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https://hdl.handle.net/10316/4347| Title: | PACEM: a new concept for high avalanche-ion blocking | Authors: | Veloso, J. F. C. A. Amaro, F. D. Azevedo, C. D. R. Santos, J. M. F. dos Breskin, A. Lyashenko, A. Chechik, R. |
Keywords: | Gaseous electron multipliers; Gaseous photomultipliers; VUV scintillation; Photocathodes | Issue Date: | 2007 | Citation: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 581:1-2 (2007) 261-264 | Abstract: | We present the Photon-Assisted Cascaded Electron Multiplier (PACEM) as a potential alternative for ion back-flow suppression in gaseous cascade electron multipliers. Using a Micro Hole and Strip Plate-Gas Electron Multiplier (MHSP-GEM) configuration, the number of ions flowing back to the scintillation region is about 1.5 ions per primary electron at an optical gain of 6.5 and a drift field of 0.1 kV/cm, and about 10 ions per primary electron at an optical gain of 10 and a drift field of 0.5 kV/cm. These allow reaching ion back-flow values close to 10-4 and 10-5 at typical operation conditions of TPCs and GPMs, respectively. | URI: | https://hdl.handle.net/10316/4347 | DOI: | 10.1016/j.nima.2007.07.101 | Rights: | openAccess |
| Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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| filebaa21dcf52bf44778a5d2d501e39b0b3.pdf | 442.24 kB | Adobe PDF | View/Open |
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