Development of Thin Gaseous Ionization Detectors for Measurements of High-energy Hadron Beams

作者：Lee Kyong Sei; Hong Byungsik; Lee Kisoo; Park Sung Keun; Yu Jaehee; Kim Sang Yeol

来源：Journal of the Korean Physical Society, 2014, 64(7): 958-964.

DOI：10.3938/jkps.64.958

• Gas electron multiplier
• Gaseous ionization detector
• Hadron beam
• Beam monitor
• Dose-verification measurement

Thin gaseous ionization detectors have been developed based on a current-integration mode for measurements of high-energy hadron beams. In the present detector R&D, two different types of prototype detectors with an active area of 16 x 16 cm(2), each equipped with 256-signal processing channels, were manufactured and tested with 43-MeV protons provided by the MC50 proton cyclotron at the Korea Institute of Radiological and Medical Science (KIRAMS). The first one was equipped with a single gas electron multiplier (GEM), and the second one was a thin-plane ionization detector without the GEM foil loaded. The linearities of the detector responses for both detectors were examined for various proton-beam intensities. The quantitative accuracies for the channel-response data and for the total detector responses measured for 43-MeV protons were 0.4% and 0.34%, respectively. We conclude from the beam test that operating both types of detectors in the current-integration mode will allow quality measurements of dynamic-mode hadron beams to be performed with accuracies of better than 1%.

• 出版日期2014-4