Published October 2010 | Version v1
Journal article Metadata-only

Observation of alpha particle loss from JET plasmas during ion cyclotron resonance frequency heating using a thin foil Faraday cup detector array

Creators

  • 1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  • 2. Physics Department, Colorado School of Mines, Golden, Colorado 80401 (United States)
  • 3. Culham Centre for Fusion Energy, Euratom/CCFE Fusion Assoc., Abingdon, Oxon OX14 3DB (United Kingdom)
  • 4. Consorzio RFX-Associazione EURATOM ENEA per la Fusione, I-35127 Padova (Italy)

Description

The loss of MeV alpha particles from JET plasmas has been measured with a set of thin foil Faraday cup detectors during third harmonic heating of helium neutral beam ions. Tail temperatures of ∼2 MeV have been observed, with radial scrape off lengths of a few centimeters. Operational experience from this system indicates that such detectors are potentially feasible for future large tokamaks, but careful attention to screening rf and MHD induced noise is essential.

Additional details

Identifiers

DOI
10.1063/1.3502325;

Publishing Information

Journal Title
Review of Scientific Instruments
Journal Volume
81
Journal Issue
10
Journal Page Range
p. 10D330-10D330.3
ISSN
0034-6748
CODEN
RSINAK

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44019136
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Descriptors DEI
ALPHA PARTICLES; ELECTRON TEMPERATURE; FARADAY CUPS; FOILS; HELIUM; ION BEAMS; ION CYCLOTRON-RESONANCE; ION TEMPERATURE; JET TOKAMAK; MAGNETOHYDRODYNAMICS; MEV RANGE; NOISE; PLASMA; PLASMA JETS; RF SYSTEMS; SCREENING
Descriptors DEC
BEAM MONITORS; BEAMS; CHARGED PARTICLES; CLOSED PLASMA DEVICES; CYCLOTRON RESONANCE; ELEMENTS; ENERGY RANGE; FLUID MECHANICS; FLUIDS; GASES; HYDRODYNAMICS; IONIZING RADIATIONS; MEASURING INSTRUMENTS; MECHANICS; MONITORS; NONMETALS; RADIATIONS; RARE GASES; RESONANCE; THERMONUCLEAR DEVICES; TOKAMAK DEVICES

Optional Information

Notes
(c) 2010 American Institute of Physics
Collaborations
JET EFDA Contributors