Development of the MICROMEGAS detector for measuring the energy spectrum of alpha particles by using a Am-241 source

作者：Kim Do Yoon; Ham Cheolmin; Shin Jae Won; Park Tae Sun; Hong Seung Woo; Andriamonje Samuel; Kadi Yacine; Tenreiro Claudio

来源：Journal of the Korean Physical Society, 2016, 68(9): 1060-1068.

DOI：10.3938/jkps.68.1060

• MICROMEGAS
• Alpha
• Am-241
• GEANT4

We have developed MICROMEGAS (MICRO MEsh GASeous) detectors for detecting a particles emitted from an Am-241 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 a particles from the Am-241 source can be varied by changing the flight path of the a particle from the Am-241 source. The channel numbers of the experimentally-measured pulse peak positions for different energies of the a 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 a particles is done. For the energy calibration, the thickness of the ionization region is adjusted so that a 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 a particles under the present conditions is found to be similar to 97.3%.

• 出版日期2016-5