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Collisionless losse...
Collisionless losses of fast ions in the divertor tokamak test due to toroidal field ripple
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- Spizzo, G. (författare)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.;CNR, ISTP, Corso Stati Uniti 4, I-35127 Padua, Italy.
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- Gobbin, M. (författare)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.;CNR, ISTP, Corso Stati Uniti 4, I-35127 Padua, Italy.
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- Agostinetti, P. (författare)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.;CNR, ISTP, Corso Stati Uniti 4, I-35127 Padua, Italy.
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- Albanese, R. (författare)
- Univ Napoli Federico II, DIETI, Via Claudio 21, I-80125 Naples, Italy.;Consorzio CREATE, Via Claudio 21, I-80125 Naples, Italy.;DTT SC Arl, Frascati, Italy.
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- Ambrosino, R. (författare)
- Univ Napoli Federico II, DIETI, Via Claudio 21, I-80125 Naples, Italy.;Consorzio CREATE, Via Claudio 21, I-80125 Naples, Italy.;DTT SC Arl, Frascati, Italy.
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- Casiraghi, I. (författare)
- CNR, ISTP, Via Roberto Cozzi 53, I-20125 Milan, Italy.;Univ Milano Bicocca, Dipartimento Fis G Occhialini, Piazza Sci 3, I-20126 Milan, Italy.
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- Cecconello, Marco (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Falessi, M. V. (författare)
- Consorzio CREATE, Via Claudio 21, I-80125 Naples, Italy.;CR ENEA Frascati, CP 65, I-00044 Frascati, Italy.
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- Granucci, G. (författare)
- CNR, ISTP, Via Roberto Cozzi 53, I-20125 Milan, Italy.
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- Mantica, P. (författare)
- CNR, ISTP, Via Roberto Cozzi 53, I-20125 Milan, Italy.
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- Martin, P. (författare)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, Padua, Italy.
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- Vallar, M. (författare)
- Ecole Polytech Fed Lausanne EPFL, Swiss Plasma Ctr SPC, CH-1015 Lausanne, Switzerland.
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- Vincenzi, P. (författare)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.
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- Vlad, G. (författare)
- CR ENEA Frascati, CP 65, I-00044 Frascati, Italy.
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- White, R. B. (författare)
- Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
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- Zonca, F. (författare)
- DTT SC Arl, Frascati, Italy.;CR ENEA Frascati, CP 65, I-00044 Frascati, Italy.
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Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy;CNR, ISTP, Corso Stati Uniti 4, I-35127 Padua, Italy. Univ Napoli Federico II, DIETI, Via Claudio 21, I-80125 Naples, Italy.;Consorzio CREATE, Via Claudio 21, I-80125 Naples, Italy.;DTT SC Arl, Frascati, Italy. (creator_code:org_t)
- 2021-09-27
- 2021
- Engelska.
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Ingår i: Nuclear Fusion. - : Institute of Physics Publishing (IOPP). - 0029-5515 .- 1741-4326. ; 61:11
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this paper we analyze fast ion motion in the divertor tokamak test (DTT) device (Albanese et al 2017 Nucl. Fusion 57 016010). It is planned that DTT will be heated through a mix of 45 MW heating power, including 15 MW negative-ion-based neutral beam heating (NNBI) which is currently being developed by Consorzio RFX in Padova, Italy (Agostinetti et al 2019 Fusion Eng. Design 146 441-446). An issue for DTT is that a toroidal field (TF) ripple with a maximum value of about similar to 0.42% (with respect to the on-axis magnetic field B (0)) is expected on the low-field side, and this ripple interacts with fast ions through the rather well-known phenomena of ripple-precession resonances, in addition to prompt losses of ions which do not complete a full orbit in the poloidal plane. We will show that, with the planned geometry of NNBI, prompt losses are negligible, and ripple-precession losses amount to a maximum of 0.15%. The calculations are performed with the guiding center code Orbit using two different equilibria, and a beam with an energy of 400 keV and the injection angle alpha (inj) = 40 degrees (measured w.r.t. the first wall), which corresponds to a pitch of injected particles lambda = v (parallel to)/v approximate to sin alpha (inj) = 0.65. The main resonances are of the form omega (b) - nN omega (d) = 0, omega (b) and omega (d) being the bounce and precession frequency, respectively, N = 18 the ripple periodicity and 3 <= n <= 6 are the toroidal wavenumbers of the resonances. Although collisionless interaction with the TF ripple does not pose a serious threat to the NNBI project, an open question remains as to whether the presence of these resonances will interact with fast particles accelerated by Alfven eigenmodes, and if stochastization of the resonances is possible in DTT, as was observed in the past in TORE SUPRA.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- tokamak
- energetic particles
- neutral beam injection
- Hamiltonian dynamics
- resonances
- toroidal field ripple
- wave-particle interaction
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Till lärosätets databas
- Av författaren/redakt...
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Spizzo, G.
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Gobbin, M.
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Agostinetti, P.
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Albanese, R.
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Ambrosino, R.
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Casiraghi, I.
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visa fler...
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Cecconello, Marc ...
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Falessi, M. V.
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Granucci, G.
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Mantica, P.
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Martin, P.
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Vallar, M.
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Vincenzi, P.
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Vlad, G.
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White, R. B.
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Zonca, F.
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Uppsala universitet