skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ion diode experiments on PBFA (Particle Beam Fusion Accelerator) II: Workshop on applications of high power switching

Abstract

Ion diode research on Sandia National Laboratories' Particle Beam Fusion Accelerator (PBFA) II has progressed significantly during the past two years as we have operated in the shot-a-day model with well-diagnosed proton and lithium ion diode loads. During this period, we have succeeded in demonstrating efficient proton beam generation and in focusing the beam to a full width at half maximum (FWHM) spot size of 5.2 mm. Power and energy densities equivalent to 5.4 (+0.9, /minus/0.8) TW/cm/sup 2/ and 73 kJ/cm/sup 2/, respectively, on a 6 mm diameter sphere from the full diode were obtained. Tests of ion diode operation with a simple Plasma Opening Switch (POS), opening at a current of 1-2 MA, indicate efficient energy coupling and a rapid turn on of iron when the POS opens. A model of diode operation has been developed which successfully describes the operating impedance of applied-B ion diodes on PBFA II, PBFA I, Proto II, and Proto I. In addition, we have developed the capability to perform particle simulations which have helped to determine optimized insulating magnetic field profiles and anode shapes for efficient ion beam generation and focusing. Lithium ion source experiments on PBFA II have succeeded in delivering 26more » kJ of lithium ions to the axis using a field-enhanced LiF ion source. Several active lithium ion sources, which should allow improved lithium began generation and focusing, are now being prepared for testing on PBFA II. 11 refs., 10 figs., 2 tabs.« less

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
6140754
Report Number(s):
SAND-89-1522C; CONF-890796-1
ON: TI89014177
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: International workshop on high power opening switches, Novosibirsk, USSR, 1 Jul 1989; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 43 PARTICLE ACCELERATORS; THERMIONIC DIODES; TESTING; BEAM TRANSPORT; FOCUSING; ION SOURCES; LITHIUM IONS; PARTICLE BEAM FUSION ACCELERATOR; PERFORMANCE; PLASMA SWITCHES; PROTON BEAMS; ACCELERATORS; BEAMS; CHARGED PARTICLES; DIODE TUBES; ELECTRICAL EQUIPMENT; ELECTRON TUBES; EQUIPMENT; IONS; NUCLEON BEAMS; PARTICLE BEAMS; SWITCHES; THERMIONIC TUBES; 700208* - Fusion Power Plant Technology- Inertial Confinement Technology; 430301 - Particle Accelerators- Ion Sources

Citation Formats

Stinnett, R W, Lockner, T R, Johnson, D J, Coats, R S, Mehlhorn, T A, Desjarlais, M P, Bieg, K W, Pregenzer, A L, Woodworth, J R, and Leeper, R J. Ion diode experiments on PBFA (Particle Beam Fusion Accelerator) II: Workshop on applications of high power switching. United States: N. p., 1989. Web.
Stinnett, R W, Lockner, T R, Johnson, D J, Coats, R S, Mehlhorn, T A, Desjarlais, M P, Bieg, K W, Pregenzer, A L, Woodworth, J R, & Leeper, R J. Ion diode experiments on PBFA (Particle Beam Fusion Accelerator) II: Workshop on applications of high power switching. United States.
Stinnett, R W, Lockner, T R, Johnson, D J, Coats, R S, Mehlhorn, T A, Desjarlais, M P, Bieg, K W, Pregenzer, A L, Woodworth, J R, and Leeper, R J. 1989. "Ion diode experiments on PBFA (Particle Beam Fusion Accelerator) II: Workshop on applications of high power switching". United States.
@article{osti_6140754,
title = {Ion diode experiments on PBFA (Particle Beam Fusion Accelerator) II: Workshop on applications of high power switching},
author = {Stinnett, R W and Lockner, T R and Johnson, D J and Coats, R S and Mehlhorn, T A and Desjarlais, M P and Bieg, K W and Pregenzer, A L and Woodworth, J R and Leeper, R J},
abstractNote = {Ion diode research on Sandia National Laboratories' Particle Beam Fusion Accelerator (PBFA) II has progressed significantly during the past two years as we have operated in the shot-a-day model with well-diagnosed proton and lithium ion diode loads. During this period, we have succeeded in demonstrating efficient proton beam generation and in focusing the beam to a full width at half maximum (FWHM) spot size of 5.2 mm. Power and energy densities equivalent to 5.4 (+0.9, /minus/0.8) TW/cm/sup 2/ and 73 kJ/cm/sup 2/, respectively, on a 6 mm diameter sphere from the full diode were obtained. Tests of ion diode operation with a simple Plasma Opening Switch (POS), opening at a current of 1-2 MA, indicate efficient energy coupling and a rapid turn on of iron when the POS opens. A model of diode operation has been developed which successfully describes the operating impedance of applied-B ion diodes on PBFA II, PBFA I, Proto II, and Proto I. In addition, we have developed the capability to perform particle simulations which have helped to determine optimized insulating magnetic field profiles and anode shapes for efficient ion beam generation and focusing. Lithium ion source experiments on PBFA II have succeeded in delivering 26 kJ of lithium ions to the axis using a field-enhanced LiF ion source. Several active lithium ion sources, which should allow improved lithium began generation and focusing, are now being prepared for testing on PBFA II. 11 refs., 10 figs., 2 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6140754}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: