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KFA10 Vacuum tank

KFA10 Vacuum tank. Status vacuum leak. Beam Transfer ( BT) line. The area subject of this intervention. KFA10. After repair still leaking & RGA. From Nicolas Thaus: Avant resserrage de la porte ( 180-200Nm ) le taux de fuite sous poche à saturation était de 5.6x10 -7 mbar.l /s

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KFA10 Vacuum tank

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  1. KFA10 Vacuum tank Status vacuum leak

  2. Beam Transfer (BT) line The area subject of this intervention KFA10 ALARA 3 committee for BI, BT line & 1L1 dismantling

  3. After repair still leaking & RGA • From Nicolas Thaus: • Avant resserrage de la porte (180-200Nm) le taux de fuite sous poche à saturation était de 5.6x10-7mbar.l/s • Après resserrage de la porte à 300Nm, nous sommes a 4.2x10-7mbar.l/s • La fuite la plus importante soit dans l’angle en haut à droite. Ce qui ne veux pas dire qu’il n’y ai pas de fuite plus petite autre part.

  4. After repair still leaking & RGA • From Nicolas Thaus, Leaks on the flanges: • 2 : 2x10-8 mbar.l/s • 3 : 7x10-10 mbar.l/s • 5 : 4x10-8 mbar.l/s • 8 : 6x10-10 mbar.l/s • 11: 5x10-9 mbar.l/s • 12: 2x10-9 mbar.l/s • Open Questions: • Leaks due to tank, cover, seal, or combination? • What is the best method of seal preparation?, remove oxide or just clean • Is ~220mm bolt spacing to large (~80mm theory) • ..

  5. Plan of action 11/01/2019 Dismantle Metrology ? (OK MME) Add 4 lifting holes cover? (OK MME) Add addition cover holes ? (4wks MME) Clean - New Ø100 seals ?, - 1st test with rubber seal ?, - New MME door seal (4 wks) ?, - How to prepare the seal?, - Close leaks with varnish?, - …….? Re-AssembleWith magnets Vacuum Test

  6. Inspection showed machining marks • Fixation of magnets tested on the doors • Circular seals have been re-polished Dismantle & Inspection Plan of action Metrology (19/01) Add 4 lifting holes cover? (OK MME) Add addition cover holes ? (4wks MME) Re-polish seal surfaces Clean - New Ø100 seals, Should arrive in week 10 - 1st test with rubber seal ?, - New MME door seal (4 wks) ?, - How to prepare the seal?, - Close leaks with varnish?, Re-AssembleWith magnets Vacuum Test

  7. 2018 2019 PSB Linear Schedule Baselinehttps://edms.cern.ch/document/1810496/2.0 2020 361 Ring Inj. Ejection POPS-B Tests BHP Alc. BAT BOR BCER BRF1 BRF2 Dismantling & Reinstallation Phase Request late installation, September 2019 Commissioning Phase PS Booster LS2 schedule - David Hay EN-ACE

  8. Spare slides

  9. KFA45 seal from MME

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