Marx generator

About: Marx generator is a research topic. Over the lifetime, 1276 publications have been published within this topic receiving 8970 citations.

Additional lens for TEM horn antenna and transient high-power application: Design and Characterization in time domain

Abstract: This paper presents the design of a dielectric lens dedicated to transient High Power Microwaves (HPM) short pulses radiation. The proposed lens has been developed as an optional component that could be used to increase the directivity, and therefore the range, of a mobile HPM source. The associated emitter consists in a TEM horn, powered by a Marx generator and a dedicated pulse forming line (400 kV - 50 Ohms output voltage, total duration of 1.5 ns) [1]. The emission of very high amplitude nanosecond signals covers an ultra-wideband of frequencies, so the design of the lens was carried out in time domain. Here, the goal was to convert the pseudo spherical wave into a plane wave at the aperture of the aerial, for the considered impulse. Once manufactured, the near fields and the far fields have been measured with and without the lens. The maximum gain increases by at least 6 dB beyond 1.3 GHz and can reach 12 dB for higher frequencies. In time domain, the peak amplitude has been multiplied by a factor 2.65 allowing to reach a figure of merit of 2 MV/m.

All-solid-state Marx generator

Abstract: The invention provides an all-solid-state Marx generator The all-solid-state Marx generator comprises at least one circuit unit Each circuit unit comprises a diode, a capacitor, a first MOSFET (metal-oxide-semiconductor field-effect transistor) power tube and a second MOSFET power tube, wherein one end of the capacitor is connected with a cathode of the diode and a drain electrode of the first MOSFET power tube, the other end of the capacitor is connected with a source electrode of the second MOSFET power tube, and a source electrode of the first MOSFET power tube is connected with a drain electrode of the second MOSFET power tube The all-solid-state Marx generator has the advantages of small size and high stability

SYSTEM OF 500 kV MARX GENERATOR FOR LIA-10 RADIAL LINES CHARGING

Abstract: In -0.g j is time the radial lines of 48 cavities in thc lincar induction accclcrator LIA-10 arc chargcd up to 400500 kV with 16 five-stage one-circuit Marx generator. Thc gcncrator clcctric schcmc is prcscntcd as wcll as somc of its design peculiarities, the arrangement and characteristics of gas-filled trigatrotis in the stages. Stored energy is 6.25 kJ. cquivalcnt capacitancc is 0.05 pF. output voltagc is -500 kV, circuit inductance is -2.5 jiHs At -100 % electrical strength rcscrvc for thc switchcs and with synchronizcd triggering of all generators the maximum jitter is +I5 ns for -lo4 shots. During 15 years the generators set has operated successfully in LIA-10. In lincar induction accclcrator LIA10 [ 1) thc accelerating system comprises 16 accelerator units with 96 radial watcr-insulatcd lincs for accelerating voltagc pulsc formation. In -0.8 ps time the capacitances of 6 radial lines of each unit are charged up to 400-500 kV by Marx generators (Ma), thrcc cavitys by its own gcncrators. which constitute a pulse charging setup of 16 MWs in total. Basic requirement to this sctup high rcliability and synchronous operation of all MWs at high reserve of electric strength in a series of 5 ~ 1 0 ~ joint switchings. So. thc clcctric schcmc and dcsign of a singlc MG wcrc claboratcd at first, and thc subsequent assembling of all M a ' s was done of single-type tcstcd units an componcnts that has simplified thc systcm fabrication, adjustment and operation. In Fig.1 thc clcctrical schcmc of a fivc-stagc MG is presented. As energy storage C for cach stage onc capacitor 0.25 pF 100 kV is uscd, Commutators S1-S5 arc identical trigatron controlled with a field disturbance technique. The SI electrodes conncctions with thc first stagc componcnts diffcr from thc ones in the second and the third stages, which connectors diffcr in thcir turn from thc oncs in thc fourth and thc fifth stages. Thc voltagc pulsc Ut of thc positivc polarity trigger SI being applied via capacitor C, 250 pF and resistor R, = 51 R . Thc subscqucnt trigatron S2-S5 opcration in is initiated with pulsed potential differences appeared between its clcctrodcs at thc trigatron brcakdown in thc prcvious stagc. Thc intcr-clcctrodc switch capacitanccs in thc stagc C 1= 110 pF, C2-50 pF, C3-15 pF, C4=13 pF. CS-10 pF play an important rolc; thcy arc shown only as an cxamplc in the second stage. After SI breakdown the potential of the main clcctrodc E l in 52 dccrcasc rapidly from +U up to zcro duc to C4 dischargc via R4=300 R and SI. rcsulting in the probable pulsed potential difference of U magnituds bctwccn thc control clcctrodc EC and El , and bctwccn EC and the second main electrode E2 it may constitute -1.7U. A s thc EC potcntial is positivc in rcgard to thc both main 4 C

High Repetition Rate Table‐Top Soft X‐Ray Lasers in Capillary Discharges and Laser‐Created Plasmas

Abstract: We discuss very recent advances in high repetition rate soft x‐ray lasers resulting from the use of two different types of hot dense plasmas: fast capillary discharges and laser‐created plasmas. We have demonstrated a new high repetition rate 46.9 nm capillary discharge laser that fits onto the surface area of a small desk and that operates at a relatively low voltage, therefore not requiring a Marx generator. Laser pulses with an energy of ∼ 13 μJ are generated at repetition rates up to 12 Hz. About (2–3)×104 laser shots can be generated with a single capillary. This new type of portable laser is an easily accessible source of intense short wavelength laser light for applications. We also discuss the demonstration of 5 Hz repetition rate table‐top soft x‐ray lasers producing microwatt average powers at wavelengths ranging from 13.2 to 33 nm. The results were obtained by collisional electron excitation of Ni‐like and Ne‐like ions in plasmas efficiently heated with a picosecond optical laser pulse impingin...

Approximate square wave Marx generator based on magnetic switch

Abstract: The invention discloses an approximate square wave Marx generator based on a magnetic switch, which sequentially comprises four parts: a primary discharge unit, a saturable pulsed transformer unit, aMarx generator unit and a discharge unit, wherein a main body part is used for generating an approximate square wave pulse; by adopting the technical scheme of the Marx generator which combines additional regulation capacitance with inverse voltage superposition, output of the square wave pulse is implemented, and by combining a pulse width regulation switch, regulation on a width of the output square wave pulse is implemented A structure and a principle of an existing Marx generator which can generate the approximate square wave pulse are simplified, compactness and a solid state of a hundred-nanosecond order square wave Marx generator are implemented, and the gap of such type of pulse generator at home and abroad is filled up