manufacturing of large uhv vessel

Manufacturing of Large UHV Vessel

Xavier Sauge and Sylvain Blanchard

SDMS, Saint-Romans, France

[email protected] 1° GEOMETRICAL SHAPE AND MAIN CHARACTERISTCS 2°ASSUMPTION AND CALCULATION RESULTS

- Calculation method by means of finite element analysis such as ANSYS 3° MATERIAL AND SURFACE PREPARATION 4° CONSTRUCTION METHOD

- Shop manufacture and site works 5° PERFORMANCES TO BE EXPECTED

- Expected outgassing rate 6° MAGNETIC PERMEABILITY 7° SIZE OPTIMISATION AND PRECAUTION 8° WELDING CONSIDERATIONS IN RESPECT WITH UHV CONDITIONS

International Workshop on Extreme High Vacuum Application and

Technology / SDMS / [email protected] /



SDMS SDMS Xavier SAUGEXavier SAUGE

Sylvain BLANCHARDSylvain BLANCHARD



Manufacturing Manufacturing of of large UHV large UHV vesselsvessels



PlanPlan

nn SDMS SDMS presentationpresentationnn General General informationsinformationsnn Achievements Achievements (ALCATEL, VIRGO)(ALCATEL, VIRGO)nn TritiumTritium--ββ spectrometerspectrometer



A A few few figuresfigures

nn FoundedFounded in 1962 in 1962 nn Located near Located near Grenoble (France)Grenoble (France)nn IssuedIssued capital 1 114 000 Euroscapital 1 114 000 Eurosnn TurnoverTurnover 2002 : 13 000 000 2002 : 13 000 000 EurosEuros

(50% (50% exportexport))nn WorkforceWorkforce : 100: 100



SDMSSDMS(19000 m(19000 m22))



Workshop J Workshop J (20 tons & (20 tons & controlledcontrolled atmatm.).)



Workshop Workshop CC(50 tons)(50 tons)



Workshop Workshop HH((clean clean room)room)



Quality Quality AssuranceAssurance

ISO 9001 since 2001by BVQI

ISO 9002 from 1992 to 2001 by AFAQ

Certified AD - HP0 by the TÜV Saarland (Germanstandards)



PlanPlan

nn SDMS SDMS presentationpresentation

nn GeneralGeneral informationsinformationsnn Achievements Achievements (ALCATEL, VIRGO)(ALCATEL, VIRGO)nn TritiumTritium--ββ spectrometerspectrometer



Process Process CleanlinessCleanliness

nn Not for an attractive Not for an attractive appearance appearance : to: to fulfilfulfil the the requirementsrequirementsnn Cleanliness during procurement Cleanliness during procurement and and manufacturingmanufacturingnn Qualified machining process Qualified machining process ((oilsoils))nn Materials cleaning Materials cleaning

(tests (tests and experienceand experience))–– degreasing degreasing / / rinsing rinsing / / alkaline alkaline solution / solution / rinsing rinsing / / Drying Drying / / BakeBake--

outoutnn Cleanliness Cleanliness

duringduring the the assemblyassembly -- clean clean roomsrooms -- handlinghandling withwith glovesgloves -- tools tools --strapsstraps......

nn ShipmentShipmentnn At each At each stage (contamination, scratch…) stage (contamination, scratch…)



Materials and surfacesMaterials and surfaces

nn Use of stainless steel X2CrNi 18Use of stainless steel X2CrNi 18--9 (1.43079 (1.4307-- 304L) or 304L) or X2CrNiMo 17X2CrNiMo 17--1212--2 (1.44042 (1.4404-- 316L) or 316L) or 1.4429 (X2CrNiMoN 171.4429 (X2CrNiMoN 17--1313--3) or 1.4406 (X2CrNiMoN 173) or 1.4406 (X2CrNiMoN 17--1111--2)2)

nn Mechanical polishing of plates in order to obtain a surface Mechanical polishing of plates in order to obtain a surface roughness value about 0.6 roughness value about 0.6 -- 0.80.8µµ (beginning)(beginning)

nn ElectropolishingElectropolishing of plates in order to obtain a final surface of plates in order to obtain a final surface roughness value about 0.2roughness value about 0.2µµ à 0.4à 0.4µµ

nn Cleaning (cleaning workshop)Cleaning (cleaning workshop)nn Baking at 400°C during 7 to 10 daysBaking at 400°C during 7 to 10 days



