Stacked Blumlein pulse generators

Davanloo, F.; Korioth, J.L.; Borovina, D.L.; Krause, R.K.; Collins, C. B.; Agee, F.J.; Hull, J.H.; Kingsley, L.E.

doi:10.1109/modsym.1996.564481

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…While PFLs deliver very high quality voltage flat-tops to matched loads, they seldom lend themselves to compact designs. Solid dielectric pulse forming lines have the potential to store pulse energy, and the PFL may also be stacked similarly to a Marx bank to facilitate voltage scaling of the output [4,6]. For common polymer insulators with dielectric constants less than five, the resulting PFL can be quite long.…”

Section: Introductionmentioning

confidence: 99%

Switching Requirements for Stacked Blumleins Commutated by Individual Switches

Domonkos

2006

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium

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-Stacked Blumlein lines with solid dielectric potentially offer a compact pulsed power system for a variety of applications by combining the energy storage, voltage scaling, and pulse forming functions into a single device. By stacking the lines physically, not simply electrically, the line is made more compact because adjacent lines share electrodes. This design does not lend itself to the use of a single switch to commutate the stacked line, and multiple switches are far simpler to implement. The switch jitter and electrical characteristics strongly influence the performance of the line and the stresses on the dielectric. This paper explores the effects of switch jitter, inductance, the resistive decay during closure, and the closed-state resistance on the output pulse and dielectric stresses for stacked Blumlein lines using SPICE simulations. The impact of switch operation on the necessary dielectric strength and the quality of pulse is presented.The suitability of various switch technologies to meet the performance requirements is also discussed.

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Section: Introductionmentioning

confidence: 99%

Switching Requirements for Stacked Blumleins Commutated by Individual Switches

Domonkos

2006

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium

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“…Typically transformer oil Others have developed stacked Blumlein lines [6,7,8,9], and or a pressurized gas is used to insulate high-voltage pulsed the primary innovations in the present work deal with the power systems, although this leads to additional dielectric material and the stored energy density enabled by components and sub-systems, further confounding efforts the dielectric. An eight stage variant of the Blumlein line is to minimize system size.…”

mentioning

confidence: 99%

“…The stacked similarly to a Marx bank to facilitate voltage results of the tests are presented along with projections for scaling of the output. [4,6] For common dielectrics the the future development of this technology. resulting PFL suffers from a poor energy storage density compared with other options for many compact pulsed…”

mentioning

confidence: 99%

A Ceramic Loaded Polymer Blumlein Pulser for Compact, Rep-Rated Pulsed Power Applications

Domonkos

Turchi

Parker

et al. 2005

2005 IEEE Pulsed Power Conference

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lesser extent rejecting waste heat in high duty rep-rated systems.The design of compact pulsed power systems involves In cases where the desired output voltage is greater the trade between size, pulse length, and pulse shape. A than 100-kV, a Marx topology, a pulse transformer, or stacked Blumlein line with high dielectric constant material some combination of both is used to scale the voltage can deliver a voltage flattop to a matched load with an delivered by the power supply.[4] For compact pulse energy density similar to capacitor banks. By imbedding generators, the Marx topology is more commonly used nano-scale titanate particles in an epoxy matrix, a since it reduces sub-system count by combining the energy composite material with a relative permittivity in the range storage and power scaling sub-systems. [4,5] Voltage of 30 to 60 may be realized without the drastic loss in scaling is an essential function of compact pulsed power dielectric strength associated with large area ceramics. So systems since the system size is strongly driven by the called ceramic loaded polymer dielectric employed in a storage voltage.[2] Modest pulse shaping can be Blumlein line facilitates the fabrication of a compact pulse accomplished with Marx banks by the inclusion or forming line potentially suitable for driving loads of several reduction of inductance between stages. Typically large tens of Ohms in the GW power range for greater than 100 rep-rate systems will incorporate a pulse forming line ns. This paper describes the initial efforts to fabricate and (PFL) to shape the pulse, whereas, compact systems may test a parallel plate Blumlein incorporating ceramic loaded use a Marx pulse forming network (PFN) topology to polymer dielectric.Two single-stage parallel plate address pulse shaping. While PFLs deliver very high Blumlein lines were fabricated with different ceramic quality voltage flat-tops to matched loads, they seldom lend loading. The lines were designed to yield a 50 ns pulse into themselves to compact designs. Conversely, the flexibility a 6.25 Q load. The Blumlein lines were designed to be to tune a PFN for a load generally competes with the desire charged to 62.5 kV, and both fabricated units held the to make a compact system, and a network increases the part charge voltage in static tests. A small railgap switch was count. Solid dielectric pulse forming lines have the fabricated for use with the Blumlein lines. A mid-plane potential to store pulse energy. The PFL may also be knife-edge electrode was used to trigger the switch. The stacked similarly to a Marx bank to facilitate voltage results of the tests are presented along with projections for scaling of the output. [4,6] For common dielectrics the the future development of this technology. resulting PFL suffers from a poor energy storage density compared with other options for many compact pulsed

