S. Theocharous
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View article: Peculiarities of planar shockwave interaction with air–water interface and solid target
Peculiarities of planar shockwave interaction with air–water interface and solid target Open
We present the results of the research on underwater electrical explosion of planar copper wire arrays, accompanied by the generation of a planar shock, using the synchrotron-based phase-contrast radiography imaging capabilities of the ID1…
View article: A portable X-pinch design for x-ray diagnostics of warm dense matter
A portable X-pinch design for x-ray diagnostics of warm dense matter Open
We describe the design and x-ray emission properties (temporal, spatial, and spectral) of Dry Pinch I, a portable X-pinch driver developed at Imperial College London. Dry Pinch I is a direct capacitor discharge device, 300 × 300 × 700 mm3 …
View article: Miniature solid-state switched spiral generator for the cost effective, programmable triggering of large scale pulsed power accelerators
Miniature solid-state switched spiral generator for the cost effective, programmable triggering of large scale pulsed power accelerators Open
This paper presents the design and testing of several different configurations of spiral generator, designed to trigger high current switches in the next generation of pulsed power devices. In particular, it details the development of spir…
View article: High velocity outflows along the axis of pulsed power driven rod z-pinches
High velocity outflows along the axis of pulsed power driven rod z-pinches Open
We report on initial observations of high velocity outflows from the ends of a rod compressed using pulsed power. 1 mm and 2 mm diameter copper rods were placed in a water bath and driven by ∼0.6 MA currents with rise times of ∼700 ns. Las…
View article: Pulsed power driven cylindrical wire array explosions in different media
Pulsed power driven cylindrical wire array explosions in different media Open
Cylindrical copper wire array explosions were carried out in de-ionized water, sodium polytungstate solution, nitromethane, and polyester in order to obtain high energy density conditions in the vicinity of implosion using the generated co…
View article: X-ray radiography of the overheating instability in underwater electrical explosions of wires
X-ray radiography of the overheating instability in underwater electrical explosions of wires Open
We present the measurements of the development of striation like instabilities during the electrical driven explosions of wires in a water bath. In vacuum based wire explosion experiments, such instabilities have long been known. However, …
View article: Synchrotron based X-ray radiography of convergent shock waves driven by underwater electrical explosion of a cylindrical wire array
Synchrotron based X-ray radiography of convergent shock waves driven by underwater electrical explosion of a cylindrical wire array Open
We present X-ray radiography images showing the propagation of shock waves generated by electrical explosion of a cylindrical arrangement of wires in water driven by pulsed power. In previous experiments [S. N. Bland et al., Phys. Plasmas …
View article: Use of synchrotron-based radiography to diagnose pulsed power driven wire explosion experiments
Use of synchrotron-based radiography to diagnose pulsed power driven wire explosion experiments Open
We describe the first use of synchrotron radiation to probe pulsed power driven high energy density physics experiments. Multi-frame x-ray radiography with interframe spacing of 704 ns and temporal resolution of <100 ps was used to diag…
View article: Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions
Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions Open
We present the first use of synchrotron-based phase contrast radiography to study pulsed-power driven high energy density physics experiments. Underwater electrical wire explosions have become of interest to the wider physics community due…