PerformancesPerformances

nn Leak Leak rate (< 10rate (< 10--1212 mbar l / s mbar l / s withwith RGA)RGA)nn OutgassingOutgassing

–– see see SDMSSDMS bookletbooklet «« Outgassing Outgassing -- Results and Economic Results and Economic ConsequencesConsequences -- SDMSSDMS »»

–– Materials Materials / / RoughnessRoughnessnn Magnetic permeabilityMagnetic permeabilitynn Dimensional requirementsDimensional requirements



PlanPlan

nn SDMS SDMS presentationpresentationnn General General informationsinformations

nn AchievementsAchievements(ALCATEL, VIRGO)(ALCATEL, VIRGO)

nn TritiumTritium--ββ spectrometerspectrometer



SDMS SDMS achievementsachievementsnn VIRGO UHV VIRGO UHV chambers chambers (UHV / (UHV / Outgassing Outgassing rate)rate)nn ALCATEL SPACE INDUSTRIES simulation ALCATEL SPACE INDUSTRIES simulation chamber chamber (dimensions)(dimensions)

– Manufacturing process (quality plan)– Dimensional requirements (flanges)– Gaskets (HELICOFLEX)– Outgassing (oven, procedure)– Helium tests, RGA– Pumping system



LAPPLAPP

nn VIRGO (18 tons)VIRGO (18 tons)nn Date : 05/98Date : 05/98nn 10 10 chamberschambers 20m20m33

nn GravitationalGravitational waveswavesmeasurementsmeasurements

nn UNS S30400 (304) UNS UNS S30400 (304) UNS S30403 (304L)S30403 (304L)



LAPP (idem)LAPP (idem)

nn 1010--1010 mbarmbarnn MecanicalMecanical andand inner inner

electropolishingelectropolishing



LAPP (idem)LAPP (idem)

nn HT 400°C (200 h)HT 400°C (200 h)nn OutgassingOutgassing rate rate

–– 1010--1414 mbar l / s . Cmmbar l / s . Cm22

nn On site :On site :–– BakeBake--out 150°Cout 150°C



Alcatel Alcatel Space Space IndustriesIndustries

nn 130m130m33 Simulation Simulation chamberchamber

nn 5m in 5m in diameterdiameternn HELIOS 1HELIOS 1nn Ra Ra 0.8µm0.8µm



Alcatel Alcatel Space Space IndustriesIndustries

nn ChamberChamber 450 m450 m33

nn Date : 12/97Date : 12/97nn UNS S30403 / 304L / UNS S30403 / 304L /

1.43071.4307nn Internal diameterInternal diameter : 6m: 6mnn Total Total LengthLength : 16m: 16mnn ThicknessThickness 15mm15mmnn HELIOS2 tests (HELIOS2 tests (launched by launched by

ARIANE5)ARIANE5)nn CleanClean roomroom classclass 100100



AlcatelAlcatel SpaceSpace(1/10th(1/10th scalescale model)model)



Flange Flange ((lowerlower))



Wall Wall plates on plates on jigjigprotected protected by plastic layerby plastic layer (class 100)(class 100)



Lower Lower part part (class 100 (class 100 insideinside))



