Two-color spatial and temporal temperature measurements using a streaked soft x-ray imager
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808 (United States)
- Directorate Science and Technology, AWE Aldermaston, Reading RG7 4PR (United Kingdom)
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
A dual-channel streaked soft x-ray imager has been designed and used on high energy-density physics experiments at the National Ignition Facility. This streaked imager creates two images of the same x-ray source using two slit apertures and a single shallow angle reflection from a nickel mirror. Thin filters are used to create narrow band pass images at 510 eV and 360 eV. When measuring a Planckian spectrum, the brightness ratio of the two images can be translated into a color-temperature, provided that the spectral sensitivity of the two images is well known. To reduce uncertainty and remove spectral features in the streak camera photocathode from this photon energy range, a thin 100 nm CsI on 50 nm Al streak camera photocathode was implemented. Provided that the spectral shape is well-known, then uncertainties on the spectral sensitivity limits the accuracy of the temperature measurement to approximately 4.5% at 100 eV.
- OSTI ID:
- 22596546
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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