Physics – Instrumentation and Detectors
Scientific paper
2007-06-25
JINST2:P08004,2007
Physics
Instrumentation and Detectors
17 pages, 11 figures, published in JINST
Scientific paper
10.1088/1748-0221/2/08/P08004
A new idea on electrostatic deviation and capture of back-drifting avalanche-ions in cascaded gaseous hole-multipliers is presented. It involves a flipped reversed-bias Micro-Hole & Strip Plate (F-R-MHSP) element, the strips of which are facing the drift region of the multiplier. The ions, originating from successive multiplication stages, are efficiently deviated and captured by such electrode. Experimental results are provided comparing the ion-blocking capability of the F-R-MHSP to that of the reversed-bias Micro-Hole & Strip Plate (R-MHSP) and the Gas Electron Multiplier (GEM). Best ion-blocking results in cascaded hole-multipliers were reached with a detector having the F-R-MHSP as the first multiplication element. A three-element F-R-MHSP/GEM/MHSP cascaded multiplier operated in atmospheric-pressure Ar/CH4 (95/5), at total gain of ~10^{5}, yielded ion back-flow fractions of 3*10^{-4} and 1.5*10^{-4}, at drift fields of 0.5 and 0.2 kV/cm, respectively. We describe the F-R-MHSP concept and the relevance of the obtained ion back-flow fractions to various applications; further ideas are also discussed.
Amaro F. D.
Breskin Amos
Chechik Rachel
dos Santos Joaquim M. F.
Lyashenko A. V.
No associations
LandOfFree
Further progress in ion back-flow reduction with patterned gaseous hole-multipliers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Further progress in ion back-flow reduction with patterned gaseous hole-multipliers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Further progress in ion back-flow reduction with patterned gaseous hole-multipliers will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-230110