Sphenix-tpc-l mailing list

[Klaus Dehmelt <klaus.dehmelt AT stonybrook.edu>]

Hello everyone,

we agreed in yesterdays' TPC-L2/L3 meeting to consider submitting abstracts for posters for QM 2109 and possibly talks for DNP 2019. We are proposing to submit the abstracts as shown below.

Any and all comments are very welcome.

The abstracts for QM are also posted on the Dropbox page.

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QM abstracts:

Title: Testbeam Results for the sPHENIX TPC Prototype

Possible Presenter: TBD

Abstract: A Time Projection Chamber (TPC) will be the central tracking detector in the sPHENIX experiment. Its main task is to provide a high tracking efficiency and excellent momentum resolution for precise upsilon spectroscopy and jet measurements. The TPC will cover the full azimuth and a pseudorapidity range of up to $\pm$ 1.1.

A small scale prototype TPC with a radial extension of 40 cm and a similar drift length has been manufactured which can accommodate a full size amplification module as for the sPHENIX TPC.

The prototype has been exposed to a 120 GeV proton beam at the Fermilab Test Beam Facility (FTBF). The results of the test-beam campaigns including SAMPA readout electronics will be presented.

Title: Central Membrane Studies for the sPHENIX TPC

Possible Presenter: Sourav Tarafdar

Abstract: sPHENIX is an ongoing upgrade to the PHENIX detector which is planned to explore the quark-gluon plasma formed in heavy ion collisions through the measurements of jets and Upsilons at RHIC in the 2020’s. The experiment will feature a charged particle tracking system along with electromagnetic and hadronic calorimeters and also a 1.4 Tesla superconducting solenoid magnet. A TPC with a GEM-based readout will form the core of the sPHENIX tracking system. The central membrane of the TPC is an important part of the TPC and several simulation studies ranging from tracking performance of single particles to jet fragmentation studies were done with different proposed designs of the TPC membrane. The details of these extensive simulation studies on the sPHENIX TPC membrane will be presented here.

Title: Ion Backflow Studies for the sPHENIX TPC

Possible Presenter: TBD

Abstract:  A Time Projection Chamber is the main tracking system for the proposed sPHENIX experiment at RHIC. It will measure space points of charged tracks, which provide the needed momentum resolution to separate the Upsilon states in decays to electrons and positrons. 

The strong magnetic field of the solenoid previously used in the BaBAR experiment, a Neon-based fast gas mixture, and an electric field providing a high drift velocity will mostly compensate for E-field distortions due to ion backflow in the current sPHENIX TPC design. A quadruple GEM stack with special hole patterns or a MicroMegas based amplification is expected to further reduce the ion backflow.

A series of simulations and measurements have been performed to find an optimal configuration and working point for the sPHENIX TPC. In this presentation, we discuss the outcome of this study.

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DNP abstracts: (trying to go for oral presentations)

Title: Studies of Ion Backflow with MPGDs for the sPHENIX TPC

Possible presenter: TBD
Abstract:
The proposed sPHENIX experiment at RHIC will make use of a Time Projection Chamber as the main tracking device. Its main purpose is to obtain the needed momentum resolution to separate the Upsilon states in decays to dilepton pairs by means of measuring the progression of tracks for charged particles. Main ingredients for the minimization of space charge effects in the TPC are a Ne-based gas mixture, an electric field for high drift velocities, and a powerful magnetic field provided by a superconducting solenoid.
In order to further combat space charge distortions due to ion back flow (IBF) from the amplification stage specially designed micropattern gas detector devices have been implemented and tested for their IBF reducing capabilities. The results of simulations, as well as measurements which led to an optimal configuration and working point, will be presented.

Title: Studies of a Central Membrane for the sPHENIX TPC

Possible presenter: Sourav Tarafdar
Abstract:

sPHENIX is a future experiment at RHIC to measure jets and Upsilons for investigating the properties of the quark-gluon plasma formed in heavy ion collisions. As the central tracker it will feature a Time Projection Chamber (TPC) that is used to measure charged particle tracks. The TPC is sandwiched in between inner tracking detectors and electromagnetic and hadronic calorimeters and also a 1.4 Tesla superconducting solenoid magnet.
The TPC will be equipped with micropattern gas detectors for providing the space point resolution and reducing the space charge problem inherent to a TPC. The TPC will also depend on a central membrane which is substantial for supplying a uniform drift field amongst others.
A variety of simulations with different designs of the membrane have been performed ranging from the investigation of the tracking performance to jet fragmentation. In this presentation we will discuss these extensive studies.

Title: Test Beam Campaign with the sPHENIX TPC Prototype

Possible presenter: Henry Klest
Abstract:

The sPHENIX experiment will comprise a Time Projection Chamber (TPC) as the central tracker. It is foreseen to accomplish precise upsilon spectroscopy and jet measurements which in turn require a high tracking efficiency and excellent momentum resolution.
The sPHENIX collaboration produced a small scale prototype TPC which features a full sized module as used in the sPHENIX TPC. This prototype has undergone a test-beam campaign at Fermilab and was immersed to a 120 GeV proton beam. The results of this campaign including the close-to-final readout electronics will be discussed in this presentation.

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Cheers,

Klaus

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Klaus Dehmelt

Stony Brook University

Dept. of Physics and Astronomy

Stony Brook, NY 11794-3800, USA

Office C-108

Phone +1 631 632 8115

E-mail klaus.dehmelt AT stonybrook.edu

My Webpage

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