sPHENIX discussion of software

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

Generic update:

 

Standard sPHENIX simulation production refreshed by Chris:

·       Newest batch is ready with dates 2016-07-06, including single particle sample in the new reference designed as defined in the re-scoping supersize.

·       Location: /gpfs/mnt/gpfs02/sphenix/sim/sim01/production/

 

Other updates:

Action Item[Mike]: tracking update to handle variable layer of silicon inner tracker

 

 

Tracking software update with focus on TPC - Mike McCumber

 

Current build TPC code status:

·       Able to produce track with good efficiency and purity.

·       Degraded momentum resolution, suspect originate from missing outlier rejection and cluster error treatment

·       Treatment of vertex resolution

 

Mike now working on two main parts

·       Rework event generator to properly simulate TPC+MAPS pile up effect

·       Cluster error handling

 

Jin: Are we still using the different tracking code bases for TPC and silicon tracking? Do we plan to keep maintaining two forks of tracking algorithms?

Mike: Yes. And it will be so for a while.

 

 

Simulation updates in Test beam Workfest

 

SPACAL updates - Jin Huang

 

John H.: Shall we consider rotate radial gap away from pointing to the vertex. Need to quantify acceptable gap effect in sPHENIX

Jin: Electron gets bended away from radial direction before indenting into EMCal. The gap projectivity effect can be studied with an angle scan of photons into the EMCal

 

Slide 10: energy resolution

Jin: Beam momentum spread is included in \Delta E for both simulation and data.

 

Anne: what was the cluster size used in simulation?

Jin: summing 64 towers in simulation for the current plots. Since simulation do not have tower-to-tower calibration variation.

 

HCal updates - Xiaochun He

 

Slide 10: calibration constant from COSMIC

Jin: please note Birk correction will change energy scales

 

Page 16: resolution plot

Jin: this resolution is better than shown from Abhisek

Xiaochun, Abhisek: difference may from G4Hit sum and digitized sum.

 

Slide 17: linearity plot

Craig: if non-linearity comes from leakage, why not in a logarithmic shape?

Xiaochun: may have major contribution from missing energy in shower

Jin: Good to check leakage directly

 

Jin: it will be good to try data analysis technique like bootstrap on the simulation data to reveal possible biases.

 

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: Huang, Jin
Sent: Monday, July 11, 2016 11:52 AM
To: sphenix-software-l AT lists.bnl.gov
Cc: sphenix-l AT lists.bnl.gov
Subject: [reminder] sPHENIX simulation and software meeting, Tue July 12th, 1PM EST @ 2-219

 

Hello everyone,

 

This is a reminder that we will have a special sPHENIX simulation and software meeting, Tue July 12th, 1PM EST @ 2-219.  After software and production updates, we will have a joint the session with the Calorimeter Test Beam Workfest, which contains two talks on HCal and EMCal prototype simulation updates.  

 

The agenda page is at https://indico.bnl.gov/conferenceDisplay.py?confId=1918    , for which the common modification password is "1008"

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

•           To join the Meeting: https://bluejeans.com/427507898    (workfest phone bridge, one time use)

•           To join via phone :

1)  Dial:

              +1.408.740.7256

              +1.888.240.2560

              +1.408.317.9253

              (see all numbers - http://bluejeans.com/numbers?ll=en)

2)  Enter Conference ID : 427507898   (workfest phone bridge, one time use)

 

Cheers,

 

Jin

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________