Cyclotrons2019 - List of Authors (Kumwenda, M.J.)

Paper	Title	Page
TUP028	Bremsstrahlung Photons Emission in 28-GHz Electron Cyclotron Resonance Plasma	219
	M.J. Kumwenda, I.J. Lugendo Korea University, Seoul, Republic of Korea J.-K. Ahn, J.W. Lee Pusan National University, Pusan, Republic of Korea S.J. Kim, J.Y. Park, M. Won Korea Basic Science Institute, Busan, Republic of Korea
	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.
	Poster TUP028 [1.240 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP028
About •	paper received ※ 13 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Bremsstrahlung Photons Emission in 28-GHz Electron Cyclotron Resonance Plasma

219

M.J. Kumwenda, I.J. Lugendo
Korea University, Seoul, Republic of Korea
J.-K. Ahn, J.W. Lee
Pusan National University, Pusan, Republic of Korea
S.J. Kim, J.Y. Park, M. Won
Korea Basic Science Institute, Busan, Republic of Korea

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.

Poster TUP028 [1.240 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP028

About •

paper received ※ 13 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)