LNE 50 and LNE 51 beam lines Jose
LNE 50 and LNE 51 beam lines Jose A. Ferreira
Limit of responsibilities D I E S E L L N E 5 1 E L C V P U M A I T UPS PUMA CERN S H I E L D I N G + A C C E S S CERN Experimental area infrastructure, transfer line, assured power, related services and support Transport with crane and related electrical supply Collaboration Experiment including related vacuum connections Truck transport and related electrical supply NOTE: LNE 51 transfer line is «multi-purpose» line: can adapt to various experiments with 2 small optics position
Layout Valve between ELENA ring and LNE 50 Valve isolating LNE 51 from LNE 50 Valve interface between LNE 51 and PUMA >4 m to the trap Valve interface between LNE 50 and Gbar 6/6/2021 Document reference 3
Simplified geometry LNE 50 LNE 51 Space for future LNE 52 6/6/2021 Document reference 4
Assumptions Outgassing rate Results from lab measurements q Sector valves q q 10 -8 mbar∙l/s (Same value used in former simulations) q DN 160 all metal valve 3∙ 10 -9 mbar∙l/s (LNE 51 valves are DN 100) q General outgassing for pipes (old values) q 5∙ 10 -12 mbar∙l/s/cm 2 q 1. 2∙ 10 -11 mbar∙l/s/cm 2 EDMS 1490642 ELENA Work Package 2. 5: Vacuum 6/6/2021 Document reference 5
Results: Baseline 6/6/2021 Document reference 6
Results: Baseline 6/6/2021 Document reference 7
Results: VVS 6/6/2021 -9 3∙ 10 mbar∙l/s Document reference 8
Results: VVS 6/6/2021 -9 3∙ 10 mbar∙l/s Document reference 9
Layout Valve between ELENA ring and LNE 50 Valve isolating LNE 51 from LNE 50 Effect of NEG coating? Valve interface between LNE 51 and PUMA >4 m to the trap Valve interface between LNE 50 and Gbar 6/6/2021 Document reference 10
Results: Drifts NEG coated s=8 e-3 6/6/2021 Document reference 11
Results: Drifts NEG coated s=8 e-3 6/6/2021 Document reference 12
Simplified geometry LNE 50 LNE 51 Space for future LNE 52 6/6/2021 Document reference 13
Results: Effect of LNE 52 extraction 6/6/2021 Document reference 14
Results: Effect of LNE 52 extraction 6/6/2021 Document reference 15
Conclusions q The simulations show LNE 51 will have: ü Average pressure <2∙ 10 -10 mbar ü Pressure at the switchover point < 1∙ 10 -10 mbar The installation of LNE 52 doesn’t have any significant effect q NEG coatings on the two drift vacuum chambers q ü Average pressure <1∙ 10 -10 mbar ü Pressure at the switchover point < 5∙ 10 -11 mbar 6/6/2021 Document reference 16
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