Optical fiducial timing system for X-ray streak cameras with alu

Details Optical fiducial timing system for X-ray streak cameras with alu Optical fiducial timing system for X-ray streak cameras with alu

1986-12-04

1988-03-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

378 99, 350 9615, 350 9617, 350 9620, 313372, H01J 3150, H01J 4014

Patent

active

047301066

ABSTRACT:
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.

REFERENCES:
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patent: 4542290 (1985-09-01), Tan et al.
D. G. Nilson and B. J. MacGowan, "Green Light 2.omega. as an X-Ray Streak Camera Fiducial," Rev. Sci. Instrum. 57(8), 8/86, pp. 2187-2188.
D. G. Nilson and B. J. MacGowan, "Green Light 2.omega. as an X-Ray Streak Camera Fiducial," Abstract distributed, 3/86.
Graves et al., "Nova Optical Fiducial System", 1984 Laser Program Annual Report, Lawrence Livermore National Laboratory, 6/85, pp. 5-91 to 5-94.

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