AdV Vacuum system changes, 04Mar2010, NDRC option Preliminary Cryotrap_NI Link or tube? Cryotrap_NE Link Cryopump SR? Cryopump PR? Zeolites/27K/77K (or 3 x pumps 4K 2Hz?) Remote_scroll 300mN Ions: DT or SR? Ions: IB or PR? Ions: MC pipe near MC tower Ions: near NI DN651 Warm=Narm DN400? _ SR, PR permanently connected to BS _ 5 ions groups to be used during data taking. Positioned near IB,DT,MC,NI,WI or PR,SR? Depend on link geometry...(5000l/s nominal) _PR suspension to be dismounted, viroles used for IB/DT (and filters also?) _ bench towers height /gas load shall increase, air too. 27K traps? Or just turbos? 77K traps? Installed on a 1000mm port, with a 500mm valve. _Two large new turbos fixed on ground floor near PR/SR to be used during commissioning (4000l/s) Turbo2_SR Turbo2_PR DN651 DN1000

Cryotraps 1of2, preliminary 2 systems like this one per each trap Manual valve CF with position indicator 2 gauges to be purchased, normally same to the ones we have, but not necessarily manual valve with position indicator Large valve / tower link Turbo, to be purchased, normally with controller on board, rs232 necessary to visualize parameters Automatic valve with position indicator 2 gauges Automatic valve with position indicator Local scroll and also remote scroll? Automatic valve with position indicator existing large valve, to be linked to the control PE RGA PI PE 2 TSP fil. sets Manual valve with position indicator New or from 0m/3000m? Not from NI/NE... vent Manual valve with position indicator

Cryotraps 2of2, preliminary. Cryogenic controls, pid for level control and external tank Electronics driver to be read (tbc) by remote, normally with a few low level output or rs232 or other Automatic proportional valve, with position indication (profibus...) Automatic valve to be linked to the temp control existing large valve, to be linked to the temp control Level 1 External Tank LN2 Electronics driver to be read by remote, normally with a few low level output or rs232 or other Level 2 PID PID level regulator to be read by remote, normally with a few low level output or rs232 or other. Could retransmit the level and valve status Temperature Some temp readouts to be acquired. The controller will have relays to close also valves in case of high temp alarms Pressure 1 Pressure 2 Pressure signals (2), normally 4-20mA, to be recorded Comments: add readouts of LN2 tanks pressures