130. LASER CUT X-PINCHES

Department: Mechanical & Aerospace Engineering
Research Institute Affiliation: Center for Energy Research (CER)
Faculty Advisor(s): Farhat Beg

Primary Student
Name: Joohwan Kim
Email: jok034@ucsd.edu
Phone: 858-334-9720
Grad Year: 2014

Abstract
We present experimental data from laser cut X-pinches in an effort to develop a reliable and efficient X-ray backlighting source for the characterization of ICF capsules. The linear transformer driver GenASIS was used to deliver a maximum peak current of 250 kA with 150 ns rise-time. Laser interferometry and Schlieren imaging were used to understand laser cut x-pinch plasma dynamics, such as ablation flare structures, compression and gap formation near cross point. Temporal and spatial resolution of the pinch is resolved using wideband Si diodes and time integrated x-ray pinhole cameras respectively. A comparison is made between laser cut and traditionally arranged X- pinches in terms of X-ray emission intensity, point-source coherence, and reproducibility.

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