Characteristics of a molybdenum X-pinch X-ray source as a probe source for X-ray diffraction studies

Abstract

X-ray emission from a molybdenum X-pinch has been investigated as a potential probe for the high pressure states made in dynamic compression experiments. Studies were performed on a novel 300 kA, 400 ns generator which coupled the load directly to a low inductance capacitor and switch combination. The X-pinch load consisted of 4 crossed molybdenum wires of 13 μm diameter, crossed at an angle of 62°. The load height was 10 mm. An initial x-ray burst generated at the wire crossing point, radiated in the soft x-ray range (hυ < 10 keV). This was followed, 2-5 ns later, by at least one harder x-ray burst (hυ > 10 keV) whose power ranged from 1 to 7 MW. Time integrated spectral measurements showed that the harder bursts were dominated by K-alpha emission; though, a lower level, wide band continuum up to at least 30 keV was also present. Initial tests demonstrated that the source was capable of driving Laue diffraction experiments, probing uncompressed samples of LiF and aluminium.

Relativistically Intense Laser–Microplasma Interactions

“…240,241]. X-pinches produce small (µm-scale) high peak power (100 GW) sources that can be used for inline PCI with pulse duration of several tens of ps [242,243]. The generation of sub-ps X-ray bursts from laser-solid interactions is established and has been used to study several physical systems mainly focused on temporal resolution rather than additional techniques like phase contrast imaging [43].…”

Multichannel analytical x-ray system on the basis of bright microfocus source

“…Сравнительно эффективным средством гене рации рентгеновского излучения являются уста новки с использованием Z и Xпинча [5][6][7]. Эффект сжатия токового канала под действием магнит ного поля, индуцированного сильным током в тонких металлических проволоках, обеспечивает получение высокотемпературной плазмы, излу чающей в полный телесный угол в широком рент геновском диапазоне спектра, при эффективном размере фокуса около 10 мкм.…”

“…A c o mp a r at ive ly e f fe c t ive tool of generating Xrays is the installation using Z and Xpinch [5][6][7]. The effect of compression of the c ur rent channel under t he i n fluence of a m ag net ic field induced by the strong cur rent in the thin metal wires pro duces hightemperature plasma emitting the full solid angle in a wide Xray spectrum with the effective focus size of about 10 µm.…”

A portable X-pinch design for x-ray diagnostics of warm dense matter

“…14 Immediately following the compression, an electron cascade accelerated across the anode-cathode (A-K) gap hits the dense plasma mini-diode, yielding harder (E > 10 keV) bremsstrahlung radiation over multiple nanoseconds (hard hot spot) with a typical source size >50 μm. Spectral features of the radiation produced by an X-pinch include strong emission lines that can be used for x-ray diffraction measurements 15 and smooth broadband continua-due to the intense pressures and densities reached in the hot spot-that can be exploited for absorption spectroscopy. 16 Until recently, high-current pulsed power systems were typically designed around Marx banks (oil-filled reservoirs with capacitors connected by SF 6 -filled switches) and pulse-sharpening transmission lines filled with deionized water.…”