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ASTM E1654-94(2021)
Standard Guide for Measuring Ionizing Radiation-Induced Spectral Changes in Optical Fibers and Cables for Use in Remote Raman FiberOptic Spectroscopy
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STANDARD published on 1.9.2021
The information about the standard:
Designation standards: ASTM E1654-94(2021)
Publication date standards: 1.9.2021
SKU: NS-1034909
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM E1654-94(2021) :
Keywords:
optical fibers, radiation damage, Raman spectroscopy, remote sensing,, ICS Number Code 33.180.10 (Fibres and cables)
Additional information
| Significance and Use | ||
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4.1?Ionizing environments will affect the performance of optical fibers/cables being used to transmit spectroscopic information from a remote location. Determination of the type and magnitude of the spectral variations or interferences produced by the ionizing radiation in the fiber, or both, is necessary for evaluating the performance of an optical fiber sensor system. 4.2?The results of the test can be utilized as a selection criteria for optical fibers used in optical fiber Raman spectroscopic sensor systems. Note 1:?The attenuation of optical fibers generally increases
when they are exposed to ionizing radiation. This is due primarily
to the trapping of radiolytic electrons and holes at defect sites
in the optical materials, that is, the formation of color centers.
The depopulation of these color centers by thermal or optical
(photobleaching) processes, or both, causes recovery, usually
resulting in a decrease in radiationinduced attenuation. Recovery
of the attenuation after irradiation depends on many variables,
including the temperature of the test sample, the composition of
the sample, the spectrum and type of radiation employed, the total
dose applied to the test sample, the light level used to measure
the attenuation, and the operating spectrum. Under some continuous
conditions, recovery is never complete.
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| 1. Scope | ||
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1.1?This guide covers the method for measuring the real time, in situ radiation-induced alterations to the Raman spectral signal transmitted by a multimode, step index, silica optical fiber. This guide specifically addresses steady-state ionizing radiation (that is, alpha, beta, gamma, protons, etc.) with appropriate changes in dosimetry, and shielding considerations, depending upon the irradiation source. 1.2?The test procedure given in this guide is not intended to test the other optical and non-optical components of an optical fiber-based Raman sensor system, but may be modified to test other components in a continuous irradiation environment. 1.3?The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||
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