Hα measurements and neutral particle transport in Heliotron J
Creators
- Kobayashi, S.1, 2, 3, 4, 5
- Yabutani, H.1, 2, 3, 4, 5
- Nakashima, Y.1, 2, 3, 4, 5
- Higashizono, Y.1, 2, 3, 4, 5
- Nagasaki, K.1, 2, 3, 4, 5
- Mizuuchi, T.1, 2, 3, 4, 5
- Okada, H.1, 2, 3, 4, 5
- Sano, F.1, 2, 3, 4, 5
- Cappa, A.1, 2, 3, 4, 5
- Kondo, K.1, 2, 3, 4, 5
- Nakamura, Y.1, 2, 3, 4, 5
- Suzuki, Y.1, 2, 3, 4, 5
- 1. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292 (Japan)
- 2. Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
- 3. Laboratorio Nacional de Fusion, Asociacion EURATOM-CIEMAT (Spain)
- 4. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
- 5. Plasma Research Center, University Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)
Description
A multichannel system of the Hα-line emission detector is developed in order to investigate the neutral particle transport in the Heliotron J plasma. The application of a multianode photomultiplier tube to the filter measurement system enables us to observe the Hα emission profile with 32 chords. The absolute calibration with a standard lamp is performed and the cross-talk between each of the adjoining channels is evaluated to be less than 6%, while the photomultiplier tube has a typical cross-talk of 3% in nominal value. The temporal and spatial profiles of the Hα emission are measured in detail in the plasma breakdown by electron cyclotron heating (ECH). The Hα emission profile in the ECH plasma is calculated by the Monte Carlo simulation using a three-dimensional mesh model. The fueling rates of the wall recycling and the gas puffing are estimated by means of the simulation and the measurement
Additional details
Identifiers
- DOI
- 10.1063/1.2347621;
Publishing Information
- Journal Title
- Review of Scientific Instruments
- Journal Volume
- 77
- Journal Issue
- 10
- Journal Page Range
- p. 10E527
- ISSN
- 0034-6748
- CODEN
- RSINAK
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38024196
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- COMPUTERIZED SIMULATION; ECR HEATING; EMISSION; HELIOTRON; MONTE CARLO METHOD; NEUTRAL-PARTICLE TRANSPORT; PHOTOMULTIPLIERS; PLASMA; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; PLASMA SIMULATION; RF SYSTEMS; STELLARATORS; THREE-DIMENSIONAL CALCULATIONS; WALL EFFECTS
- Descriptors DEC
- CALCULATION METHODS; CLOSED PLASMA DEVICES; CONFINEMENT; HEATING; HIGH-FREQUENCY HEATING; PHOTOTUBES; PLASMA HEATING; RADIATION TRANSPORT; SIMULATION; THERMONUCLEAR DEVICES
Optional Information
- Notes
- (c) 2006 American Institute of Physics