Product Code:SAE ARP419
Title:Automatic Pilot Installations
Issuing Committee:A-4 Aircraft Instruments Committee
Scope:This Aeronautical Recommended Practice is intended to outline Automatic Pilot installation design, performance, and test recommendations for guide by the aircraft industry. These recommendations cover the mechanical and electrical installation and installation test procedures for automatic pilots of the type normally used in transport type aircraft. The material in this ARP does not supersede any airworthiness requirement in the Civil Air Regulations.【英文标准名称】:StandardPracticeforDosimetryinanElectronBeamFacilityforRadiationProcessingatEnergiesBetween80and300keV
【原文标准名称】:能量在80-300Kev的辐射加工用电子束设备的剂量测定的标准实施规程
【标准号】:ASTMISO/ASTM51818-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E10.01
【标准类型】:(ISO/ASTM)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorbeddose;dosimeter;dosimetrysystem;electronbeam;electronbeamaccelerator;ionizingradiation;radiationprocessing;radiationcrosslinking;radiationcuring;ICS
【摘要】:4.1Avarietyofirradiationortreatmentprocessesuselowenergyelectronprocessorstomodifyproductcharacteristics.Dosimetryrequirements,thenumberandfrequencyofmeasurements,andrecordkeepingrequirementswillvarydependingonthetypeandenduseoftheproductsbeingprocessed.Dosimetrymeasurementsareoftenusedinconjunctionwithphysical,chemical,orbiologicaltestingoftheproduct,tohelpverifyspecifictreatmentparameters.NOTE1-Inmanycasesreferencedatamaybedeveloped,comparingdosimetryresultswithotherquantitativeproducttesting;forexample,gelfraction,meltflow,modulus,molecularweightdistribution,orcureanalysistestscanbeusedtoestimateradiationdoseinspecificrelevantmaterials.4.2Radiationprocessingspecificationsusuallyincludeaminimumormaximumabsorbeddoselimit,orboth.Foragivenapplicationtheselimitsmaybesetbygovernmentregulationorbylimitsinherenttotheproductitself.4.3Criticalprocessparametersmustbecontrolledtoobtainreproducibledosedistributioninprocessedmaterials.Theelectronbeamenergy(ineVorkeV),beamcurrent(inmA),spatialdistributionofthebeam,andexposuretimeorprocesslinespeedallaffectabsorbeddose.NOTE2-Insomeliquid-to-solidpolymerizationapplications(oftenreferredtoasradiationcuring),theresidualoxygenlevelduringirradiationmustbecontrolledtoachieveconsistentresults.Ahighlevelofresidualoxygencanaffectproductperformanceinthesecuringapplications,butdoesnotaffecttheabsorbeddose.However,oxygeneffectsontheresponsefunctionofthedosimeterusedinthemeasurementofdoseshouldbetakenintoaccount.4.4Beforeanyradiationprocesssystemcanbeutilized,itmustbevalidatedtodetermineitseffectiveness.Thisinvolvestestingoftheprocessequipment,calibratingthemeasuringinstruments,anddemonstratingtheabilitytodeliverthedesireddosewithinthedesireddoserangeinareliableandreproduciblemanner.1.1Thispracticecoversdosimetricprocedurestobefollowedtodeterminetheperformanceoflowenergy(300keVorless)single-gapelectronbeamradiationprocessingfacilities.Otherpracticesandproceduresrelatedtofacilitycharacterization,productqualification,androutineprocessingarealsodiscussed.1.2Theelectronenergyrangecoveredinthispracticeisfrom80keVto300keV.Suchelectronbeamscanbegeneratedbysingle-gapself-containedthermalfilamentorplasmasourceaccelerators.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:英语