electrical and grounding review for temperature profiler · electrical and grounding review for...

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Electrical and Grounding Review for Temperature Profiler Jelena Maricic. YujingSun, Radovan Milincic,Cary Kendziora, Stephen Pordes University of Hawaii & Fermilab September 26 th , 2017

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Page 1: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

ElectricalandGroundingReviewforTemperatureProfiler

JelenaMaricic.YujingSun,RadovanMilincic,CaryKendziora,StephenPordes

UniversityofHawaii&FermilabSeptember26th,2017

Page 2: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

HawaiiTemperatureProfiler• Highprecisionrelativetemp.measurementachievedbymovablearray,allowingcross-referencingoftemperaturesensorsin-situ.

LakeshoreRTDtemperaturesensorPT-102

FragilesensorcarefullyfastenedtoPCB

2PCBswithsensorsattachedto1mlongsegmentswith0.5mspacingbetweenthem

Entirearrayis7.5mhigh,spanning thefullheightofprotoDUNE LAr volume

Temperatureprofilermovesusingsteppermotor thatmovestherackandpiniongearsystemconnectedtorodassemblyupto1m.

• Immunetochangesfromlabtestingtoinstallation.

• Measurementtakenintwoeasystepswithentirearraymoveduptocomparereadingsfromtwosensorsateachlocationforcross-referencing.

• Expecttoachieverequiredtemp.measurementprecisionoffewmK.

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Page 3: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Electricschemeoverviewforsensorconnections

SensorShieldedCablewithtwotwistedwirepairsSensor leadssoldered towires.Eachleadsolderedtotwowires.

D-sub25connectorOntheflange

FlangewithfeedthroughConnectors.Flangeisgrounded, butwiresareinsulatedfromtheground.

Tmonitor

GroundedToslowcontrolrack

Slowmonitoring e-rack.

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Page 4: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

RTDsensorconnection• Systemislocatedbehindtheanodeplane• Fourwireconnectionforeachsensortoeliminatetheinfluenceofleadsandcontacts• Twotwistedpairsshieldedontheoutsidebyabraidedcable.• Sensorpinsandwireswillbesolderedoncommonpadsforconnection.• Sensorisheldinplacebytwowrap-aroundstainlesssteelloopstoprotectitfromvibrations.• TheFR4cutoutaroundthesensorallowsfreeflowofargon.

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Page 5: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

RTDcableRestrainingSystem

• CableissandwichedbetweenthePCBandstainlesssteelrodmount.• Sensorsolderingjointsaretensionfreeduringconstructionandinstallation.

• Fourscrewsholdtogethertwoboardsandcableinbetween,tomakeasandwich.

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FR4withRTD

Cable

StainlesssteelplatetosandwichAndsecurethecableandConnectittocarrierrod.

Connectionscrew.

Page 6: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

MountingtheRTDSensorFR4BoardtoCarrierRod

• RTDsensorFR4boardandtopstainlesssteelboardareattachedtothecarrierrodviastainlesskeythatrunsalongtheentirerodlength.• Itisattachedwithtwostainlesssteelscrews.

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StainlesskeytoattachsensorAssemblies.

Page 7: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Cablecomposition

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BraidedshieldisnotconnectedtotheflangeButfreelyfloats.

Page 8: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

MotorandcarrierrodInstallationandOverview

• Carrierrodhasamechanicalstopatthetopthatpreventsthecarrierrodfromslippinginsidethecryostat.

Oncethecarrierrodisinplace,itisconnectedtothedriveassemblybeingloweredonthetopofit.

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Page 9: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Viewupthesleeve• ThesleevehasadoublesidedCFflange.

• Spiderguideislocatedatthebottomofthesleeve.

• Spiderguideholdingfirmlythecarrierrodtoavoidanylateralmotion.

• DistancebetweenAPAandtemperaturemonitorflange20cm.

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Page 10: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Detailsofthespiderguide

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Page 11: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Contactbetweenthespiderguideandsleeve

• Portandsleevearefullyincontactandconnectedtoground.

• Spiderguideisweldedtothesleeve.

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Teflonslidebearing

Page 12: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Theguidingsleeve• Sleevefitsinsidetheportandtheyareincontactalongtheentirelengthandconnectedtothegroundofthecryostat.• Spiderguidealsostainlesssteelandweldedtothebottomofthesleeve.

