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Development of magnetic field measurement system for AMS cyclotron
남궁호,최효정,미트라게게르치,하동협,Mustafa Mumyapan,채종서,이종철,송호승 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.8
A high-accuracy magnetic field measurement device based on a cyclotron is being developed for accelerator mass spectrometry (AMS). In this study, a magnetic field measurement device consisting of a Hall probe sensor, piezo-motor, and step motor was developed to measure the magnetic field of the AMS cyclotron magnet. The Hall probe sensor was calibrated to achieve positional accuracy by using polar coordinates. The measurement results between the ratchet gear and piezo-motor, which are the instruments used for driving the measurement device, were analyzed. The measurement result of the device with a piezo-motor exhibits a difference of 5 Gauss (0.04%) as compared with the simulation result.
Optimal design and fabrication of a RF cavity for accelerator mass spectrometry system cyclotron
Ha Donghyup,송호승,Ghergherehchi Mitra,Choi Hyojeong,Shin Seung-wook,Lee Jongchul,Namgoong Ho,Mumyapan Mustafa,채종서 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.8
This study designed a radio frequency (RF) cavity for a cyclotron-based accelerator mass spectrometry (AMS) system. A cyclotron-based AMS system was used to accelerate 12C−, 13C−, and 14C− particles. The experiment results confrmed that three resonant frequencies of the designed RF cavity accelerated the three particles. The RF cavity was a quarter-wavelength resonator (QWR) type and had an external inductor–capacitor (LC) circuit. The operating frequency range of the fabricated RF cavity was 8.5–10 MHz with coupling coefcients of 0.86, 0.99, and 1.11 at resonant frequencies of 8.85, 9.17, and 9.52 MHz, respectively. The refected power at each frequency was less than 1%.