Double-hit separation and dE/dx resolution of a time projection chamber with GEM readout

Abstract

A time projection chamber (TPC) with micropattern gaseous detector (MPGD) readout is investigated as main tracking device of the International Large Detector (ILD) concept at the planned International Linear Collider (ILC). A prototype TPC equipped with a triple gas electron multiplier (GEM) readout has been built and operated in an electron test beam. The TPC was placed in a 1 T solenoidal field at the DESY II Test Beam Facility, which provides an electron beam up to 6 GeV/c. The performance of the readout modules, in particular the spatial point resolution, is determined and compared to earlier tests. New studies are presented with first results on the separation of close-by tracks and the capability of the system to measure the specific energy loss dE/dx. This is complemented by a simulation study on the optimization of the readout granularity to improve particle identification by dE/dx.

29 pages, 30 figures, 6 tables. This is the Accepted Manuscript version of an article accepted for publication in Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1748-0221/17/11/P11027

References in corpus (4)

• TPC Performance in Magnetic Fields with GEM and Pad Readout
• A Lightweight Field Cage for a Large TPC Prototype for the ILC
• Measurement of the electron transmission rate of the gating foil for the TPC of the ILC experiment
• Measurement of dE/dx resolution of TPC prototype with gating GEM exposed to an electron beam

Cited by in corpus (2)

• Probing gauge-Higgs Unification models at the ILC with quark-antiquark forward-backward asymmetry at center-of-mass energies above the Z mass
• TPC development by the LCTPC collaboration for the ILD detector at ILC