| Paper | Title | Page |
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MODO02 |
Angular Distributions of Bremsstrahlung X-ray Emission from ECR Plasma | |
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| High-energy X-ray emission beyond a critical energy from ECR heating has long attracted much attention and its nature has yet been unsolved. We have measured bremsstrahlung X-rays from the 28-GHz ECR ion source at Busan Center of KBSI. The gamma-ray detection system consists of three NaI(Tl) scintillation detectors placed 55 cm radially from the beam axis at the extraction port, and a NaI(Tl) scintillation detector for monitoring X-ray intensity at the beam axis. Bremsstrahlung X-ray energy spectra were measured at 9 azimuthal angular regions at RF power of 1kW. We also measured bremsstrahlung X-rays by exchanging detector positions for studying systematic uncertainties. Detection efficiency and shielding effect are taken into account for extracting real X-ray energy spectra from measured ones, based on Geant4 simulation results. Preliminary results on the azimuthal angular distributions of bremsstrahlung X-rays with respect to energy region will be presented. | ||
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