Library for RF Interactions in Orbit Following Codes

Journal Article · Fri Dec 23 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3664996· OSTI ID:21612505

Johnson, T; Hellsten, T; Hoeoek, L J ^[1]; Salmi, A ^[2]; Steinbrecher, G ^[3]; Eriksson, L -G ^[4]; Schneider, M ^[5]

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1. Association EURATOM-VR, rary for RF Interactions in Orbit Following CoKTH (Sweden)
2. Association Euratom - TEKES, Aalto University (Finland)
3. Association EURATOM-MEdC, Univ. of Craiova (Romania)
4. European Commission, Research Directorate General (Belgium)
5. CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France)

A new code-library has been developed to handle quasi-linear wave particle interactions in orbit following Monte Carlo codes, RFOF (RF interactions in Orbit Following codes). This library will enable a large number of orbit following codes to model fast ion acceleration during ICRF and Lower Hybrid heating. The RFOF consists of two main modules: one evaluates the resonance condition, the other the resulting RF acceleration. The resonance condition is tested at each step along the orbit and the location of the next upcoming resonance is predicted. When a particle reaches the resonance, a quasi-linear acceleration is calculated with a novel Monte Carlo technique that avoids the time-consuming evaluation of phase-space derivatives of the interaction strength. In RFOF the wave-particles interactions are assumed to be localized to a single point on the orbit. This is often valid for the ion cyclotron and lower hybrid frequency ranges, but prevents the treatment of bounce and precessional resonances. The RFOF has been developed within the European Task Force for Integrated Tokamak Modelling, enabling interaction between experts in different fields. As a result the code is designed with a simple and generic interface, with a minimum of assumptions on e.g. the geometry. Successful integration with the two orbit following codes, ASCOT and SPOT, has already been demonstrated.

• OSTI ID: 21612505
• Journal Information: AIP Conference Proceedings, Vol. 1406, Issue 1; Conference: 9. topical conference on radio frequency power in plasmas, Newport (United States), 1-3 Jun 2011; Other Information: DOI: 10.1063/1.3664996; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
A CODES
ACCELERATION
COMPUTERIZED SIMULATION
ICR HEATING
ION CYCLOTRON-RESONANCE
IONS
LOWER HYBRID CURRENT DRIVE
LOWER HYBRID HEATING
MONTE CARLO METHOD
PARTICLE INTERACTIONS
PHASE SPACE
PLASMA
PLASMA SIMULATION
S CODES
TOKAMAK DEVICES
CALCULATION METHODS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COMPUTER CODES
CYCLOTRON RESONANCE
HEATING
HIGH-FREQUENCY HEATING
INTERACTIONS
MATHEMATICAL SPACE
NON-INDUCTIVE CURRENT DRIVE
PLASMA HEATING
RESONANCE
SIMULATION
SPACE
THERMONUCLEAR DEVICES