Terawatt fiber pinch experiments

Pinch formation in fiber pinch experiments has been investigated in the lower terawatt regime. The main results are: (1) there are upper limits of breakdown voltage (∼700 kV) and current rise rate (∼20 kA/ns) beyond which leak discharges develop within the vacuum feed of the pulseline KALIF; (2) the...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 1991-12, Vol.70 (12), p.7261-7272
Main Authors: KIES, W, DECKER, G, RATAJCZAK, W, STOLTZ, O, BAYLEY, J. M, MÄLZIG, M, VAN CALKER, C, WESTHEIDE, J, ZIETHEN, G, BACHMANN, H, BAUMUNG, K, BLUHM, H, RUSCH, D
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700310 - Plasma Confinement- (1992-)
ABLATION
Applied sciences
Circuit properties
DEUTERIUM
Electric, optical and optoelectronic circuits
Electronics
EMISSION
Exact sciences and technology
EXPANSION
FIBERS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LIMITING VALUES
NEUTRON EMISSION
NUCLEI
ODD-ODD NUCLEI
PINCH EFFECT
PLASMA EXPANSION
POWER RANGE
STABLE ISOTOPES
TERAWATT POWER RANGE
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pinch formation in fiber pinch experiments has been investigated in the lower terawatt regime. The main results are: (1) there are upper limits of breakdown voltage (∼700 kV) and current rise rate (∼20 kA/ns) beyond which leak discharges develop within the vacuum feed of the pulseline KALIF; (2) there is a lower limit of fiber radius (∼10 μm) below which pinch disruptions take place at a pinch current of ≳300 kA; (3) the hot (Te≤1 keV) inhomogeneous pinch plasma develops typically 10 ns after local collapses (micropinches) at a pinch current ≳400 kA and lives for more than 50 ns; (4) neutron emission (yield of CD2 fibers ∼1010) appears mostly isotropic; (5) all fiber pinches show global expansion with velocities reaching from typically 10 μm/ns (initial expansion) to ≳100 μm/ns; and (6) the power requirements for the fiber ablation process are contradictory to those for the final pinch phase.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.349773