E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA The ANKA Vacuum System S.HermleA.Völker E.HuttelT.Fischböck

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA ANKA Parameter Energy0.5 – 2.5GeV Emittance50nm Circumference110.4m Current0.2 (0.4)A Loss per Turn0.6MeV Energy Accept B bend 0.3 – 1.5T Damping3, 3, 1.5ms In operation: 3 Beam lines for Micro fabrication 9 Analytical Beam lines In planning: 3

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA One of the Row BESSYANKASLSCLSASP First BeamApril 1998 Jan 2000 Dec. 2000Dec. 2003(2006) MaterialLN316 AbsorberLumped + Distributed Lumped PumpsTriodeDiode (Ti) Diode (Ti+Ta) Diode (Ti) BakingIn-situPre bake‘In–situ’ FlangesCF VAT Seal ManufacturerPINK, FMBFMB Ingmar Lehmann, FMB Lothar Schulz, SLS Erhard Huttel, ANKA

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Vacuum Chamber Lay Out

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Lay out, Continued Following chamber: e-beam chamber only Distributed Absorber Small pumps (150 l/s) every 1.5 m Large Chamber (Dipole plus following Quad /Sextupole ) e-beam Chamber plus Ante Chamber Each ante chamber: Lumped absorber (Covering 80% of SR) Large (500/300 l/s) pumps

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Pumping Standard Diode Ion pumps Varian 16 x 500 l/s 16 x 300 l/s 63 x 150 l/s 30 Controller 300 l/s l/s connected to 1 Contr. Up to l/sconnected to 1 Contr. Each pump current measured

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Vacuum Preparations and Assembling Specification:Leak rate < mbar l/s Desorption rate:< mbar l/ (s cm 2 ) Masses>40< 0.01 No Firing Baking and test at factory Baking and assembling on side (Pumps, gauges, absorber) Venting with N 2 Assembling in storage ring Pumping

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Production

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Expected Vacuum Behavior Distributed Absorber C.Herbeaux et al. Vac60(2001)113 Lumped Absorber V.V.Anashin et al. EPAC(1998) Ah 100 Ah Exposed: m Factor 10 difference for dose per length

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA What We Get (Logarithmic Scale) ! Prediction PAC98 Linear in Energy and Current SLS Saturation due to Touscheck

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA What Happened (Linear scale) ! Kr Accident SUL Wiggler Wera Undulator + Broken Window SCU14 50 Ah to recover, when ¼ of storage ring vented N Ah, when vented with air With more Valves now, 10 Ah to recover when venting straight section only

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Major Accident I (Kr Lamp 2002) (Standard diodes do not pump noble gases) Pumped Storage Ring with Turbo Pumps While baking all Pumps Recovered!! Not my design!! They did not tell us! Look for the BL design!! Syn.Rad. Kr lamp for baking behind Be – Mirror (Exposed to SR) Broke Conclusion: Standard Diodes or ok

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Major Accident II 2003 (Broken FE Window) Exposed SR to air H 2 O !, Not dry N 2 ! Cleaning with Syn.Rad. took 100 Ah to recover! Syn.Rad. Pyrex window in Diagnostic Front End Replaced after 3 Year of Use (became brown) New one broke after 6 month

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Instrumentation (Storage Ring) No Pirani, I do not miss them ! 12 Penning Gauges 4 QMS 95 Ion Pump Current Monitors

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Manufacturer ProductTypNo.Manuf.Cost € Chamber316 LN110.4 mFMB0.6 Millok Ion Pumps Controller 150 – 500 l/s Midivac 63/16/16 30 Varian0.4 Millok now ok Roughing Turbo 150 l/s6Varian0.05 Millok Gauges - Sector Valves Roughing 100 CF 63 CF 6 16 Cetec0.02 Millok (Schedule-) Gauges, QMS Leak Det. IKR70, PG300, QMS422 8Pfeiffer0.02 Millok

E.Huttel, Vacuum Workshop, ALBA, Sept.05 Forschungszentrum Karlsruhe / ANKA Conclusion EffectGain FiringReduces H 2 ? Pre bakeRemoves H 2 ONeeded ‘In situ’ bake outRemoves H 2 O better20 Ah Material: Desorption Conductivity Cost => better.η (Al) > η (SS) ~ η (Cu).λ (SS) < λ (Al) ~ λ (Cu) Cost (Cu) > Cost (Al) > Cost (SS) Steel best cost performance? unless you go to NEG coating Ti SublimatorAdditional pumping speed? Standard DiodesPumping speed 50 % higherYes NEG coatingRemoves H 2 CO200 Ah Only Lumped absorber Better conductance source to sink % better pressure