A pulsed power generator for x-pinch experiments

Zou, Xiaobing; Li, Rui; Zeng, Naigong; Han, Min−Koo; Yuan, Jianhua; Wang, Xinxin; Zhang, Guixin

doi:10.1017/s0263034606060666

Cited by 51 publications

(19 citation statements)

References 9 publications

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“…In recent years, with the development of pulsed power technology Kuai et al, 2009;Liu et al, 2006;Yatsui et al, 2005;Zou et al, 2006), devices generating high power microwave (HPM) have been developed greatly (Benford et al, 2007;He et al, 2011;Li et al, 2010;Tang et al, 2013;Zhang et al, 2010). And power level in excess of 1 GW has been achieved in a number of cases (Cao et al, 2012a;Eltchaninov et al, 2003;Gao et al, 2012;Ge et al, 2010;Jin et al, 2011;Xiao et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

A Ku-band coaxial relativistic transit-time oscillator with low guiding magnetic field

Ling

Zhang

et al. 2014

Laser Part. Beams

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A novel coaxial relativistic transit-time oscillator with low guiding magnetic field is proposed and investigated to generate high power microwave at Ku-band. With the coaxial structure and a quasi body wave adopted as the operating mode, the device has a larger space-charge limiting current, higher power handling capacity, and lower guiding magnetic field. Moreover, for further improving the output power, a coaxial TM 02 mode resonant reflector is well designed. Main structure parameters of the device are optimized by particle in cell simulations. A typical simulation result is that, with a 358 keV, 7.25 kA beam guided by a magnetic field of about 0.7 T, an 810 MW microwave pulse at 14.25 GHz is generated, yielding a conversion efficiency of about 31%. The primary experiments are also carried out. At a low guiding magnetic field of 0.7 T, a microwave pulse with power of 400 MW, pulse duration of 30 ns, frequency of 14.3 GHz close to the simulation one, and efficiency of 15.4% is generated.

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Section: Introductionmentioning

confidence: 99%

A Ku-band coaxial relativistic transit-time oscillator with low guiding magnetic field

Ling

Zhang

et al. 2014

Laser Part. Beams

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“…Intense electron-beam accelerators (IEBA) based on the Blumlein line (Friedman et al, 1988;Phelps et al, 1990;Liu et al, 2006) is widely used in a great variety of applications such as in lasers (Sethian et al, 2000;Apruzese et al, 2006), high power microwave generators (HPMG) (Clark et al, 1988;Fan et al, 2008;He et al, 2011), X-pinch (Zou et al, 2006;Li et al, 2008), X-ray generation (Coogan et al, 1990;Kuai et al, 2009), and so on. At present, the increase of power and repetitive rate and the duration of the output pulse (Liu et al, 2007a;Yatsui et al, 2005) are the important development trend for an accelerator.…”

Section: Introductionmentioning

confidence: 99%

Output voltage waveform analysis of an intense electron beam accelerator based on strip spiral Blumlein line

et al. 2012

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The Blumlein pulse forming line (BPFL) consisting of an inner coaxial pulse forming line (PFL) and an outer coaxial PFL is widely used in the field of pulsed power, especially for intense electron-beam accelerators (IEBA). The output voltage waveform determines the quality and characteristics of the output beam current of the IEBA. Comparing with the conventional BPFL, an IEBA based on a strip spiral type BPFL can increase the duration of the output voltage in the same geometrical volume. However, for the spiral type BPFL, the voltage waveform on a matched load may be distorted, which influences the electron-beam quality. In this paper, the output waveform of an IEBA based on strip spiral BPFL is analyzed. It is found that there is fluctuation on the flattop of the main pulse, and the flatness is increased with the increment of the output voltage. According to the time integrated pictures of the cathode holder during the operation of the IEBA, the electron emission of the cathode holder is one of the reasons to cause the variance of the flatness. Furthermore, the distribution of the current density of spiral middle cylinder of the BPFL is calculated by using electromagnetic simulation software, and it is obtained that the current density is not uniform, and which leads to the nonuniformity of the impedance of BPFL. Meanwhile, when the nonuniformity of the BPFL is taken into account, the operation of the whole accelerator is simulated using a circuit-simulation code called PSpice. It is obtained that the nonuniformity of the BPFL influences the flatness of the output voltage waveform. In order to get an ideal square pulse voltage waveform and to improve the electron beam quality of such an accelerator, the uniformity of the spiral middle cylinder should be improved and the electron emission of the cathode holder should be avoided. The theoretical analysis and simulated output voltage waveform shows reasonable agreement with that of the experimental results.

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“…Lasers, pulsed power machines, high explosives and intense particle beams from accelerators are commonly used experimental tools to generate high energy density states in matter (Fortov et al 2007;Hora 2007;Tahir et al 2007b;Varentsov et al 2007a;Zou et al 2006;Zvorykin et al 2007). Among these techniques heavy ion beams are relatively new (Varentsov et al 2007b).…”

Section: Introductionmentioning

confidence: 99%

High energy density physics generated by intense heavy ion beams

Hoffmann

Фортов

Kuster

et al. 2009

Astrophys Space Sci

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Intense ion beams from accelerators are now available to generate high energy density matter and to study astrophysical phenomena in the laboratory under controlled and reproducible conditions. A detailed understanding of interaction phenomena of intense ion-and laser radiation with matter is important for a large number of applications in different fields of science, extending from basic research of plasma properties to application in energy science and the investigation of processes occurring in stellar atmospheres or even in the interior of stars and planets. Energy loss processes of heavy ions in plasma and cold matter are important for the generation of high energy density states in general and especially in the hot dense plasma of an inertial fusion target. Of special interest are phase transitions and the associated time scales when matter passes the warm dense matter regime of the phase diagram at high density but relatively low temperature. We present an overview on recent results and developments of beam plasma, and beam matter interaction processes studied with heavy ion beams and laser beams combined with accelerator and nuclear physics technology. A natural example of hot dense plasma is provided by our neighbouring star the sun, and allows a deep insight into the physics of fusion, the properties of matter at high energy density, and is moreover an excellent laboratory for astroparticle physics. As such the sun's interior plasma can even be used to probe the existence of novel particles and dark matter candidates with a combination of equipment and methods from accelerator technology and high resolution plasma spectroscopy.

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A pulsed power generator for x-pinch experiments

Cited by 51 publications

References 9 publications

A Ku-band coaxial relativistic transit-time oscillator with low guiding magnetic field

A Ku-band coaxial relativistic transit-time oscillator with low guiding magnetic field

Output voltage waveform analysis of an intense electron beam accelerator based on strip spiral Blumlein line

High energy density physics generated by intense heavy ion beams

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