A new MPGD design: Micro-mesh micro-pixel chamber

✍ Scribed by Ochi, Atsuhiko; Homma, Yasuhiro; Dohmae, Takeshi; Kanoh, Hideaki; Keika, Tomohiro; Kobayashi, Seiji; Kojima, Yohta; Matsuda, Shinji; Moriya, Kenji; Tanabe, Akira; Yoshida, Keiichi

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 412 KB
• Volume: 604
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2009.01.065

✦ Synopsis

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 (m-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 ¼ 50 : 50 gas mixture, and the measured IBF was 0.5%.