High-resolution imaging of early-time imprinting using normal-incidence multilayer mirrors. Final report

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A normal-incidence multilayer mirror telescope was designed, fabricated, and tested. The telescope consisted of a primary mirror and a secondary mirror in a Cassegrain optical configuration. The mirrors had multilayer coatings that efficiently reflected the soft x-ray radiation in a narrow bandpass centered at a wavelength of 48 {angstrom}. The telescope was taken to the Laboratory for Laser Energetics (LLE) on October 28, 1996. The telescope was mounted in a TIM instrument module on the OMEGA target chamber. The focusing and alignment of the mirrors were checked and optimized. Images were recorded on x-ray film on October 30. Images were ... continued below

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3 p.

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Seely, J.F. May 1, 1998.

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Description

A normal-incidence multilayer mirror telescope was designed, fabricated, and tested. The telescope consisted of a primary mirror and a secondary mirror in a Cassegrain optical configuration. The mirrors had multilayer coatings that efficiently reflected the soft x-ray radiation in a narrow bandpass centered at a wavelength of 48 {angstrom}. The telescope was taken to the Laboratory for Laser Energetics (LLE) on October 28, 1996. The telescope was mounted in a TIM instrument module on the OMEGA target chamber. The focusing and alignment of the mirrors were checked and optimized. Images were recorded on x-ray film on October 30. Images were recorded on a gated framing camera on October 31 and November 1. On each laser shot, hard x-ray images were recorded by a pinhole camera and a gated framing camera. The soft and hard x-ray images were returned to NRL for analysis. The images were digitized and compared. The major result of the study was that the soft x-ray emission from plasmas generated by 6 to 8 overlapping OMEGA beams is quite uniform, even for the case when beam smoothing techniques were not implemented. This implies that the soft x-ray emission can be used for backlighter applications and for the study of absorption by CH foils in the 48 {angstrom} wavelength region, at slightly longer wavelengths than the carbon K absorption edge where carbon is relatively transmissive. These backlighter techniques are now being implemented at LLE.

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3 p.

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INIS; OSTI as DE98004809

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  • Other Information: PBD: [1998]

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  • Other: DE98004809
  • Report No.: DOE/SF/21020--T1
  • Grant Number: AI03-96SF21020
  • DOI: 10.2172/595651 | External Link
  • Office of Scientific & Technical Information Report Number: 595651
  • Archival Resource Key: ark:/67531/metadc689887

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 17, 2015, 1:18 p.m.

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Seely, J.F. High-resolution imaging of early-time imprinting using normal-incidence multilayer mirrors. Final report, report, May 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc689887/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.