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【英文标准名称】:StandardPracticeforQCMMeasurementofSpacecraftMolecularContaminationinSpace
【原文标准名称】:对太空中航天器分子污染进行QCM测量的标准实施规程
【标准号】:ASTME2311-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E21.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:contaminationmeasurement;molecularcontamination;outgassing;outgassingrates;quartzcrystalmicrobalance;spacecraftcontamination;temperaturecontrolledquartzcrystalmicrobalance
【摘要】:Spacecrafthaveconsistentlyhadtheproblemofcontaminationofthermalcontrolsurfacesfromline-of-sightwarmsurfacesonthevehicle,outgassingofmaterialsandsubsequentcondensationoncriticalsurfaces,suchassolararrays,movingmechanicalassemblies,cryogenicinsulationschemes,andelectricalcontacts,controljeteffects,andotherformsofexpellingmoleculesinavaporstream.Tothishasbeenaddedtheneedtoprotectopticalcomponents,eitheratambientorcryogenictemperatures,fromtheminutestdepositionofcontaminantsbecauseoftheirabsorptance,reflectanceorscatteringcharacteristics.Muchprogresshasbeenaccomplishedinthisarea,suchasthecarefultestingofeachmaterialforoutgassingcharacteristicsbeforethematerialisusedonthespacecraft(followingTestMethodsE595andE1559),butmeasurementandcontrolofcriticalsurfacesduringspaceflightstillcanaidinthedeterminationoflocationandbehaviorofoutgassingmaterials.1.1Thispracticeprovidesguidanceformakingdecisionsconcerningtheuseofaquartzcrystalmicrobalance(QCM)andathermoelectricallycooledquartzcrystalmicrobalance(TQCM)inspacewherecontaminationproblemsonspacecraftarelikelytoexist.Carefuladherencetothisdocumentshouldensureadequatemeasurementofcondensationofmolecularconstituentsthatarecommonlytermed"contamination"onspacecraftsurfaces.1.2Acorollarypurposeistoprovidechoicesamongtheflight-qualifiedQCMsnowexistingtomeetspecificneeds.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z04
【国际标准分类号】:71_040_99
【页数】:22P.;A4
【正文语种】: