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Title: Comparison and analysis of 2-D simulation results with two implosion radiation experiments on the Los Alamos Pegasus I and Pegasus II capacitor banks

Abstract

Two experiments, PegI-41, conducted on the Los Alamos Pegasus I capacitor bank, and PegII-25, on the Pegasus II bank, consisted of the implosions of 13 mg (nominal), 5 cm radius, 2 cm high thin cylindrical aluminum foils resulting in soft x-ray radiation pulses from the plasma thermalization on axis. The implosions were conducted in direct-drive (no intermediate switching) mode with peak currents of about 4 MA and 5 MA respectively, and implosion times of about 2.5 {micro}s and 2.0 {micro}s. A radiation yield of about 250 kJ was measured for PegII-25. The purpose of these experiments was to examine the physics of the implosion and relate this physics to the production of the radiation pulse and to provide detailed experimental data which could be compared with 2-D radiation-magnetohydrodynamic (RMHD) simulations. Included in the experimental diagnostic suites were faraday rotation and dB/dt current measurements, a visible framing camera, an x-ray stripline camera, time-dependent spectroscopy, bolometers and XRD`S. A comparison of the results from these experiments shows agreement with 2-D simulation results in the instability development, current, and radiation pulse data, including the pulsewidth, shape, peak power and total radiation yield as measured by bolometry. Instabilities dominate the behavior of the implosionmore » and largely determine the properties of the resulting radiation pulse. The 2-D simulations can be seen to be an important tool in understanding the implosion physics.« less

Authors:
; ; ; ; ; ; ;  [1];  [2]
  1. Los Alamos National Lab., NM (United States)
  2. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemical and Nuclear Engineering
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
102223
Report Number(s):
LA-UR-95-2436; CONF-950750-10
ON: DE95016886; TRN: 95:020451
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Conference: 10. Institute of Electrical and Electronics Engineers (IEEE) pulsed power conference, Albuquerque, NM (United States), 10-13 Jul 1995; Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; X-RAY SOURCES; DESIGN; FOILS; IMPLOSIONS; ALUMINIUM; TEST FACILITIES; SOFT X RADIATION; COMPUTERIZED SIMULATION; TWO-DIMENSIONAL CALCULATIONS; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA

Citation Formats

Peterson, D.L., Bowers, R.L., Lebeda, C.F., Matuska, W., Benage, J., Idzorek, G., Oona, H., Stokes, J., and Roderick, N.F. Comparison and analysis of 2-D simulation results with two implosion radiation experiments on the Los Alamos Pegasus I and Pegasus II capacitor banks. United States: N. p., 1995. Web. doi:10.2172/102223.
Peterson, D.L., Bowers, R.L., Lebeda, C.F., Matuska, W., Benage, J., Idzorek, G., Oona, H., Stokes, J., & Roderick, N.F. Comparison and analysis of 2-D simulation results with two implosion radiation experiments on the Los Alamos Pegasus I and Pegasus II capacitor banks. United States. doi:10.2172/102223.
Peterson, D.L., Bowers, R.L., Lebeda, C.F., Matuska, W., Benage, J., Idzorek, G., Oona, H., Stokes, J., and Roderick, N.F. Fri . "Comparison and analysis of 2-D simulation results with two implosion radiation experiments on the Los Alamos Pegasus I and Pegasus II capacitor banks". United States. doi:10.2172/102223. https://www.osti.gov/servlets/purl/102223.
@article{osti_102223,
title = {Comparison and analysis of 2-D simulation results with two implosion radiation experiments on the Los Alamos Pegasus I and Pegasus II capacitor banks},
author = {Peterson, D.L. and Bowers, R.L. and Lebeda, C.F. and Matuska, W. and Benage, J. and Idzorek, G. and Oona, H. and Stokes, J. and Roderick, N.F.},
abstractNote = {Two experiments, PegI-41, conducted on the Los Alamos Pegasus I capacitor bank, and PegII-25, on the Pegasus II bank, consisted of the implosions of 13 mg (nominal), 5 cm radius, 2 cm high thin cylindrical aluminum foils resulting in soft x-ray radiation pulses from the plasma thermalization on axis. The implosions were conducted in direct-drive (no intermediate switching) mode with peak currents of about 4 MA and 5 MA respectively, and implosion times of about 2.5 {micro}s and 2.0 {micro}s. A radiation yield of about 250 kJ was measured for PegII-25. The purpose of these experiments was to examine the physics of the implosion and relate this physics to the production of the radiation pulse and to provide detailed experimental data which could be compared with 2-D radiation-magnetohydrodynamic (RMHD) simulations. Included in the experimental diagnostic suites were faraday rotation and dB/dt current measurements, a visible framing camera, an x-ray stripline camera, time-dependent spectroscopy, bolometers and XRD`S. A comparison of the results from these experiments shows agreement with 2-D simulation results in the instability development, current, and radiation pulse data, including the pulsewidth, shape, peak power and total radiation yield as measured by bolometry. Instabilities dominate the behavior of the implosion and largely determine the properties of the resulting radiation pulse. The 2-D simulations can be seen to be an important tool in understanding the implosion physics.},
doi = {10.2172/102223},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 1995},
month = {Fri Sep 01 00:00:00 EDT 1995}
}

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