Pr

1
Arrangements of detectors on the active area of
the end cap (1/2) Squares, rectangles, lozenge of
300/350 mm or 400 mm size
Annotations F is the type number of frames / P
is for the PADS board
These are the same by symmetry
Lozenge arrangement
F3 P5
F1 P1
F10 P15
F8 P13
F2 P2
F2 P6
F2 P9
F9 P14
F2 P3
F2 P7
F5 P10
F7 P12
Mixture of squares and rectangles
F4 P8
F1 P4
F6 P11
These arrangements need too much different sorts
of frames and PADS boards, even if the right
drawing is the simplest
Page 1
2
Arrangements of detectors on the active area of
the end cap (2/2) Trapezoidal shapes assembled in
iris shape
Annotations Px is the type number of PADS
boards or frames
12 sectors (30 each) as super modules are
defined On each, 7 modules are fixed The sizes
of detectors are varying from 180 to 420 mm
P2
P3
P4
P1
P2
P3
P4
By rotation of 15 around the axe, these frames
are the same
These arrangement seems to be the best as only 4
different PADS are necessary
Page 2
3
Principle for a Super Module equipped with
detector 1
Carbon wheel with frames 20x100 mm
Detector 1 made of 8 mm of epoxy or sandwich
Frame of the super module made of 10 mm epoxy
reinforced with 15x40 mm carbon bar
Deformation limit acceptability to define Here
is 20 µm / mbar of pressure
Complete wheel with 12 super modules
Page 3
4
Principle for the 4 types of Pads plane
Pads plane type 2
Pads plane type 1
Pads plane type 3
Pads plane type 4
2 pads rows deleted due to the dead zone
Pads 6 x 2 mm 515000 pads on 12 super modules
approx. (correspond to one end plate)
Shape of the connectors 0.8 mm pitch 100 channels
each (85x6)

• Questions
• Do we let 5 mm of dead area on the detector,
  because then the pads plane is more reduced ?
• Are the pads aligned ? From where ? How is
  managed the radius parameter ?
• Connectors density is a crucial point as it
  drills a lot the detector (and also perimeter
  problem showed in next slide)

Page 4
5
Principle of the boundaries (electronics on the
pads plane ) Fixing and sealing of the detectors
Pads plane
The pads can go to the boundary but not the
electronic boards
Epoxy or sandwich detector
Frame of the super module Epoxy 10x16 carbon
15x40
Stud bolts
Electronic board
Some radiation lengths 1) Pads Epoxy detector
Epoxy/carbon Frame 6.4 2) Pads
Sandwich Carbon/Foam 9 mm Epoxy/Carbon frame
2.6 (Without electronics)
Stiffeners of the super module carbon 15x40
Page 5
6
Principle of the boundaries (electronics via
kapton cable) Fixing and sealing of the detectors
Pads plane
Epoxy or sandwich Carbon Foam detector 8 mm thick
Kapton cable
Cooling part
Frame of the super module Epoxy 10x16 mm
Electronic board 128 channels
Stud bolts
Some radiation lengths Pads Sandwich
Carbon/Foam 9 mm Epoxy/Carbon frame 2.6
(Without electronics)
Stiffeners of the super module carbon 15x40
Page 6