Measurement of the electron transmission rate of the gating foil for the TPC of the ILC experiment
arXiv:1903.01717 · doi:10.1016/j.nima.2018.11.060
Abstract
We have developed a gating foil for the time projection chamber envisaged as a central tracker for the international linear collider experiment. It has a structure similar to the Gas Electron Multiplier (GEM) with a higher optical aperture ratio and functions as an ion gate without gas amplification. The transmission rate for electrons was measured in a counting mode for a wide range of the voltages applied across the foil using an $^{55}$Fe source and a laser in the absence of a magnetic field. The blocking power of the foil against positive ions was estimated from the electron transmissions.
25 pages containing 14 figures and 1 table