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Standard Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose in Radiation-Hardness Testing of Electronic Devices
NORMA vydaná dňa 1.7.2020
Označenie normy: ASTM E668-20
Dátum vydania normy: 1.7.2020
Kód tovaru: NS-1001418
Počet strán: 19
Približná hmotnosť: 57 g (0.13 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
absorbed dose, radiation-hardness testing, thermoluminescent dosimeter, TLD,, ICS Number Code 31.020 (Electronic components in general)
Significance 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.
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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 104 Gy (1 to 106 rad), and the range of absorbed dose rates is approximately from 10−2 to 1010 Gy/s (1 to 1012 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, (1.2 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.
1.3 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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