etc. are taken into account correctly
----
h2. April 26, May 17, 2018
*Links to talks->* "Richard,":https://redmine.jlab.org/documents/18 "Ryan, ":https://redmine.jlab.org/documents/20 "Samip":https://redmine.jlab.org/documents/25 "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
* Discussion luminosity scan analysis (earlier scan) - Richard Luminosity scans (Richard, Ryan)
** Shown is a scaler-based analysis using scalers Carbon scan from report file April seems consistent with no boiling, LH2 and LD2 show deviation from ROOT tree - the values are different, why that is has to be checked unity, should check effect of EDTM events on efficiencies
** Notes on efficiencies Carbon scans from January (low rates) have large deviations from unity, in report file:
*** DT (EDTM) particular behavior at higher currents (>40uA), e.g. cpu dead time, that is not electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS yet understood
*** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc)
*** Tracking efficiency needs to be checked
*** 3/4 trigger efficiency seems ok
** discussion about pre-scale factors
* Discussion luminosity scan analysis (later scan) - Ryan
** Fewer carbon runs than earlier scan
** Shown is a tracking-based analysis using data about Richard's script extracting and printing information from the ROOT report files and trees including histograms
** First results Add option for carbon, LH2, looking at yields with cuts on cointime, target window, and LD2, but efficiencies need missing mass
** Add option to be checked
look at real peak vs. background level
* SIDIS analysis - Hem H(e,e'p) kinematics investigation for fall run (Samip)
** Shown Optimal range is a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet 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 applied.
** Discussion about agreement in z of interest for disentangling charge and apparent offset - relation of this offset with spectrometer offset
current dependent effects
* Analysis of exclusive events in SIDIS - Samip *Action Items*
** Shown is a look Luminosity scans at the first kaon events in exclusive limit of SIDIS data low rates from January (Richard)
** Ongoing work on implementing coincidence time into tree Luminosity scans from April with corrected efficiencies, e.d. DT (Ryan)
* Discussion of ** H(e,e'p) and H(e,e') kinematics for upcoming Kaon LT run plan, and in particular possible low Q2/low energy (Samip)
** Assume that kaon low Q2=0.4 already included - have kinematics with specified beam energies, if needed Kaon LT detailed run plan (Garth, Pete, Tanja)
** For pion form factor Preparations, e.g. report files, diagnostic histograms 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
** Garth will put this together in a draft email real time monitoring, shift worker instructions, optimization of trees (all)
----
h2. March 29, May 31, 2018
*Links to talks->* "Richard, ":https://redmine.jlab.org/documents/16 "Samip":https://redmine.jlab.org/documents/27 "Samip":https://redmine.jlab.org/documents/30
* Details of adding points to fall run plan - will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja)
* Luminosity scans (Ryan, Andres, Richard, Pete)
* Macros, SIDIS analysis (Hem, Anashe)
* Elastic data (TBD)
----
h2. February 22, June 28, 2018
*Links to talks->* "Andres":https://redmine.jlab.org/documents/19 "Richard":https://redmine.jlab.org/documents/34
*Action Items:*
* 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. Develop and post shift schedule. Send out request. Find out who is KAONLT liaison (Tanja)
* Brief description Contact potential run coordinators. (Tanja)
* Aerogel tray exchange for start of Samip's work - working on coincidence timing decoding with JLab staff experiment and re-optimization coordination of kinematics future exchanges (Vladimir)
* Discussion of Richard's slides on Update runplan and prepare documents needed for shift crew, e.g. run plan kinematics sheets (Garth)
* Set up a web page to collect and preparations link from Redmine - How-To documents, initial calibrations, etc. (Garth, Richard)
** everyone agrees that in general want * Adapt luminosity scan script to have as many L/T cross section separations as possible in a robust calculate kaon yields by run number for use during experiment by shift crew - has to be simple to use. (Richard)
* Develop trigger/detector checkout plan balancing statistics vs. systematics (Tanja, initial draft)
** before actual Are all experts available at run may want to do a 3D optimization in all kinematic variables to get start, experts needed: coincidence timing , Harp Scans, BCM calibrations, ...
* Find out from JLab what the best possible delta(epsilon) anticipated settings are for the 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 separations quality separation data (Tanja)
* Find out if all aerogel trays needed for experiment can be stored inside Hall C to avoid having to open truck ramp (Vladimir)
*Analysis Updates:*
* Ryan
** for each setting will need 1-2 shifts for resolving differences between his analysis and Richard's
* Richard
** 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 - need currently working on fixing that, presents current results - low curent point is ~10% below unity, discussion that this seems to negotiate 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 other experiments in run group Dave Mack at JLab
** kinematics plots W-Q2 show Presents a script developed for luminosity scans that still need to do some optimization
** determines yields for a run sheets: include raster size, update coincidence count labeling, and carbon target labeling
* number input on command line. Discussion of next meeting. Garth at JLab 8-16 March - might have meeting this could be good to adapt for kaon counting during that time. experiment.
----
h2. July 11, 2018
*Ongoing Tasks->* #381 #382 #383 #384
*Action items:*
* *Action Items:*
** Post slides/notes from this meeting and procedure to set up hcana in Redmine (Tanja)
** Update run sheet and kinematic optimization for W/Q2 plan, e.g. add prescales (Garth)
** Circulate elastic calculations for kinematic settings (Samip) * Check on details of: magnet cycling procedure, minimum angles, MCC fringe field steering, beam energy measurements, optics checks (Tanja)
** Continue investigation of elastic data and * Identify additional run plan kinematics (Andres/Richard) coordinators (Tanja)
** Test software installation instructions * Encourage collaborators to take shifts, e.g. FIU (Pete)
** * Draft email about shifts etc. to JLab management about need collaboration (Tanja)
* Develop diagnostic scripts and kaonLT specific (Richard, Ryan)
* Continue documentation development, e.g. checklist, shift taker instructions, HowTo or link to generic Hall C HowTo, task list, web page (Richard, Garth)
*Discussions:*
* SHMS Aerogel Cherenkov: tray has been changed to SP-11 on 10 July, nominal time for small angle beam pipe change is 8 hours, one tray can stay in the hall to minimize overhead
* HGC: waiting for re-installation
* Trigger checkout: main items to keep in mind: fADC thresholds, timing HMS/SHMS - need leading arm, possible rate limitations
* Shifts
* Diagnostics scripts and documentation
* Personnel schedules
----
h2. August 3, 2018
*Ongoing Tasks->* #381 #382 #383
*Links to have HMS minimum angle of less than 13 degrees for kaon L/T separations (Tanja)
talks->*
----
h2. August 8, 2018
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
----
h2. August 21, 2018
*Ongoing Tasks->* #381 #382 #383 #404 #405 #406
----
h2. February 4, 2019
*Links to talks->* "Richard":https://redmine.jlab.org/documents/43 "Stephen":https://redmine.jlab.org/documents/44
----
h2. April 30, 2019
*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
----
h2. May 14, 2019
*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
----
h2. May 21, 2019
*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
----
h2. June 4, 2019
*Links to talks->* "Stephen":https://redmine.jlab.org/documents/56
----