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Enhanced production of runaway electrons during electron cyclotron resonance heating and in the presence of supersonic molecular beam injection in the HL-2A tokamak
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10.1063/1.3457922
/content/aip/journal/pop/17/7/10.1063/1.3457922
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/7/10.1063/1.3457922
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Arrangement for SMBI in the HL-2A tokamak.

Image of FIG. 2.
FIG. 2.

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.

Image of FIG. 3.
FIG. 3.

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.

Image of FIG. 4.
FIG. 4.

Time evolution of electron velocity distributions before, during, and after ECRH for discharge No. 6345.

Image of FIG. 5.
FIG. 5.

Typical x-ray spectra during OH phase and ECRH phase with/without SMBI.

Image of FIG. 6.
FIG. 6.

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.

Image of FIG. 7.
FIG. 7.

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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/content/aip/journal/pop/17/7/10.1063/1.3457922
2010-07-19
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enhanced production of runaway electrons during electron cyclotron resonance heating and in the presence of supersonic molecular beam injection in the HL-2A tokamak
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/7/10.1063/1.3457922
10.1063/1.3457922
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