Hi John,
Interesting! Looking at the sampling fractions I calculated in
my talk today I think it's clear that edep() is likely *not* fully
capturing the nuclear binding energy, despite what we think we know
from the GEANT4 documentation. If it were then the sampling
fractions calculated using edep() and the visible energy (from the
ionization energy alone, with Birks factor applied) should be quite
a bit more different than they actually are.
What edep() captures, and the nuclear binding energy, may well
depend on the physics list you use as different packages make more
or less information available?
Regards,
John
On 7/7/2015 3:25 PM, John Haggerty
wrote:
John,
Just to add another point, I used my favored GEANT example AnaEx01
to just add up all the energy from a single incident 50 GeV pi+ in
a silly calorimeter:
---> The calorimeter is 10 layers of: [
1000mm of G4_STAINLESS-STEEL + 1mm of G4_POLYSTYRENE ]
(i.e., 10 m of steel, and a large transverse size) with all GEANT
defaults is that same 45 GeV you mentioned. I tried putting the
particle into the middle of the calorimeter to see if there was
some kind of albedo going on, and it gave a similar distribution.
On 7/7/15 2:15 PM, Huang, Jin wrote:
Also available on the agenda:
https://indico.bnl.gov/conferenceDisplay.py?confId=1181
*__*
*_John - HCal_*
Page 2:
Chris: "HP" in QGSP_BERT_HP physics list means high precision
neutron
Page 3:
Analysis packages available on GitHub, useful for other people
to use as
examples:
https://github.com/sPHENIX-Collaboration/analysis/tree/master/HCal-analysis
Page 5:
10% of the energy is missing when sum all sensitive volume.
Chris: did study on hadron shower energy conservation in a large
block
of material about one year ago, which showed similar behavior.
*Action Item [Martin]*: Test to energy conservation directly
with a
black hole of small radius and a block of large material, in
order to
check the consistency.
Page 7:
Achim: shall we also check the spatial distribution of the
shower for
different absorber materials?
*Action Item [John]:*will be able to test so.
Page 12:
Jin: suggest plot SF VS CG of the subsystem compartment being
investigated (e.g. inner Hcal only)
*Action Item [John]:*agree
Page 13, 14:
Jin: E_{OFFSET} has to be a function of three measured light
yield. How
to estimate?
Craig and John: it is still an open question
John and Chris: good to plan of large scale simulation
production jobs
in the July simulation work fest.
______________________________
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 6, 2015 2:58 PM
*To:* 'sphenix-software-l AT lists.bnl.gov'; phenix-nextmid-l
*Subject:* [One-time different room 2-187] Tue July 7 1-3PM
sPHENIX
simulation meetings @ 2-187
Dear All,
This is reminder of our weekly sPHENIX simulation meeting Tue
July 7
1-3PM. For residents at BNL, we will meet in the *2-187
conference room*
(back to regular room next week).
Currently on the agenda are HCal simulation update by John
Lajoie. More
topics are welcomed too.
The agenda page is at
https://indico.bnl.gov/conferenceDisplay.py?confId=1181 , for
which the
modification password is *1008*
To join via Browser:
https://bluejeans.com/377457648/browser
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: 377457648
Cheers,
Jin
______________________________
Jin HUANG
Brookhaven National Laboratory
Physics Department, Bldg 510 C
Upton, NY 11973-5000
Office: 631-344-5898
Cell: 757-604-9946
______________________________
_______________________________________________
Sphenix-software-l mailing list
Sphenix-software-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/sphenix-software-l
_______________________________________________
Sphenix-software-l mailing list
Sphenix-software-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/sphenix-software-l
--
John Lajoie
PHENIX Deputy
Spokesperson
Professor of Physics
Iowa State University
(515) 294-6952
lajoie AT iastate.edu
Contact me: john.lajoie
|