Development of a time projection chamber using gas electron multipliers (GEM–TPC)

Abstract

We developed a prototype time projection chamber using gas electron multipliers (GEM-TPC) for high energy heavy ion collision experiments. To investigate its performance, we conducted a beam test with 3 kinds of gases (Ar(90%)-CH 4 (10%), Ar(70%)-C 2 H 6 (30%) and CF 4 ). Detection efficiency of 99%, and spatial resolution of 79 µm in the pad-row direction and 313 µm in the drift direction were achieved. The test results show that the GEM-TPC meets the requirements for high energy heavy ion collision experiments. The configuration and performance of the GEM-TPC are described.

Study of a TPC prototype with GEM readout

“…7 presents the results of transverse resolution for P10 gas. At short drift length, the resolution is better or close to results from other prototypes [9] [10] . With the increase of drift distance, the diffusion is getting larger, and the result is getting deviated from the fitting curve ( ) Fig.…”

The gas electron multiplier (GEM): Operating principles and applications

“…47 [90]; due to the higher drift velocity, the longitudinal resolution is instead worsened. Tempting also because of nonflammability and reduced sensitivity to background neutrons, CF 4 -based mixtures are however more difficult to use due to the higher voltage required for operation, as shown by a comparison of gain and discharge rate for a TPC with Triple-GEM readout for Ar-CH 4 and Ar-CF 4 (Fig.…”

Adaptive multitrack reconstruction for particle trajectories based on fuzzy c-regression models

“…Several prototypes TPC for ILC have been constructed and tested in the past few years. The spatial resolution of these prototypes is about 100 µm, a minimal spatial resolution of (53±5) µm was measured by Kaminski [20] and the result given by Oda [21] is 79 µm. Another prototype TPC was tested by Yulan LI [22] and a 100 µm spatial resolution was achieved.…”