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Report No.

Development of micro-strip gas chamber with individual readout

Nakamura, Tatsuya  ; Masaoka, Sei; Yamagishi, Hideshi; Soyama, Kazuhiko  ; Aizawa, Kazuya  

Development of a Micro-Strip Gas Chamber(MSGC) in JAERI is presented. The performances we aim at are counting rate $$>$$10$$^{6}$$${it cps/mm}$$$^{2}$$, position resolution $$<$$1${it mm}$, detection efficiency $$>$$60% at thermal neutron and good n/gamma discrimination. Our two-dimensional gas detector consists of a micro strip plate printed on a polyimide substrate and a high pressure gas chamber which has all the signal lines are directly taken out (256ch individual readout) and withstands the pressure of 10bar $$^{3}$$${it He}$. The individual signal readout opens the way to realize high counting rate and high position resolution at the same time. We carried out range measurements of secondary particles to confirm the range measuring power of the MSGC with that read out method. The measured ranges in the gas of 3bar helium mixed with $$10%$$ ethane is 3mm, 9.5mm for triton and proton, respectively. Those values are well agreed with theoretical estimation and we could show the feasibility of the precise measurement of the ranges by the MSGC.



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