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Fournier KB, Brown CG, Yeoman MF, Fisher JH, Seiler SW, Hinshelwood D, Compton S, Holdener FR, Kemp GE, Newlander CD, Gilliam RP, Froula N, Lilly M, Davis JF, Lerch MA, Blue BE. X-ray transport and radiation response assessment (XTRRA) experiments at the National Ignition Facility. Rev Sci Instrum 2016; 87:11D421. [PMID: 27910608 DOI: 10.1063/1.4960501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Our team has developed an experimental platform to evaluate the x-ray-generated stress and impulse in materials. Experimental activities include x-ray source development, design of the sample mounting hardware and sensors interfaced to the National Ignition Facility's diagnostics insertion system, and system integration into the facility. This paper focuses on the X-ray Transport and Radiation Response Assessment (XTRRA) test cassettes built for these experiments. The test cassette is designed to position six samples at three predetermined distances from the source, each known to within ±1% accuracy. Built-in calorimeters give in situ measurements of the x-ray environment along the sample lines of sight. The measured accuracy of sample responses as well as planned modifications to the XTRRA cassette is discussed.
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Affiliation(s)
- K B Fournier
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
| | - C G Brown
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
| | - M F Yeoman
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
| | - J H Fisher
- Fifth Gait Technologies, Inc., 14040 Camden Circle, Huntsville, Alabama 35803, USA
| | - S W Seiler
- Defense Threat Reduction Agency, 8725 John J. Kingman Road, Fort Belvoir, Virginia 22060-6201, USA
| | - D Hinshelwood
- Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, DC 20375, USA
| | - S Compton
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
| | - F R Holdener
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
| | - G E Kemp
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
| | - C D Newlander
- Fifth Gait Technologies, Inc., 14040 Camden Circle, Huntsville, Alabama 35803, USA
| | - R P Gilliam
- Fifth Gait Technologies, Inc., 14040 Camden Circle, Huntsville, Alabama 35803, USA
| | - N Froula
- Fifth Gait Technologies, Inc., 14040 Camden Circle, Huntsville, Alabama 35803, USA
| | - M Lilly
- Dynasen, Inc., 20 Arnold Pl., Goleta, California 93117, USA
| | - J F Davis
- Defense Threat Reduction Agency, 8725 John J. Kingman Road, Fort Belvoir, Virginia 22060-6201, USA
| | - Maj A Lerch
- Defense Threat Reduction Agency, 8725 John J. Kingman Road, Fort Belvoir, Virginia 22060-6201, USA
| | - B E Blue
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
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Fisher JH, Newlander CD, Horton R, Fournier KB, Emig J, Patterson R, Davis JF, Seiler S, Jenkins PP. Radiochromic film measurement of spatial uniformity for a laser generated x-ray environment. Rev Sci Instrum 2012; 83:10E137. [PMID: 23126958 DOI: 10.1063/1.4746811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
An existing x-ray source application (XRSA) test cassette was modified to hold multiple x-ray filter materials followed by two radiochromic film types (FWT-60 and HD-810 Gafchromic® film) to qualitatively characterize the spectral-spatial uniformity over the XRSA sample field of view. Multiple sets of film were examined and nominal set was determined. These initial, qualitative measurements suggest a low-energy regime (E < 3 keV) spatial anisotropy and spatial isotropy at higher energies (E > 3 keV).
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Affiliation(s)
- J H Fisher
- Fifth Gait Technologies, Inc., Huntsville, Alabama 35803, USA.
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Fournier KB, Rekow V, Emig J, Fisher JH, Newlander CD, Horton R, Davis J. The x-ray source application test cassette for radiation exposures at the OMEGA laser. Rev Sci Instrum 2012; 83:10E136. [PMID: 23126957 DOI: 10.1063/1.4734036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We have designed a sample cassette that can be used to position up to six samples in the OMEGA laser chamber. The cassette accommodates round samples up to 38.1 mm (1.5(")) in diameter and square samples up to 27 mm on a side, any of which can be up to 12.7 mm thick. Smaller specimens are centered with spacers. The test cassette allows each sample to have a unique filter scheme, with multiple filter regions in front of each sample. This paper will present mechanical design considerations and operational aspects of the x-ray source application cassette.
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Affiliation(s)
- K B Fournier
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
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Fournier KB, Celeste J, Rekow V, Bopp DR, May MJ, Fisher JH, Horton R, Newlander CD, Jenkins P, Trautz K. A test cassette for x-ray-exposure experiments at the National Ignition Facility. Rev Sci Instrum 2010; 81:075113. [PMID: 20687765 DOI: 10.1063/1.3470684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present the design and operation of a test cassette for exposure of samples to radiation environments at the National Ignition Facility. The cassette provides options for square and round samples and exposure areas; the cassette provides for multiple levels of filtration on a single sample, which allows dynamic range in experiments. The samples had normal lines of sight to the x-ray source in order to have uniform x-ray illumination. The incident x-radiation onto the samples was determined by the choice of filter thicknesses and materials. The samples were held at precise locations, accurate to within a few hundred microns, in the target chamber in order to have a known fluence incident. In the cassette, the samples were held in place in such a way that a minimal "line contact" allows them to have the maximal mechanical response to the x-ray load. We present postshot images of the debris found on films used for filters, and pre- and postexposure specimens.
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Affiliation(s)
- K B Fournier
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
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