Solutions to mitigate heat loads due to electrons on sensitive components of ITER HNB beamlines
| Autor: | Gianluigi Serianni, Mauro Dalla Palma, Emanuele Sartori, R. S. Hemsworth, Pierluigi Veltri, Piero Agostinetti, M. J. Singh |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Neutral Beam
Materials science Nuclear engineering Cryogenics Electron Beam Source Optic Simulation 01 natural sciences Cryopump Electron trajectory Heating and current drive ITER Neutral beam Civil and Structural Engineering Materials Science (all) Nuclear Energy and Engineering Mechanical Engineering 010305 fluids & plasmas MITICA 0103 physical sciences NBTF General Materials Science 010306 general physics cryopump Plasma Charged particle Heating and Current Drive Beamline Heat flux Neutral Beam Test Facility Physics::Accelerator Physics electron trajectory Atomic physics ITER HNB Beam (structure) |
| Zdroj: | ISFNT-12 International Symposium on Fusion Nuclear Technology, Jeju Island, Korea, September 14-18, 2015 info:cnr-pdr/source/autori:Sartori Emanuele; Veltri Pierluigi; Dalla Palma Mauro; Agostinetti Piero; Serianni Gianluigi; Hemsworth Ronald; Singh Mahendrajit/congresso_nome:ISFNT-12 International Symposium on Fusion Nuclear Technology/congresso_luogo:Jeju Island, Korea/congresso_data:September 14-18, 2015/anno:2015/pagina_da:/pagina_a:/intervallo_pagine Fusion engineering and design 109 (2016): 377–382. doi:10.1016/j.fusengdes.2016.02.095 info:cnr-pdr/source/autori:Sartori, Emanuele; Veltri, Pierluigi; Dalla Palma, Mauro; Agostinetti, Piero; Hemsworth, Ronald; Singh, Mahendrajit; Serianni, Gianluigi/titolo:Solutions to mitigate heat loads due to electrons on sensitive components of ITER HNB beamlines/doi:10.1016%2Fj.fusengdes.2016.02.095/rivista:Fusion engineering and design/anno:2016/pagina_da:377/pagina_a:382/intervallo_pagine:377–382/volume:109 RFX Ref.: RFX-MITICA-TN-328, 2015 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2016.02.095 |
| Popis: | The operation of neutral beam injectors for plasma heating and current drive in a fusion device provides challenges in the thermal management of beamline components. Sensitive components such as the cryogenic pumps at beamline periphery shall be protected from the heat flux due to stray electrons. These are emitted by the negative ion accelerator or generated along the beamline by interaction of fast electrons, ions or atoms with background gas and surfaces. In this article the case of the ITER Heating Neutral Beam (HNB) and its test facility MITICA is discussed, for which the beam parameters and the required pulse length of one hour is a major leap forward with respect to the present experience with neutral beam systems. The engineering solutions adopted for effective cryopump protection against the heat load from electrons are described. The use of three-dimensional numerical simulations of particle trajectories in the complex geometry of the beamline was needed for the quantitative estimations of the heat loads. The presented solutions were optimized to minimize the impact on gas pumping and on the functionality of other components. (C) 2016 Consorzio RFX. |
| Databáze: | OpenAIRE |
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