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EPD Meetings

Updated on Wed, 2021-10-27 22:02 by rjreed. Originally created by sprastar on 2017-02-17 11:18. Under:


EPD Meetings
Thursdays 08:30 (BNL time)

Meeting Zoom

 https://lehigh.zoom.us/j/93334661391?pwd=b1hpY3lPK3hPM0tCM2d0YUZOYk96UT09




Meeting 27 October 2021 (830 am EST)
  1. Run 22 EPD install
  2. Operations Run 22
  3. Calibration progress
  4. 19.6 GeV production issues?
  5. AOB
     
Meeting 12 August 2021 (830 am EST)
  1. EPD Small Systems - Jordan Cory - drupal.star.bnl.gov/STAR/system/files/Cory%20EPD%20Meeting%208-12.pdf
  2. Calibrations
  3. AOB


Meeting 1 July 2021 (830 am EST)
  1. EPD Removal Plan
  2. Calibrations
  3. AOB

Meeting 3 June 2021 (830 am EST)
  1. EPD Current Status
  2. Calibrations
  3. AOB


Meeting 13 May 2021 (830 am EST)
  1. EPD EQ3 Issues and OO Running - drupal.star.bnl.gov/STAR/system/files/RReedEPD05132021.pdf
  2. EPD EP Resolution
  3. Calibrations
  4. AOB

Meeting 6 May 2021 (830 am EST)
  1. dN/dphi - Xiaoyu - drupal.star.bnl.gov/STAR/system/files/EPD05062021.pdf
  2. Run 21 Calibrations
  3. Run 21 OO Running
  4. AOB


Meeting 11 March 2021 (830 am EST)
  1. Beamline Offset - Xiaoyu
  2. Run 21 -
  3. AOB


Meeting 4 March 2021 (830 am EST)
  1. Simulation - Mate
  2. Run 21 -
  3. AOB


Meeting 24 FEB 2021 (830 am EST)
  1. Run 21 issues
  2. Calibrations
  3. Beamline offsets, etc
  4. AOB

Meeting 11 FEB 2021 (830 am EST)
  1. Calibrations
  2. Beamline offsets, etc
  3. Run 21
  4. Simulations
  5. AOB

Meeting 14 Jan 2021 (830 am EST)
  1. FCS Splitter? (5 ns vs 2 ns?)
  2. Calibrations
  3. Run 21 - drupal.star.bnl.gov/STAR/blog/rjreed/epd-install-calibration-and-commissioning-run-21
  4. Calibrations - www.star.bnl.gov/~mcsanad/epd/dNdEta_summary_2021jan14.pdf
  5. AOB


Meeting 3 Dec 2020 (830 am EST)
  1. Calibrations
    1. Ding: drupal.star.bnl.gov/STAR/blog/dchen/epd-calibration-run20-77-gev-fxt
    2. Skipper: drupal.star.bnl.gov/STAR/system/files/Kagamaster_12_3_2020.pdf
  2. Run 21
    1. To-dos - Bad channels/boards?  Calibrations during Run?
  3. AOB


Meeting 12 Nov 2020 (830 am EST)
  1. Calibrations
  2. Centrality at 7.7 GeV
  3. Run 21
    1. Signals to FCS DEP -> Which FEE?
  4. AOB


Meeting 1 Oct 2020 (830 am EST)
  1. EPD removal
  2. Calibrations
  3. Run 21
  4. AOB
Meeting 17 Sept 2020 (830 am EST)

  1. Calibrations
    1. Skipper - drupal.star.bnl.gov/STAR/system/files/EPD_Calibration_09_17_2020.pdf
    2. Ding -  drupal.star.bnl.gov/STAR/system/files/dchen_0917_run19_7p7_calibration_3.pdf
  2. Conclusion of Run 20
  3. Run 21
  4. Rosi - Some 7.7 GeV fun drupal.star.bnl.gov/STAR/system/files/RReed09172020.pdf

Meeting 30 July 2020 (830 am EST)
  1. Mate - Extracting dNch/deta - drupal.star.bnl.gov/STAR/blog/mcsanad/extracting-dnchdeta-epd-data
  2. Skipper - calibration status

