Pinhole aperture point backlighter development experiments on Trident, 9-13, 2001

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Pinhole aperture point backlighter (PAPBL) imaging has been used on experiments on Omega, but results have been compromised by large backgrounds. This technique has advantages over traditional area backlighting/pinhole imaging, and the Omega experiments could benefit from this capability, but Omega time is expensive and not the place for developing diagnostic techniques if they can be developed on Trident instead. PAPBL, shot from Direct Drive Cylinder Mix experiments on Omega (DDCYLMIX 00-1, January 18 and 19, 2000). [See LA-UR-00-4187, Post-Shot Report, Direct Drive Cylinder Mix]. In this campaign, they used Trident to obtain clean PAPBL images. Having accomplished that, they ... continued below

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29 p.

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Lanier, N. E. (Nicholas E.) & Murphy, Thomas J. January 1, 2001.

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Description

Pinhole aperture point backlighter (PAPBL) imaging has been used on experiments on Omega, but results have been compromised by large backgrounds. This technique has advantages over traditional area backlighting/pinhole imaging, and the Omega experiments could benefit from this capability, but Omega time is expensive and not the place for developing diagnostic techniques if they can be developed on Trident instead. PAPBL, shot from Direct Drive Cylinder Mix experiments on Omega (DDCYLMIX 00-1, January 18 and 19, 2000). [See LA-UR-00-4187, Post-Shot Report, Direct Drive Cylinder Mix]. In this campaign, they used Trident to obtain clean PAPBL images. Having accomplished that, they attempted to replicate the noise environment of Omega by producing hot electrons and having them impinge on material to produce high-energy x-rays similar to those that might be produced by hot electrons impinging on diagnostics or target positioner components on Omega. Backlighter target design was based, to some degree, on that shown by Bullock et al. at the 42nd Annual APS-DPP Meeting in Quebec City, Quebec, Canada, October 23-27, 2000. [A.B. Bullock et al., Bull. Am. Phys. Soc. 45,(7) 359 (2000); A.B. Bullock et al., Rev. Sci. Instrum. 72, 690 (2001).] We accomplished this to some degree and then attempted, with some success, to obtain a good PAPBL image in the presence of this noise. Results of this work suggest methods that might reduce the background noise in Omega PAPBL images. The goals are to obtain a pinhole aperture point backlighter (PAPBL) image on Trident and develop a method to simulate the high-energy background contribution to PAPBL imnages seen on Omega experients in order to allow future experiments to optimize signal-to-noise in PAPBL imaging.

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29 p.

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  • Submitted to: American Physical Society/Div. of Plasma Physics 2001 meeting, Long Beach, CA, October 29-Nov. 6, 2001

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  • Report No.: LA-UR-01-4266
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975666
  • Archival Resource Key: ark:/67531/metadc926606

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  • January 1, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 6:50 p.m.

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Lanier, N. E. (Nicholas E.) & Murphy, Thomas J. Pinhole aperture point backlighter development experiments on Trident, 9-13, 2001, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc926606/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.