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Title: Fundamental science investigations to develop a 6-MV laser triggered gas switch for ZR: first annual report.

Abstract

In October 2005, an intensive three-year Laser Triggered Gas Switch (LTGS) development program was initiated to investigate and solve observed performance and reliability issues with the LTGS for ZR. The approach taken has been one of mission-focused research: to revisit and reassess the design, to establish a fundamental understanding of LTGS operation and failure modes, and to test evolving operational hypotheses. This effort is aimed toward deploying an initial switch for ZR in 2007, on supporting rolling upgrades to ZR as the technology can be developed, and to prepare with scientific understanding for the even higher voltage switches anticipated needed for future high-yield accelerators. The ZR LTGS was identified as a potential area of concern quite early, but since initial assessments performed on a simplified Switch Test Bed (STB) at 5 MV showed 300-shot lifetimes on multiple switch builds, this component was judged acceptable. When the Z{sub 20} engineering module was brought online in October 2003 frequent flashovers of the plastic switch envelope were observed at the increased stresses required to compensate for the programmatically increased ZR load inductance. As of October 2006, there have been 1423 Z{sub 20} shots assessing a variety of LTGS designs. Numerous incremental and fundamentalmore » switch design modifications have been investigated. As we continue to investigate the LTGS, the basic science of plastic surface tracking, laser triggering, cascade breakdown, and optics degradation remain high-priority mission-focused research topics. Significant progress has been made and, while the switch does not yet achieve design requirements, we are on the path to develop successively better switches for rolling upgrade improvements to ZR. This report summarizes the work performed in FY 2006 by the large team. A high-level summary is followed by detailed individual topical reports.« less

Authors:
; ; ;  [1];  [2];  [2]; ;  [3]; ;  [4];  [2];  [5]; ; ; ;  [6];  [7];  [8]; ;  [9] more »;  [10];  [11];  [12];  [13];  [14]; ; ; ;  [8];  [12]; ;  [10];  [15];  [15];  [15];  [16];  [17] « less
  1. (Voss Scientific, Albuquerque, NM)
  2. (Texas Tech University, Lubbock, TX)
  3. (University of Strathclyde, Glasgow, Scotland)
  4. (Voss Scientific, Albuquerque, NM)
  5. (University of Strathclyde, Glasgow, Scotland)
  6. (Voss Scientific, Albuquerque, NM)
  7. (University of Missouri-Columbia, Columbia, Missouri)
  8. (University of Missouri-Columbia, Columbia, Missouri)
  9. (Titan Pulse Sciences Division)
  10. (University of Strathclyde, Glasgow, Scotland)
  11. (University of Missouri-Columbia, Columbia, Missouri)
  12. (Ktech Corporation, Albuquerque, NM)
  13. (Titan Pulse Sciences Division)
  14. (Ktech Corporation, Albuquerque, NM)
  15. (Ktech Corporation, Albuquerque, NM)
  16. (Voss Scientific, Albuquerque, NM)
  17. (Texas Tech University, Lubbock, TX)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
901968
Report Number(s):
SAND2007-0217
TRN: US0702780
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BREAKDOWN; DESIGN; INDUCTANCE; LASERS; MODIFICATIONS; OPTICS; PERFORMANCE; PLASTICS; RELIABILITY; ROLLING; STRESSES; SWITCHES; Voltage regulators.; Z-pinch plasma; Triggers; Switches.; Erosion-Testing.; Pinch effect.; Breakdown-Electricity.

