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Title: FOREX: a fiber-optics diagnostic system for study of materials at high temperatures and pressures

Abstract

We have successfully fielded a Fiber Optics Radiation Experiment system (FOREX) designed for measuring material properties at high temperatures and pressures in an underground nuclear test. The system collects light from radiating materials and transmits it through several hundred meters of optical fibers to a recording station consisting of a streak camera with film readout. The use of fiber optics provides a faster time response than can presently be obtained with equalized coaxial cables over comparable distances. Fibers also have significant cost and physical size advantages over coax cables. The streak camera achieves a much higher information density than an equivalent oscilloscope system, and it also serves as the light detector. The result is a wide bandwidth high capacity system that can be fielded at a relatively low cost in manpower, space, and materials. For this experiment, the streak camera had a 120 ns time window with a 1.2 ns time resolution. Dynamic range for the system was about 1000. Beam current statistical limitations were approximately 8% for a 0.3 ns wide data point at one decade above the threshold recording intensity.

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
5076261
Report Number(s):
UCRL-87284; CONF-820822-8
ON: DE82019437
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Conference: 26. technical symposium and exhibition of the International Society for Optical Engineering, San Diego, CA, USA, 21 Aug 1982
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 47 OTHER INSTRUMENTATION; NUCLEAR EXPLOSIONS; MATERIALS TESTING; OPTICAL EQUIPMENT; DESIGN; PERFORMANCE; UNDERGROUND EXPLOSIONS; CAMERAS; DATA TRANSMISSION; EXPERIMENTAL DATA; FIBER OPTICS; GEOLOGIC DEPOSITS; REMOTE SENSING; STREAK PHOTOGRAPHY; COMMUNICATIONS; DATA; EQUIPMENT; EXPLOSIONS; INFORMATION; NUMERICAL DATA; PHOTOGRAPHY; TESTING; 450200* - Military Technology, Weaponry, & National Defense- Nuclear Explosions & Explosives; 440300 - Miscellaneous Instruments- (-1989)

Citation Formats

Smith, D.E., and Roeske, F. FOREX: a fiber-optics diagnostic system for study of materials at high temperatures and pressures. United States: N. p., 1982. Web.
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Smith, D.E., & Roeske, F. FOREX: a fiber-optics diagnostic system for study of materials at high temperatures and pressures. United States.
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Smith, D.E., and Roeske, F. Thu . "FOREX: a fiber-optics diagnostic system for study of materials at high temperatures and pressures". United States. doi:.
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@article{osti_5076261,
title = {FOREX: a fiber-optics diagnostic system for study of materials at high temperatures and pressures},
author = {Smith, D.E. and Roeske, F.},
abstractNote = {We have successfully fielded a Fiber Optics Radiation Experiment system (FOREX) designed for measuring material properties at high temperatures and pressures in an underground nuclear test. The system collects light from radiating materials and transmits it through several hundred meters of optical fibers to a recording station consisting of a streak camera with film readout. The use of fiber optics provides a faster time response than can presently be obtained with equalized coaxial cables over comparable distances. Fibers also have significant cost and physical size advantages over coax cables. The streak camera achieves a much higher information density than an equivalent oscilloscope system, and it also serves as the light detector. The result is a wide bandwidth high capacity system that can be fielded at a relatively low cost in manpower, space, and materials. For this experiment, the streak camera had a 120 ns time window with a 1.2 ns time resolution. Dynamic range for the system was about 1000. Beam current statistical limitations were approximately 8% for a 0.3 ns wide data point at one decade above the threshold recording intensity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1982},
month = {Thu Jul 01 00:00:00 EDT 1982}
}
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