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Title: K-shell emission trends from 60 to 130 cm/μs stainless steel implosions

Recent experiments at the 20 MA Z Accelerator have demonstrated, for the first time, implosion velocities up to 110–130 cm/μs in imploding stainless steel wire arrays. These velocities, the largest inferred in a magnetically driven implosion, lead to ion densities of 2 × 10{sup 20} cm{sup −3} with electron temperatures of ∼5 keV. These plasma conditions have resulted in significant increases in the K-shell radiated output of 5–10 keV photons, radiating powers of >30 TW and yields >80 kJ, making it the brightest laboratory x-ray source in this spectral region. These values represent a doubling of the peak power and a 30% increase in the yield relative to previous studies. The experiments also included wire arrays with slower implosions, which were observed to have lower temperatures and reduced K-shell output. These colder pinches, however, radiated 260 TW in the soft x-ray region, making them one of the brightest soft x-ray sources available.
Authors:
; ; ; ; ; ; ; ; ; ;  [1] ; ; ;  [2] ;  [3]
  1. Sandia National Laboratories, Albuquerque, New Mexico 87106 (United States)
  2. Naval Research Laboratory, Washington, DC 20375 (United States)
  3. Weizmann Institute of Science, Rehovot 76100 (Israel)
Publication Date:
OSTI Identifier:
22218561
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 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; ELECTRON TEMPERATURE; EXPLODING WIRES; IMPLOSIONS; ION TEMPERATURE; K SHELL; KEV RANGE; PHOTONS; PINCH EFFECT; PLASMA DENSITY; SOFT X RADIATION; STAINLESS STEELS; X-RAY SOURCES