Vacuum sectorisation H Injection Some history Wim Weterings
- Slides: 8
Vacuum sectorisation H- Injection Some history Wim Weterings 19 -09 -2013
Recommendations and Outcome Review 2011 • Vacuum isolation – Possibility to isolate foils from PSB vacuum to avoid foil damage due to differential pressure. – Interlock to avoid venting of the PSB vacuum system before isolation of foil exchange unit.
Foil exchange unit - 2 Foil “retracted” “in beam” position Valve can now close to isolate system w e i v e R e Pr 09/11/2011 n g i s e D Min len imum gth r for equire retr d acti on Review on PSB 160 Me. V H - Injection 3
Space limitation - 1 Present. Situation Future Situation Blocking of the passage acceptable ? ~20 cm w e i v e R e Pr 09/11/2011 n g i s e D Review on PSB 160 Me. V H - Injection 4
Space limitation - 2 • Obstruction of the outside PSB passage. • Limited space for removal of complete foil mechanism. • Possibility to remove part of the wall to be discussed. ~20 cm Action 28: Investigate civil engineering for more space. ‘Impossible’, Supporting wall of main PSB cross beam and complete dismantling of region would be required for intervention. Very complicated and costly operation 20/03/2012 Follow-Up Review on PSB 160 Me. V H - Injection 5
Possible solution for integration of sector valves - 1 Vacuum Manifold w e i v e R Retractable Foil Exchange Mechanism Current Baseline Design e m o c t Ou or e f ce g th a sp kin d e loc r i qu is b sage e R em as t p sys n g i s e D Vacuum Manifold Ion Pump
Possible solution for integration of sector valves - 2 Series 48 Large body gate valves with pumping manifolds Fixed Foil Exchange Mechanism em t s sy he r fo g t e ac ckin p d s g blo age e uc din ass d p Re avoi Ion Pump Horizontal Option
Why re-sectorising this sector? At the moment the sector valves are foreseen to be positioned right before and right after the stripping foils; Foil Dump n o i t a t n e s e r p m Fro n e s n a H Jan A different sectorisation would allow: - Less radiation for TE/VSC during pumping and leak detection. - More space for installation of stripping foils. - Positioning of the sector valves away from a radioactive area; - Less problems to find space for pumping and venting. - A bigger sector might help in controlling the initial phase of the pump down and venting, preventing a sudden rupture of the graphite foils (experimental test are ongoing…) LIU - PSB Ho-H- Injection Meeting 8
