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Title: Ions lost on their first orbit can impact Alfvén eigenmode stability

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4928436· OSTI ID:1350089
 [1];  [2];  [3]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. General Atomics, San Diego, CA (United States)
+ Show Author Affiliations

Some neutral-beam ions are deflected onto loss orbits by Alfvén eigenmodes on their first bounce orbit. Here, the resonance condition for these ions differs from the usual resonance condition for a confined fast ion. Estimates indicate that particles on single-pass loss orbits transfer enough energy to the wave to alter mode stability.

Research Organization:
General Atomics, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
FC02-04ER54698; SC-G903402; AC02-09CH11466; AC0209CH11466.
OSTI ID:
1350089
Alternate ID(s):
OSTI ID: 1229612
Journal Information:
Physics of Plasmas, Vol. 22, Issue 8; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

References (14)

Basic physics of Alfvén instabilities driven by energetic particles in toroidally confined plasmas journal May 2008
High-n ideal and resistive shear Alfvén waves in tokamaks journal April 1985
Toroidal alfvén eigenmodes driven with ICRF accelerated protons in JT-60U negative shear discharges journal August 1998
MHD spectroscopy through detecting toroidal Alfvén eigenmodes and Alfvén wave cascades journal October 2001
Enhanced Localized Energetic-Ion Losses Resulting from Single-Pass Interactions with Alfvén Eigenmodes journal February 2013
Prompt non-resonant neutral beam-ion loss induced by Alfvén eigenmodes in the DIII-D tokamak journal November 2013
Using neutral beams as a light ion beam probe (invited) journal November 2014
Local wave particle resonant interaction causing energetic particle prompt loss in DIII-D plasmas journal October 2015
Modulation of prompt fast-ion loss by applied n = 2 fields in the DIII-D tokamak journal December 2013
Collisionless Damping of Nonlinear Plasma Oscillations journal January 1965
The tokamak Monte Carlo fast ion module NUBEAM in the National Transport Code Collaboration library journal June 2004
Alfvén eigenmode stability and fast ion loss in DIII-D and ITER reversed magnetic shear plasmas journal September 2012
Non-linear wave-particle interactions and fast ion loss induced by multiple Alfvén eigenmodes in the DIII-D tokamak journal May 2014
Fast excitation of EGAM by NBI journal March 2010

Cited By (1)

Diverse wave-particle interactions for energetic ions that traverse Alfvén eigenmodes on their first full orbit journal February 2016

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY