Abstract
The role of energetic electrons during the non-inductive current ramp-up is investigated in electron cyclotron heated plasma (≤ 60kW) in the spherical tokamak QUEST. The pulse height analysis of the hard X-ray (HX) is carried out with a fast time resolution of ≥1 ms, and acceleration of the electrons are studied by measuring the evolution of spectrum. It is found that wall recycling condition affects the formation of the tokamak configuration from an initial open magnetic field configuration. The vertical magnetic field Bz dependence of driven current Ip (~ 11 kA) is compared with those of HXs for studying contribution of fast electron. For high recycling case, Ip and HXs show peaks at an optimal low value of Bz/Bt = 7 ×10-3, however, for low recycling case, both increase monotonically with B z/Bt = 7 ×10-3 - 21×10 -3.
| Original language | English |
|---|---|
| Title of host publication | 37th EPS Conference on Plasma Physics 2010, EPS 2010 |
| Pages | 1716-1719 |
| Number of pages | 4 |
| Publication status | Published - Dec 1 2010 |
| Event | 37th EPS Conference on Plasma Physics 2010, EPS 2010 - Dublin, Ireland Duration: Jun 21 2010 → Jun 25 2010 |
Publication series
| Name | 37th EPS Conference on Plasma Physics 2010, EPS 2010 |
|---|---|
| Volume | 3 |
Other
| Other | 37th EPS Conference on Plasma Physics 2010, EPS 2010 |
|---|---|
| Country | Ireland |
| City | Dublin |
| Period | 6/21/10 → 6/25/10 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
Cite this
The role of fast electrons on the non-inductive current ramp-up in QUEST. / Tashima, S.; Zushi, H.; Isobe, M.; Okamura, S.; Idei, H.; Hanada, K.; Sharma, S. K.; Ryoukai, T.; Ishiguro, M.; Liu, H.
37th EPS Conference on Plasma Physics 2010, EPS 2010. 2010. p. 1716-1719 (37th EPS Conference on Plasma Physics 2010, EPS 2010; Vol. 3).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - The role of fast electrons on the non-inductive current ramp-up in QUEST
AU - Tashima, S.
AU - Zushi, H.
AU - Isobe, M.
AU - Okamura, S.
AU - Idei, H.
AU - Hanada, K.
AU - Sharma, S. K.
AU - Ryoukai, T.
AU - Ishiguro, M.
AU - Liu, H.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - The role of energetic electrons during the non-inductive current ramp-up is investigated in electron cyclotron heated plasma (≤ 60kW) in the spherical tokamak QUEST. The pulse height analysis of the hard X-ray (HX) is carried out with a fast time resolution of ≥1 ms, and acceleration of the electrons are studied by measuring the evolution of spectrum. It is found that wall recycling condition affects the formation of the tokamak configuration from an initial open magnetic field configuration. The vertical magnetic field Bz dependence of driven current Ip (~ 11 kA) is compared with those of HXs for studying contribution of fast electron. For high recycling case, Ip and HXs show peaks at an optimal low value of Bz/Bt = 7 ×10-3, however, for low recycling case, both increase monotonically with B z/Bt = 7 ×10-3 - 21×10 -3.
AB - The role of energetic electrons during the non-inductive current ramp-up is investigated in electron cyclotron heated plasma (≤ 60kW) in the spherical tokamak QUEST. The pulse height analysis of the hard X-ray (HX) is carried out with a fast time resolution of ≥1 ms, and acceleration of the electrons are studied by measuring the evolution of spectrum. It is found that wall recycling condition affects the formation of the tokamak configuration from an initial open magnetic field configuration. The vertical magnetic field Bz dependence of driven current Ip (~ 11 kA) is compared with those of HXs for studying contribution of fast electron. For high recycling case, Ip and HXs show peaks at an optimal low value of Bz/Bt = 7 ×10-3, however, for low recycling case, both increase monotonically with B z/Bt = 7 ×10-3 - 21×10 -3.
UR - http://www.scopus.com/inward/record.url?scp=84875675736&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875675736&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84875675736
SN - 9781622763313
T3 - 37th EPS Conference on Plasma Physics 2010, EPS 2010
SP - 1716
EP - 1719
BT - 37th EPS Conference on Plasma Physics 2010, EPS 2010
ER -