Supported by National Natural Science Foundation of China(11375094,U1332207,11120101004);by Tsinghua University Initiative Scientific Research Program
The non-uniformity effect of the inter-foil distance has been studied using a gaseous electron multiplication(GEM) detector with sensitive area of 50mm×50mm. A gradient of the inter-foil distance is introduced by u...
The primary stripper foil's lifetime is very important for high intensity proton accelerators. Besides high temperature, the wrinkle of the stripper foil is also harmful for the lifetime and the injection emciency. H...
Supported by National Natural Science Foundation of China(11205185,11175020,11175193)
The China Spallation Neutron Source (CSNS) uses H- stripping and phase space painting metnocl co fill a large ring acceptance with a small emittance linac beam. The dependence of the painting beam on the injection b...
Supported by National Natural Science Foundation of China(10975090);Major State Basic Research Development Pro-gram(2008CB817702)
In a TPC, ion feedback from the readout detector can cause a space-charge effect and distort the electrical field in the drift region. Gating is one of the effective methods to solve this problem, which can block ions...
Support by Youth Found of Institute of High Energy Physics,Chinese Academy of Sciences
THGEM with resistive Kapton electrodes (RETGEM) has been developed to make the THGEM more tolerant to discharges. At higher gains with resistive electrodes, serious discharges may travel to the streamer mode, in con...