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

2 IRENG07 Detector concept # 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 IRENG07 Detector concept # General parameters Detector parameters –size –weight –field inside –field outside –range of acceptable L* –segmentation

4 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # 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 IRENG07 Detector concept # Mechanical structure What is mechanical structure and rigidity of detector What are deformations due to magnetic field and how they are mitigated

14 IRENG07 Detector concept # Seismic safety What are provisions for seismic events in detector design

15 IRENG07 Detector concept # Other questions Possibly, there are other questions to be answered Also see the “Interface document” posted here