sPHENIX is a new detector at RHIC.

["Huang, Jin" <jhuang AT bnl.gov>]

Also available on agenda: https://indico.bnl.gov/conferenceDisplay.py?confId=1338

 

Chris: Production Update

 

Current production is still 3rd iteration from last week: The output is under

·       with 1d projective spacal: /gpfs02/phenix/prod/sPHENIX/preCDR/pro.1-beta.3/sHijing/spacal1d

·       2d projective spacal: /gpfs02/phenix/prod/sPHENIX/preCDR/pro.1-beta.3/sHijing/spacal2d

·       hijing with 1d spacal :  /gpfs02/phenix/prod/sPHENIX/preCDR/pro.1-beta.3/sHijing/spacal1d/

·       hijing with 2d spacal: /gpfs02/phenix/prod/sPHENIX/preCDR/pro.1-beta.3/sHijing/spacal2d/

 

Fixed Hcal cell builder, which is used to read the production output

 

Jin: we will need events with pp pythia(8) to update the trigger turn-on curves.

Mike/Matt Snowball: PHPythia8 is ready, which directly output to the HEPMC DST node.

Chris: need to load the pythia8 binary/data and allow it to work in Fun4All cycles.

 

Action Item [Chris/Mike]: string out the use of pythia8 in sPHENIX fun4all framework. Pythia production.

 

 

Mike: analysis software

 

Summary: completed jet evaluator, moving on to tracking code.

 

Mike: Hijing binary is missing.

Chris: Concern of using FORTRAN code in sPHENIX nightly build software. Need to installing it as external package to the nightly build.

 

Action Item [Chris]: install official hijing code in sPHENIX

 

Mike: missing the calibrated Towers. The raw  Geant4 energy is saved in tower right now

Jin: Needed similar thing in the EMCal beam test processing. Currently use a test code for digitalization/calibration. Try to formulate the modules and add today/tomorrow

 

Jet Eval is ready: Pull request here:

https://github.com/sPHENIX-Collaboration/coresoftware/pull/34

which will also retire the old evaluators.

Examples in using the new jet evaluation object in Fun4All modules can be found in the ntuple maker:

https://github.com/sPHENIX-Collaboration/coresoftware/blob/master/simulation/g4simulation/g4eval/JetEvaluator.C

 

Action Item (Done) : After discussion, we decided to merge the pull request.

 

Tracking: updated verbosity to quiet down output if verbosity = 0 with Chris. Tuning on a test branch, which to be merged later.

Mike/Chris: plan to use verbosity = 0 in test runs so error messages are more prominent. And use verbosity = 1 for production to keep track minimal identification information on the modules/algorithms.

 

Action Item [Chris]: Setup a global flag on verbosity to simplify the switch between user test (verbosity = 0 ) and production (verbosity = 1)

 

Chris: cluster ID will be updated soon.

Mike: should not be conflicting with evaluator code.

 

 

Jin: EM Calorimeter Prototype

 

Page 4: QGSP_BERT_HP physics list is used in test beam production, similar to sPHENIX production.

 

Mike: from test run of Fun4All_sPHENIX.C (GitHub/macro repository), it appears we are not using the *_HP physics list?

Chris: it is slow to run. Therefore, only enabled in production. By default from GitHub, a much CPU-lighter physics list is used (QGSP_BERT).

 

Page 5:

Xiaochun: test beam muon/hadron composition is available from the sPHENIX HCal data

Jin: an additional muon component would change the total yield in the hadron beam, since the MIP peak is used for normalizing the simulation events.

 

Page 6: typo on title. It is 4GeV/c test beam simulation VS data.

 

Action Item [Jin]: follow up and find out the muon/hadron composition with Xiaochun and John Haggerty.

 

Xiaochun: What was the absolute energy calibration strategy in the 2014 eRD1 test beam?

Jin: Not sure for eRD1. For this study: the ADC spectrums were provided by Oleg Tsai. Then a single scale constant was used to scale all data points in the energy axis, so that the peak center for the 8GeV electron data matches.

 

Xiaochun: test beam 2016 is being implemented at GSU. Need to add EMCal in.

Jin: The prototype SPACAL code works in Fun4All + sPHENIX setups. Will be happy to incorporate with Xiaochun’s test beam macro.

 

Page 8: to pass down the tower/digitalization/calibration strategy to sPHENIX analysis.

 

Action Item [Jin]: implement tower digitalization and calibration modules. Coordinate it with Hcal analysis with Abhisek Sen.

 

 

John L. / Abhisek  S. / Megan C.: Hcal simulation updates:

 

Ongoing HCal studies. 

·       [Abhisek]: update resolution plots with photon fluctuation and clustering
John L.: suggest study in the ordering of G4 hit performance over all acceptance -> photon fluctuation -> towering effect
Mike: used to produce compiled plot with resolution curves at different stages of analysis (Geant4 sum/towering/etc.). Good for comparison.

·       [Megan]: Tilt angle scan.
Chris: we can implement that if using the new inner Hcal code to reproduce the outer Hcal geometry with tiltable angles.

·       [To be identified] quantify light collection tuning VS performance.
Mike: previously attempted incorporate light collection map on tiles using the global coordinates.
John: to current resolution, that is a good direction to go. 

 

Plan to update on HCal in the next simulation meeting.

 

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: sphenix-software-l-bounces AT lists.bnl.gov [mailto:sphenix-software-l-bounces AT lists.bnl.gov] On Behalf Of Huang, Jin
Sent: Tuesday, September 8, 2015 8:14 AM
To: sphenix-l AT lists.bnl.gov; sphenix-software-l AT lists.bnl.gov
Subject: [Sphenix-software-l] [reminder] sPHENIX simulation meetings, Tue Sept 8st 1-3PM @ 3-192

 

Dear All,

 

This is a reminder that we will have our weekly sPHENIX simulation meeting Tue Sept 8st 1-3PM. Similar to the last meeting, let’s start with updates on the simulation production/new software features for pre-CDR. More contributions are welcomed too.

 

The agenda page is at https://indico.bnl.gov/conferenceDisplay.py?confId=1338  , for which the modification password is 1008

 

·       For residents at BNL, we will meet in the 3-192 conference room.

·       To join the Meeting via bluejeans: https://bluejeans.com/468481110

·       To join via Phone:

1) Dial:

        +1 408 740 7256

        +1 888 240 2560(US Toll Free)

        +1 408 317 9253(Alternate Number)

        (see all numbers - http://bluejeans.com/numbers)

2) Enter Conference ID: 468481110

 

Cheers,

 

Jin

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________