1999 Fiscal Year Final Research Report Summary
Physics of Relaxation in Coaxial Helicity Injection
| Project/Area Number |
09045057
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B).
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Nuclear fusion studies
|
|---|
| Research Institution | Himeji Institute of Technology |
|---|
Principal Investigator |
UYAMA Tadao Himeji Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (00093378)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
FUKUMOTO Naoyuki Himeji Institute of Technology, Faculty of Engineering, Research Associate, 工学部, 助手 (90275305)
NAGATA Masayoshi Himeji Institute of Technology, Faculty of Engineering, Assciate professor, 工学部, 助教授 (00192237)
|
|---|
| Project Period (FY) |
1997 – 1999
|
| Keywords | Current Drive / Spherical Tours / Coaxial Helicity Injection / Magnetic fluctuation / Self-organization / Relaxation / Plasma flow / Ion heating |
|---|
| Research Abstract |
In 1999 fiscal year, a possible mechanism for current drive in spherical tours configurations with coaxial helicity injection (CHI) has been studied at the University of Washington in collaboration with Himeji Institute of Technology. Measurements using a 1m, resolution of 0.09 A, Ion Doppler Spectrometer (IDS), which was carried from Himeji Institute of Technology in 1998 fiscal year, have been made on the Helicity Injected Torus-II (HIT-II) at the University of Washington. The data from the IDS have been used to determine temperature for various ion species and toroidal ion flow velocities. Results showed that ion temperature is 〜100 ev(OV) in the plasma core and 〜30 eV(CIII) at the plasma edge and ion flow velocities are 10〜20 km/s. The measured axial and toroidal flows are correlated with a high frequency (50 kHz) n=1 mode. A dynamo model for current drive, where the electrons on the separatrix are tied to a rotating n=1 mode, is presented and its predictions compared with experimental results.
|
