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RIS citation export for TUP028: Bremsstrahlung Photons Emission in 28-GHz Electron Cyclotron Resonance Plasma

AU  - Kumwenda, M.J.
AU  - Ahn, J.-K.
AU  - Kim, S.J.
AU  - Lee, J.W.
AU  - Lugendo, I.J.
AU  - Park, J.Y.
AU  - Won, M.
ED  - Conradie, Lowry
ED  - De Villiers, John Garrett
ED  - Schaa, Volker RW
TI  - Bremsstrahlung Photons Emission in 28-GHz Electron Cyclotron Resonance Plasma
J2  - Proc. of Cyclotrons2019, Cape Town, South Africa, 23-27 September 2019
CY  - Cape Town, South Africa
T2  - International Conference on Cyclotrons and their Applications
T3  - 22
LA  - english
AB  - Radial measurements of bremsstrahlung photons show high-energy intensity beyond a critical energy from electron cyclotron resonance (ECR) heating and its nature is not well understood so far. For the first time we have measured the bremsstrahlung photons energy intensity from 28-GHz ECR ion source at Busan Center of KBSI. Three round type NaI(Tl) detectors were used to measure the bremsstrahlung photons emitted at the center of the ECRIS at the same timeThe ECR ion source was operated at Radiofrequency (RF) power of 1 kW to extract 16O beam with a dominant fraction of O³⁺.We studied possible systematic uncertainties from different characteristics among the three NaI(Tl) detectors by repeating measurements alternatively. Geant4 simulation was performed to take the geometrical acceptance and energy-dependent detection efficiency into account due to large non-uniformity in the material budget. We extracted true bremsstrahlung energy spectra from the 28-GHz ECR ion source using the inverse-matrix unfolding method. The high energy intensities of the bremsstrahlung photons at the center of the ECRIS were explained by the internal structure and shape of ECR plasma.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 219
EP  - 222
KW  - photon
KW  - ion-source
KW  - detector
KW  - electron
DA  - 2020/06
PY  - 2020
SN  - 978-3-95450-205-9
DO  - doi:10.18429/JACoW-Cyclotrons2019-TUP028
UR  - http://jacow.org/cyclotrons2019/papers/tup028.pdf
ER  -