Meeting 25 June 2020 (830 am EST)
  1. Rosi - Pedestal and Vped issues - drupal.star.bnl.gov/STAR/blog/rjreed/epd-pedestal-issue-access
  2. Ding - v1 at 7.2 GeV FXT - drupal.star.bnl.gov/STAR/system/files/psi_1_EPD_and_v1_eta_in_FXT_Au_Au_collision_7.2%20GeV.pdf
  3. Cameron - 9.2 GeV calibration issues - drupal.star.bnl.gov/STAR/system/files/CameronRacz_CalibIssues.pdf
  4. Skipper 14.5 GeV calibration - drupal.star.bnl.gov/STAR/system/files/EPD_14p5_Calibration_06_24_2020.pdf




Meeting 11 June 2020 (830 am EST)

  1. EPD LV power supply turn on procedure: https://drupal.star.bnl.gov/STAR/system/files/EPD_Turn_ON_PS.pdf


Meeting 28 May 2020 (830 am EST)


Meeting 21 May 2020 (830 am EST)

Meeting 8 May 2020 (830 am EST)
  • Skipper - Centrality measures in the BES with the EPD
  • Roland/Mate - simulation/unfolding status
  • Skipper/Ding - calibration

Meeting 24 April 2020 (830 am EST)
Meeting 17 April 2020 (830 am EST)

Meeting 10 April 2020 (830 am EST)
  • Potential RHIC re-start 2020 – Rosi & Mike
  • Simulation status – Roland
  • Calibration –  Skipper & Ding  (if any report)
  • Repair of the Y-piece – Joey
  • dN/deta status (if time) – Mike


Meeting 3 April 2020 (830 am EST)
  • Simulation Status - Roland, Mate
  • Calibrations and database - Skipper and team
  • fixing Y splitters (anything left to discuss?) - Joey

Meeting 3 April 2020 (830 am EST)



Meeting 20 March 2020 (830 am BNL time)
  • Simulation status - Roland
  • Calibration status - Skipper and Ding
  • Repair of Y - Joey
  • Potential RHIC restart - all
  • dN/deta status (if time) - Mike


Meeting 20 March 2020 (830 am EST)



Meeting 19 April 2019
Meeting 22 March 2019

Meeting 15 March 2019
Meeting 22 February 2019
  • Cat - EPD-BBC correlations
  • Skipper - 2018 gain calibrations
  • All - commissioning with beam
    • Run 20 EPD Tasks still to go

Meeting 8 February 2019
Meeting 21 January 2019
  • Is 3:30 on Mondays still okay?
  • Calibrations and database - what is done, what is not? - Skipper, Prashanth
  • Upcoming EPD activities
    • Thurs, 24 Jan
      • Install TUFF & PS - Mike (unless Tim has already done so)
      • Install FEEs on SW FEE box - Mike, Joey, Xiaoyu
      • Ready a staging area - Lehigh crew
    • Friday, 25 Jan
      • Mount EPD (& BBC?) - team
      • dark current / light-tight
    • Saturday 26 Jan
      • let us discuss today
    • 28 January - 1 February - Joey (& Justin?)
      • ....
  • What do we need to be doing now, before arriving at BNL?
  • Commissioning documentation - (click here to see 2018 documentation)
    • Do we need to add slewing?
  • EPD Users Guide and shift crew instruction - Justin & Joey - current documentation here
    • There is a note at the bottom regarding "1-wire scan" that the EPD crew is looking into something....?
  • EPD GUI readiness for this weekend



Meeting 12 November 2018
Meeting 15 October 2018
 Meeting 1 October 2018

Meeting 13 August 2018
Meeting 6 August 2018

Meeting 30 July 2018

Meeting 2 July 2018 
  • Rosi - STAR Collaboration meeting
  • Rosi - Trigger requirements 2019
  • Prashanth et al - Status of the GEANT
  • AOB

Meeting 25 June 2018 
Meeting 18 June 2018

Meeting 4 June 2018 GSTAR PID page: www.star.bnl.gov/public/comp/simu/gstar/Manual/particle_id.html


