Angular distributions of bremsstrahlung photons from ECR plasma

M. J. Kumwenda; Jung Keun Ahn; J. W. Lee; I. J. Lugendo; S. J. Kim; J. Y. Park; M. S. Won

doi:10.3938/jkps.71.780

Angular distributions of bremsstrahlung photons from ECR plasma

M. J. Kumwenda, Jung Keun Ahn, J. W. Lee, I. J. Lugendo, S. J. Kim, J. Y. Park, M. S. Won

Department of Physics

Research output: Contribution to journal › Article

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
Pages (from-to)	780-784
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	71
Issue number	11
DOIs	https://doi.org/10.3938/jkps.71.780
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)

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10.3938/jkps.71.780

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Kumwenda, M. J., Ahn, J. K., Lee, J. W., Lugendo, I. J., Kim, S. J., Park, J. Y., & Won, M. S. (2017). Angular distributions of bremsstrahlung photons from ECR plasma. Journal of the Korean Physical Society, 71(11), 780-784. https://doi.org/10.3938/jkps.71.780

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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.",

keywords = "Bremsstrahlung photons, ECR ion source, Microwave power, NaI(TI) detector",

author = "Kumwenda, {M. J.} and Ahn, {Jung Keun} and Lee, {J. W.} and Lugendo, {I. J.} and Kim, {S. J.} and Park, {J. Y.} and Won, {M. S.}",

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AU - Kumwenda, M. J.

AU - Ahn, Jung Keun

AU - Lee, J. W.

AU - Lugendo, I. J.

AU - Kim, S. J.

AU - Park, J. Y.

AU - Won, M. S.

PY - 2017/12/1

Y1 - 2017/12/1

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AB - 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.

KW - Bremsstrahlung photons

KW - ECR ion source

KW - Microwave power

KW - NaI(TI) detector

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