Associate Laboratory Director for Nuclear and Particle Physics

Building 510F

P.O. Box 5000

Upton, NY 11973-5000

Phone 631.344.3421

Fax 631.344.5820

hgao@bnl.gov

managed by Brookhaven Science Associates
for the U.S. Department of Energy

www.bnl.gov

TPC Outer Tracker (TPOT) Technical Review

January 26, 2022
Charge to the Review Committee

The TPC Outer Tracker, TPOT, is a Micromegas Tracking detector proposed as an upgrade to the sPHENIX Time Projection Chamber (TPC) to provide a fixed space point on particle trajectories to assist in the reconstruction of rapidly fluctuating space-charge distortions in the TPC volume.

The purpose of this review is to assess the technical feasibility of the TPOT upgrade for the descoped option of the TPOT (installation of eight micromegas modules in FY22 instead of 26 modules installed in FY22 and FY23), and to assess the risks that the TPOT introduces to sPHENIX.

In carrying out its review, the review committee is requested to consider the following questions:

Are the technical details of the TPOT for installation and integration in sPHENIX sufficiently mature?

Is the gas system properly understood and at a level of maturity that will ensure safe operation of the TPOT and sPHENIX?

Is the schedule of the TPOT sufficiently well understood and matched to the plan for installation in sPHENIX?

Are the risks introduced by the TPOT upgrade into the successful operation of sPHENIX well understood, and are sufficient plans to mitigate these risks in place?

Are the interfaces and integration with sPHENIX and RHIC well understood?

Is the ES&H properly managed?

Are the costs of the TPOT sufficiently well understood, and are the resource needs required to complete the TPOT upgrade fully identified?

The review will take place remotely on January 26, 2022. A close out will be presented to the sPHENIX team and NPP management prior to adjourning. A report should be sent to my office by close of business on February 2, 2022.

I very much appreciate your willingness to lend your time and expertise to this important step in the sPHENIX TPOT review process and look forward to receiving your assessment.

Review Committee

TPC/design/electronics/gas system

Flemming Videbaek (BNL)

Nikolai Smirnov (YALE)

Vinnie Polychronakos (BNL)

Bo Yu (BNL)

Integration/installation/readout

Russell Federer (BNL)

Rahul Sharma (BNL)

Dave Lynn (BNL)

Jack Fried (BNL)

Sincerely,

Haiyan Gao

Associate Laboratory Director for Nuclear and Particle Physics