Meeting 28 May 2018
 First half
  • Status at BNL
Second half
  • AUM posters

Meeting 23 May 2018
 First half



Meeting 7 May 2018
 First half
Second half 

Meeting 23 April 2018
 First half
Second half 

Meeting 16 April 2018
 First half
  • Status at BNL - Joey
  • any issues on the newly-swapped in daughter cards?
Second half - data analysis and simulation
Meeting 9 April 2018
 First half
Second half
Meeting 2 April 2018
 First half
Second half
  • Offline software - Mike
    • EPD in picoDsts - Jerome has not found time to move on this
    • All else is completed

Meeting 19 March 2018
 First half
Meeting 12 March 2018
First half
  • Status at BNL - Rosi
    • QT 32B Replacement - Joey
    • Connector issue - Joey
    • Mapping/Scans/Etc - Rosi
  • Trigger Group
    • Bit Timing?
    • TAC distributions
    • Zero Suppression?
Meeting 26 February 2018
First half Second half
  • Neural network progress - George Halal
  • analysis software update - more progress - Mike
    • EPD fully into StEvent, in dev  - done last week
    • StEpdUtil committed and in dev - done last week
    • StEpdHitMaker committed and in dev - done last week
    • new:  EPD is now officially in STAR muDst (thanks Daniel B!)
    • new:  EPD and BBC geometry and mapping classes in StRoot/StEpdUtil
    • decided:  stay with StTriggerData::bbcXXX methods in muDst; no new classes
    • upcoming:  discussing EPD and BBC in picoDst.  Expect progress this week.
Meeting 26 February 2018
First half Second half
  • analysis software status - progress! - Mike
    • EPD fully into StEvent, in dev
    • StEpdUtil committed and in dev
    • StEpdHitMaker committed and in dev
    • code for EPD in muDst in hands of Daniel B.  He will commit "soon" (today?)
    • picoDst is next
    • implement same for BBC??
  • epd-specific triggers and streams in current run - Rosi

Meeting 19 February 2018
First half Second half
  • analysis software status (StEpdHitMaker, StEpdHitUtil, StEvent, muDst, picoDst) - Mike
    • works well (see item above!).  Review and commit process has stalled.  Situation will soon become critical.
  • simulation software status - Prashanth




Meeting 12 February 2018
First half
  • Status at BNL - Prashanth/Joey/Rosi
    • Database/GUI/etc coordination - status and what remains to be done?
    • Mapping: are we robust against future mistakes?
    • Light leak testing status
    • Source testing results
    • BBC installation schedule
    • Cabling schedule
  • Pre-beam commissioning schedule - Rosi, Mike, all
Second half

Meeting 5 February 2018
First half
  • status at BNL
    • fibers attached, FEE boxes assembled, Rx-to-QT started
    • EQ1 needs replaced (Steve does it today)
    • cannot take data now, probably due to EQ1 problem
    • verified that setting Vbias and Vped (to several values) affect output at Rx cards as expected.
  • mapping issues.  code needs to know what TUFF/Branch/FEE/channel corresponds to what side/Position/Tile.
  • Plans for this week:
    • fix mapping / database
    • light-leak hunt
    • source test with Bill Christie (place source and look for Idark increase) - this tests the map of "channels, etc" to PHYSICAL SPACE
    • verify that setting Vbias on individual tiles increases Idark on those channels (tests consistency of control and monitor maps)
    • individually increase Vped for a tile, take PedAsPhys run, and run data through BFC to make uDSTs.  (Tests mapping all the way from tile electronics to analyzer representation (StMuEpdHit)
    • mount BBC
    •  
    • perhaps... record some normal-incidence cosmic scope traces.  Probably do NOT play with BBC, as per advice of Les Bland.
  • Then
    • pre-beam commissioning


Meeting 29 January 2018
First half
  • status at BNL - the EPD is installed - Prashanth and Mike
  • work to do this and next week.  Preparing for pre-beam commissioning - all
    1. connect SiPMs to FBs (East side)
    2. string and connect FB (East side)
    3. TUFF-to-FEE connection.  Terminal block and harnesses.  Tim will do this Monday.
    4. FB-FEE connection
    5. get slow controls/monitor system up and running - Tonko can do this once #3 is done.  He will do by (on?) Thursday.
    6. At this point, can begin light-tight testing (through dark currents)
    7. MDR cables to FEEs and RxBs
    8. At this point, can look at/for signals from tiles (large-angle cosmics etc)
    9. cable RxBs to QTs
    10. At this point, can begin pre-beam commissioning
      1. Set Vped values
      2. begin mapping verification through PedAsPhys runs
      3. I-V scan
 


