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Title: Requirements for self-magnetically insulated transmission lines

Abstract

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.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2]
+ Show Author Affiliations
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); VanDevender Enterprises, Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Office of Scientific and Technical Information, Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1213410
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Special Topics. Accelerators and Beams
Additional Journal Information:
Journal Volume: 18; Journal Issue: 3; Journal ID: ISSN 1098-4402
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

VanDevender, J. Pace, Pointon, Timothy D., Seidel, David B., Struve, Kenneth W., Jennings, Christopher, Oliver, Bryan V., and Schneider, Larry X. Requirements for self-magnetically insulated transmission lines. United States: N. p., 2015. Web. doi:10.1103/PhysRevSTAB.18.030401.
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VanDevender, J. Pace, Pointon, Timothy D., Seidel, David B., Struve, Kenneth W., Jennings, Christopher, Oliver, Bryan V., & Schneider, Larry X. Requirements for self-magnetically insulated transmission lines. United States. https://doi.org/10.1103/PhysRevSTAB.18.030401
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VanDevender, J. Pace, Pointon, Timothy D., Seidel, David B., Struve, Kenneth W., Jennings, Christopher, Oliver, Bryan V., and Schneider, Larry X. Sun . "Requirements for self-magnetically insulated transmission lines". United States. https://doi.org/10.1103/PhysRevSTAB.18.030401. https://www.osti.gov/servlets/purl/1213410.
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@article{osti_1213410,
title = {Requirements for self-magnetically insulated transmission lines},
author = {VanDevender, J. Pace and Pointon, Timothy D. and Seidel, David B. and Struve, Kenneth W. and Jennings, Christopher and Oliver, Bryan V. and Schneider, Larry X.},
abstractNote = {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.},
doi = {10.1103/PhysRevSTAB.18.030401},
journal = {Physical Review Special Topics. Accelerators and Beams},
number = 3,
volume = 18,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}
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https://doi.org/10.1103/PhysRevSTAB.18.030401
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