sPHENIX is a new detector at RHIC.

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

Also available on agenda: https://indico.bnl.gov/conferenceDisplay.py?confId=1344

 

Production status: Chris Pinkenburg

 

All sims production have been done

·       Embedding production finished with both 1D and 2D Spacals. Only tower saved in calorimeter to fit into available disk space.

·       Reprocessing a few hcal sims without absorber hits to create space for the production.

 

Output dir:

·       /gpfs02/phenix/prod/sPHENIX/preCDR/pro.1-beta.5/

·       /gpfs02/phenix/prod/sPHENIX/preCDR/pro.1-beta.6/: new Hcal production with light corrections

 

 

Software updates: Mike McCumber

 

Recent updates:

·       Sorting out primary particle:  https://github.com/sPHENIX-Collaboration/coresoftware/pull/75

·       Tabulation of evaluation errors: https://github.com/sPHENIX-Collaboration/coresoftware/pull/77

 

 

On-going work:

·       Alan reported the evaluation on TPC slow.
Mike: on TOOD list to profile for the problem

·       Track projection #69. Pull request coming soon. Handle both cases.

·       Calorimeter truth info compression, using shower objects.

 

 

HCal update: John Lajoie

 

Page 2:

John: Ended up as a new build by implementing light collection in step level for inner HCal

 

Page 3:

John H.: request add this sampling fraction number to pre-CDR

Jin: two sampling fraction format exists. Suggest use Sum[edep_scint]/( Sum[edep_scint] + Sum[edep_absorber]), rather than light_yield based numbers

John L: will implement

 

Page 5:

John L: sub-percent improvement after light correction

 

Page 8:

John L: Marginal change in tails too

 

Page 9:

Jin: 0% tail problem?

Most gone after high stat sample.

 

Mike: Would light correction apply to the energy deposition or the light yield on G4 hits?

Jin/John L: light correction has been updated to modify light_yield

Mike: one thing to notice that the evaluator use edep() to trace max truth.

 

 

EMCal update: Jin Huang

 

Page 3/4:

Dave: what is the orientation of the plot?

Jin: Vertical axis is the distance of tower to the track projection along the azimuthal direction. Therefore the radiative tail is always in the vertical direction.

 

Page 4:

Mike: New tracking projection would use the track state vector at the last station to perform the projection, which should improve the pointing as electron radiates photon side the tracker. Would this be needed immediately?

Jin: Not immediately. But if available, happy to use.

 

Page 6:

Jin: Birk correction seems suppressed the hadron tail by x2-3, which translate to improved hadron rejection performance.

 

 

Page 8:

Dave: it appears realistic simulation produced a softer rise in rejection at high electron efficiency end.

Jin: yes. It also shows 8GeV electron suffers back leakage at the very high efficiency end.

 

 

 

 

  

 

______________________________

 

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, October 19, 2015 1:33 PM

> 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 meetings, Tue Oct 20th, 1-3PM @ 3-

> 192

>

> Dear All,

>

> This is a reminder for the weekly simulation meeting Tue Oct 20th, 1-3PM @

> 3-192. Let's start the meeting with production and software updates, which

> will be followed by the pre-CDR study updates for both EMCal and HCals.

>

> The agenda page is at

> https://indico.bnl.gov/conferenceDisplay.py?confId=1344   , 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

> ______________________________