Transcript Template for Detector concept talk at IRENG07

Detector concept #
Plenary introductory talk
IRENG07
Name
September 17, 2007
Global Design Effort
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
IRENG07
Detector concept #
2
General parameters
• Detector parameters
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IRENG07
size
weight
field inside
field outside
range of acceptable L*
segmentation
Detector concept #
3
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
IRENG07
Detector concept #
4
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)
IRENG07
Detector concept #
5
Opening procedures
• What is opening procedure
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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
IRENG07
Detector concept #
6
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
IRENG07
Detector concept #
7
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
IRENG07
Detector concept #
8
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
IRENG07
Detector concept #
9
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
IRENG07
Detector concept #
10
Services & connections
• What systems are connected to detector and
travel with it and what are remote and fixed
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–
–
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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
IRENG07
Detector concept #
11
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
IRENG07
Detector concept #
12
Mechanical structure
• What is mechanical structure and rigidity of
detector
• What are deformations due to magnetic field
and how they are mitigated
IRENG07
Detector concept #
13
Seismic safety
• What are provisions for seismic events in
detector design
IRENG07
Detector concept #
14
Other questions
• Possibly, there are other questions to be
answered
• Also see the “Interface document” posted
here
http://www-conf.slac.stanford.edu/ireng07/agenda.htm
IRENG07
Detector concept #
15