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Title: Fast ion generation in the cathode plasma jet of a multipicosecond laser-triggered vacuum discharge

Abstract

Ion generation in the cathode plasma jet of a moderate-current ({approx}2.3 kA), low-energy ({<=}20 J) vacuum spark discharge triggered by {approx}27 ps, 10 mJ laser pulses is studied using time of flight technique. Fastest ion velocity and velocity corresponding to the peak of the time of flight signals for Al cathode were measured to be {approx}5.25x10{sup 8} cm/s (energy of {approx}143 keV/u) and {approx}8.1x10{sup 7} cm/s (energy of {approx}3.4 keV/u), respectively. Corresponding velocities in the case of ions generated from laser-produced Al plasma (energy of {approx}550 mJ, intensity of {approx}10{sup 14} W/cm{sup 2}) were found to be much smaller, viz., {approx}1.05x10{sup 8} cm/s (energy of {approx}5.75 keV/u) and {approx}2.63x10{sup 7} cm/s (energy of {approx}0.36 keV/u), respectively. Study shows efficient acceleration of ions in a current-carrying cathode plasma jet of a small-energy multipicosecond laser-triggered spark discharge as compared with that in a high-energy multipicosecond laser-produced plasma plume.

Authors:
; ;  [1]
  1. Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)
Publication Date:
OSTI Identifier:
22053950
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CATHODES; ELECTRIC CURRENTS; ELECTRIC DISCHARGES; IONS; KEV RANGE; LASER-PRODUCED PLASMA; PLASMA JETS; PULSES; TIME-OF-FLIGHT METHOD

Citation Formats

Moorti, A, Naik, P A, and Gupta, P D. Fast ion generation in the cathode plasma jet of a multipicosecond laser-triggered vacuum discharge. United States: N. p., 2010. Web. doi:10.1063/1.3354983.
Moorti, A, Naik, P A, & Gupta, P D. Fast ion generation in the cathode plasma jet of a multipicosecond laser-triggered vacuum discharge. United States. https://doi.org/10.1063/1.3354983
Moorti, A, Naik, P A, and Gupta, P D. Mon . "Fast ion generation in the cathode plasma jet of a multipicosecond laser-triggered vacuum discharge". United States. https://doi.org/10.1063/1.3354983.
@article{osti_22053950,
title = {Fast ion generation in the cathode plasma jet of a multipicosecond laser-triggered vacuum discharge},
author = {Moorti, A and Naik, P A and Gupta, P D},
abstractNote = {Ion generation in the cathode plasma jet of a moderate-current ({approx}2.3 kA), low-energy ({<=}20 J) vacuum spark discharge triggered by {approx}27 ps, 10 mJ laser pulses is studied using time of flight technique. Fastest ion velocity and velocity corresponding to the peak of the time of flight signals for Al cathode were measured to be {approx}5.25x10{sup 8} cm/s (energy of {approx}143 keV/u) and {approx}8.1x10{sup 7} cm/s (energy of {approx}3.4 keV/u), respectively. Corresponding velocities in the case of ions generated from laser-produced Al plasma (energy of {approx}550 mJ, intensity of {approx}10{sup 14} W/cm{sup 2}) were found to be much smaller, viz., {approx}1.05x10{sup 8} cm/s (energy of {approx}5.75 keV/u) and {approx}2.63x10{sup 7} cm/s (energy of {approx}0.36 keV/u), respectively. Study shows efficient acceleration of ions in a current-carrying cathode plasma jet of a small-energy multipicosecond laser-triggered spark discharge as compared with that in a high-energy multipicosecond laser-produced plasma plume.},
doi = {10.1063/1.3354983},
url = {https://www.osti.gov/biblio/22053950}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 3,
volume = 81,
place = {United States},
year = {2010},
month = {3}
}