Abstract
High-energy bremsstrahlung photon emission beyond a critical energy from electron cyclotron resonance (ECR) heating has long attracted much attention, and its nature has yet been unsolved. We have measured bremsstrahlung photons from the 28-GHz ECR ion source at Busan Center of Korean Basic Science Institute. The gamma-ray detection system consists of three NaI(Tl) scintillation detectors placed 62 cm radially from the beam axis and a NaI(Tl) scintillation detector at the extraction port for monitoring the photon intensity along the beam axis. Bremsstrahlung photon energy spectra were measured at nine azimuthal angles at the RF power of 1 kW. Azimuthal angular distributions of bremsstrahlung photons were found to be in coincidence with the structure the ECR ion source and the shape of ECR plasma.
Original language | English |
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Pages (from-to) | 780-784 |
Number of pages | 5 |
Journal | Journal of the Korean Physical Society |
Volume | 71 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2017 Dec 1 |
Keywords
- Bremsstrahlung photons
- ECR ion source
- Microwave power
- NaI(TI) detector
ASJC Scopus subject areas
- Physics and Astronomy(all)