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Roman Pot Status

Roman Pot Status. Review since the last Coll. Meet. Status of Production Production Planning (until pot #12) Tests/Commissioning in H8 and IP 5. Gennaro Ruggiero TOTEM Week Collaboration Meeting December‘08. Production Planning (I) .

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Roman Pot Status

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  1. Roman Pot Status • Review since the last Coll. Meet. • Status of Production • Production Planning (until pot #12) • Tests/Commissioning in H8 and IP 5 Gennaro Ruggiero TOTEM Week Collaboration Meeting December‘08

  2. Production Planning (I) • The construction of each Detector Package requires a sequence of operations which lasts more than 1.5 months . • This planning is meant to be “no earlier than ...” • During this sequence we also need services/technician which belong to other groups/experiments and the sharing of resources is not always obvious

  3. Production Planning (II) Definition of all the tests for the “pot” before going to the tunnel + finalisation of the DCS requirements Same production logic for all pots; critical part: hybrid construction “IP5 Installation” means: ready for IP5 Installation

  4. RP hybrids: actual status The construction of the RP hybrid is made of an alternated sequence of mounting and inspecting/testing steps. The failure at different steps is followed by further investigation and relocation of the hybrid to a rework slot. Production For what is available we should not have (major) problems in following the planning until Pot6 • Failures and Reworks: • Bottleneck of the production chain is the VFAT test • After failing tests only 8 VFATs replaced so far. The replacement of the VFAT has always turned in a positive test result >>> Not to forget:

  5. Beam test to Cosmic rays test setup in H8 • Detector package position swapped to the “cosmics position” • Detector package with the thin window inserted in a stainless steel (vacuum) vessel with thin plastic windows • Cosmics selection by 4 scintillators (2 top and 2 bottom of the package) • Low rates... Long data taking (test results shown by Valentina) • Moreover, presence in H8 needed all the time: • Low Voltage/High Voltage manual • Cooling/ Vacuum: manual control and online monitoring • Cooling plant operating Pot #3, Thermo-model and dummy heat load Pot #3 in cosmics position H8 cooling

  6. Point 5: RP cooling USC 55 • Cooling plant ready in USC 55 since months • Piping serving stations at 220m completed (both sides) • Piping serving stations at 147m will be completed in January ’09 • Controls, monitoring, warnings and alarms running on station (only) . C3F8 storage tank valves dummy load compressors PLC rack • First cooling liquid flowing in the 2 installed pots in October • Temperature/pressure data monitoring at the station with its own controls and in the Pot with the mini-dcs prepared by Vic’s group • Absence of a real DCS obliges presence in IP5 for all the duration of the test Plane 3 and 8 at -35°C (electronics OFF)

  7. Point 5: Commissioning of the RPs • Lately we had an “exercise” at point 5 for 3 days. The objective was to run the RPs ( cooling, low/high voltage, environmental sensors monitoring) and start the commissioning of the DAQ in IP5 (see Emilio’s talk as well). • Negative Points • This has required the presence in loco of about 11 people (also at same time...) • Very hard working conditions at the moment • Among other things, limited by shut-down programs in CMS and Tunnels of which we were not aware of. • No chances of redoing this exercise before end January 09 • Positive Points • Cooling plant Ok • Environ. monitoring cumbersome but OK • One scan on the pot 56 (readout via S-Link) • LV delivery seemed OK, but monitoring still • not fully understood • Good restaurant in Cessy...

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