TY - JOUR
T1 - Development of a high energy hydrogen beam injection system for divertor plasma simulation experiments on the DT-ALPHA device
AU - Boonyarittipong, Peerapat
AU - Takahashi, Hiroyuki
AU - Kitajima, Sumio
AU - Okamoto, Atsushi
AU - Tobita, Kenji
AU - Kobayashi, Takahiko
AU - Saikyo, Takeshi
AU - Ishikawa, Yusuke
AU - Ogasawara, Kenta
AU - Hashizume, Hidetoshi
N1 - Funding Information:
The work was partly supported by the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI), 26420848 and Grant-in-Aid for Young Scientists (B) 17K14895
Funding Information:
The work was partly supported by the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI), 26420848 and Grant-in-Aid for Young Scientists (B) 17K14895.
Publisher Copyright:
© 2019 The Japan Society of Plasma Science and Nuclear Fusion Research.
PY - 2018
Y1 - 2018
N2 - Using the SIMION program, we have calculated the trajectories of hydrogen ions to investigate the effects of an E × B filter to be used for hydrogen ion beam injection experiments. The geometry we have utilized for the simulation matches the ion beam transport system of the DT-ALPHA device. Before investigating the hydrogen ion trajectories, we calculated helium ion trajectories and compared the results with experiments using a helium ion beam to confirm the results of the SIMION calculations. We then calculated the trajectories of the hydrogen ions H+, H2+, and H3+ . We found that the electric field required to select an H+ ion beam differs from that obtained from a theoretical calculation, and we interpret this as a result of the fringe fields of the E × B filter. We have also evaluated the H+ ion beam size at the ion entrance aperture using SIMION. This calculation indicates that spreading of the hydrogen ions along the electric and magnetic fields differs because of non-homogeneous fields and the fringe fields of the filter. In addition, we have investigated the trajectories and beam sizes of He+ ion beams, we found that the E × B filter has no significant influence on the He+ ion beam experiments.
AB - Using the SIMION program, we have calculated the trajectories of hydrogen ions to investigate the effects of an E × B filter to be used for hydrogen ion beam injection experiments. The geometry we have utilized for the simulation matches the ion beam transport system of the DT-ALPHA device. Before investigating the hydrogen ion trajectories, we calculated helium ion trajectories and compared the results with experiments using a helium ion beam to confirm the results of the SIMION calculations. We then calculated the trajectories of the hydrogen ions H+, H2+, and H3+ . We found that the electric field required to select an H+ ion beam differs from that obtained from a theoretical calculation, and we interpret this as a result of the fringe fields of the E × B filter. We have also evaluated the H+ ion beam size at the ion entrance aperture using SIMION. This calculation indicates that spreading of the hydrogen ions along the electric and magnetic fields differs because of non-homogeneous fields and the fringe fields of the filter. In addition, we have investigated the trajectories and beam sizes of He+ ion beams, we found that the E × B filter has no significant influence on the He+ ion beam experiments.
KW - Divertor
KW - Hydrogen
KW - Ion beam transport
KW - Ion-trajectory simulation
KW - Volumetric recombination
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U2 - 10.1585/PFR.13.3402102
DO - 10.1585/PFR.13.3402102
M3 - Article
AN - SCOPUS:85069971941
SN - 1880-6821
VL - 13
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
M1 - 3402102
ER -