Reducing Radiation Dose by Using Pulse X-Ray Apparatus

Komarskiy, A. A.; Chepusov, A. S.; Kuznetsov, V. L.; Korzhenevskiy, S. R.; Niculin, S. P.; Cholakh, S. O.

doi:10.4236/jbm.2014.22003

Cited by 7 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, short pulse X-ray sources can be effectively used both as non-destructive testing machines and as medical apparatus. Such systems decrease necessary dose by several times comparing with similar complexes based on continuous X-ray radiation [39].…”

Section: Jinst 13 P08001mentioning

confidence: 99%

Solid-state repetitive generators of short GW-range pulses: a review

Rukin¹

2018

J. Inst.

View full text Add to dashboard Cite

The paper presents a brief review of solid-state repetitive generators of nano- and subnanosecond pulses with GW-range of peak power developed by Institute of Electrophysics. The base of the described approach for obtaining such pulses consists in using solid-state generators with its output unit containing intermediate inductive storage and semiconductor opening switch (SOS). The most powerful SOS generator of S-500 type is described. The generator provides a peak power of up to 6 GW, an output voltage of 500–900 kV, a voltage rise time of 2–3 ns, a pulse length (full width at half maximum, FWHM) of 5–7 ns across external loads of 40–100 Ω, and a pulse repetition frequency up to 1 kHz in the burst mode of operation. To reduce the voltage rise time of S-500 generator semiconductor sharpeners are used. The sharpeners are made as stacks of series-connected dynistor structures built into an oil-filled coaxial line at the place of an inner conductor. An input voltage pulse has the amplitude of 540 kV with the rise time of ∼1.2 ns and voltage rise rate of ∼0.3 MV/ns. After pulse propagation through the sharpening sections, its rise time is reduced down to 360 ps, and the voltage rise rate is increased up to ∼0.95 MV/ns. Peak power of the sharpened pulse is within the range of 4.5–5.5 GW. It is shown, that gyromagnetic nonlinear transmission line (NLTL) can operate as a magnetic pulse compressor. At such an operating regime, the duration of the input pulse is close to the period of generated oscillations, and the main part of the input pulse energy is transmitted only to the first peak of the oscillations. In energy compression experiments, the input pulse with amplitude of 500 kV and FWHM of 7 ns is applied to the NLTL. At the output of the NLTL in 40 Ω coaxial transmission line, the pulse amplitude is increased to 740 kV and the pulse duration is reduced to ∼2 ns, which correspond to power amplification of the input pulse from ∼6 to ∼13 GW. In pulse sharpening experiments, a three-stage NLTL is used. The system provides a peak power of 15 GW in 44-Ω line, FWHM of 120 ps, and a record high level of the voltage rise rate of 10 MV/ns. Applications of the developed generators are given.

show abstract

Section: Jinst 13 P08001mentioning

confidence: 99%

Solid-state repetitive generators of short GW-range pulses: a review

Rukin¹

2018

J. Inst.

View full text Add to dashboard Cite

show abstract

Application of Carbon Materials for Creation of X-ray Sources Cathodes

Chepusov

Komarskiy

Korzhenevskiy

et al. 2016

Materials Today: Proceedings

View full text Add to dashboard Cite

Pulsed power technology based on semiconductor opening switches: A review

Rukin

2020

Review of Scientific Instruments

View full text Add to dashboard Cite

This paper presents a systematized review of the research on the production of nanosecond high-power pulses using solid-state generators based on an inductive energy store and a semiconductor opening switch that have been performed in the past 25 years. This research has been underway since 1992–1993 when the nanosecond cutoff of ultrahigh-density currents in semiconductor diodes was discovered and named the SOS (Semiconductor Opening Switch) effect. The discovery of the SOS effect provided a breakthrough in the development of semiconductor generators, as their most important characteristics, such as pulse power and output voltage, were increased tens and hundreds of times compared with previously known semiconductor generators. In particular, in the nanosecond semiconductor technology, megavolt voltages combined with gigawatt peak powers have been achieved. This review considers the main physical processes that determine the mechanism of operation of a SOS based on the SOS effect. The principle of operation, design, and characteristics of SOS diodes and SOS generators is described, and prospects for their further development are discussed. Examples are given of using SOS generators in various pulsed power applications such as electron accelerators, X-ray pulse devices, high-power microwave electronics, pumping of gas lasers, and ignition of electrical discharges.

show abstract

Reducing Radiation Dose by Using Pulse X-Ray Apparatus

Cited by 7 publications

References 1 publication

Solid-state repetitive generators of short GW-range pulses: a review

Solid-state repetitive generators of short GW-range pulses: a review

Application of Carbon Materials for Creation of X-ray Sources Cathodes

Pulsed power technology based on semiconductor opening switches: A review

Contact Info

Product

Resources

About