CERN Accelerating science

Article
Report number	arXiv:1605.00791
Title	Development of the MICROMEGAS Detector for Measuring the Energy Spectrum of Alpha Particles by using a 241-Am Source
Author(s)	Kim, Do Yoon (Sungkyunkwan U.) ; Ham, Cheolmin (Sungkyunkwan U.) ; Shin, Jae Won (Sungkyunkwan U.) ; Park, Tae-Sun (Sungkyunkwan U.) ; Hong, Seung-Woo (Sungkyunkwan U.) ; Andriamonje, Samuel (CERN) ; Kadi, Yacine (CERN) ; Tenreiro, Claudio (Talca U.)
Publication	2016-05-07
Imprint	03 May 2016
Number of pages	21
In:	J. Korean Phys. Soc. 68 (2016) 1060-1068
DOI	10.3938/jkps.68.1060
Subject category	Detectors and Experimental Techniques
Abstract	We have developed MICROMEGAS (MICRO MEsh GASeous) detectors for detecting {\alpha} particles emitted from an 241-Am standard source. The voltage applied to the ionization region of the detector is optimized for stable operation at room temperature and atmospheric pressure. The energy of {\alpha} particles from the 241-Am source can be varied by changing the flight path of the {\alpha} particle from the 241 Am source. The channel numbers of the experimentally-measured pulse peak positions for different energies of the {\alpha} particles are associated with the energies deposited by the alpha particles in the ionization region of the detector as calculated by using GEANT4 simulations; thus, the energy calibration of the MICROMEGAS detector for {\alpha} particles is done. For the energy calibration, the thickness of the ionization region is adjusted so that {\alpha} particles may completely stop in the ionization region and their kinetic energies are fully deposited in the region. The efficiency of our MICROMEGAS detector for {\alpha} particles under the present conditions is found to be   97.3 %.
Copyright/License	arXiv nonexclusive-distrib. 1.0

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