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Title: Impedance-matched Marx generators

Abstract

We have conceived a new class of prime-power sources for pulsed-power accelerators: impedance-matched Marx generators (IMGs). The fundamental building block of an IMG is a brick, which consists of two capacitors connected electrically in series with a single switch. An IMG comprises a single stage or several stages distributed axially and connected in series. Each stage is powered by a single brick or several bricks distributed azimuthally within the stage and connected in parallel. The stages of a multistage IMG drive an impedance-matched coaxial transmission line with a conical center conductor. When the stages are triggered sequentially to launch a coherent traveling wave along the coaxial line, the IMG achieves electromagnetic-power amplification by triggered emission of radiation. Hence a multistage IMG is a pulsed-power analogue of a laser. To illustrate the IMG approach to prime power, we have developed conceptual designs of two ten-stage IMGs with L C time constants on the order of 100 ns. One design includes 20 bricks per stage, and delivers a peak electrical power of 1.05 TW to a matched-impedance 1.22-Ω load. The design generates 113 kV per stage and has a maximum energy efficiency of 89%. The other design includes a single brick permore » stage, delivers 68 GW to a matched-impedance 19-Ω load, generates 113 kV per stage, and has a maximum energy efficiency of 90%. In conclusion, for a given electrical-power-output time history, an IMG is less expensive and slightly more efficient than a linear transformer driver, since an IMG does not use ferromagnetic cores.« less

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1350788
Alternate Identifier(s):
OSTI ID: 1467458
Report Number(s):
SAND-2018-6458J
Journal ID: ISSN 2469-9888; PRABCJ; 664474
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 4; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Stygar, W. A., LeChien, K. R., Mazarakis, M. G., Savage, M. E., Stoltzfus, B. S., Austin, K. N., Breden, E. W., Cuneo, M. E., Hutsel, B. T., Lewis, S. A., McKee, G. R., Moore, J. K., Mulville, T. D., Muron, D. J., Reisman, D. B., Sceiford, M. E., and Wisher, M. L.. Impedance-matched Marx generators. United States: N. p., 2017. Web. doi:10.1103/PhysRevAccelBeams.20.040402.
Stygar, W. A., LeChien, K. R., Mazarakis, M. G., Savage, M. E., Stoltzfus, B. S., Austin, K. N., Breden, E. W., Cuneo, M. E., Hutsel, B. T., Lewis, S. A., McKee, G. R., Moore, J. K., Mulville, T. D., Muron, D. J., Reisman, D. B., Sceiford, M. E., & Wisher, M. L.. Impedance-matched Marx generators. United States. doi:10.1103/PhysRevAccelBeams.20.040402.
Stygar, W. A., LeChien, K. R., Mazarakis, M. G., Savage, M. E., Stoltzfus, B. S., Austin, K. N., Breden, E. W., Cuneo, M. E., Hutsel, B. T., Lewis, S. A., McKee, G. R., Moore, J. K., Mulville, T. D., Muron, D. J., Reisman, D. B., Sceiford, M. E., and Wisher, M. L.. Fri . "Impedance-matched Marx generators". United States. doi:10.1103/PhysRevAccelBeams.20.040402.
@article{osti_1350788,
title = {Impedance-matched Marx generators},
author = {Stygar, W. A. and LeChien, K. R. and Mazarakis, M. G. and Savage, M. E. and Stoltzfus, B. S. and Austin, K. N. and Breden, E. W. and Cuneo, M. E. and Hutsel, B. T. and Lewis, S. A. and McKee, G. R. and Moore, J. K. and Mulville, T. D. and Muron, D. J. and Reisman, D. B. and Sceiford, M. E. and Wisher, M. L.},
abstractNote = {We have conceived a new class of prime-power sources for pulsed-power accelerators: impedance-matched Marx generators (IMGs). The fundamental building block of an IMG is a brick, which consists of two capacitors connected electrically in series with a single switch. An IMG comprises a single stage or several stages distributed axially and connected in series. Each stage is powered by a single brick or several bricks distributed azimuthally within the stage and connected in parallel. The stages of a multistage IMG drive an impedance-matched coaxial transmission line with a conical center conductor. When the stages are triggered sequentially to launch a coherent traveling wave along the coaxial line, the IMG achieves electromagnetic-power amplification by triggered emission of radiation. Hence a multistage IMG is a pulsed-power analogue of a laser. To illustrate the IMG approach to prime power, we have developed conceptual designs of two ten-stage IMGs with L C time constants on the order of 100 ns. One design includes 20 bricks per stage, and delivers a peak electrical power of 1.05 TW to a matched-impedance 1.22-Ω load. The design generates 113 kV per stage and has a maximum energy efficiency of 89%. The other design includes a single brick per stage, delivers 68 GW to a matched-impedance 19-Ω load, generates 113 kV per stage, and has a maximum energy efficiency of 90%. In conclusion, for a given electrical-power-output time history, an IMG is less expensive and slightly more efficient than a linear transformer driver, since an IMG does not use ferromagnetic cores.},
doi = {10.1103/PhysRevAccelBeams.20.040402},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 20,
place = {United States},
year = {Fri Apr 07 00:00:00 EDT 2017},
month = {Fri Apr 07 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevAccelBeams.20.040402

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Works referenced in this record:

Water-dielectric-breakdown relation for the design of large-area multimegavolt pulsed-power systems
journal, July 2006

  • Stygar, W. A.; Wagoner, T. C.; Ives, H. C.
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Low-inductance gas switches for linear transformer drivers
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