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Liu L, He XF, Yu DL, Shi ZB, Lu J, Xia F, Zheng DL, Zhang N, He XX, Wei YL, Zang LG, Yang ZC, Yan LW, Liu Y, Yang QW. Visible wide-angle view imaging system for the first plasma on the HL-2M tokamak. APPLIED OPTICS 2021; 60:3211-3216. [PMID: 33983221 DOI: 10.1364/ao.418903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
The wide-angle view imaging system, in terms of a tangential view diagnostic with field of view (FOV) of 56.8° and a downward-looking diagnostic from the top of the machine with FOV of 94.7°, has been newly constructed for the first plasma of the HL-2M tokamak achieved in December 2020. Its mission in this stage is to monitor the plasma evolution during its startup, sustainment, and disruption in the visible spectral range as well as the plasma-wall interaction. For the latter ultrawide view diagnostic, nearly three-quarters of the divertor region and half the area of the inner wall are in the view range. Both the diagnostics are characterized by a similar optical structure, i.e., the light emission from the plasma is collected by a front-end lens and transferred through an imaging fiber bundle to the camera. This optical structure is suitable for application in the complex tokamak environment mainly because the fiber bundle is flexible. Photos of glow discharges are acquired prior to the first plasma for testing the FOVs in the vacuum vessel. The spatial resolution is ∼4mm for the tangential view diagnostic and ∼10mm for the downward-looking diagnostic. The temporal resolutions, ranging from 90 to 360 Hz by changing the region of interest or binning acquisition mode of the color camera, are applied to record the plasma evolutions and/or dust creation events during the first plasma campaign.
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Losada U, Manzanares A, Balboa I, Silburn S, Karhunen J, Carvalho PJ, Huber A, Huber V, Solano ER, de la Cal E. Observations with fast visible cameras in high power Deuterium plasma experiments in the JET ITER-like wall tokamak. NUCLEAR MATERIALS AND ENERGY 2020. [DOI: 10.1016/j.nme.2020.100837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mertens P. The Core-Plasma CXRS Diagnostic for ITER: An Introduction to the Current Design. JOURNAL OF FUSION ENERGY 2018. [DOI: 10.1007/s10894-018-0202-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Figueiredo J, Murari A, Perez Von Thun C, Marocco D, Tardocchi M, Belli F, García Muñoz M, Silva A, Craciunescu T, Blanchard P, Balboa I, Hawkes N, Carvalho IS, Tal B, Bernardo J, Zychor I. JET diagnostic enhancements testing and commissioning in preparation for DT scientific campaigns. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:10K119. [PMID: 30399696 DOI: 10.1063/1.5038548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/29/2018] [Indexed: 06/08/2023]
Abstract
In order to optimize the scientific exploitation of JET (Joint European Torus) during the upcoming deuterium-tritium experiments, a set of diagnostic systems is being enhanced. These upgrades focus mainly on the experimental and operational conditions expected during tritium campaigns. It should be stressed that measurements relevant for burning plasmas are specifically targeted. Previously non-available capabilities, such as a current measurement system fully covering all poloidal field circuits, are described in detail. Instrument descriptions, performance prediction, testing, and initial commissioning results of these systems are presented.
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Affiliation(s)
- J Figueiredo
- EUROfusion Programme Management Unit, Culham Science Centre, Abingdon, United Kingdom
| | - A Murari
- EUROfusion Programme Management Unit, Culham Science Centre, Abingdon, United Kingdom
| | - C Perez Von Thun
- EUROfusion Programme Management Unit, Culham Science Centre, Abingdon, United Kingdom
| | - D Marocco
- Unità Tecnica Fusione, ENEA C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | - M Tardocchi
- IFP-CNR, Via R. Cozzi 53, 20125 Milano, Italy
| | - F Belli
- Unità Tecnica Fusione, ENEA C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | | | - A Silva
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - T Craciunescu
- The National Institute for Laser, Plasma and Radiation Physics, Magurele, Bucharest, Romania
| | - P Blanchard
- Ecole Polytechnique Fédérale de Lausanne (EPFL), CRPP, CH-1015 Lausanne, Switzerland
| | - I Balboa
- CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | - N Hawkes
- CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | - I S Carvalho
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - B Tal
- Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
| | - J Bernardo
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - I Zychor
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
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Uljanovs J, Groth M, Jaervinen A, Moulton D, Brix M, Corrigan G, Drewelow P, Guillemaut C, Harting D, Simpson J, Huber A, Jachmich S, Kruezi U, Lawson K, Meigs A, Sips A, Stamp M, Wiesen S. The isotope effect on divertor conditions and neutral pumping in horizontal divertor configurations in JET-ILW Ohmic plasmas. NUCLEAR MATERIALS AND ENERGY 2017. [DOI: 10.1016/j.nme.2017.03.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Figueiredo J, Murari A, Perez Von Thun C, Marocco D, Tardocchi M, Belli F, García Muñoz M, Silva A, Soare S, Craciunescu T, Santala M, Blanchard P, Balboa I, Hawkes N. JET diagnostic enhancements in preparation for DT operations. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:11D443. [PMID: 27910612 DOI: 10.1063/1.4962247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In order to complete the exploitation of the JET ITER-like Wall and to take full benefit from deuterium-tritium experiments on JET, a set of diagnostic system refurbishments or upgrades is in progress. These diagnostic enhancements focus mainly on neutron, gamma, fast ions, instabilities, and operations support. These efforts intend to provide better spatial, temporal, and energy resolution while increasing measurement coverage. Also previously non-existing capabilities, such as Doppler reflectometry is now available for scientific exploitation. Guaranteeing diagnostic reliability and consistency during the expected DT conditions is also a critical objective of the work and systems being implemented. An overview of status and scope of the ongoing projects is presented.
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Affiliation(s)
- J Figueiredo
- EUROfusion Programme Management Unit, Culham Science Centre, Abingdon, United Kingdom
| | - A Murari
- EUROfusion Programme Management Unit, Culham Science Centre, Abingdon, United Kingdom
| | - C Perez Von Thun
- EUROfusion Programme Management Unit, Culham Science Centre, Abingdon, United Kingdom
| | - D Marocco
- Unità Tecnica Fusione-ENEA C. R. Frascati, Via E. Fermi 45, Frascati, 00044 Roma, Italy
| | - M Tardocchi
- IFP-CNR, Via R. Cozzi 53, 20125 Milano, Italy
| | - F Belli
- Unità Tecnica Fusione-ENEA C. R. Frascati, Via E. Fermi 45, Frascati, 00044 Roma, Italy
| | | | - A Silva
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - S Soare
- The National Institute for Cryogenics and Isotopic Technology, Ramnicu Valcea, Romania
| | - T Craciunescu
- The National Institute for Laser, Plasma and Radiation Physics, Magurele, Bucharest, Romania
| | - M Santala
- Aalto University, P.O. Box 14100, FIN-00076 Aalto, Finland
| | - P Blanchard
- Ecole Polytechnique Fédérale de Lausanne (EPFL), CRPP, CH-1015 Lausanne, Switzerland
| | - I Balboa
- CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | - N Hawkes
- CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
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Chektybayev B, Shapovalov G, Kolodeshnikov A. Visible wide angle view imaging system of KTM tokamak based on multielement image fiber bundle. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:053505. [PMID: 26026523 DOI: 10.1063/1.4921475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In the paper, new visible wide angle view imaging system of KTM tokamak is described. The system has been designed to observe processes inside of plasma and the processes occurring due to plasma-wall interactions through the long equatorial port. Imaging system is designed based on special image fiber bundle and entrance wide angle lens, which provide image of large section of the vacuum chamber, both poloidal half-section and divertor through the sufficiently long equatorial port. The system also consists of two video cameras: slow and fast with image intensifier. Commercial equipment had been used in design of the system that allowed reducing the cost and time for research and development. The paper also discusses advantages and disadvantages of the system in comparison with conventional endoscopes based on a lens system and considers its promising utilization in future tokamaks and future steady state fusion reactors.
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Affiliation(s)
- B Chektybayev
- Institute of Atomic Energy Branch of National Nuclear Center, Kurchatov, Kazakhstan
| | - G Shapovalov
- Institute of Atomic Energy Branch of National Nuclear Center, Kurchatov, Kazakhstan
| | - A Kolodeshnikov
- Institute of Atomic Energy Branch of National Nuclear Center, Kurchatov, Kazakhstan
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Wang Q, Yang J, Hu L, Yang X, Han X. Applications of Visible Imaging Diagnostics on EAST Tokamak. JOURNAL OF FUSION ENERGY 2015. [DOI: 10.1007/s10894-015-9928-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Applying multi-physics requirements and loads in FEM analysis and testing—The JET KL11 endoscope design verification process. FUSION ENGINEERING AND DESIGN 2013. [DOI: 10.1016/j.fusengdes.2013.02.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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