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Detector concept # Plenary introductory talk

Detector concept # Plenary introductory talk. IRENG07 Name September 17, 2007. Purpose of template. To suggest questions that will help focusing the talk and the following discussion on the goals of IRENG07 workshop A tentative questionnaire is suggested in the following slides

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Detector concept # Plenary introductory talk

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  1. Detector concept #Plenary introductory talk IRENG07 Name September 17, 2007 Global Design Effort

  2. Purpose of template • To suggest questions that will help focusing the talk and the following discussion on the goals of IRENG07 workshop • A tentative questionnaire is suggested in the following slides • Please try to embed answers to those questions into your talk • If some questions will be addressed not in the plenary introductory talk but in follow-up talks, please indicate so

  3. General parameters • Detector parameters • size • weight • field inside • field outside • range of acceptable L* • segmentation

  4. Assembly • How the on-surface assembly is performed and what are • surface space, volume, crane (tonnage, area coverage) requirements • How underground assembly is done • underground space, volume, crane (tonnage, area coverage) requirements • shaft size requirements

  5. Alignment • What are positioning accuracy needed for detector after it was moved to IP in push-pull operation • position, transverse to beam line, vertical, and along the beamline • rotational angles around three axis • what are internal to detector alignment adjustment systems that can cope with residual errors (there range and steps) • (related: or to cope with deformation due to magnetic field)

  6. Opening procedures • What is opening procedure • on beamline • off beamline • what are space requirements in ether case • Is the detector door split or not and why • What are requirements for time durations for various opening procedures • What are requirements for sizes of a detector supporting platform

  7. Final Doublet support • How the FD QD0 cryostat is supported • providing FD supporting surface, vibration stable, is detector responsibility – how you provide this • what space is provided for movers and any supporting structure or rails between 390mm OD of QD0 cryostat and detector • How devices in forward region are supported • including masks, LumiCal, BeamCal, etc • also in open or close position

  8. Inner detector beampipes • What is geometry & sizes of inner beampipes, from IP to start of Final Doublet • include information about material and thickness • what are connections (permanent, detachable) • what is installation and assembly • What is alignment accuracy needed for the internal beampipes and how it is achieved • e.g. when the FD will be moved by a mm, how vertex beampipe gets aligned

  9. Stability • How stability of FD supporting surface (which need to be stable to better than 50nm rms between pulses) is provided? • related: what are vibration sources connected to detector • what are sources which are near but not connected, to reduce vibrations • What rate of slow settlement (e.g. 100micron/month) could be tolerated? • What are temperature & humidity stability requirements, and what gradients are acceptable

  10. Radiation shielding • How radiation shielding of IR hall and another detector is provided when your detector is on beamline • (should satisfy the worst case: loss of full beam on thick target anywhere along the beamline) • How beamline is shielded and how the interference with FD support, cryogenics or detector moving is avoided

  11. Services & connections • What systems are connected to detector and travel with it and what are remote and fixed • E.g solenoid power supply • cryogenic system • dump resistors • electronic racks • Parameters of these systems • sizes, area, volume, vibrations, location • type of connections, cross sections • Voltage, current, rate of He production, power, cooling water flow, its T, stability

  12. Fire safety • How detector design is done to comply with fire safety, in particular, with those mandatory requirements • no flammable gas mixtures used underground • only the halogen-free cables can be used • smoke sensors with sufficient granularity installed inside the sub-detectors

  13. Mechanical structure • What is mechanical structure and rigidity of detector • What are deformations due to magnetic field and how they are mitigated

  14. Seismic safety • What are provisions for seismic events in detector design

  15. Other questions • Possibly, there are other questions to be answered • Also see the “Interface document” posted herehttp://www-conf.slac.stanford.edu/ireng07/agenda.htm

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