Performance of a gas avalanche pixel detector of 50 mu m pitch - Archive ouverte HAL Access content directly
Conference Papers IEEE Transactions on Nuclear Science Year : 2000

Performance of a gas avalanche pixel detector of 50 mu m pitch

, , (1) , , ,
1
W.S. Hong
  • Function : Author
H.S. Cho
  • Function : Author
S. Han
  • Function : Author
J. Kadyk
  • Function : Author
V. Perez-Mendez
  • Function : Author

Abstract

We describe the performance of a square micro-dot (MDOT) detector of 50 /spl mu/m pitch, in terms of the defocussing effect and gas gain. Both the count rate variation measurement and the computer simulation showed that the defocussing effect disappeared in the 50 /spl mu/m pitch MDOT. Initial charge build-up on the detector surface was also minimized when the small lateral dimension was combined with a surface coating. The maximum gas gain was limited to /spl sim/1200 due to the small distance available for avalanche multiplication. We also developed a two-level microdot, namely a closed-end gas electron multiplication (CEGEM) chamber. A CEGEM detector having a pitch of 200 /spl mu/m, holes of 40 /spl mu/m width and a spacer layer of 18.5 /spl mu/m thickness showed a maximum gain of /spl sim/400. This gain is expected to increase by increasing the spacer layer thickness and adjusting the hole size.
Not file

Dates and versions

in2p3-00021457 , version 1 (15-10-2001)

Identifiers

Cite

W.S. Hong, H.S. Cho, F. Retiere, S. Han, J. Kadyk, et al.. Performance of a gas avalanche pixel detector of 50 mu m pitch. 1998 IEEE Nuclear Science Symposium Conference Record, Nov 1998, Toronto, Canada. pp.2065-2069, ⟨10.1109/NSSMIC.1998.774817⟩. ⟨in2p3-00021457⟩
7 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More