Arrangement for SMBI in the HL-2A tokamak.
Schematic view of runaway measurement systems in HL-2A including two channel NaI hard x-ray detection systems, a set of fission chamber neutron detection system, and a SDD X-ray PHA system.
Waveforms of ECRH discharge No.6345: (a) plasma current , (b) central line-averaged electron density , (c) plasma loop voltage , (d) electron temperature obtained by the SDD x-ray PHA system, (e) soft x-ray radiation intensity SXR, (f) hard x-ray radiation intensity HXR, and (g) neutron emission (accumulation counts per 1 ms). The shaded area in (d) indicates the time interval in which ECRH is applied.
Time evolution of electron velocity distributions before, during, and after ECRH for discharge No. 6345.
Typical x-ray spectra during OH phase and ECRH phase with/without SMBI.
Time traces of the critical energy for superthermal electron avalanche for discharge No. 6345. The horizontal broken line indicates that the energy can be extended by superthermal electrons during OH phase.
Time traces of the critical energy for runaway for discharge No. 6345. The horizontal broken line indicates that the energy can be extended by superthermal electrons created by ECRH.
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