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 »
- 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}
}