Angular distributions of bremsstrahlung photons from ECR plasma

M. J. Kumwenda; J. K. 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, J. K. 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 › peer-review

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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@article{323f8e8fd40a40f9980b7c49ed38a71f,

title = "Angular distributions of bremsstrahlung photons from ECR plasma",

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, {J. K.} and Lee, {J. W.} and Lugendo, {I. J.} and Kim, {S. J.} and Park, {J. Y.} and Won, {M. S.}",

note = "Funding Information: The authors would like to gratefully acknowledge support by National Research Foundation of Korea and Korea University. Publisher Copyright: {\textcopyright} 2017, The Korean Physical Society.",

year = "2017",

month = dec,

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doi = "10.3938/jkps.71.780",

language = "English",

volume = "71",

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journal = "Journal of the Korean Physical Society",

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T1 - Angular distributions of bremsstrahlung photons from ECR plasma

AU - Kumwenda, M. J.

AU - Ahn, J. K.

AU - Lee, J. W.

AU - Lugendo, I. J.

AU - Kim, S. J.

AU - Park, J. Y.

AU - Won, M. S.

N1 - Funding Information: The authors would like to gratefully acknowledge support by National Research Foundation of Korea and Korea University. Publisher Copyright: © 2017, The Korean Physical Society.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - 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.

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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U2 - 10.3938/jkps.71.780

DO - 10.3938/jkps.71.780

M3 - Article

AN - SCOPUS:85035143534

VL - 71

SP - 780

EP - 784

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - 11

ER -

Angular distributions of bremsstrahlung photons from ECR plasma

Abstract

Keywords

ASJC Scopus subject areas

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