کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1822829 | 1526388 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tests of gases in a mini-TPC with pixel chip readout
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Gases for potential use as targets for directional dark matter detection were tested in a prototype detector using two sequential Gas Electron Multipliers, or GEMs. The sensitive volume consists of a mini-TPC of 12Â cm length and 7.5Â cm diameter. An FEI3 pixel chip, developed for the ATLAS experiment, was used to produce spatial measurements with high resolution. An Fe55 source produced photoelectrons by X-ray conversions in the sensitive volume, and images of these were recorded by the chip. Spatial resolution plots are shown for the gases, which include the practical electron range of the photoelectrons and the effects of diffusion in the mini-TPC. Avalanche gain and gain resolution measurements were made for the four gases tested, at atmospheric and sub-atmospheric pressures: Ar(70)/CO2(30), CF4, He(80)/CF4(20) and He(80)/isobutane(20).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 738, 21 February 2014, Pages 111-118
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 738, 21 February 2014, Pages 111-118
نویسندگان
S. Vahsen, K. Oliver-Mallory, M. Lopez-Thibodeaux, J. Kadyk, M. Garcia-Sciveres,