sPHENIX discussion of software

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

 

Software update:

 

Jet QA from Jin Huang:  https://github.com/sPHENIX-Collaboration/coresoftware/pull/105

Suggestion:

Dennis: finer binning for tower constituent.

Mike (offline discussions): suggested a better definition for unique jet matching

 

Action Item [Jin]: update accordingly.

 

 

Uniform vertex smearing for HEPMC inputs from Mike McCumber: https://github.com/sPHENIX-Collaboration/coresoftware/pull/106

Conclusion: merge.

 

 

Prototype update - Murad Sarsour

 

Page 3:

Jin/Sarah: what is the black points?

Murand: center of scintillator from Richie’s drawing

 

Murad: tension of bottom plate

 

Chris: what are plotted as red curves?

Murad: Geantino entry/exit point scan in Geant4.

 

Page 10:

Murad/Jin: as the thickness of absorber and scintillator plates remain the same during this test, the sampling fraction (SF) would not change in the leading order

 

Gabor: for small sampling fraction, plot 1/SF may be more informative than plotting SF.

 

Conclusion:

Action Item [Jin, Murad]: look for help from Richie and Chris to resolve the difference on the bottom plate location.

Action Item [Murad]: send the code and macro to GitHub to prepare for merging

 

 

Fast calo sim for tracking study: Kurt Hill, Ron Belmont

 

Page 4:

Kurt: "No electron separation" means no em-hcal layers separation in shower response in simulation

Many: suggest use particle ID in Geant4 to simulate difference of EM and hadron segment of shower response

 

Page 6:

Kurt: where the lib would come from.

Jin: good to use the production batch of 1000 particle sampled in 400 configurations,

 

Dennis: instead of fast sim of parameterized calorimeter simulation, we can try merging single batch of calorimeter G4 simulation production and newly run tracking G4 simulations.

Many: this is a very good idea. Need careful treatment of synchronization and the caveats of merging truth information.

 

Conclusion: start simple with Method 1.

 

 

Kalman Filter exploration: Haiwang Yu

 

Summary: Haiwang is looking into generic Kalman filter algorithms including Geant4e integrator and GenFit interface package. With help from Dr. Kun Liu (LANL), Haiwang is able to run Geant4e under a SeaQuest implementation.  

 

Haiwang: Geant4e carried a bug before, which is fixed in the current Geant4 version used in sPHENIX RCF.

 

Dave, Mike: Rave has an interface to GenFit too.

 

 

 

 

 

______________________________

 

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: Friday, February 12, 2016 2:08 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 and software meeting, Tue Feb 16th,

> 1PM EST @ 2-219

>

> Dear All,

>

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

> software meeting, Tue Feb 16th, 1PM EST @ 2-219.

>

> We will start the meeting with two tracking related topic: 1) Kurt Hill (UCB) on

> tracking option simulation with fast calorimeter parametrization. 2) Haiwang

> Yu (NMSU) on exploration of general purpose Kalman filter options. More

> topics are welcomed too.

>

> The agenda page is at

> https://indico.bnl.gov/conferenceDisplay.py?confId=1668 , 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

> ______________________________