Requirements for self-magnetically insulated transmission lines

VanDevender, J. Pace; Pointon, Timothy D.; Seidel, David B.; Struve, Kenneth W.; Jennings, Christopher; Oliver, Bryan V.; Schneider, Larry X.

doi:10.1103/PhysRevSTAB.18.030401

Requirements for self-magnetically insulated transmission lines

Journal Article · Sat Feb 28 23:00:00 EST 2015 · Physical Review Special Topics. Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevSTAB.18.030401· OSTI ID:1213410

VanDevender, J. Pace ^[1]; Pointon, Timothy D. ^[2]; Seidel, David B. ^[2]; Struve, Kenneth W. ^[2]; Jennings, Christopher ^[2]; Oliver, Bryan V. ^[2]; Schneider, Larry X. ^[2]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); VanDevender Enterprises, Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Self-magnetically insulated transmission lines (MITLs) connect pulsed-power drivers with a load. Although the technology was originally developed in the 1970s and is widely used today in super power generators, failure of the technology is the principal limitation on the power that can be delivered to an experiment. We address issues that are often overlooked, rejected after inadequate simulations, or covered by overly conservative assumptions: (i) electron retrapping in coupling MITLs to loads, (ii) the applicability of collisionless versus collisional electron flow, (iii) power transport efficiency as a function of the geometry at the beginning of the MITL, (iv) gap closure and when gap closure can be neglected, and (v) the role of negative ions in causing anode plasmas and enhancing current losses. We suggest a practical set of conservative design requirements for self-magnetically insulated electron flow based on the results discussed in this paper and on previously published results. The requirements are not necessarily severe constraints in all MITL applications; however, each of the 18 suggested requirements should be examined in the design of a MITL and in the investigation of excessive losses.

View Accepted Manuscript (DOE)

Research Organization:: Office of Scientific and Technical Information, Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1213410

Journal Information:: Physical Review Special Topics. Accelerators and Beams, Journal Name: Physical Review Special Topics. Accelerators and Beams Journal Issue: 3 Vol. 18; ISSN PRABFM; ISSN 1098-4402

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Particle-in-cell simulations of cathode plasma evolution in small-gap magnetically insulated transmission lines Luo, Wei; Zhang, Jianwei; Li, Yongdong Journal of Applied Physics, Vol. 126, Issue 24 https://doi.org/10.1063/1.5115800	journal	December 2019
Particle-in-cell simulations of current loss in magnetically insulated transmission line with inductive helical support Luo, Wei; Li, Yongdong; Wang, Hongguang Unpublished https://doi.org/10.13140/rg.2.2.11710.64321	text	January 2019
Theoretical model for magnetically insulated flow with both negative and positive ions Luo, Wei; Qiang, Lanpeng; Zhang, Jianwei Unpublished https://doi.org/10.13140/rg.2.2.20099.25126	text	January 2019

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