Angular distributions of bremsstrahlung photons from ECR plasma
- Authors
- Kumwenda, M. J.; Ahn, J. K.; Lee, J. W.; Lugendo, I. J.; Kim, S. J.; Park, J. Y.; Won, M. S.
- Issue Date
- 12월-2017
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- ECR ion source; Bremsstrahlung photons; NaI(TI) detector; Microwave power
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.71, no.11, pp.780 - 784
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 71
- Number
- 11
- Start Page
- 780
- End Page
- 784
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81469
- DOI
- 10.3938/jkps.71.780
- ISSN
- 0374-4884
- 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.
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