Author/Authors :
Ochi، نويسنده , , Atsuhiko and Homma، نويسنده , , Yasuhiro and Dohmae، نويسنده , , Takeshi and Kanoh، نويسنده , , Hideaki and Keika، نويسنده , , Tomohiro and Kobayashi، نويسنده , , Seiji and Kojima، نويسنده , , Yohta and Matsuda، نويسنده , , Shinji and Moriya، نويسنده , , Kenji and Tanabe، نويسنده , , Akira and Yoshida، نويسنده , , Keiichi، نويسنده ,
Abstract :
A novel Micro-Pattern Gaseous Detector (MPGD) Micro-Mesh Micro-Pixel Chamber ( M 3 -PIC) has been developed for particle imaging and/or a TPC readout. The M 3 -PIC consists of a micro-pixel chamber ( μ -PIC) and a thin micro-mesh film. An intensive electric field is formed around a point-like anode electrode that provides higher gas gain and more stable operation than existing MPGDs. In addition, ion backflow fraction (IBF) into the detection volume is strongly suppressed. A prototype of this detector ( 3 cm × 3 cm ) has been manufactured and successfully operated. Stable operation with a gas gain of more than 5 × 10 4 was achieved using an Ar : ethane = 50 : 50 gas mixture, and the measured IBF was 0.5%.
Keywords :
MPGD , Micro-pixel gas chamber , TPC , Ion backflow
