sPHENIX is a new detector at RHIC.

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

Minutes also available on agenda: https://indico.bnl.gov/conferenceDisplay.py?confId=1909

 

Announcement:

No meeting next week, as partly merges into sPHENIX HF jet workshop: https://indico.bnl.gov/conferenceDisplay.py?confId=2077 and the sPHENIX collaboration meeting

 

 

Software update

 

Outstanding issues:

1. Alan proposed a fix on TPC simulation: https://github.com/sPHENIX-Collaboration/coresoftware/pull/143  

a.       He expect similar high-pT performance

b.      TODO (volunteered needed, or Mike can only take the task after Thu):

                                       i.            Try it out with TPC simulation in Hijing embedding

                                     ii.            SVX tracking takes too long with this pull request. Therefore need to develop an algorithm switch for SVX

2.       Bug introduced to tracking: https://github.com/sPHENIX-Collaboration/coresoftware/issues/147

a.       In the last two weeks but before latest change in stepping action

b.      TODO: Mike can work on it after Thu

 

General wish list:

·       Keep more frequent ANA-builds to help trace bugs.

·       Request Mike and Jin to run standardized calorimetry and tracking QA on Play-builds that carry major software change, like Geant4 versions

Action Item [Chris, Jin]:  discuss reasonable way to do so.

 

 

TG preparations on ALD charge:

 

Upsilon TG

Action Item [Tony, Marzia]: Embedding Upsilon in Hijing in fast simulation, now stuck on issue 2 as mentioned above as Mike is solving

Action Item [Kurt, Tony]:   Tony + Kurt on fast calorimetry simulation

Action Item [Jin]:  update Electron ID

 

Jet Structure TG

Calorimetry simulation to run:

·       Thin outer HCal

·       EMCal partial coverage

·       No inner HCal

Action Item [Chris. Jin]: prepare these calorimetry setup in Geant4

Action Item [Rosi and Dennis]: produce different sample of Pythia jet for this study.

 

HF Jet TG

Action Item [Dennis, Mike]: update track counting tagger performance via parameterized Pythia simulation

Action Item [Jin]: update electron ID to infer on SLT performance

 

 

CEMC 2x2 ganging - Jin

 

Ready for analyzer: https://github.com/sPHENIX-Collaboration/coresoftware/pull/146

Qualitative check on cluster position performance via default Clusterizer and energy-weighted position (both not optimized)

Offline discussion: Justin group volunteer to check photon performance

 

 

Fast calorimeter simulation - Kurt Hill

 

Fake track electron ID performance requires full tracker simulation + fast simulator on calorimetry (CEMC)

 

Slide 3: introduction

Kurt/Tony: Magnetic bending is considered for the primary particles

 

Slides 4:

Tony: how simulated?

Jin/Kurt: record location/momentum of particle hit a cylinder @ CEMC shower max. Kill the particle in Geant4, then parametrize its shower response in energy and special spread in fast simulator. Output is CEMC towers.

 

Action Item [Kurt, Tony]:   complete these tools

 

 

Kalman filter - Haiwang

 

Close to final in performance cross check of new/existing Kalman filter.

 

Page 4:

Tony: Flat background suggest bug in tracking or track selection.

 

Page 5:

Missing label:

·       P0: constant term

·       P1: linear term

 

Page 6: DCA comparison

Action Item [Haiwang]: perform more careful check by splice one pT+eta bin and compare the DCA shape

 

RAVE update: solving RAVE bug on field direction handling

Action Item [Haiwang]: Better temp. solution than run RAVE in zero-magnetic is to reverse magnetic field direction in Haiwang’s sPHENIX simulation tests.

 

Page 10: plan

Action Item [Jin, Haiwang]: Geometry translation

Action Item [Haiwang]: Make pull request to check in nightly-builds.

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

 

> -----Original Message-----

> From: Huang, Jin

> Sent: Monday, May 9, 2016 11:57 AM

> To: 'sphenix-l AT lists.bnl.gov' <sphenix-l AT lists.bnl.gov>; 'sphenix-software-

> l AT lists.bnl.gov' <sphenix-software-l AT lists.bnl.gov>

> Subject: [reminder] sPHENIX simulation and software meeting, Tue Apr 26,

> 1PM EST @ 2-219

>

> Hello everyone,

>

> This is a reminder that we will have a sPHENIX simulation and software

> meeting, Tue May 10, 1PM EST @ 2-219.

>

> Currently on agenda:

> •         Simulation update for ALD charge

> •         EMCal 2x2 ganging

> •         Kalman filter verification on DCA performance

> More contributions are welcomed too.

>

> The agenda page is at

> https://indico.bnl.gov/conferenceDisplay.py?confId=1909  , for which the

> common modification password is "1008"

> •            For residents at BNL, we will meet at the 2-219 conference room this

> time

> •            To join the Meeting via phone bridge:

> https://bluejeans.com/619960505

> •            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: 619960505

>

> Cheers,

>

> Jin

>

>

> ______________________________

>

> Jin HUANG

>

> Brookhaven National Laboratory

> Physics Department, Bldg 510 C

> Upton, NY 11973-5000

>

> Office: 631-344-5898

> Cell:   757-604-9946

> ______________________________

>