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Title: Charge and mass resolved time of flight observations of 140 fs laser produced ions

Abstract

Ions from this plasma are self-extracting with energies of 0.1 to 100 keV, the extraction potential being one of the desired observables. The charge/mass ([ital z]/[mu], [mu] is mass in AMU) separation is provided by a static magnetic field ([ital B][center dot][ital L]=1280 G cm, FWHM=14 mm) located 5 cm from the linear (1[minus][ital d]) detector. Displacement along the detector axis is thus proportional to [ital z]/[mu](1/[ital v]). The detector is a gold cathode MCP with a fast (sub-ns) phosphor. The phosphor output is coupled into a streak camera (typical sweep 8.5 or 24 [mu]s total) through a coherent fiber bundle. Streak images are grabbed with a 14-bit CCD. The signature of any specific ion is a straight line of slope proportional to [ital z]/[mu]. Since there are usually more than one charge state of a given ion, integer multiple slopes appear. Thus [ital z] [ital and] [ital m] can be found. Absolute calibration is taken from the slope of the proton streak, which is always present with our plasmas. While providing the same information as a Thomson parabola, the straight line images are easier to extract information from and offer resolution with less energy dependence. By providing mass andmore » time of flight information, the product of [ital z][center dot][ital T][sub [ital e]] can be determined unambiguously during the hydrodynamic acceleration of the plasma.« less

Authors:
; ; ; ; ;  [1]
  1. Lawrence Livermore National Laboratory, P.O. 808, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
6711883
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments; (United States)
Additional Journal Information:
Journal Volume: 66:1; Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER-PRODUCED PLASMA; ELECTRON TEMPERATURE; PLASMA DIAGNOSTICS; CALIBRATION; ELECTRIC CHARGES; MASS; PERFORMANCE; TIME-OF-FLIGHT METHOD; PLASMA; 700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)

Citation Formats

Guethlein, G, Bonlie, J, Price, D, Shepherd, R, Young, B, and Stewart, R. Charge and mass resolved time of flight observations of 140 fs laser produced ions. United States: N. p., 1995. Web. doi:10.1063/1.1146404.
Guethlein, G, Bonlie, J, Price, D, Shepherd, R, Young, B, & Stewart, R. Charge and mass resolved time of flight observations of 140 fs laser produced ions. United States. https://doi.org/10.1063/1.1146404
Guethlein, G, Bonlie, J, Price, D, Shepherd, R, Young, B, and Stewart, R. 1995. "Charge and mass resolved time of flight observations of 140 fs laser produced ions". United States. https://doi.org/10.1063/1.1146404.
@article{osti_6711883,
title = {Charge and mass resolved time of flight observations of 140 fs laser produced ions},
author = {Guethlein, G and Bonlie, J and Price, D and Shepherd, R and Young, B and Stewart, R},
abstractNote = {Ions from this plasma are self-extracting with energies of 0.1 to 100 keV, the extraction potential being one of the desired observables. The charge/mass ([ital z]/[mu], [mu] is mass in AMU) separation is provided by a static magnetic field ([ital B][center dot][ital L]=1280 G cm, FWHM=14 mm) located 5 cm from the linear (1[minus][ital d]) detector. Displacement along the detector axis is thus proportional to [ital z]/[mu](1/[ital v]). The detector is a gold cathode MCP with a fast (sub-ns) phosphor. The phosphor output is coupled into a streak camera (typical sweep 8.5 or 24 [mu]s total) through a coherent fiber bundle. Streak images are grabbed with a 14-bit CCD. The signature of any specific ion is a straight line of slope proportional to [ital z]/[mu]. Since there are usually more than one charge state of a given ion, integer multiple slopes appear. Thus [ital z] [ital and] [ital m] can be found. Absolute calibration is taken from the slope of the proton streak, which is always present with our plasmas. While providing the same information as a Thomson parabola, the straight line images are easier to extract information from and offer resolution with less energy dependence. By providing mass and time of flight information, the product of [ital z][center dot][ital T][sub [ital e]] can be determined unambiguously during the hydrodynamic acceleration of the plasma.},
doi = {10.1063/1.1146404},
url = {https://www.osti.gov/biblio/6711883}, journal = {Review of Scientific Instruments; (United States)},
issn = {0034-6748},
number = ,
volume = 66:1,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1995},
month = {Sun Jan 01 00:00:00 EST 1995}
}