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Title: Characterization of the axial plasma shock in a table top plasma focus after the pinch and its possible application to testing materials for fusion reactors

The characterization of plasma bursts produced after the pinch phase in a plasma focus of hundreds of joules, using pulsed optical refractive techniques, is presented. A pulsed Nd-YAG laser at 532 nm and 8 ns FWHM pulse duration was used to obtain Schlieren images at different times of the plasma dynamics. The energy, interaction time with a target, and power flux of the plasma burst were assessed, providing useful information for the application of plasma focus devices for studying the effects of fusion-relevant pulses on material targets. In particular, it was found that damage factors on targets of the order of 10{sup 4} (W/cm{sup 2})s{sup 1/2} can be obtained with a small plasma focus operating at hundred joules.
Authors:
; ;  [1] ;  [2] ;  [2] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;
  1. Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago (Chile)
  2. (Chile)
  3. Instituto de Física, Pontificia Universidad Católica de Chile, Santiago (Chile)
  4. Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago (Chile)
  5. Facultad de Ingeniería, Pontificia Universidad Católica de Chile, Santiago (Chile)
  6. CNEA-CONICET and Universidad Nacional del Centro, 7000 Tandil (Argentina)
  7. CONICET and Universidad de Mar del Plata, Mar del Plata (Argentina)
  8. Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos (Mexico)
Publication Date:
OSTI Identifier:
22403368
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; FORMATION DAMAGE; MATERIALS TESTING; NEODYMIUM LASERS; PLASMA FOCUS; PLASMA FOCUS DEVICES; PULSES; THERMONUCLEAR REACTORS