Rapid, Absolute Calibration of X-ray Filters Employed By Laser-Produced Plasma Diagnostics
The electron beam ion trap (EBIT) facility at the Lawrence Livermore National Laboratory is being used to absolutely calibrate the transmission efficiency of X-ray filters employed by diodes and spectrometers used to diagnose laser-produced plasmas. EBIT emits strong, discrete monoenergetic lines at appropriately chosen X-ray energies. X-rays are detected using the high-resolution EBIT calorimeter spectrometer (ECS), developed for LLNL at the NASA/Goddard Space Flight Center. X-ray filter transmission efficiency is determined by dividing the X-ray counts detected when the filter is in the line of sight by those detected when out of the line of sight. Verification of filter thickness can be completed in only a few hours, and absolute efficiencies can be calibrated in a single day over a broad range from about 0.1 to 15 keV. The EBIT calibration lab has been used to field diagnostics (e.g., the OZSPEC instrument) with fully calibrated X-ray filters at the OMEGA laser. Extensions to use the capability for calibrating filter transmission for the DANTE instrument on the National Ignition Facility are discussed.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 939465
- Report Number(s):
- LLNL-PROC-403860; TRN: US0806794
- Resource Relation:
- Journal Volume: 79; Journal Issue: 10; Conference: Presented at: 17th Topical Conference on High Temperature Plasma Diagnostics, Albuquerque, NM, United States, May 11 - May 15, 2008
- Country of Publication:
- United States
- Language:
- English
Similar Records
Laboratory Astrophysics, QED, and other Measurements using the EBIT Calorimeter Spectrometer at LLNL
Laboratory Astrophysics, QED, and other Measurements using the EBIT Calorimeter Spectrometer at LLNL