A Beam Test of Prototype TPCs using Micro-Pattern Gas Detectors at KEK

TL;DR

This paper reports on beam tests of prototype Time Projection Chambers (TPCs) with different micro-pattern gas detectors at KEK, demonstrating successful operation and preliminary spatial resolution results relevant for the ILC experiment.

Contribution

It presents the first beam test results of prototype TPCs equipped with MWPC, MicroMEGAS, and GEMs, and discusses their potential performance for the ILC.

Findings

Prototype TPCs operated successfully under test conditions.

Preliminary spatial resolution results obtained with GEMs and MicroMEGAS.

Extrapolation of spatial resolution to large TPCs for ILC.

Abstract

We conducted a series of beam tests of prototype TPCs for the International Linear Collider (ILC) experiment, equipped with an MWPC, a MicroMEGAS, or GEMs as a readout device. The prototype operated successfully in a test beam at KEK under an axial magnetic field of up to 1 T. The analysis of data is now in progress and some of the preliminary results obtained with GEMs and MicroMEGAS are presented along with our interpretation. Also given is the extrapolation of the obtained spatial resolution to that of a large TPC expected for the central tracker of the ILC experiment.