Meeting 15 January 2018
First half Second half
Meeting 8 January 2018
First half
  • status report from BNL and January plans
    • January plans and installation schedule - Mike, Robert
    • status of QT-based DAQ for cosmic tests - Rosi (will send an update)
  • final determination of supersector health - Mike
  • status of online controls/monitoring, if any - Prashanth
Second half
  • Inclusion of EPD into StEvent and muDsts - Mike
  • Inclusion of EPD into picoDsts - Yang
  • EPD in GSTAR - Prashanth

Meeting 18 December 2017
First half Second half
  • Software status.  GEANT, StEpd - Prashanth

Meeting 4 December 2017
First half
Second half

Meeting 20 November 2017
First half
  • Justin - Fiber bundle progress
  • All - Any last minute thoughts for next week's testing?
Second half
  • Prashanth - Geant for EPD 

Meeting 13 November 2017
First half
  • Justin - Clear Fiber Bundle Status Spreadsheet - https://docs.google.com/spreadsheets/d/1u5dWDUeguvjiPTBiH32b--NCzr-gS7l-ocCTeo5hBF0/edit?usp=sharing
Second half


Meeting 23 October 2017
First half

Second half
Meeting 16 October 2017
First half
Second half






Meeting 09 October 2017
First half
  • Mike
  • November Analysis meeting plans
  • Prashanth/Wanbing/Te-Chuan - initial plans for Slow Controls & monitoring interface
  • Prashanth - database status (& corrections)
  • Xinyue - analysis of Au+Au 54 GeV



Meeting 02 October 2017
First half


Meeting 25 September 2017
First half
Meeting 18 September 2017
First half
Meeting 11 September 2017
First half Second half

 11 September 2017 - Labor day in U.S. - Meeting cancelled

Meeting 28 August 2017
First half Meeting 21 August 2017
First half


Meeting 14 August 2017
First half
Second half:

Meeting 31 July 2017
  •  Fiber tests - Justin: https://drupal.star.bnl.gov/STAR/system/files/EPD%20Meeting%207-31-17.pdf



Meeting 24 July 2017


Meeting 17 July 2017

Meeting 10 July 2017
  • EPD dismount and storage report

2nd half of meeting:


Meeting 3 July 2017
Hanseul: dN/deta toy model: drupal.star.bnl.gov/STAR/system/files/3Jul17_EPD_dNdeta.pdf

Meeting 26 June 2017
Mike: How to extract pseudorapidity distributions from high-multiplicity data.
(We do not have to discuss this in excruciating detail...)
drupal.star.bnl.gov/STAR/blog/lisa/measuring-pseudorapidity-distribution-epd

Rosi: Questions -> Where are we going to store the quarter wheel?   How is the EPD being transported to BNL?  EPD storage cart?

George Halal: Initial studies of offline EPD trigger
drupal.star.bnl.gov/STAR/system/files/EPD%20Meeting6-26-17George%20Halal.pdf 

Meeting 19 June 2017

Rosi: drupal.star.bnl.gov/STAR/system/files/RReedEPD06192017.pdf
More complete analysis, including PDFs of all 93 channels and their associated ADC, TDC and TAC values can be found at: drupal.star.bnl.gov/STAR/blog/rjreed/auau-54-gev-triggers-and-eval-part-1
For those who may be interested in vertexing, multiplicity in the 54 GeV data, look at (not to be discussed): drupal.star.bnl.gov/STAR/blog/rjreed/auau-53-gev-evaluating-performance

Mike: In Au+Au collisions at 54 GeV (much higher than the multiplicities that drove the design of the EPD), we expect very significant multi-hit events on the tiles.  In fact, this analysis based on central Au+Au collisions at 62.4 GeV published by PHOBOS, indicated that the average hit multiplicity on a tile would be greater than 1.

And indeed, this is what we see, as shown on the following page:
drupal.star.bnl.gov/STAR/blog/lisa/multi-mip-events-2017-epd-auau-54-gev
Most particles are not coming from single-hit events.  So, we will need to be careful not to show "real quick dN/deta distributions," as they will be way off.

