Optical fiducial timing system for X-ray streak cameras with aluminum coated optical fiber ends

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866523

Nilson, David G ^[1]; Campbell, E Michael ^[2]; MacGowan, Brian J ^[3]; Medecki, Hector ^[3]

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1. Oakland, CA
2. Pleasanton, CA
3. Livermore, CA

An optical fiducial timing system is provided for use with interdependent groups of X-ray streak cameras (18). The aluminum coated (80) ends of optical fibers (78) are positioned with the photocathodes (20, 60, 70) of the X-ray streak cameras (18). The other ends of the optical fibers (78) are placed together in a bundled array (90). A fiducial optical signal (96), that is comprised of 2.omega. or 1.omega. laser light, after introduction to the bundled array (90), travels to the aluminum coated (82) optical fiber ends and ejects quantities of electrons (84) that are recorded on the data recording media (52) of the X-ray streak cameras (18). Since both 2.omega. and 1.omega. laser light can travel long distances in optical fiber with only a slight attenuation, the initial arial power density of the fiducial optical signal (96) is well below the damage threshold of the fused silica or other material that comprises the optical fibers (78, 90). Thus the fiducial timing system can be repeatably used over long durations of time.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States Department of Energy (Washington, DC)
• Patent Number(s): US 4730106
• OSTI ID: 866523
• Country of Publication: United States
• Language: English

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optical
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x-ray
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photocathodes
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60
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bundled
array
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comprised
omega
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recording media
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optical fibers
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aluminum coated
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fiducial timing
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