Design of pulsed guiding magnetic field for high power microwave generators

Ju, Jinchuan; Zhang, H.; Zhang, J.; Shu, Ting; Zhong, Huihuang

doi:10.1063/1.4894204

Cited by 7 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An intense electron beam was produced by a knife-edge graphite cathode with an average radius of 4 cm under the mechanism of explosive electron emission 27 . Propagation of the electron beam in the TKA was guided by a longitudinal magnetic field supplied by a solenoid 28 . A small klystron amplifier with an output power of 60 kW was employed as the seed source, whose central frequency and bandwidth were 9.375 GHz and 20 MHz, respectively.…”

Section: Resultsmentioning

confidence: 99%

Towards coherent combining of X-band high power microwaves: phase-locked long pulse radiations by a relativistic triaxial klystron amplifier

Zhang

et al. 2016

Sci Rep

View full text Add to dashboard Cite

The radio-frequency breakdown due to ultrahigh electric field strength essentially limits power handling capability of an individual high power microwave (HPM) generator, and this issue becomes more challenging for high frequency bands. Coherent power combining therefore provides an alternative approach to achieve an equivalent peak power of the order of ∼100 GW, which consequently provides opportunities to explore microwave related physics at extremes. The triaxial klystron amplifier (TKA) is a promising candidate for coherent power combing in high frequency bands owing to its intrinsic merit of high power capacity, nevertheless phase-locked long pulse radiation from TKA has not yet been obtained experimentally as the coaxial structure of TKA can easily lead to self-excitation of parasitic modes. In this paper, we present investigations into an X-band TKA capable of producing 1.1 GW HPMs with pulse duration of about 103 ns at the frequency of 9.375 GHz in experiment. Furthermore, the shot-to-shot fluctuation standard deviation of the phase shifts between the input and output microwaves is demonstrated to be less than 10°. The reported achievements open up prospects for accomplishing coherent power combining of X-band HPMs in the near future, and might also excite new development interests concerning high frequency TKAs.

show abstract

Section: Resultsmentioning

confidence: 99%

Towards coherent combining of X-band high power microwaves: phase-locked long pulse radiations by a relativistic triaxial klystron amplifier

Zhang

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The guiding Magnetic field may be generated by means of a super conducting coil, water cooled DC coil or pulsed magnetic field coil [11,12]. For single pulse system it is always preferable to use a pulsed magnetic field coil.…”

Section: Introductionmentioning

confidence: 99%

X-band BWO directly driven by a Marx generator

et al. 2020

View full text Add to dashboard Cite

A: X-band Resonant Reflector (RR) based Backward Wave Oscillators (BWO) has been designed and tested on a Marx generator. Output power dependence on the Resonant Reflector-BWO separation as well as on the applied magnetic field has been investigated using particle-in-cell (PIC) simulation. It was observed that the output power gets maximized for 3.0 T guiding magnetic field. The PIC simulation predicted BWO frequency as 9.22 GHz. BWO is operated on a Marx generator with peak diode voltage of 400 kV, and 4.0 kA as peak current. Microwave power was measured by D-dot probe placed in the far field region of the transmitting antenna. The measured peak output power was 120 MW at 9.35 GHz frequency for 0.7 T guiding magnetic field. At high magnetic field of 3.0 T the BWO peak power increased to 350 MW, however the frequency reduces to 9.25 GHz.

show abstract

A multifunctional energy-saving magnetic field generator

Xiong

Sun

Liu

et al. 2018

Review of Scientific Instruments

View full text Add to dashboard Cite

To improve the energy utilization of magnetic field generators for biological applications, a multifunctional energy-saving magnetic field generator (ESMFG) is presented. It is capable of producing both an alternating magnetic field (AMF) and a bipolar pulse magnetic field (BPMF) with high energy-saving and energy-reuse rates. Based on a theoretical analysis of an RLC second-order circuit, the energy-saving and energy-reuse rates of both types of magnetic fields can be calculated and are found to have acceptable values. The results of an experimental study using the proposed generator show that for the BPMF, the peak current reaches 130 A and the intensity reaches 70.3 mT. For the AMF, the intensity is 11.0 mT and the RMS current is 20 A. The energy-saving and energy-reuse rates for the AMF generator are 61.3% and 63.5%, respectively, while for the BPMF generator, the energy-saving rate is 33.6%. Thus, the proposed ESMFG has excellent potential for use in biomedical applications.

show abstract

Design of pulsed guiding magnetic field for high power microwave generators

Cited by 7 publications

References 18 publications

Towards coherent combining of X-band high power microwaves: phase-locked long pulse radiations by a relativistic triaxial klystron amplifier

Towards coherent combining of X-band high power microwaves: phase-locked long pulse radiations by a relativistic triaxial klystron amplifier

X-band BWO directly driven by a Marx generator

A multifunctional energy-saving magnetic field generator

Contact Info

Product

Resources

About