Passive Mitigation of Load Debris in a Magnetically Insulated Transmission Line

Savage, M. E.; Pointon, T.D.; Seidel, D. B.; Mendel, C. W.; Wagoner, T. C.; Romero, D.; Wakeland, P.

doi:10.1109/ppc.2005.300659

Cited by 3 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[14] We are also continuing to analyze the data from simulations already completed. In particular, we want to understand why the distribution of electron loss is different in the Z and ZR convolutes.…”

Section: Summary and Future Plansmentioning

confidence: 99%

Computer simulations of the magnetically insulated transmission lines and post-hole convolute of ZR

Pointon

Langston

Savage

2007

2007 16th IEEE International Pulsed Power Conference

View full text Add to dashboard Cite

An important consideration for the success of the ZR project, refurbishing the Z accelerator at Sandia National Laboratories, is limiting current loss in the vacuum section, ideally to no worse than the 5 -10% seen on Z. The primary source for this loss is electrons flowing into the post-hole convolute from the four magnetically insulated transmission lines (MITLs). The MITLs on ZR have larger gaps to reduce the electron flow to values comparable to Z when operating at ~40% higher voltage and ~30% higher current.Electron flow in the vacuum section is analyzed with electromagnetic, particle-in-cell simulations, using two complementary simulation setups. First, the exact MITL profiles are modeled with high-resolution 2-D simulations out to large radius (typically r = 60 cm), providing accurate values for the electron flow into the convolute. Second, the convolute is modeled in 3-D, but with MITLs extending out only to r ~ 30 cm. The 3-D MITL geometry is modified to provide the same electron flow into the convolute as the 2-D simulations. The 3-D simulations have detailed diagnostics for current loss and surface deposition heating in the convolute.

show abstract

Section: Summary and Future Plansmentioning

confidence: 99%

Computer simulations of the magnetically insulated transmission lines and post-hole convolute of ZR

Pointon

Langston

Savage

2007

2007 16th IEEE International Pulsed Power Conference

View full text Add to dashboard Cite

show abstract

An Overview of Pulse Compression and Power Flow in the Upgraded Z Pulsed Power Driver

Savage

Bennett

Bliss

et al. 2007

2007 IEEE 34th International Conference on Plasma Science (ICOPS)

View full text Add to dashboard Cite

The Z pulsed power driver at Sandia National Laboratories is used to develop high energy density z-pinch x-ray sources for inertial confinement fusion research and radiation effects testing, and drive megabar pressures in material samples for equation of state studies. The pulsed power system is in the process of being replaced, improving reliability and increasing energy delivered to the load.The upgraded pulsed power system will deliver more than nine megajoules of forward wave energy in the first one hundred nanoseconds of its pulse. The system is comprised of thirty-six nominally identical modules, each producing a 3.3-terawatt pulse in 6Q water-insulated transmission lines. The peak forward-going voltage is about 5 MV. The pulse rise time is -75 ns; the full width at half maximum is -190 ns. The thirty-six modules are combined in parallel and drive twenty to twenty-five MA into the single load. In such a system, reliable insulation and precise switching are primary concerns. We will show key components of the system and results from a test module. We will also show performance results from the energy storage, triggering, and pulse-forming systems. We will also show the differing constraints of power flow from the 175 kA from each Marx generator, to currents in excess of 24 MA in the final feed to the load.

show abstract

An overview of pulse compression and power flow in the upgraded Z pulsed power driver

Savage

Bennett

Bliss

et al. 2007

2007 16th IEEE International Pulsed Power Conference

View full text Add to dashboard Cite

Passive Mitigation of Load Debris in a Magnetically Insulated Transmission Line

Cited by 3 publications

References 9 publications

Computer simulations of the magnetically insulated transmission lines and post-hole convolute of ZR

Computer simulations of the magnetically insulated transmission lines and post-hole convolute of ZR

An Overview of Pulse Compression and Power Flow in the Upgraded Z Pulsed Power Driver

An overview of pulse compression and power flow in the upgraded Z pulsed power driver

Contact Info

Product

Resources

About