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Title: TORBEAM 2.0, a paraxial beam tracing code for electron-cyclotron beams in fusion plasmas for extended physics applications

Journal Article · · Computer Physics Communications
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  1. Max Planck Inst. for Plasma Physics, Garching (Germany)
  2. Max Planck Inst. for Plasma Physics, Garching (Germany); Aalto Univ., Otaniemi (Finland). Dept. of Applied Physics
  3. Columbia Univ., New York, NY (United States)
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  5. Inst. of Plasma Physics (IFP), CNR, Milan (Italy)
  6. Federal Inst. of Technology, Lausanne (Switzerland). Swiss Plasma Center (SPC)
  7. National Central Univ., Taoyuan City (Taiwan). Dept. of Physics and Center for Mathematics and Theoretical Physics
  8. Max Planck Inst. for Plasma Physics, Greifswald (Germany)
  9. Dutch Inst. for Fundamental Energy Research (DIFFER), Nieuwegein (Netherlands)
  10. Univ. of Bayreuth (Germany). Dept. of Physics and Theoretical Physics

The paraxial WKB code TORBEAM (Poli, 2001) is widely used for the description of electron-cyclotron waves in fusion plasmas, retaining diffraction effects through the solution of a set of ordinary differential equations. With respect to its original form, the code has undergone significant transformations and extensions, in terms of both the physical model and the spectrum of applications. The code has been rewritten in Fortran 90 and transformed into a library, which can be called from within different (not necessarily Fortran-based) workflows. The models for both absorption and current drive have been extended, including e.g. fully-relativistic calculation of the absorption coefficient, momentum conservation in electron–electron collisions and the contribution of more than one harmonic to current drive. The code can be run also for reflectometry applications, with relativistic corrections for the electron mass. Formulas that provide the coupling between the reflected beam and the receiver have been developed. Accelerated versions of the code are available, with the reduced physics goal of inferring the location of maximum absorption (including or not the total driven current) for a given setting of the launcher mirrors. Optionally, plasma volumes within given flux surfaces and corresponding values of minimum and maximum magnetic field can be provided externally to speed up the calculation of full driven-current profiles. These can then be employed in real-time control algorithms or for fast data analysis.

Research Organization:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
Max Planck Computing and Data Facility (MPCDF), Garching (Germany)
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1465668
Alternate ID(s):
OSTI ID: 1548832
Journal Information:
Computer Physics Communications, Vol. 225, Issue C; ISSN 0010-4655
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

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Cited By (14)

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Exploring fusion-reactor physics with high-power electron cyclotron resonance heating on ASDEX Upgrade journal January 2020
Quasioptical modeling of wave beams with and without mode conversion. II. Numerical simulations of single-mode beams journal July 2019
Real-time plasma state monitoring and supervisory control on TCV journal January 2019
Physics research on the TCV tokamak facility: from conventional to alternative scenarios and beyond journal August 2019
Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory journal July 2019
From a reflectrometry code to a ‘standard’ EC code to investigate the impact of the edge density fluctuations on the EC waves propagation journal September 2019
Optimal MSE polarisation angle and q-profile estimation using Kalman filters and the plasma simulator RAPTOR journal February 2019
Experimental investigation of the tilt angle of turbulent structures in the core of fusion plasmas journal June 2019
Control of neoclassical tearing modes and integrated multi-actuator plasma control on TCV journal June 2019
Measurement of the tilt angle of turbulent structures in magnetically confined plasmas using Doppler reflectometry journal September 2019
Density control by pellets in plasmas with ELM mitigation by RMPs in the ASDEX Upgrade tokamak journal June 2018
Real-time plasma state monitoring and supervisory control on TCV text January 2019
Exploring fusion-reactor physics with high-power electron cyclotron resonance heating on ASDEX Upgrade text January 2020

Figures / Tables (9)