Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Scenario development for the observation of alpha-driven instabilities in JET DT plasmas

Journal Article · · Nuclear Fusion
 [1];  [2];  [3];  [4];  [2];  [5];  [6];  [7];  [8];  [9];  [10];  [2];  [1];  [11];  [2];  [2];  [2];  [1];  [12];  [2] more »;  [2];  [2];  [13];  [14];  [15];  [10];  [2];  [2];  [2];  [10];  [11];  [2];  [16];  [16];  [2];  [2];  [17];  [18];  [12];  [16] « less
  1. Alternative Energies and Atomic Energy Commission (CEA), St. Paul Lez Durance (France)
  2. Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Consorzio RFX (Italy)
  5. Queens University, Belfast (United Kingdom)
  6. Institute of Plasma Physics and Laser Microfusion, Warsaw (Poland)
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Uppsala Univ. (Sweden)
  9. Ecole Polytechnique Federale Lausanne (Switzerland). Swiss Plasma Center
  10. Universidade de Lisboa (Portugal)
  11. Università degli Studi di Milano-Bicocca, Milano (Italy)
  12. KTH Royal Inst. of Technology, Stockholm (Sweden)
  13. Aalto Univ., Otaniemi (Finland)
  14. The Laboratory for Plasma Physics of the Ecole Royale Militaire / Koninklijke Militaire School (LPP-ERM/KMS) (Belgium)
  15. Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA); Barcelona Supercomputing Center (Spain)
  16. Ecole Polytechnique Federale Lausanne (Switzerland)
  17. Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)
  18. Dutch Institute for Fundamental Energy Research (DIFFER) (The Netherlands); ITER Organization, St. Paul Lez Durance (France)
+ Show Author Affiliations
In DT plasmas, toroidal Alfvén eigenmodes (TAEs) can be made unstable by the alpha particles resulting from fusion reactions, and may induce a significant redistribution of fast ions. Recent experiments have been conducted in JET deuterium plasmas in order to prepare scenarios aimed at observing alpha-driven TAEs in a future JET DT campaign. Discharges at low density, large core temperatures associated with the presence of internal transport barriers and characterised by good energetic ion confinement have been performed. ICRH has been used in the hydrogen minority heating regime to probe the TAE stability. The consequent presence of MeV ions has resulted in the observation of TAEs in many instances. The impact of several key parameters on TAE stability could therefore be studied experimentally. Modeling taking into account NBI and ICRH fast ions shows good agreement with the measured neutron rates, and has allowed predictions for DT plasmas to be performed.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
JET Collaboration
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1811411
Alternate ID(s):
OSTI ID: 22929445
Journal Information:
Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 8 Vol. 58; ISSN 0029-5515
Publisher:
IOP ScienceCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

Equilibrium analysis of iron core tokamaks using a full domain method journal August 1992
Nonlinear Energetic Particle Transport in the Presence of Multiple Alfvenic Waves in ITER text January 2015
New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks journal September 1981
Alfvén wave cascades in a tokamak journal May 2002
The TOFOR neutron spectrometer and its first use at JET journal October 2006
Energetic ions in ITER plasmas journal February 2015
Excitation of the toroidicity‐induced shear Alfvén eigenmode by fusion alpha particles in an ignited tokamak journal October 1989
Alpha particle destabilization of the toroidicity‐induced Alfvén eigenmodes journal September 1991
Low-n shear Alfvén spectra in axisymmetric toroidal plasmas journal January 1986
A 2-D Fokker-Planck treatment of the ICRF enhancement of beam-driven currents journal April 1984
Non-inductively driven currents in JET journal April 1989
Simulations of deuterium-tritium experiments in TFTR journal March 1992
Equilibrium analysis of iron core tokamaks using a full domain method journal August 1992
Neutron emission from TFTR supershots journal July 1993
Strategies for modifying alpha driven TAE thresholds through q profile and ion temperature control journal December 1995
Stability of alpha particle driven Alfvén eigenmodes in high performance JET DT plasmas journal March 1999
Stability of alpha particle driven Alfvén eigenmodes in high performance JET DT plasmas journal May 1999
Alpha particle physics experiments in the Tokamak Fusion Test Reactor journal January 2000
Energetic particle physics in JET journal July 2000
The influence of finite drift orbit width on ICRF heating in toroidal plasmas journal May 2002
Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks journal September 2003
Impurity transport in internal transport barrier discharges on JET journal January 2004
Heating and current drive by ion cyclotron waves in the activated phase of ITER journal December 2012
Overview of the JET results with the ITER-like wall journal September 2013
First scenario development with the JET new ITER-like wall journal December 2013
Energetic particle physics in fusion research in preparation for burning plasma experiments journal November 2014
Dual sightline measurements of MeV range deuterons with neutron and gamma-ray spectroscopy at JET journal November 2015
Predictive nonlinear studies of TAE-induced alpha-particle transport in the Q   =  10 ITER baseline scenario journal July 2016
The upgraded JET toroidal Alfvén eigenmode diagnostic system journal August 2016
Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments journal August 2016
Energetic particle drive for toroidicity-induced Alfven eigenmodes and kinetic toroidicity-induced Alfven eigenmodes in a low-shear tokamak journal October 1995
A review of Alfvén eigenmode observations in toroidal plasmas journal January 1999
Effect of q -profile modification by LHCD on internal transport barriers in JET * journal May 2001
Modelling of D majority ICRH at JET: impact of absorption at the Doppler-shifted resonance journal March 2009
Ion cyclotron resonance heating with consistent finite orbit widths and anisotropic equilibria journal April 2011
Nonlinear energetic particle transport in the presence of multiple Alfvénic waves in ITER journal November 2015
Overview of the JET results in support to ITER journal June 2017
Alpha-Particle-Driven Toroidal Alfvén Eigenmodes in the Tokamak Fusion Test Reactor journal April 1997
Isoparametric Bicubic Hermite Elements for Solution of the Grad-Shafranov Equation journal March 1991
Chapter 4: Advanced Tokamak Scenario Development at JET journal May 2008
Chapter 5: Burning Plasma Studies at JET journal May 2008

Cited By (6)

Generation and observation of fast deuterium ions and fusion-born alpha particles in JET $\mathrm{D-^3He}$ plasmas with the 3-ion radio-frequency heating scenario journal October 2020
TAE stability calculations compared to TAE antenna results in JET journal June 2018
Core plasma ion cyclotron emission driven by fusion-born ions journal November 2018
Scenario development for D–T operation at JET journal June 2019
Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall journal August 2019
Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall text January 2019

Similar Records

Impact of suprathermal ions on neutron yield in the pre-DT phase of ITER operation
Journal Article · Wed Jun 02 20:00:00 EDT 2021 · Nuclear Fusion · OSTI ID:1815383
Fast Particle-Wave Interactions and Alfvén Eigenmodes in JET Tokamak Plasmas
Technical Report · Tue Mar 01 23:00:00 EST 2022 · OSTI ID:1844482
Isotope effects and Alfvén eigenmode stability in JET H, D, T, DT, and He plasmas
Journal Article · Wed Jul 17 20:00:00 EDT 2024 · Nuclear Fusion · OSTI ID:2404448

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY