TY - JOUR
T1 - Development of 2D potential profile measurements using the heavy ion beam probe on the large helical device
AU - Lhd Experiment Group
AU - Shimizu, Akihiro
AU - Ido, Takeshi
AU - Nishiura, Masaki
AU - Takahashi, Hiromi
AU - Igami, Hiroe
AU - Yoshimura, Yasuo
AU - Kubo, Shin
AU - Shimozuma, Takashi
AU - Kato, Shinji
AU - Yokoyama, Masayuki
N1 - Funding Information:
This study was supported by NIFS under Contract Nos. ULHH 020 and 23, and by JSPS KAKENHI Grant Nos. 25820441, 15K06653 and 16K06946. The authors are grateful for the continuous support from staff in the LHD experiment group.
PY - 2016
Y1 - 2016
N2 - Two-dimensional potential fluctuation profiles were measured with the heavy ion beam probe (HIBP) on the Large Helical Device. For two-dimensional measurements with HIBP, the probe beam energy had to be changed, and subtle adjustment of the beam trajectory along the long beam transport line (~20 m) was required. An automatic beam adjustment system was developed for the beam transport line, and used to easily adjust the probe beam trajectory. Potential fluctuations in the high-frequency range (~200 kHz) were measured, and the probe beam energy was changed shot to shot. Two-dimensional potential phase structures were successfully obtained by analyzing the coherence between potential and magnetic field fluctuation, which is used as a reference signal.
AB - Two-dimensional potential fluctuation profiles were measured with the heavy ion beam probe (HIBP) on the Large Helical Device. For two-dimensional measurements with HIBP, the probe beam energy had to be changed, and subtle adjustment of the beam trajectory along the long beam transport line (~20 m) was required. An automatic beam adjustment system was developed for the beam transport line, and used to easily adjust the probe beam trajectory. Potential fluctuations in the high-frequency range (~200 kHz) were measured, and the probe beam energy was changed shot to shot. Two-dimensional potential phase structures were successfully obtained by analyzing the coherence between potential and magnetic field fluctuation, which is used as a reference signal.
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U2 - 10.1585/pfr.11.2402123
DO - 10.1585/pfr.11.2402123
M3 - Article
AN - SCOPUS:85009801599
VL - 11
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
SN - 1880-6821
IS - 1
M1 - 2402123
ER -