Measurement of dE/dx resolution of TPC prototype with gating GEM exposed to an electron beam

Abstract

The Time Projection Chamber (TPC) can identify particle species using the energy loss (dE/dx) measured by the readout pad rows. The dE/dx resolution for the ILD (International Large Detector) -TPC for the International Linear Collider experiment is expected to have high resolution for clear identification. The dE/dx resolution of our prototype TPC with gating device (gating GEM) to suppress ions feedback was measured using the electron test beam in a magnet field at the facility in DESY. The dE/dx resolution for ILD-TPC was estimated using this test beam data. The signal charge was measured as a function of the incident angle of the beam. In this paper, we report on the measurement of the signal charge and of the dE/dx resolution.

8 pages, 15 figures, Talk presented at the International Workshop on Future Linear Colliders (LCWS2017), Strasbourg, France, 23-27 October 2017. C17-10-23.2

Cited by in corpus (2)

• Double-hit separation and dE/dx resolution of a time projection chamber with GEM readout
• A novel method to measure the dE/dx resolution of a TPC prototype using 266 nm UV laser