TY - GEN
T1 - Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M
AU - Hanada, K.
AU - Sasaki, K.
AU - MHasegawa,
AU - Idei, H.
AU - Zushi, H.
AU - Nakamura, K.
AU - Sakamoto, M.
AU - Sato, K. N.
AU - Kawasaki, S.
AU - Nakashima, H.
AU - Higashijima, A.
PY - 2006
Y1 - 2006
N2 - A new technique to measure the current profile in lower hybrid current drive (LHCD) plasmas by using hard X-ray (HXR) energy spectrum measurement along the top and bottom identical line of sight (ILOS) is proposed. An angle between ILOS and the magnetic filed line is out of alignment from the perpendicular by the poloidal magnetic field. As the emission cross-section of HXR strongly depends on the angle to the drift direction of energetic electrons, that is the magnetic filed line, this disagreement of the angles makes significant difference between the signals of detectors located on the top and bottom. As the result, the poloidal magnetic field is able to be derived from the difference of the HXR emission along the top and bottom ILOS. The method was applied to the full LHCD plasmas on the TRIMA-1M tokamak and the plasma current around the magnetic axis was estimated.
AB - A new technique to measure the current profile in lower hybrid current drive (LHCD) plasmas by using hard X-ray (HXR) energy spectrum measurement along the top and bottom identical line of sight (ILOS) is proposed. An angle between ILOS and the magnetic filed line is out of alignment from the perpendicular by the poloidal magnetic field. As the emission cross-section of HXR strongly depends on the angle to the drift direction of energetic electrons, that is the magnetic filed line, this disagreement of the angles makes significant difference between the signals of detectors located on the top and bottom. As the result, the poloidal magnetic field is able to be derived from the difference of the HXR emission along the top and bottom ILOS. The method was applied to the full LHCD plasmas on the TRIMA-1M tokamak and the plasma current around the magnetic axis was estimated.
UR - http://www.scopus.com/inward/record.url?scp=84872662524&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84872662524&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84872662524
SN - 9781622763337
T3 - 33rd EPS Conference on Plasma Physics 2006, EPS 2006
SP - 1608
EP - 1611
BT - 33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts
T2 - 33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006
Y2 - 19 June 2006 through 23 June 2006
ER -