TY - JOUR
T1 - Gamma-ray measurements in D3He fusion plasma experiments on JET
AU - JET Contributors
AU - Iliasova, M.
AU - Shevelev, A.
AU - Khilkevich, E.
AU - Kazakov, Ye
AU - Kiptily, V.
AU - Nocente, M.
AU - Giacomelli, L.
AU - Craciunescu, T.
AU - Stancar, Z.
AU - Molin, A. Dal
AU - Rigamonti, D.
AU - Tardocchi, M.
AU - Doinikov, D.
AU - Gorini, G.
AU - Naidenov, V.
AU - Polunovsky, I.
AU - Gin, D.
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/5/11
Y1 - 2022/5/11
N2 - Using capabilities of the gamma-ray spectrometry, fusion born alpha-particles were studied in recent D-3He plasma experiments on JET. A substantial population of the alpha-particles was generated in the 3He-rich plasma due to the 3He(D, p)4He reaction. Fast deuterium ions of the neutral beam injection (NBI) heating were accelerated to MeV energies with three-ion scenario D-(DNBI)-3He using radio frequency waves in the ion cyclotron range of frequencies (ICRF). A high reaction rate allowed to measure the alpha-particle production rate and their spatial distribution in the plasma by detecting 16.7-MeV gamma-rays from the 3He(D, γ)5Li reaction, which is a weak branch of 3He(D, p)4He reaction. A branching ratio of gamma-ray transitions to the ground and the first excited states of 5Li was obtained. Due to the beryllium is a main impurity of JET plasmas, intensive gamma-rays from the 9Be(D, nγ)10B, 9Be(D, pγ)10Be and 9Be(α, nγ)12C reactions were observed. Exploitation of the reaction cross-sections and the Doppler shape analysis (DSA) of gamma-lines in the recorded spectra provided the possibility to reconstruct distribution functions of the confined D-ions and the fusion-born alpha-particles.
AB - Using capabilities of the gamma-ray spectrometry, fusion born alpha-particles were studied in recent D-3He plasma experiments on JET. A substantial population of the alpha-particles was generated in the 3He-rich plasma due to the 3He(D, p)4He reaction. Fast deuterium ions of the neutral beam injection (NBI) heating were accelerated to MeV energies with three-ion scenario D-(DNBI)-3He using radio frequency waves in the ion cyclotron range of frequencies (ICRF). A high reaction rate allowed to measure the alpha-particle production rate and their spatial distribution in the plasma by detecting 16.7-MeV gamma-rays from the 3He(D, γ)5Li reaction, which is a weak branch of 3He(D, p)4He reaction. A branching ratio of gamma-ray transitions to the ground and the first excited states of 5Li was obtained. Due to the beryllium is a main impurity of JET plasmas, intensive gamma-rays from the 9Be(D, nγ)10B, 9Be(D, pγ)10Be and 9Be(α, nγ)12C reactions were observed. Exploitation of the reaction cross-sections and the Doppler shape analysis (DSA) of gamma-lines in the recorded spectra provided the possibility to reconstruct distribution functions of the confined D-ions and the fusion-born alpha-particles.
KW - Alpha-particles
KW - Fusion rate
KW - Fusion reaction
KW - Gamma-ray spectrometry
KW - Tokamak plasma
UR - http://www.scopus.com/inward/record.url?scp=85127062464&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2022.166586
DO - 10.1016/j.nima.2022.166586
M3 - Article
AN - SCOPUS:85127062464
SN - 0168-9002
VL - 1031
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 166586
ER -