Investigating the performance of an ion luminescence probe as a multichannel fast-ion energy spectrometer using pulse height analysis

We investigate the capability of a fast-ion luminescent probe to operate as a pulse height ion energy analyzer. An existing high sensitivity system has been reconfigured as a single channel ion detector with an amplifier to give a bandwidth comparable to the phosphor response time. A digital pulse p...

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Bibliographic Details
Published in:Review of scientific instruments 2012-10, Vol.83 (10), p.10D306-10D306
Main Authors: Zurro, B, Baciero, A, Jiménez-Rey, D, Rodríguez-Barquero, L, Crespo, M T
Format: Article
Language:English
Subjects:
AMPLIFIERS
Channels
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY SPECTRA
Energy use
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Ion detectors
IONS
LUMINESCENCE
PHOSPHORS
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
Pulse height
PULSES
SENSITIVITY
SPECTROMETERS
STELLARATORS
TIME RESOLUTION
Walls
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Summary:We investigate the capability of a fast-ion luminescent probe to operate as a pulse height ion energy analyzer. An existing high sensitivity system has been reconfigured as a single channel ion detector with an amplifier to give a bandwidth comparable to the phosphor response time. A digital pulse processing method has been developed to determine pulse heights from the detector signal so as to obtain time-resolved information on the ion energy distribution of the plasma ions lost to the wall of the TJ-II stellarator. Finally, the potential of this approach for magnetic confined fusion plasmas is evaluated by studying representative TJ-II discharges.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4733572