Justin:
Fiber polishing and bundle creation at Lehigh
drupal.star.bnl.gov/STAR/system/files/Fibers%2C%20EPD%20Meeting%206-19-17.pdf
drupal.star.bnl.gov/STAR/system/files/SS%25231_Fibers%281%29.pdf

Sam:
Simulation update
drupal.star.bnl.gov/STAR/system/files/sim_EPD_update06192017.pdf


Meeting 5 June 2017
1) Mike: TDCvsTAC
It turns out that all QT channels have a TDC in addition to the ADC they put out.  Supposedly it is a 5-bit TDC, but Hank reports that he's only seen 4 bits fire (returned value 0..15).  I have verified this in the EPD QTB boards, and find that the TDC is linearly proportional to the TAC, in the one QTB board that has a TAC.  You may find the picture here:
drupal.star.bnl.gov/STAR/system/files/TDCvsTAC.png
This could be useful in data analysis, for ALL channels (even the QT32Bs that will not have TAC, which is 75% of the EPD channels in 2018+).  I expect (though it has not been tested) that we can require TDC not equal zero, and be looking at in-time hits..
The TDC information is now included in the StEpdTile data object.

The following plots are ADC distributions, where the blue curves correspond to TDC!=0 and the red curves are for TDC=0.
drupal.star.bnl.gov/STAR/system/files/ValidTDCstudy.pdf
The TDC would seem to be an excellent way to discriminate noise/out-of-time signals from real particles.  Much more convenient than an ADC threshold.....  Except for a couple of bins, where the behaviour is precisely opposite to that expected.  This needs to be investigated.

More detail: drupal.star.bnl.gov/STAR/system/files/TDCstudy.pdf

2) Polishing at Lehigh:
drupal.star.bnl.gov/STAR/system/files/FiberPolishing06052017.pdf
drupal.star.bnl.gov/STAR/system/files/FiberPolishing06052017_pics.pdf

Meeting on 5/22/2017

1) Prashanth: Short update/summary of the situation with the QTs and new FEEs
www.star.bnl.gov/protected/bulkcorr/prashanth/EPD/weeklymeetings/PrashanthS_05222017.pdf

www.star.bnl.gov/protected/bulkcorr/prashanth/EPD/weeklymeetings/PrashanthS_05222017.pdf


Meeting on 5/16/2017 - at BNL during STAR Collaboration Meeting
Tuesday evening at 6:30 with pizza
Current run
Construction Software Ahead
  • all - plans for remainder of 2017 run
  • toward a "standard set of procedures" for operations 2018+
  • AOB

Meeting on 5/08/2017

1) Rosi - BBC-EPD correlations: drupal.star.bnl.gov/STAR/system/files/RReedEPDBBCCorr05092017.pdf
BBC - EPD timing studies: drupal.star.bnl.gov/STAR/blog/rjreed/epd-timing-correletion-slew-correction-vs-bbc-ii
Trigger, etc.

2) Justin - Fiber polishing and testing at Lehigh:
On the hardware page under "Useful EPD Documents":   drupal.star.bnl.gov/STAR/system/files/Justin%20Polishing%20Testing.pdf
Also at: http://www.star.bnl.gov/protected/bulkcorr/prashanth/EPD/Polishing_Testing_Justin_05082017.pdf


Meeting on 5/01/2017

1) Rosi - EPD-BBC timing studies & QT32C spikes - drupal.star.bnl.gov/STAR/blog/rjreed/epd-timing-correletion-slew-correction-vs-bbc

2) Prashanth - status at STAR
Also, discriminator study: drupal.star.bnl.gov/STAR/subsys/epd/operations-2017/discriminator-threshold-scan

3) Rosi - status of trigger coordination, including trigger bit test, etc.

