HPS RD issues Krzysztof Piotrzkowski UCLouvainCERN Moving pipe

HPS: R&D issues Krzysztof Piotrzkowski (UCLouvain/CERN) Moving pipe Timing detectors Manchester meeting, 12 -14 December 2009

Moving Hamburg pipe concept Successfully used at HERA: Robust and simple design, + easy access to detectors Motorization and movement control to be cloned from LHC collimator design 14/12/2009 K. Piotrzkowski 2

Status of Hamburg moving beam pipe 1. Beam pipe • Machining Benoît FLORINS

Status of Hamburg moving beam pipe 1. Beam pipe • Electro-erosion

Moving pipe: Detector ‘pockets’ In preparation for 2009 (!) beam tests: Thin 300 mm entrance and side windows 14/12/2009 K. Piotrzkowski 5

Hamburg moving beam pipe prototype UCLouvain • Two pockets laser welded ready for test beam

HPS acceptance: Recent lessons • HPS 240 approach not too close to avoid shadowing • Dead edge should be minimized at HPS 240 • It favors short pockets • For HPS 240 one pocket design should become baseline • Length of Cerenkov detectors should be minimized Present CMS pixel detector provide good resolution for stage 1 14/12/2009 K. Piotrzkowski 7

Moving pipe R&D We need to start asap moving pipe design effort, coordinated by LHC/CERN groups: - Finalize pocket design - Design all integration aspects (vacuum, RF, etc) - Integrate collimator motorization solutions - Make safety and risk analysis - Prototyping: + UCLouvain got funding for making a full moving pipe prototype with HR: 30% mech. Engineer + CAD office + mechanical workshop + UERJ (Rio) might contribute to control software (motors) 14/12/2009 K. Piotrzkowski 8

Picosecond To. F detectors At nominal luminosity event rate so high @ FP 420 that accidental overlays (= interesting event in central detector + two protons from single diffraction) become major background! Use very fast To. F detectors to reduce it by matching z-vertex from central tracking with z-by-timing from proton arrival time difference: LHC vertex spread is ~50 mm to reduce significantly backgrounds one needs ~10 ps time resolutions ( 2 mm z-vertex resolution)! Developed very fast timing detectors: Cerenkov radiators + fastest MCP-PMTs Very challenging environment pushing MCP-PMT performances to the limits: High event rates, up to several MHz Running MCP-PMTs close to maximal anode currents Large annual total collected anode charges (~10 C/cm 2!) Gas. To. F: Gas (C 4 F 10) Cerenkov detector with very fast light pulse (< 1 ps!) resolution limited by TTS of MCP-PMTs and electronics Quartic: Quartz based Cerenkov with fine segmentation – multi-hit capability Going beyond requires new ideas: sub-picosecond streak cameras? ? 14/12/2009 K. Piotrzkowski 9

Gas. To. F: Cosmic-ray tests Resolution < 20 ps for 1 p. e. ! 14/12/2009 K. Piotrzkowski From Dec’ 08 10

Timing detectors R&D • Detector designs and prototyping well advanced (for stage 1) • MCP-PMT laser testing mature – good contacts with Photek; plans for lifetime measurements • Need to focus on fast electronics – should be part of pool of CMS upgrade projects: - reference precision clock long distance distribution (Jeff/LLNL+SLAC and Mike(and Brian)/FNAL) - fast CFD and TDC cards (UCLouvain/FNAL/? ? ? ) - DAQ for timing (? ? ? ) 14/12/2009 K. Piotrzkowski 11

Other? ? • BPM? ? • Alignment? ? 14/12/2009 K. Piotrzkowski 12

3 D sensors/detectors • 3 D R&D network well developed and expanding • Next year (2010) crucial for sensor testing at beams + first sensors with CMS pixel chips 14/12/2009 K. Piotrzkowski 13