Design of a high impedance MITL for RITS-3

Bailey, V.; Johnson, L. M.; Corcoran, Patrick; Smith, I.; Maenchen, J.E.; Molina, I.; Hahn, Kelly; Rovang, Dean C.; Portillo, S.; Oliver, B.V.; Rose, D. V.; Welsh, D.; Droemer, D.; Guy, T.

doi:10.1109/ppc.2003.1277737

Cited by 11 publications

(12 citation statements)

References 2 publications

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“…Finally, our center conductor design includes a 2-m-long section after the last cavity. Previous studies have shown that the electron flow current reaches an equilibrium within relatively short distances after impedance discontinuities [15], [21]- [23].…”

Section: Bound-current Estimationmentioning

confidence: 99%

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Design, Simulation, and Fault Analysis of a 6.5-MV LTD for Flash X-Ray Radiography

Leckbee

Maenchen

Johnson

et al. 2006

IEEE Trans. Plasma Sci.

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The design of a 6.5-MV linear transformer driver (LTD) for flash-radiography experiments is presented. The design is based on a previously tested 1-MV LTD and is predicted to be capable of producing diode voltages of 6.5 MV for a 50-Ω radiographic-diode load. Several fault modes are identified, and circuit simulations are used to determine their effect on the output pulse and other components. For all the identified fault modes, the peak load voltage is reduced by less than 5%.Index Terms-Circuit simulation, electron accelerator, pulse power systems, radiography, X-ray applications.

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Section: Bound-current Estimationmentioning

confidence: 99%

“…The simulation results are compared with the relativistic Brillouin flow solutions of Creedon [20], similar to the analysis presented by Bailey [15], [21]. The diode voltage V D is expressed as (see the Appendix)…”

Section: Bound-current Estimationmentioning

confidence: 99%

Design, Simulation, and Fault Analysis of a 6.5-MV LTD for Flash X-Ray Radiography

Leckbee

Maenchen

Johnson

et al. 2006

IEEE Trans. Plasma Sci.

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“…Numerical studies of the operating characteristics of RITS [7,8] demonstrate the possibility of operating the accelerator in a low impedance mode by under-matching the MITL to the accelerator induction cells. For particular MITL geometries, this can be accomplished without significantly degrading the forward power to the diode region.…”

Section: A Low Impedance -High Charge Voltage Configuration For Rits-6mentioning

confidence: 99%

Characterization of the self magnetic pinch diode at high voltages for flash radiography.

Cordova¹,

Portillo²,

Oliver³

et al. 2008

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“…Numerical studies of the operating characteristics of IVA's [7,8] demonstrate the possibility of operating the accelerator in a low impedance mode by under-matching the MITL to the accelerator induction cells. For particular MITL geometries, this can be accomplished without significantly degrading the forward power to the diode region.…”

Section: A Low Impedance Configuration For Rits-6mentioning

confidence: 99%

Demonstration of the self-magnetic-pinch diode as an X-ray source for flash core-punch radiography.

Cordova¹,

Rovang²,

Portillo³

et al. 2007

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Minimization of the radiographic spot size and maximization of the radiation dose is a continuing long-range goal for development of electron beam driven X-ray radiography sources. In collaboration with members of the Atomic Weapons Establishment(AWE), Aldermaston UK , the Advanced Radiographic Technologies Dept. 1645 is conducting research on the development of X-ray sources for flash core-punch radiography. The Hydrodynamics Dept. at AWE has defined a near term radiographic source requirement for scaled core-punch experiments to be 250 rads@m with a 2.75 mm source spot-size. As part of this collaborative effort, Dept. 1645 is investigating the potential of the SelfMagnetic-Pinched (SMP) diode as a source for core-punch radiography. Recent experiments conducted on the RITS-6 accelerator [1,2] demonstrated the potential of the SMP diode by meeting and exceeding the near term radiographic requirements established by AWE. During the demonstration experiments, RITS-6 was configured with a low-impedance (40 Ω) Magnetically Insulated Transmission Line (MITL), which provided a 75-ns, 180-kA, 7.5-MeV forward going electrical pulse to the diode. The use of a low-impedance MITL enabled greater power coupling to the SMP diode and thus allowed for increased radiation output. In addition to reconfiguring the driver (accelerator), geometric changes to the diode were also performed which allowed for an increase in dose production without sacrificing the time integrated spot characteristics. The combination of changes to both the pulsed power driver and the diode significantly increased the source x-ray intensity.

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Design of a high impedance MITL for RITS-3

Cited by 11 publications

References 2 publications

Design, Simulation, and Fault Analysis of a 6.5-MV LTD for Flash X-Ray Radiography

Design, Simulation, and Fault Analysis of a 6.5-MV LTD for Flash X-Ray Radiography

Characterization of the self magnetic pinch diode at high voltages for flash radiography.

Demonstration of the self-magnetic-pinch diode as an X-ray source for flash core-punch radiography.

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