4) Gerard - status/plans for FEE upgrade drupal.star.bnl.gov/STAR/system/files/gain_change_update.pdf

5) Mike - status/plans of EPD construction at OSU

6) Mike - ADC spectra with TAC cut - drupal.star.bnl.gov/STAR/system/files/ADCfitsTACcut_Lisa28apr2017.pdf

7) All - availability for in-person EPD session at STAR Collaboration Meeting

8) All - Plans for the coming week




Meeting on 4/24/2017

1) Rosi's blog:
drupal.star.bnl.gov/STAR/blog/rjreed/epd-analysis-32b-vs-32c-timing-correlations-etc

One important point:  best START for QT32Bs is -8 and best START for QT32Cs is -20

2) Joey BBC-EPD
www.dropbox.com/s/rbgzbbuhqfev1kr/BBCEPDCorr.pdf

3) Mike timing
www.dropbox.com/s/bn5wpxxj8gmm2qv/Timing.pdf


EPD To-Dos:
1) Confirm 32C settings - Change Tier 1 file!
2) Threshold Scan (32B first, then 32C once the above is accomplished)
3) DSM Bit checking
4) Software in CVS?


Meeting on 4/17/2017

1) Prashanth (software)
Mike's StEpd analysis software:  /star/u/lisa/StEpd/

Database related
https://drupal.star.bnl.gov/STAR/blog/sprastar/epd-offline-db-table
https://online.star.bnl.gov/dbExplorer/
Meeting on 4/10/2017

1) Status of QT32Cs - Prashanth, Rosi, Gerard, Hank(?)

2) Bias scan - Mike
drupal.star.bnl.gov/STAR/subsys/epd/operations-2017/bias-scan


Meeting on 4/03/2017

0) Status - Prashanth, all

1) Prepost 32c vs 32b

2) Gate scan + conclusions
drupal.star.bnl.gov/STAR/system/files/GateScan_1.pdf
Summary:
  • QT32B likes START=-8  (as we concluded before)
  • QT32C likes START=-20
  • we see the "left edge" of the drop-off reasonably well
  • Gate scan concluded
3) Update on mounting structure - Robert

4) Bias Scan - Rosi has produced files for analysis; Mike has not yet analyzed them.

5) Gerard, all: interpretation of QT32C messages

6) Dark current:

7) Rosi - IV scan histograms: drupal.star.bnl.gov/STAR/system/files/IvscanHistos_03_26_2017.pdf

7.5) Sam - First steps with GEANT4 EPD: drupal.star.bnl.gov/STAR/system/files/EPD_geantSTARSIM_0.pdf

8) (If time) - Rosi: First steps with UrQMD: drupal.star.bnl.gov/STAR/system/files/RReedEPD03272017.pdf

8.5) Rosi: Starting to look at BES data (7.7 GeV): drupal.star.bnl.gov/STAR/system/files/RReedEPD04032017.pdf

9) Tasks for the coming week.
  • From last week: 1,2 are done; 3 is canceled; 4 is done but not analyzed.  5....?
  • New tasks

Meeting on 3/27/2017

1) Prashanth, all:
  • Current problems - CAMAC PS?
  • Plans for access
  • do not swap QT32C inputs with QT32B for now (see "steps for this week" below)

2) Mike - Gate scan study
3) All: Next steps for this week
  1. get trigger guys to put us in PrePost=0
  2. continue gate scan to "more negative" values to find QT32C plateau and final gate delay value
  3. swap inputs of QT32C with a QT32B to check gain (why this is not already known from the lab...??)
  4. Bias scan
    • step size, range
    • what is figure of merit? "MIP position matching"?  Separation from dark current?
    • operationally - take-a-run, burn-a-run while switching, take-a-run...?
  5. TAC ajustment - will need Jack's help (Gerard will be at BNL?)

4) Dark current:

5) Rosi - IV scan histograms: drupal.star.bnl.gov/STAR/system/files/IvscanHistos_03_26_2017.pdf

6) Joey - BBC-EPD correlations - drupal.star.bnl.gov/STAR/system/files/EPD%20Presentation.pdf

7) (If time) - Rosi: First steps with UrQMD: drupal.star.bnl.gov/STAR/system/files/RReedEPD03272017.pdf




Meeting on 3/20/2017
1) Mike: PrePost study of runs 1806643, 18076064 and 18076065:
drupal.star.bnl.gov/STAR/system/files/Study18066043and18076064and18076065all.pdf
(This study under the Operations 2017 child page)

2) Mike: Draft (v1) of trigger documents shared with trigger group and to be discussed 21march2017:
drupal.star.bnl.gov/STAR/system/files/EPD%20Trigger%20Requirements%20v1.pdf

