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Galdon-Quiroga J, Birkenmeier G, Oyola P, Lindl H, Rodriguez-Gonzalez A, Anda G, Garcia-Munoz M, Herrmann A, Kalis J, Kaunert K, Lunt T, Refy D, Rohde V, Rueda-Rueda J, Sochor M, Tal B, Teschke M, Videla M, Viezzer E, Zoletnik S. First measurements of an imaging heavy ion beam probe at the ASDEX Upgrade tokamak. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2024; 95:013504. [PMID: 38206100 DOI: 10.1063/5.0175720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
The imaging heavy ion beam probe (i-HIBP) diagnostic has been successfully commissioned at ASDEX Upgrade. The i-HIBP injects a primary neutral beam into the plasma, where it is ionized, leading to a fan of secondary (charged) beams. These are deflected by the magnetic field of the tokamak and collected by a scintillator detector, generating a strike-line light pattern that encodes information on the density, electrostatic potential, and magnetic field of the plasma edge. The first measurements have been made, demonstrating the proof-of-principle of this diagnostic technique. A primary beam of 85/87Rb has been used with energies ranging between 60 and 72 keV and extracted currents up to 1.5 mA. The first signals have been obtained in experiments covering a wide range of parameter spaces, with plasma currents (Ip) between 0.2 and 0.8 MA and on-axis toroidal magnetic field (Bt) between 1.9 and 2.7 T. Low densities appear to be critical for the performance of the diagnostic, as signals are typically observed only when the line integrated density is below 2.0-3.0 × 1019 m-2 in the central interferometer chord, depending on the plasma shape. The strike line moves as expected when Ip is ramped, indicating that current measurements are possible. Additionally, clear dynamics in the intensity of the strike line are often observed, which might be linked to changes in the edge profile structure. However, the signal-to-background ratio of the signals is hampered by stray light, and the image guide degradation is due to neutron irradiation. Finally, simulations have been carried out to investigate the sensitivity of the expected signals to plasma density and temperature. The results are in qualitative agreement with the experimental observations, suggesting that the diagnostic is almost insensitive to fluctuations in the temperature profile, while the signal level is highly determined by the density profile due to the beam attenuation.
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Affiliation(s)
- J Galdon-Quiroga
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - G Birkenmeier
- Max Planck Institute for Plasma Physics, Garching, Germany
- TUM School of Natural Sciences, Physics Department, Technical University of Munich, 85748 Garching, Germany
| | - P Oyola
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - H Lindl
- Max Planck Institute for Plasma Physics, Garching, Germany
- TUM School of Natural Sciences, Physics Department, Technical University of Munich, 85748 Garching, Germany
| | - A Rodriguez-Gonzalez
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - G Anda
- Centre for Energy Research, Budapest, Hungary
| | - M Garcia-Munoz
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - A Herrmann
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - J Kalis
- Max Planck Institute for Plasma Physics, Garching, Germany
- TUM School of Natural Sciences, Physics Department, Technical University of Munich, 85748 Garching, Germany
| | - K Kaunert
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - T Lunt
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - D Refy
- Centre for Energy Research, Budapest, Hungary
| | - V Rohde
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - J Rueda-Rueda
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - M Sochor
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - B Tal
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Teschke
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Videla
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - E Viezzer
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain
| | - S Zoletnik
- Centre for Energy Research, Budapest, Hungary
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Tanaka H, Sakamoto M, Furutachi K, Oki K, Mizuguchi M, Nagatsuka Y, Yoshikawa M, Nohara R, Yoshikawa M, Kohagura J, Ohno N, Tsuji Y. Correlation Analysis of 3–4 Kilohertz Core and Edge Density Fluctuations in the GAMMA 10 Tandem Mirror Device. FUSION SCIENCE AND TECHNOLOGY 2015. [DOI: 10.13182/fst14-874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Tanaka
- National Institute for Fusion Science, 322-6 Orochi-cho, Toki 509-5292, Japan
| | - M. Sakamoto
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - K. Furutachi
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - K. Oki
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - M. Mizuguchi
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - Y. Nagatsuka
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - R. Nohara
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - J. Kohagura
- University of Tsukuba, Plasma Research Center, Ibaraki 305-8577, Japan
| | - N. Ohno
- Nagoya University, Graduate School of Engineering, Furo-cho, Nagoya 464-8603, Japan
| | - Y. Tsuji
- Nagoya University, Graduate School of Engineering, Furo-cho, Nagoya 464-8603, Japan
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Nishino N, Kawano H, Higashizono Y, Yonenaga R, Kigura S, Nakashima Y, Hosoi K, Ichimura K, Takeda H, Ueda H, Takahashi S, Ookawa K, Yoshikawa M, Ikezoe R, Kohagura J, Kariya T, Katanuma I, Hirata M, Numakura T, Minami R, Ichimura M, Sakamoto M, Imai T. Edge Turbulence/Fluctuation Observation at “High Density Mode” in GAMMA 10 by Fast Camera. FUSION SCIENCE AND TECHNOLOGY 2013. [DOI: 10.13182/fst13-a16943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- N. Nishino
- Graduate school of Engineering, Hiroshima University
| | - H. Kawano
- Plasma Research Center, University of Tsukuba
| | | | - R. Yonenaga
- Plasma Research Center, University of Tsukuba
| | - S. Kigura
- Plasma Research Center, University of Tsukuba
| | | | - K. Hosoi
- Plasma Research Center, University of Tsukuba
| | - K. Ichimura
- Plasma Research Center, University of Tsukuba
| | - H. Takeda
- Plasma Research Center, University of Tsukuba
| | - H. Ueda
- Plasma Research Center, University of Tsukuba
| | | | - K. Ookawa
- Plasma Research Center, University of Tsukuba
| | | | - R. Ikezoe
- Plasma Research Center, University of Tsukuba
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba
| | - T. Kariya
- Plasma Research Center, University of Tsukuba
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba
| | - M. Hirata
- Plasma Research Center, University of Tsukuba
| | - T. Numakura
- Plasma Research Center, University of Tsukuba
| | - R. Minami
- Plasma Research Center, University of Tsukuba
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba
| | - M. Sakamoto
- Plasma Research Center, University of Tsukuba
| | - T. Imai
- Plasma Research Center, University of Tsukuba
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Nishino N, Nakashima Y, Takeda H, Yonenaga R, Hosoi K, Nakashima Y, Ozawa H, Ishii T, Ichimura M, Kariya T, Katanuma I, Minami R, Miyata Y, Yamaguchi Y, Yoshikawa M, Imai T. High-Speed Imaging of Edge Plasma in the GAMMA 10 Tandem Mirror. FUSION SCIENCE AND TECHNOLOGY 2011. [DOI: 10.13182/fst11-a11640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- N. Nishino
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Takeda
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - R. Yonenaga
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Hosoi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Ozawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Ishii
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Kariya
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - R. Minami
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Miyata
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Yamaguchi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Imai
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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