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The Roman Pots in the SPS

Crystal Collimation in Hadron Storage Rings CERN, 8 march 2005. The Roman Pots in the SPS. Marco Oriunno CERN, PH-TOT Department On behalf of the TOTEM Roman Pot Project group. Prototype 2004 installed in the SPS. The Layout.

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The Roman Pots in the SPS

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  1. Crystal Collimation in Hadron Storage Rings CERN, 8 march 2005 The Roman Pots in the SPS Marco Oriunno CERN, PH-TOT Department On behalf of the TOTEM Roman Pot Project group

  2. Prototype 2004 installed in the SPS

  3. The Layout • One Prototype of the Roman Pots has been installed and operated in the SPS during the 2004 runs, by the TOTEM collaboration • Installation in the sextant 5, sector 530 • Counting Room on surface in the blg.BB5 • Cables length ~ 80 meters • Access in to the tunnel through blg.BA5 • Roman pot vacuum chamber F80 mm • Reasons of the choice • …….easy access, short cable length, fitting with local vacuum aperture of the SPS Counting Room Access Point Roman Pot Location

  4. The underground area

  5. The infrastructures The Roman Pot have been removed after the SPS shutdown, they are available on surface and presently tested in the lab for RF measurements All the infrastructures are still in place : 4 cables for the control of the motors 2 multi-ribbons optical fibers for the readout of detectors 2 multi wires (48) cables for control of the cooling system 2 multi services cables for the Low Voltage and Bias Voltage Local Crates (CAEN) have been used in the tunnel for the LV and BV, remotely controlled via Internet Possibility to profit in addition of the cables left by the LHC collimator test, installed ~20 meters downstream.

  6. 3 cm Thin window 0.2 mm 10 cm The Pots

  7. Detectors assembly Silicon Microstrip detectors (10 planes) in secondary vacuum Operation temperature > -50oC Feedthrough of services from secondary vacuum to the atmosphere Quick Connections 9 cm

  8. In case of the utilization of the Roman Pot for an SPS test • Mechanical installation within 8 hour access, it is request to break the vacuum • For the motors control it is only need a crate and one PC on surface • The interlocks go through the motors cable, only a current generator box on surface is needed • Additional Beam Instrumentation reading (BLM, BPM) is available via the SPS Control Room • …….other infrastructures depend on the choice of the detector, the number of channels, the operational temperature required. • Please note that pots access the beam vertically, top and bottom • For an horizontal access: still possible in the SPS with minor modifications on to the lateral support plates of the Roman Pot • ……..verify with TOTEM the availability of the prototype 2004 for the next year

  9. A first idea for the discussion….. For angles of ~ 500mrad, particles stay in the vacuum chamber over 20 meters. Opportunity to detect them with the Roman Pot ± 40 mm No magnetic elements on the fly path An extra Roman Pot can be produced: ~ 30kchf and 3 months

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