Citation Formats

Warne, Larry Kevin, Van Den Avyle, James A., Lehr, Jane Marie, Rose, David, Krompholz, Hermann G., Vela, Russell, Jorgenson, Roy Eberhardt, Timoshkin, Igor, Woodworth, Joseph Ray, Prestwich, Kenneth Randel, Krile, John, Given, Martin, McKee, G. Randall, Rosenthal, Stephen Edgar, Struve, Kenneth William, Welch, Dale Robert, Benwell, Andrew L., Kovaleski, Scott, LeChien, Keith, R., Johnson, David, Fouracre, R.A., Yeckel, Chris, Wakeland, Peter Eric, Miller, A. R., Hodge, Keith Conquest, Pasik, Michael Francis, Savage, Mark Edward, Maenchen, John Eric, Curry, Randy D., Feltz, Greg, Bliss, David Emery, MacGregor, Scott, Corley, J. P., Anaya, Victor, Wallace, Zachariah, Thoma, Carsten, and Neuber, Andreas.. Fundamental science investigations to develop a 6-MV laser triggered gas switch for ZR: first annual report.. United States: N. p., 2007. Web. doi:10.2172/901968.
Warne, Larry Kevin, Van Den Avyle, James A., Lehr, Jane Marie, Rose, David, Krompholz, Hermann G., Vela, Russell, Jorgenson, Roy Eberhardt, Timoshkin, Igor, Woodworth, Joseph Ray, Prestwich, Kenneth Randel, Krile, John, Given, Martin, McKee, G. Randall, Rosenthal, Stephen Edgar, Struve, Kenneth William, Welch, Dale Robert, Benwell, Andrew L., Kovaleski, Scott, LeChien, Keith, R., Johnson, David, Fouracre, R.A., Yeckel, Chris, Wakeland, Peter Eric, Miller, A. R., Hodge, Keith Conquest, Pasik, Michael Francis, Savage, Mark Edward, Maenchen, John Eric, Curry, Randy D., Feltz, Greg, Bliss, David Emery, MacGregor, Scott, Corley, J. P., Anaya, Victor, Wallace, Zachariah, Thoma, Carsten, & Neuber, Andreas.. Fundamental science investigations to develop a 6-MV laser triggered gas switch for ZR: first annual report.. United States. doi:10.2172/901968.
Warne, Larry Kevin, Van Den Avyle, James A., Lehr, Jane Marie, Rose, David, Krompholz, Hermann G., Vela, Russell, Jorgenson, Roy Eberhardt, Timoshkin, Igor, Woodworth, Joseph Ray, Prestwich, Kenneth Randel, Krile, John, Given, Martin, McKee, G. Randall, Rosenthal, Stephen Edgar, Struve, Kenneth William, Welch, Dale Robert, Benwell, Andrew L., Kovaleski, Scott, LeChien, Keith, R., Johnson, David, Fouracre, R.A., Yeckel, Chris, Wakeland, Peter Eric, Miller, A. R., Hodge, Keith Conquest, Pasik, Michael Francis, Savage, Mark Edward, Maenchen, John Eric, Curry, Randy D., Feltz, Greg, Bliss, David Emery, MacGregor, Scott, Corley, J. P., Anaya, Victor, Wallace, Zachariah, Thoma, Carsten, and Neuber, Andreas.. Thu . "Fundamental science investigations to develop a 6-MV laser triggered gas switch for ZR: first annual report.". United States. doi:10.2172/901968. https://www.osti.gov/servlets/purl/901968.
@article{osti_901968,
title = {Fundamental science investigations to develop a 6-MV laser triggered gas switch for ZR: first annual report.},
author = {Warne, Larry Kevin and Van Den Avyle, James A. and Lehr, Jane Marie and Rose, David and Krompholz, Hermann G. and Vela, Russell and Jorgenson, Roy Eberhardt and Timoshkin, Igor and Woodworth, Joseph Ray and Prestwich, Kenneth Randel and Krile, John and Given, Martin and McKee, G. Randall and Rosenthal, Stephen Edgar and Struve, Kenneth William and Welch, Dale Robert and Benwell, Andrew L. and Kovaleski, Scott and LeChien, Keith, R. and Johnson, David and Fouracre, R.A. and Yeckel, Chris and Wakeland, Peter Eric and Miller, A. R. and Hodge, Keith Conquest and Pasik, Michael Francis and Savage, Mark Edward and Maenchen, John Eric and Curry, Randy D. and Feltz, Greg and Bliss, David Emery and MacGregor, Scott and Corley, J. P. and Anaya, Victor and Wallace, Zachariah and Thoma, Carsten and Neuber, Andreas.},
abstractNote = {In October 2005, an intensive three-year Laser Triggered Gas Switch (LTGS) development program was initiated to investigate and solve observed performance and reliability issues with the LTGS for ZR. The approach taken has been one of mission-focused research: to revisit and reassess the design, to establish a fundamental understanding of LTGS operation and failure modes, and to test evolving operational hypotheses. This effort is aimed toward deploying an initial switch for ZR in 2007, on supporting rolling upgrades to ZR as the technology can be developed, and to prepare with scientific understanding for the even higher voltage switches anticipated needed for future high-yield accelerators. The ZR LTGS was identified as a potential area of concern quite early, but since initial assessments performed on a simplified Switch Test Bed (STB) at 5 MV showed 300-shot lifetimes on multiple switch builds, this component was judged acceptable. When the Z{sub 20} engineering module was brought online in October 2003 frequent flashovers of the plastic switch envelope were observed at the increased stresses required to compensate for the programmatically increased ZR load inductance. As of October 2006, there have been 1423 Z{sub 20} shots assessing a variety of LTGS designs. Numerous incremental and fundamental switch design modifications have been investigated. As we continue to investigate the LTGS, the basic science of plastic surface tracking, laser triggering, cascade breakdown, and optics degradation remain high-priority mission-focused research topics. Significant progress has been made and, while the switch does not yet achieve design requirements, we are on the path to develop successively better switches for rolling upgrade improvements to ZR. This report summarizes the work performed in FY 2006 by the large team. A high-level summary is followed by detailed individual topical reports.},
doi = {10.2172/901968},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}

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