VAC – CTRL SYS

8 Feb 2012

VAC : MSRC equipment

Number of new control stations

Name of vacuum equipment

Description

4 Cryotraps Each station includes the relevant cryotrap vacuum equipment (pumps, gauges, valves...) & cryogenics devices (essentially temperature and level signals readout + valve status)

0, TBC Links pumps New pumps on enlarged links, their sensors and the valves could be integrated in corresponding towers existing racks (NI, WI, PR, SR), in pace of removed pumps (TSP groups).

0, TBC LN2 tanks Readout of level and pressure inside the LN2 storage tanks, and related alarms. Normally a few signals, perhaps it could be integrated in the cryotraps control stations.

1, TBC Remote scroll It will control the operation of the remote scroll pumps. It should be simple, maybe easier to have a separated rack. Needs anyway interlocks between the different towers.

5, TBD Minitowers A rack for each minitower seems the easier solution. All the same. A ‘remote’ driving console to be discussed

2 300m tube stations To control a TSP pump group added at 300m along the tubes; should be very simple.

Tab.1: Summary of new vacuum systems and relevant control stations for AdV

Central area links, to be discussed

Ion

Ion

Ion

Tmp

Tmp

aux

Notes on central area vacuum changesIB tower: + a turbo group at beginning of MC pipe (move the valve? no)

DT cryotrap: updated cryotrap (new aperture size 200-250mm). Normally we shall integrate its new rack in the general control system.

IB Brewster: Brewster or cryotrap . to be discussed

Towers upper parts : + the possibility of install an Ion pump (For the control, could use the P33 drive)

Towers lower parts: 2 turbo pumps and 3 Ion groups, (plus a service pump for first evacuation and service, normally off, completed with gauge and valves.) These system could be grouped in a single rack (placed where?) or splitted in the relevant tower CC racks (in place of TSP drivers, tbc). The second choice seems better for the operator, give him a complete view of all the systems when in local mode.

Minitower: Separated by a glass window. Pumping system completed to get HV. The CC rack shall not be placed in the clean room, a solution should be found to allow the vacuum team operate the system from the clean room.Double orings .

Minitower pumps

PENDING ACTIONS

Ego, Genova, Nikhef

Prepare a draft layout of the phase separator layout (Nikhef) and cryogenic lines (Genova) . Ego will circulate a dxf of the central building relevant place with walls

Dec 2011

Ego will prepare the baking supplies for the 1st cryotrap July 2012 Ego deliver vacuum pumps for testing the first cryotrap (list attached) Feb-Mar

2012 Ego deliver the simplified control system for vacuum pumps of the first

cryotrap Feb-Mar

2012 Nikhef Purchase phase separator and related accessories for refill

LAL Preferred PLC for the main control station is the Bekhoff one

Nikhef Will provide the type of proposed Siemens PLC including its programming and external communications protocol

Nikhef release the document related to cryotrap PED classification A.Pasqualetti Circulate draft doc of vacuum items interlocks updated for the MSRC

choice https://workarea.ego-gw.it/ego2/virgo/advanced-virgo/vac/control-system/meeting-03may2011/Vac_CTRLSYS_01may.docx/

Nov 2011

Lal + Ego Lal: indicate the more critical board with respect to cooling req.ts, Ego: will check with thermocamera the effect of fans reduction

Dec 2011

Irene F. + Ego

Test of ‘hanged’ rack vs seismic effects. Complete the test of ‘silent’ fans

Feb-Mar 2012

About Crytrap, fix a date for meeting about:

Purchase of the 4 valves

Discuss the designed charriot for the Input traps installation

DN63 ports on 1300mm flanges

Metal seals for the prototype test

End cryotrap feet mechanical frequency result