Progress in MHSP electron multiplier operation
Progress in MHSP electron multiplier operation
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MHSP电子倍增器运行进展
DOI：
10.1109/tns.2004.832606
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
J. Santos
中科院分区：
文献类型：
--
作者：
J. M. Maia;D. Mörmann;A. Breskin;R. Chechik;J. Veloso;J. Santos
微孔板气体电子倍增器（MHSP）作为一个独立的设备或与级联的气体电子倍增器（GEMs），用于X射线和紫外光子探测的研究。在Ar/5%H2O中工作的MHSP对5.9 keV的X射线产生了10/sup 4/以上的增益和约14%FWHM的能量分辨率。在Ar/5%CH/sub 4/中工作的3-GEM/MHSP气体光电倍增管的增益高达10/sup 7/;到第一GEM顶部的离子回流分数可以降低到使用楔条读出阴极上的雪崩离子引起的信号执行的2D成像的0.22%，放置在靠近阳极条的位置，对于5.9 keV的X射线，产生了200至250 μm FWHM量级的位置分辨率。
The Micro-Hole & Strip-Plate gas electron multiplier (MHSP) was studied as a stand-alone device or in combination with a cascade of Gas Electron Multipliers (GEMs), for x-ray and UV-photon detection. An MHSP operating in Ar/5%Xe yielded gains above 10/sup 4/ and energy resolutions of about 14% FWHM for 5.9-keV x-rays. Gains as high as 10/sup 7/ were reached in a 3-GEM/MHSP gaseous photomultiplier operating in an Ar/5%CH/sub 4/; the ion-backflow fraction to the top of the first GEM could be reduced down to ∼2% 2D-imaging performed using signals induced by avalanche ions on a Wedge-and-Strip readout cathode, placed at close proximity of the anode strips yielded position resolutions of the order of 200 to 250 μm FWHM for 5.9-keV x-rays.