Also available on agenda:
https://indico.bnl.gov/conferenceDisplay.py?confId=1337
Chris Pinkenburg : simulation production
Trying 3rd iteration of single particle production (allow use realistic SPACAL tower in analysis stage). Hijing still have condor issue.
Working on it.
https://github.com/sPHENIX-Collaboration/coresoftware/releases/tag/pro.1-beta.3
Jin: as Hijing data coming, there would be a more emergent need of embedding single particle simulated data into HIJING (currently we can
only do embedding by running the simulated of signal particle).
Chris: agree. Need to take over hit ID on PHG4hit, truth particle container (particle and vertex) and update the association.
Action Item [Jin] : check into the details and
propose a module to do so.
Mike McCumber : vertex analysis scheme
Requested merge the vertex development branch. Added G4 vertex folder/lib. Add following two tiers of vertex objects:
·
BBC fast sim vertex
·
Global vertex
Pull request available for comments:
https://github.com/sPHENIX-Collaboration/coresoftware/pull/30
Jin: shall we use the average beam position or 0 cm location for BBC X/Y in the global vertex?
Action Item [Mike]: add beam X-Y to BBC generated
global vertex. (offline discussion: also add a SIM vertex with 3D smearing on X/Y/Z)
Chris: would we need a new branch for timing, rather than tagging on vertex for timing?
Jin: With a fully implemented TOF detector (as one option for ePHENIX), we would be able to tag different time of each vertex down to precession
of <10 ps.
Consensus: keep the time tag on vertex for future use.
Chris: displaced/secondary vertex would be needed in the future.
Mike: on TODO list, pre-CDR
Mike McCumber : update on evaluator
A new tier of object to decode truth information for evaluation use. Merged to master through pull request:
https://github.com/sPHENIX-Collaboration/coresoftware/pull/27
Example to use of the objects in user code would be the generic evaluator ntuple maker:
https://www.phenix.bnl.gov/WWW/offline/doxygen_sPHENIX/html/dd/d59/classCaloEvaluator.html
Jin: Following mike's point on performance check, it would be useful tool to check build/performance for each pull request, to help making
decision on merging pull requests.
Martin: From past projects, another useful way to check compatibility of pull requests would be a daily merging of all pull request into
an incoming branch and check its build.
Action Item [Jin/Martin/Chris]: further develop
the pull-request-QA concept offline and try to implement one for sPHENIX (discussion started after meeting).
Jin Huang: EMCal updates
Page 9: three pre-CDR clusterizer concept was discussed.
Ideal clusterizer:
Megan Connors: circle around track may be too artificial in pattern recognition performance.
Jin: also good baseline.
FastJet as EMCal clusterizer:
Rosi Reed (from EMCal meeting on Mon): FastJet require circular shape, would not work well for elliptical clusters.
Mike : expect poor performance on spliting clusters with Anti-KT
Megan/Jin: we can also try kT and Guass filter algorithm under FastJet too.
Ed/Chris: update the pre-CDR plot list with names.
Action Item [Jin]: Update the slides with the EMCal
plot list with names assigned (done).
Action Item [John L.] : plan to send around the
Hcal plot list
Ron: TPC update
Page 2:
Tony: add another intermediate layer silicon detector?
Ron: Will be good to study
Page 5:
Tony: real decider for the inner radius limit could be the pattern recognition. 500 HIJING might tell us that.
Ron: study in progress. (see next slides)
Page 6:
Ed: E field requirement would strongly affect cage design, which is a challenging task. Guidance from gas choice/simulation study would be
helpful.
Ron: Ne/CF4 require higher voltage. Need volunteer for gas simulation comparisons.
Volunteer Needed : TPC simulation studies (contact
Ron)
Jin: Purity vs multiplicity would be needed for Hijing too
Ron: agree.
Action Item [Tony/Ron]: update the overleaf pre-CDR
document with list of plots planned.
Alan: TPC simulation setup (discussed in the last meeting too)
Page 3:
Ed: Is the ILC TPC the one Klaus worked on?
Alan: Yes.
Ed: Where is the detector?
Alan: somewhere Japan. Similar in dimension to sPHENIX need, very nice reference for us.
Jin: was drift time/Z semaring simulated?
Alan: current use a mock-up Gauss searing. Pulse fit needed for future.
Ed: not a priority for pre-CDR
Jin: Then how merge of tracks in Z/time dimension gets handled?
Alan: handled in merge track hits of the same timing bins.
Page 7:
Alan: What would be the strategy in merging software to handle needs of both TPC and SVX?
Mike: deal with six configuration macro for now. Good to merge the C++ module later.
Tracking in general:
Tony: Will have a post doc at RIKEN to join the tracking simulation study too.
Ron: coordination between different tracking configuration studies.
Mike: should avoid many switching flags, which will be confusing to users. We already pushed subsystem -> separate macros, which leave a
clean interface to users.
Tony: split into the tracking macros into the inner/outer tracker macros parts.
Mike: as the interface to non-tracking experts, still tracking experts should support one tracker.C , which load the inner and outer tracker
macro.
Tony: will do so and follow up with Mike offline.
Action Item [Tony/Mike]: implement the tracker
macros which support six standard configurations for pre-CDR stage.
______________________________
Jin HUANG
Brookhaven National Laboratory
Physics Department, Bldg 510 C
Upton, NY 11973-5000
Office: 631-344-5898
Cell: 757-604-9946
______________________________
Dear All,
This is a reminder that we will have our weekly sPHENIX simulation meeting Tue Sept 1st. Let’s start the meeting with updates on the simulation production/new software features for pre-CDR. More contributions are welcomed too.
The agenda page is at
https://indico.bnl.gov/conferenceDisplay.py?confId=1337 , for which the modification password is
1008
From now to this Dec, we will use a new default room and a new default bridge line:
* 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
______________________________