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Theoretical Investigation of a UV Laser Triggered Spark Gap

Worts

Kovaleski

2005

2005 IEEE Pulsed Power Conference

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beginning and end of the life cycle of the arc in the laser triggered gas switch. A model of a spark gap used as a shorting switch in a Blumlein pulsed power system has been developed. The II. MODELS spark gap is a gas-filled switch that is triggered by an ultraviolet laser pulse. Methods of reducing the rate at A. Kinetic Model which the resistance of the arc falls are the focus of thisThe simulation space of the spark gap had a rectangular investigation. The model consists of two separate parts: a shape, 0.6 mm high and 0.3 mm wide. The size was kinetic model, which shows the formation of the plasma chosen to be the smallest possible to encompass the entire streamer, and a fluid model, which describes the behavior width of the streamer, but large enough that few electrons of the arc after the connection is made. The kinetic model escape the sides of the simulation. The simulation space results represent the initial conditions of the arc described was divided into square grids roughly half the Debye by the fluid model. Increases in the initial radius of the length, around 0.5 ptm. The grid dimensions were arc resulted in lower resistance for the first 10 ns after the 512x1028. This allowed for plasma with XD > 1 Ztm to be connection is made, while changes in conductivity simulated stably. The top boundary of the simulation showed a consistent reduction of the current throughout space represented the high potential electrode and was the life of the arc. Reorienting the laser trigger spot modeled as an equipotential boundary with a DC bias of yielded the most significant increase in the initial radius 1800 V or 2400 V. The bottom boundary, which of the streamer, 25%.represented the low potential electrode, was modeled as a grounded conductor. These two boundaries established a I. INTRODUCTION linear electric field of 3 MV/m or 4 MV/m, respectively.The side boundaries were modeled as a dielectric with a relative permittivity of one to simulate a gas dielectric.Blumleins are well known compact pulsed power ty , sources [1]. A Blumlein is two transmission lines stacked Argon or Neon at room temperature filled the simulation together with the center plate charged to a high voltage space at a pressure of 1 atm. These conditions represent and the load connected between the low potential plates. the intrinsic switch characteristics and were varied to When one of the transmission lines is shorted by a switch, determine the effect on the streamer radius and the a high voltage pulse appears across the load. This effect streamer conductivity at the end of the simulation time.a high voltage pulse appears across the load. This effect Inzto a eeae ntesic ouea is cumulative; several Blumleins stacked will produce Ionzation was enerated in the switch volume at a several times the original voltage [2-3]. One possible fixed rate. This rate can either represent the small amount shorting switch for the transmission lines in a Blumlein is of aioi taturallocrring in the switc space a laser triggered, gas-filled spark gap [4]. A spark g...

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Stacked Blumlein pulse generators

Cited by 5 publications

References 9 publications

Switching Requirements for Stacked Blumleins Commutated by Individual Switches

Switching Requirements for Stacked Blumleins Commutated by Individual Switches

A Ceramic Loaded Polymer Blumlein Pulser for Compact, Rep-Rated Pulsed Power Applications

Theoretical Investigation of a UV Laser Triggered Spark Gap

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