sPHENIX is a new detector at RHIC.

[David Morrison <dave AT bnl.gov>]

Dear collaborators,

Thanks to Jin Huang, here are sPHENIX fortnightly meeting minutes from Friday, June 22, 2016.

Regards,

Dave

sPHENIX update - Gunther Roland, Dave Morrison

 

Preparation of tracker review

·       Sept 7-9, 2016 @ BNL

·       Demonstrate tracking performance and physics capability from topical groups

 

Gunther/Tony: Need conclusive proof that suitable solution proposed are suitable for full physics program

Dave: this charge differs from baseline scope charge – it  doesn’t demand that tracker be strictly restricted to just DOE funding.

 

Collaboration meeting

·       Proposed date: Dec 14-16 @ GSU.

·       Tom/Tony/Jamie: conflict of finals weeks.

·       Gunther:  Doodle poll to optimize

 

Other news

·       Major step for MAPS project, success award of LDRD received by LANL group!

·       Expect a cost & schedule review later this year

·       Public speaking instructions from ALD: “$30M-$34M” upgrade and don’t get drawn into discussion of redirected RHIC operations. 
Coordinating RHIC S&T review and fall conferences

·       Continue development of physics cases: Small workshop at MIT on Oct 28-29

·       Cold QCD topical group is forming

·       sPHENIX survey/census to come via email

·       Test beam analysis and paper progress

 

Project news - Ed O’Brien

 

Recent progress

·       SC-Magnet valve box extension is now in BNL Central shops

·       Calorimeter digitizer is making good progress at Nevis

·       Prepared Closed bid on the full size OHCal prototype

·       High eta tiles design to UNIPLAST, product coming early Oct

·       R&D progresses in TPC and EMCal

o   Considerations of 3D printing technology for EMCal molds at universities

 

On-going and coming events

·       PHENIX Removal and Repurposing in preparation for sPHENIX - making good progress

·       Mini-reviews and workfests - June - August

·       DOE S&T review of RHIC including sPHENIX – August

·       TPC electronics mini-review -August

·       Order full-size OHCal mechanical prototype – August

·       BNL-charged Tracker review – September

·       Prepare for next sPHENIX Cost and Schedule review – Late Fall CY16

·       FNAL Test beam – Jan 2017

·       Full field SC-magnet test – Jan 2017

 

Tracking status - Anthony Frawley, Michael McCumber

 

Proposing focusing effort on tracking options that are well understood:

·       Inner barrel composed of MAPS detectors

·       TPC outer tracker

·       Intermediate tracker if needed. Need study pro and cons.

On-going development for review:

·       Event pile up

·       TPC software clean up and improve cluster error handling

·       TPC hardware

·       MAPS hardware

·       Evaluation of intermediate tracker in simulation

 

Tony, Jin, Ed: Plan to base review on cylindrical silicon tracker geometry, and realistic ladder geometry development is not top priority toward the coming tracking review. Nevertheless, extra man-power developing on this direction is encouraged. Good to show work-in-progress in the review.

Gunther, Tom, Tony: intermediate tracker provides redundancy towards unknowns. Optimization needed

 

Tracker review preparation by Topical Groups (TG)

 

Jet structure TP

·       Planning Jet MC sample

·       Demonstrate FF, flow jets performance

·       Software tasks:

o   Track-cluster tracking to improve purity

o   Fake jet rejection suing tracking

o   Flavor dependency

o   Unfolding test

o   Quenching modeling in event generation

·       Long term development on-going. Join next meeting on Tue.

 

Jin: Need to optimize storage of embedded event before embedding production. CPU cost ~3min/event for sim + event + reco

 

HF-jet TP

·       B-tagging with track counting

o   Dennis produced initial study of track counting in Geant4

o   As Dennis’ is busy over next a few weeks, volunteer need to help

·       Hopefully, a second B-tagging with secondary vertex tagger,

o   Further development from many recent positive progress from Sanghoon and Haiwang by implementing the RAVE vertex finder

·       HIJING embedded study also planned

  

Upsilon TP

·       Background estimation

o   On-going study

o   Meeting next Tue for background estimates

·       Intermediate tracker mass effect

o   4% thickness would be very challenging to mass resolution

o   Further study needed.

 

General comment

·       Will determine deadline for new information contribution to tracker review

David Morrison Brookhaven National Laboratory phone: 631-344-5840
Physics Department, Bldg 510 C email: dave AT bnl.gov
Upton, NY 11973-5000

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