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Description of ASTM-E668 2013ASTM E668 - 13Standard Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose in Radiation-Hardness Testing of Electronic DevicesActive Standard ASTM E668 | Developed by Subcommittee: E10.07 Book of Standards Volume: 12.02 ASTM E668Significance and Use 4.1 Absorbed dose in a material is an important parameter that can be correlated with radiation effects produced in electronic components and devices that are exposed to ionizing radiation. Reasonable estimates of this parameter can be calculated if knowledge of the source radiation field (that is, energy spectrum and particle fluence) is available. Sufficiently detailed information about the radiation field is generally not available. However, measurements of absorbed dose with passive dosimeters in a radiation test facility can provide information from which the absorbed dose in a material of interest can be inferred. Under certain prescribed conditions, TLDs are quite suitable for performing such measurements.
Note 2 For comprehensive discussions of various dosimetry methods applicable to the radiation types and energy
and absorbed dose-rate range discussed in this practice, see ICRU Reports 14 , 17 , 21 , and 34 .
1. Scope 1.1 This practice covers procedures for the use of thermoluminescence dosimeters (TLDs) to determine the absorbed dose in a material irradiated by ionizing radiation. Although some elements of the procedures have broader application, the specific area of concern is radiation-hardness testing of electronic devices. This practice is applicable to the measurement of absorbed dose in materials irradiated by gamma rays, X rays, and electrons of energies from 12 to 60 MeV. Specific energy limits are covered in appropriate sections describing specific applications of the procedures. The range of absorbed dose covered is approximately from 10 ?2 to 10 4 Gy (1 to 10 6 rad), and the range of absorbed dose rates is approximately from 10 ?2 to 10 10 Gy/s (1 to 10 12 rad/s). Absorbed dose and absorbed dose-rate measurements in materials subjected to neutron irradiation are not covered in this practice. (See Practice E2450 for guidance in mixed fields.) Further, the portion of these procedures that deal with electron irradiation are primarily intended for use in parts testing. Testing of devices as a part of more massive components such as electronics boards or boxes may require techniques outside the scope of this practice.
Note 1 The purpose of the upper and lower limits on the energy for electron irradiation is to approach a
limiting case where dosimetry is simplified. Specifically, the dosimetry methodology specified requires that the following three limiting conditions be approached: ( a ) energy loss of the primary electrons is small, ( b ) secondary electrons are
largely stopped within the dosimeter, and ( c ) bremsstrahlung radiation generated by the primary electrons is largely
lost.
1.2 This standard dose 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 and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards E170 Terminology Relating to Radiation Measurements and Dosimetry E666 Practice for Calculating Absorbed Dose From Gamma or X Radiation Keywords absorbed dose; radiation-hardness testing; thermoluminescent dosimeter; TLD; ICS Code ICS Number Code 31.020 (Electronic components in general) DOI: 10.1520/E0668-13 ASTM International is a member of CrossRef. ASTM E668The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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