3) Mike: First Gate Scan study.  This will need to be revised, as discussed on first page of this document.
drupal.star.bnl.gov/STAR/system/files/GateScan_PrePostIndex2.pdf
(This study under the Operations 2017 child page)

 Meeting on 3/13/2017
1) Mike: TAC-selected spectra from run 18067001: drupal.star.bnl.gov/STAR/system/files/Run18067001_spectra.pdf
Also, drupal.star.bnl.gov/STAR/system/files/FitValidTACadcSpectrum.pdf


Meeting on 3/6/2017
1) Mike: Spectra Fits from vbias 56.5V data: drupal.star.bnl.gov/STAR/system/files/MLisaEPDFits03062017.pdf

2) Rosi: Vbias comparison: drupal.star.bnl.gov/STAR/system/files/h_CompareVolt03052017_Vbias56_5_v3.pdf
How shall we set these values?  (Above needs to be repeated with the better vped values and with Jack's new Tier1 file.)


 Meeting on 2/27/2017
1) Rosi - Tested the detector by increasing the Vbias in each channel by 5 V.  The dark current increased, one can see it at:
drupal.star.bnl.gov/STAR/system/files/h_DarkCurrentHistogram_Nhours149.pdf
The current increase is at the end.
Plot of the pedestal per channel:
https://drupal.star.bnl.gov/STAR/system/files/h_Ped18052002_v2.pdf
Only one channel is "fat" and it should be determined whether it is FEE, QT, or Receiver
Dark Current as of this morning:
drupal.star.bnl.gov/STAR/system/files/h_DarkCurrent_Nhours288.pdf
Gerard asked what happens if we decrease ymax to 0.3nA, see:
drupal.star.bnl.gov/STAR/system/files/h_DarkCurrent_Nhours288_ymax03.pdf
Lehigh schedule for WSL fibers:
drupal.star.bnl.gov/STAR/system/files/epd_schedule_Lehigh_WSL.pdf

Also note, Prashanth has added it to the online monitoring!

2) Prashanth - Timing in, inclusion to StRoot

3) Sam - Adding EPD to the STAR GEANT:
drupal.star.bnl.gov/STAR/system/files/Epd_Geant.pdf

 Meeting on 2/20/2017
1) Rosi -
VPed Setting: Code is at /gpfs01/star/subsysg/EPD/VpedDet/
Summary: drupal.star.bnl.gov/STAR/system/files/RReed_EPD_02192017_Vped.pdf
1 set of fits: drupal.star.bnl.gov/STAR/system/files/h_Vped.pdf

Vbias: Code is at /gpfs01/star/subsysg/EPD/IVScan
Summary: drupal.star.bnl.gov/STAR/system/files/RReed_EPD_IVscan_02192017.pdf

Dark Current: Code is at /gpfs01/star/subsysg/EPD/DarkCurrentMonitor
Summary: drupal.star.bnl.gov/STAR/system/files/RReed_EPD_IVscan_02192017.pdf
Scan at of 10:30 am: drupal.star.bnl.gov/STAR/system/files/h_DarkCurrentHistogram_EPD02202017.pdf
Note: I did an IV scan, which we can see the evidence of.  Also, I am unsure why one of the boards is not showing any movement.  I will check on this during the week.

Open questions: When can we be timed in? Shift crew instructions? Monitoring at: https://online.star.bnl.gov/epd/ ?  MuDst?

2) Prashanth -
online monitoring page here: https://online.star.bnl.gov/epd/

Notes: Prashanth is discussing with Akio the best way to incorporate our detector in the MuDsts.  The question is where does the mapping get picked up, which is currently being picked up in the trigger data.
Action items for Rosi:
*Test the detector by setting Vbias = Vbias + 5 V to see that the dark current has increased.
*Plot the pedestal distributions per channel.
*Touch base with Akio/Tonko about the functionality of the standby mode and whether it is needed for pedstal runs.
*Fix Vped for 3 channels not connected to an EPD tile
*Touch base with Prashanth to see what software tasks can be distributed so he can concentrate on incorporating the EPD into the MuDst
*Ask to have the IV Scan + Pedestals taken via the shift crew (pending the answer from Akio/Tonko).
We also discussed the need for documentation, at the moment things are a bit chaotic.  This will improve our ability to distribute tasks.

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