sPHENIX MAPS tracker discussion

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

Hi everyone

Homework from today's meeting: Shashlyk EMCal for emulating albedo is 
uploaded at branch fastEMCal of the taskforce repository at 
https://github.com/sPHENIX-Collaboration/macrosIDTF/tree/fastEMCal/macros/g4simulations
 

It should be very fast to run when compared with the default simulation. 
Calorimeter info was also not digitized (no PHG4Hits from calorimeters), 
which leaves a small memory and file foot print. A blackhole is placed behind 
EMCal to stop further simulation of hadronic showers beyond the 1st layer of 
calorimetry. 

Given most of our CPU time is spent on tracking, I would think it could be 
advantageous to run with this configuration, so we would not worry about the 
missing albedos when interpreting future results. From Tony's past studies, 
calorimeter albedo could contribute to about 1/3 of the outer TPC occupancy. 
Nevertheless, it will be nice to first learn from Ross and Molly 
quantitatively on the added CPU cost and the relevance of calorimeter albedo 
for background contributions. 

Cheers

Jin

______________________________

Jin HUANG

Associate Physicist
Brookhaven National Laboratory
Physics Department, Bldg 510 C
Upton, NY 11973-5000

Office: 631-344-5898
Cell:   757-604-9946
______________________________

From: Ross Corliss <rcorliss AT mit.edu> 
Sent: Tuesday, August 14, 2018 5:14 PM
To: sphenix-maps-l <sphenix-maps-l AT lists.bnl.gov>
Cc: Todoroki, Takahito <todoroki AT rcf.rhic.bnl.gov>; Carlos Perez 
<carlos.perezlara AT stonybrook.edu>; Anthony Frawley <afrawley AT fsu.edu>; Chiu, 
Mickey <chiu AT rcf.rhic.bnl.gov>; sanghoon.lim AT colorado.edu; Molly Taylor 
<mitay AT umich.edu>; Chiu, Mickey <chiu AT rcf.rhic.bnl.gov>; 
sphenix-intt-l AT lists.bnl.gov; Huang, Jin <jhuang AT bnl.gov>
Subject: Next Meeting of the Inner Tracker Task Force

Dear All, 

We will have the next meeting of the inner tracker task force at the standard 
time, tomorrow, Wednesday, at 9am EST.
The corresponding indico page with the bluejeans link and any uploaded 
presentations can be found here:

https://indico.bnl.gov/event/4884/

And the link to the google doc (which is also linked on the indico page) with 
the task lists and work assignments can be found here:

https://docs.google.com/document/d/17PJdu94Ydg25V-cTHIYfSbkfojH4ZUEfsfoZPm0RDb0/edit

I look forward to speaking with you all tomorrow.

Cheers,
-Ross