In:
Nuclear Fusion, IOP Publishing, Vol. 49, No. 10 ( 2009-10-01), p. 104012-
Abstract:
Significant experimental advances have been made on the HL-2A tokamak along with substantial improvement and development of the hardware. A spontaneous particle transport barrier has been observed in Ohmic discharges without any external momentum input. The barrier was evidenced by a density perturbation study using modulated supersonic molecular beam injection (SMBI) and microwave reflectometry. The new features of the non-local transport effect induced with SMBI have been analysed. The three-dimensional spectral structures of the low frequency zonal flow, the geodesic acoustic mode (GAM) and the quasi-mode-like low frequency fluctuations have been observed simultaneously for the first time. In addition, the spectral structure of the density fluctuations of GAM was also identified. The e-fishbone instability excited by energetic electrons deviated from Maxwellian distribution has been investigated via a 10-channel CdTe hard x-ray detector. It was found that the e-fishbone was correlated with the existence of energetic electrons of 30–70 keV. The MHD experiment has indicated that the suppression of m / n = 2/1 tearing modes may be sustained by ECRH modulation at a frequency of about 10 Hz.
Type of Medium:
Online Resource
ISSN:
0029-5515
,
1741-4326
DOI:
10.1088/0029-5515/49/10/104012
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2009
detail.hit.zdb_id:
2104963-4
detail.hit.zdb_id:
2037980-8
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