Performance of fast-ion loss diagnostic on EAST

The scintillator-based detector for fast-ion loss measurements has been installed on EAST. To obtain high temporal resolution for fast-ion loss diagnostics, fast photomultiplier tube systems have been developed which can supply the complementary measurements to the previous image system with good en...

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Bibliographic Details
Published in:Review of scientific instruments 2018-10, Vol.89 (10), p.10I144-10I144
Main Authors: Wu, C. R., Huang, J., Chang, J. F., Zhang, J., Zhou, R. J., Xu, Z., Gao, W., Isobe, M., Ogawa, K., Lin, S. Y., Hu, L. Q., Li, J. G.
Format: Article
Language:English
Subjects:
Bremsstrahlung
CCD cameras
Diagnostic systems
Electrons
Photomultiplier tubes
Scientific apparatus & instruments
Scintillation counters
Sensors
Temporal resolution
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Summary:The scintillator-based detector for fast-ion loss measurements has been installed on EAST. To obtain high temporal resolution for fast-ion loss diagnostics, fast photomultiplier tube systems have been developed which can supply the complementary measurements to the previous image system with good energy and pitch resolution by using a CCD camera. By applying the rotatable platform, the prompt losses of beam-ions can be measured in normal and reverse magnetic field. The thick-target bremsstrahlung occurring in the stainless steel shield with energetic electrons can produce X-rays, which will strike on the scintillator based detector. To understand this interference on fast-ion loss signals, the effects of energetic electrons on the scintillator-based detector are studied, including runaway electrons in the plasma ramping-up phase and fast electrons accelerated by the lower hybrid wave.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5038782