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Open Access Publications from the University of California

Time-of-flight neutral particle analyzer and calibration

  • Author(s): Harris, WS
  • Garate, EP
  • Heidbrink, WW
  • McWilliams, R
  • Roche, T
  • Trask, E
  • Zhang, Y
  • et al.

Published Web Location Commons Attribution 4.0 International Public License

A time-of-flight diagnostic has been implemented on the Irvine field reversed configuration (IFRC) to obtain an energy distribution function from charge-exchanged neutral hydrogen. The diagnostic includes a 13 cm radius slotted disk rotating at 165 Hz in vacuum which chops the emitted neutrals at a rate of 26 kHz. In situ timing verification was performed with a dc xenon discharge lamp with an uncertainty less than 100 ns for a 38 μs chopping period. Energy calibration was accomplished with a singly ionized lithium source in the range of 300-1500 eV, achieving an average energy uncertainty, ΔEE, of 0.11. The diagnostic has measured neutrals in the range of 20-80 eV from the IFRC and the corresponding energy distribution function has been obtained. © 2008 American Institute of Physics.

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