Pellet charge exchange helium measurement using neutral particle analyzer in large helical device
Abstract
It is very important to investigate the confinement of {alpha} particles, which will be produced by nuclear reactions in ITER and fusion reactors. The pellet charge exchange (PCX) measurement is one of the most powerful methods because it can directly provide the profile of the {alpha} particle energy spectra in a plasma. In the large helical device, PCX using tracer encapsulated solid pellet (TESPEL) has been tried in many hydrogen and helium plasmas, including helium accelerated by using the cyclotron resonance heating. In the PCX, we use the compact neutral particle analyzer without simultaneous mass separation ability. The helium particle measurement can be achieved by the application of voltage in the condenser plate. The scattering of hydrogen particle is carefully considered during the estimation of the helium amount. The radial helium profiles can also be obtained by comparing four TESPEL injection shots with/without higher harmonic fast wave heating and at applied plate voltages for He or H, respectively.
- Authors:
-
- High Energy Particle Group, Wave Heating Group and LHD Experimental Group, National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
- Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561 (Japan)
- Publication Date:
- OSTI Identifier:
- 21266507
- Resource Type:
- Journal Article
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 79; Journal Issue: 10; Other Information: DOI: 10.1063/1.2978191; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALPHA PARTICLES; CHARGE EXCHANGE; CYCLOTRON RESONANCE; ELECTRIC POTENTIAL; ENERGY SPECTRA; HELIUM; HYDROGEN; ITER TOKAMAK; LHD DEVICE; NEUTRAL PARTICLE ANALYZERS; PELLETS; PLASMA; PLASMA CONFINEMENT; STELLARATORS
Citation Formats
Ozaki, T, Goncharov, P, Veshchev, E, Tamura, N, Sudo, S, Seki, T, Kasahara, H, Takase, Y, and Ohsako, T. Pellet charge exchange helium measurement using neutral particle analyzer in large helical device. United States: N. p., 2008.
Web. doi:10.1063/1.2978191.
Ozaki, T, Goncharov, P, Veshchev, E, Tamura, N, Sudo, S, Seki, T, Kasahara, H, Takase, Y, & Ohsako, T. Pellet charge exchange helium measurement using neutral particle analyzer in large helical device. United States. https://doi.org/10.1063/1.2978191
Ozaki, T, Goncharov, P, Veshchev, E, Tamura, N, Sudo, S, Seki, T, Kasahara, H, Takase, Y, and Ohsako, T. 2008.
"Pellet charge exchange helium measurement using neutral particle analyzer in large helical device". United States. https://doi.org/10.1063/1.2978191.
@article{osti_21266507,
title = {Pellet charge exchange helium measurement using neutral particle analyzer in large helical device},
author = {Ozaki, T and Goncharov, P and Veshchev, E and Tamura, N and Sudo, S and Seki, T and Kasahara, H and Takase, Y and Ohsako, T},
abstractNote = {It is very important to investigate the confinement of {alpha} particles, which will be produced by nuclear reactions in ITER and fusion reactors. The pellet charge exchange (PCX) measurement is one of the most powerful methods because it can directly provide the profile of the {alpha} particle energy spectra in a plasma. In the large helical device, PCX using tracer encapsulated solid pellet (TESPEL) has been tried in many hydrogen and helium plasmas, including helium accelerated by using the cyclotron resonance heating. In the PCX, we use the compact neutral particle analyzer without simultaneous mass separation ability. The helium particle measurement can be achieved by the application of voltage in the condenser plate. The scattering of hydrogen particle is carefully considered during the estimation of the helium amount. The radial helium profiles can also be obtained by comparing four TESPEL injection shots with/without higher harmonic fast wave heating and at applied plate voltages for He or H, respectively.},
doi = {10.1063/1.2978191},
url = {https://www.osti.gov/biblio/21266507},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 79,
place = {United States},
year = {Wed Oct 15 00:00:00 EDT 2008},
month = {Wed Oct 15 00:00:00 EDT 2008}
}