Spiderguide– insulatedfromtherod bydesign.

TeflonslidebearingthatismadeofonlyPTFE,toisolateelectricallyfromthespider.

Spiderguide isconnectedtothesleeve.SleeveisincontactwithaportandCryostatandtheyareallgrounded.

Sleeve

Port

Cryostat

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Page 13: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

TheCarrierRodLocationwhereWherecarrierrodisconnectedtoground.

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Page 14: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Motorconnectiontoground

Motor isconnectedtotheground througharodatRackandpiniongearpointconnection.

Theenclosure isinsulatedfromthefloor, fromthemotorbodyandpipeenclosing thecarrierrod.

Theenclosureconnection totheground isthrough ferrofluidic sealandthehousing oftherackandpiniongear.

GreenrectanglesshowinsulationusingG10orFR4.

Ifnecessary,theenclosurecanbecompletelyinsulatedfromtheground.

Insulatedfromthefloor.

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Page 15: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

Driveassemblyselection• CaryhasselectedasteppermotorfromTecmatic andisintheprocessofcheckingallthespecstofitourneeds.

• ItisaDCmotorusing<48V.• Largenumberofstepsforfinepositioning.• Usesdoublewormgearforexcellentspeedcontrol(~0.3cm/s)• Itcanbecompletelypoweredoffwhennotinuse• Itusesabsoluteencoder– remembersabsolutepositionafterbeingturnedoffandonagain.

• Utilizesamechanicalbreakthatstaysonwhenthepowerisoff.• Canslidethesystemupanddownmanuallyincaseofmotorfailure• Mechanicalstopatthetopoftheassemblyrod,preventstherodfromslippingdowninsidethecryostat

• Manualcontrolincaseofmotorfailure.

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Page 16: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

FabricationandTestingPlan• Thetemperatureprofilerwillbefabricated,assembledandtestedinHawaiiandatFermilab.

ü ElectricconnectionsforallsensorswillbetestedaftersolderingpinsandwirestotheFR4boardbytakingtemperaturereadingsdirectlywithatemperaturemonitor.

ü SensorswillbeloweredinLN2alongwithacalibratedsensor.Temperaturereadingwillbetakenforbothsensorstotestwhethertheyareinagoodworkingconditionandforcrudecomparison.

ü Twistedpairsofwiresarecolorcodedandlabelswillbeplacedontheoutsideofthecablesonbothends,oncethesensorisattachedtocertainlocationonthecarrierrod.

ü LabelswilllooklikeRTD-1-750(themiddlenumberisthesensornumberbasedonlabtestingofthesensor,whilethelastnumberisthepositionofthesensoronthecarrierrod)

ü Carrierrodpieceswillbeassembledanddisassembled.

ü Driveassemblywillbetested,includingthemotorbreak,theencoder,manualdriveandoveralloperation.Thesystemwillbedrivenalargenumberoftimestocheckforslippageorothereffects.

ü Theentiresystemwillbeassembledandtestedinahighbayfacility.

• TheprofilerwillbeshippedtoProtoDUNE sitepartiallyassembled(roddisassembledinseveralpieceswithsensorsandcablesinplace,motorandelectronicenclosuredetached)

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Page 17: Electrical and Grounding Review for Temperature Profiler · Electrical and Grounding Review for Temperature Profiler Jelena Maricic. Yujing Sun, Radovan Milincic, Cary Kendziora,

InstallationandCommissioning

• WireswillbesolderedtotheD-subconnectorsontheflange.• Cableshieldingwillnotbeconnectedtotheflangeground.• Cableswithtwistedwireswillbesolderedontheuppersideoftheflangeandcableswillbelabeledattatpoint,aftereachsolderingoffourwires.• Sensorreadingwillbecheckedwiththetemp.monitorattherackafterwards,oneatthetime.• Multimeterwillbeusedtocheckthatthecableshieldingisproperlyinsulatedfromtheflangeandtheground.• Motorassemblywillbetested– firstindependentlyofthetemperatureprofiler(motoroperation,encoder,break).Then,itwillbeconnectedtothecarrierrodandtheentireassemblywillbedrivenupanddownthroughallowed1mrange.’• Sensorswillberetestedaftermotorinstallationandconnectiontocarrierrod.

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