BS-ISO-23038-2006.pdf
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1、BRITISH STANDARD BS ISO 23038:2006 Space systems Space solar cells Electron and proton irradiation test methods ICS 49.140 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 23038:2006 This British Standard was published under the auth
2、ority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006 ISBN 0 580 48703 2 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 23038:2006. The UK participation in its preparation was entrusted by Technical Committee ACE/68, Space
3、systems and operations, to Subcommittee ACE/68/-/1, Space systems and operations Engineering Design production. A list of organizations represented on ACE/68/-/1 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. User
4、s are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Refere
5、nce number ISO 23038:2006(E) INTERNATIONAL STANDARD ISO 23038 First edition 2006-10-01 Space systems Space solar cells Electron and proton irradiation test methods Systmes spatiaux Cellules solaires spatiales Mthodes dessai dirradiation dlectrons et de protons BS ISO 23038:2006 Licensed Copy: sheffi
6、eldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of natio
7、nal standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Internati
8、onal organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rul
9、es given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at
10、least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 23038 was prepared by Technical Committee ISO/TC
11、20, Aircraft and space vehicles, Subcommittee SC 14, Space systems and operations. BS ISO 23038:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncont
12、rolled Copy, (c) BSI 1 Space systems Space solar cells Electron and proton irradiation test methods 1 Scope This International Standard specifies the requirements for electron and proton irradiation test methods of space solar cells. It addresses only test methods for performing electron and proton
13、irradiation of space solar cells and not the method for data analysis. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE Physical constants are given to four significant figures only and reflect current knowledge. 2.1 differential energy spect
14、rum spread of energies of some specific group NOTE In this document, this refers to the number of particles possessing an energy value that lies in the infinitesimal range E, E+dE divided by the size of the range (dE). Integration of the differential particle spectrum over all particle energies yiel
15、ds the total number of particles. This quantity is given in units of particles per unit area per unit energy. 2.2 electron e elementary particle of rest mass m = 9,109 1031 kg, having a negative charge of 1,602 1019 C 2.3 flux number of particles passing through a given area in a specified time NOTE
16、 Flux may also be specified in terms of the number of particles per unit time passing through a unit area from source directions occupying a unit solid angle. Typical units are particles per cm2 per second per steradian (sr) (1 sr is the solid angle subtended at the centre of a unit sphere by a unit
17、 area of the surface of the sphere). 2.4 fluence total number of particles per unit area in any given time period NOTE Fluence is also known as time-integrated flux. 2.5 integral energy spectrum total number of particles per unit area in a specified group that possess energies greater than, or equal
18、 to, a specified value 2.6 irradiation exposure of a substance to energetic particles that penetrate the material and have the potential to transfer energy to the material BS ISO 23038:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:49:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 2
19、.7 non-ionizing energy loss NIEL rate at which the incident particle transfers energy to the crystal lattice through non-ionizing events NOTE Typical unit is MeV cm2 g1. 2.8 omnidirectional flux number of particles of a particular type which have an isotropic distribution over 4 steradians and that
20、would traverse a test sphere of 1 cm2 cross-sectional area in 1 s NOTE Expressed in units of particles per cm2 per second. 2.9 proton p+ positively charged particle of mass number one, having a mass of 1,672 1027 kg and a charge equal in magnitude but of opposite sign to that of the electron NOTE A
21、proton is the nucleus of a hydrogen atom. 3 Symbols and abbreviated terms eV electronvolt NOTE A unit of energy commonly used for ions, electrons, elementary particles, etc. (1 eV 1,602 1019 J.) 4 Space radiation environments 4.1 Space radiation Primarily electrons and protons with a wide range of e
22、nergies characterize the space radiation environment. Gamma rays can be used as a substitute for electron irradiation with the proper transformation. Some reasonable electron and proton fluence limits usually attained in typical space conditions are given below. For 1 MeV electrons and 10 MeV proton
23、s, these typical but not inclusive fluence limits are 1015 and 1013 particles per cm2, respectively. Alpha particles and other charged particles are usually of negligible quantity as far as solar-cell damage is concerned. The particles come from the solar wind and are trapped by the Earths magnetic
24、field to form radiation belts with widely varying intensities 1. Solar wind is usually associated with particles of low energy (typically below 100 keV), whereas the particles of concern for solar cells are generally of higher energies. The inner portion of the belts consists mainly of protons and o
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