Precision timing and interlocks systems for FEL (free-electron laser) heating experiments on MTX (Microwave Tokamak Experiment)

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A new precision timing system has been installed on the Microwave Tokamak Experiment (MTX) at Lawrence Livermore National Laboratory (LLNL). The purpose of the system is to synchronize the tokamak's plasma discharge with a 140-GHz, 2-GW microwave pulse generated by a free-electron laser (FEL). The installation involved modifying the existing sequencer system and adding Digital delay generators, three in-house-designed CAMAC modules and other components. The system controls placement of the 30-ns FEL pulse during the MTX plasma discharge. It also provides precision triggers for the microwave plasma diagnostics. These triggers are distributed over 100-Mbit/s fiber-optic links. The MTX interlock system ... continued below

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Pages: (5 p)

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Petersen, D.E. (Lawrence Livermore National Lab., CA (USA)) September 20, 1989.

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Description

A new precision timing system has been installed on the Microwave Tokamak Experiment (MTX) at Lawrence Livermore National Laboratory (LLNL). The purpose of the system is to synchronize the tokamak's plasma discharge with a 140-GHz, 2-GW microwave pulse generated by a free-electron laser (FEL). The installation involved modifying the existing sequencer system and adding Digital delay generators, three in-house-designed CAMAC modules and other components. The system controls placement of the 30-ns FEL pulse during the MTX plasma discharge. It also provides precision triggers for the microwave plasma diagnostics. These triggers are distributed over 100-Mbit/s fiber-optic links. The MTX interlock system has been expanded to provide personnel safety during FEL experiments, to protect the FEL and related equipment, and to control the path of the FEL beam starting from the FEL's output, through the beam transport system, and into the tokamak. This paper describes how the existing MTX timing and interlocks systems were upgraded to accommodate these new FEL experiments. 4 refs., 4 figs.

Physical Description

Pages: (5 p)

Notes

NTIS, PC A02/MF A01; OSTI; INIS; GPO Dep.

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  • 13. international symposium on fusion engineering, Knoxville, TN (USA), 2-6 Oct 1989

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  • Other: DE90000833
  • Report No.: UCRL-101130
  • Report No.: CONF-891007--4
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 5636032
  • Archival Resource Key: ark:/67531/metadc1092190

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Office of Scientific & Technical Information Technical Reports

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 20, 1989

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 27, 2018, 3:23 p.m.

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Petersen, D.E. (Lawrence Livermore National Lab., CA (USA)). Precision timing and interlocks systems for FEL (free-electron laser) heating experiments on MTX (Microwave Tokamak Experiment), article, September 20, 1989; [Livermore,] California. (digital.library.unt.edu/ark:/67531/metadc1092190/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.