Upper and Upper and middle partsmiddle parts



HandlingHandling



CranesCranes



ShipmentShipment



PlanPlan

nn SDMS SDMS presentationpresentationnn General General informationsinformationsnn Achievements Achievements (ALCATEL, VIRGO)(ALCATEL, VIRGO)

nn TritiumTritium--ββ spectrometerspectrometer



nn GEOMETRICAL SHAPE AND MAIN CHARACTERISTCSGEOMETRICAL SHAPE AND MAIN CHARACTERISTCSnn ASSUMPTION AND CALCULATION RESULTS ASSUMPTION AND CALCULATION RESULTS

–– Calculation method by means of finite element analysis such as ACalculation method by means of finite element analysis such as ANSYSNSYSnn MATERIAL AND SURFACE PREPARATIONMATERIAL AND SURFACE PREPARATIONnn CONSTRUCTION METHODCONSTRUCTION METHOD

–– Shop manufacture and site worksShop manufacture and site worksnn PERFORMANCES TO BE EXPECTEDPERFORMANCES TO BE EXPECTED

–– Expected Expected outgassingoutgassing rateratenn MAGNETIC PERMEABILITYMAGNETIC PERMEABILITYnn SIZE OPTIMISATION AND PRECAUTIONSIZE OPTIMISATION AND PRECAUTIONnn WELDING CONSIDERATIONS IN RESPECT WITH ULTRAWELDING CONSIDERATIONS IN RESPECT WITH ULTRA--VACUUM VACUUM

CONDITIONSCONDITIONS

TritiumTritium--ββ spectrometerspectrometer



General drawingGeneral drawing



Updated General DrawingUpdated General Drawing



DetailsDetails



Updated DetailsUpdated Details



Lower Lower partpart



Upper Upper partpart



SupportSupport



AssemblyAssembly



ResultsResultsnn CODAP / Working temperature at 400°CCODAP / Working temperature at 400°C

nn SHELL Ø7000 / 20 mmSHELL Ø7000 / 20 mmnn STIFFENING RINGS / 200 x 40 STIFFENING RINGS / 200 x 40 nn CONICAL SHELL / 20 mmCONICAL SHELL / 20 mmnn STIFFENING RINGS / 200 x 40 STIFFENING RINGS / 200 x 40 nn HEMIHEMI--HEADHEAD / 15 mm/ 15 mm

nn SHELL Ø1000 / 10 mmSHELL Ø1000 / 10 mm



Manufacturing processManufacturing process

nn Hot rolled plates (thickness >6mm)Hot rolled plates (thickness >6mm)nn Mechanical polishing (+ plastic layer)Mechanical polishing (+ plastic layer)nn Cutting / FormingCutting / Formingnn Assembly using a Assembly using a specific jigspecific jig ( the protective plastic layer is ( the protective plastic layer is

kept during manufacturing operations)kept during manufacturing operations)nn Nozzles DN1500, DN1000 and othersNozzles DN1500, DN1000 and othersnn Manufacture of a specific tool for site assembly worksManufacture of a specific tool for site assembly worksnn Transportation and assembly on site, tests and adjustmentsTransportation and assembly on site, tests and adjustments

–– WeldingWelding–– ElectropolishingElectropolishing–– Final cleaningFinal cleaning



Conclusions Conclusions

nn Outgassing Outgassing rate : 10rate : 10--1313 mbar.l.smbar.l.s--11.cm.cm--22 after several baking after several baking treatments at the temperature of 400°Ctreatments at the temperature of 400°C

nn Leak rate < 10Leak rate < 10--1212 mbar l / smbar l / snn Magnetic permeability : Magnetic permeability :

–– 1.4429 X2CrNiMoN 171.4429 X2CrNiMoN 17--1313--3 or 1.4406 X2CrNiMoN 173 or 1.4406 X2CrNiMoN 17--1111--22–– 1.4307 or 1.44041.4307 or 1.4404

nn AknowledgementsAknowledgements ::

–– SDMS staffSDMS staff–– VIRGO staff (Mr MUGNIER)VIRGO staff (Mr MUGNIER)



SDMSSDMSThank you Thank you for for your your

attentionattention

manufacturing of large uhv vessel

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