LumiCal mechanical

1
LumiCal mechanical sensors design
Wojciech Wierba J.Blocki, E.Kielar, J.Kotula,
K.Oliwa, L.Zawiejski
FCAL Workshop, IFJ PAN Cracow, 06-07.05.2008
2
LumiCal inside ILD

• LumiCal can be mounted to special support fixed
  to the construction pipe.
• Cables and cooling water pipes can be feed out in
  the gap between TPC and ECal endcap.
• Space for connectors
• Access to connectors
• LumiCal has to be centered on the outgoing beam.

3
Gravity!
VXD ?
LumiCal 250 kg
LumiCal 250 kg
BeamCal 200 kg
BeamCal 200 kg
LHCal 1000 kg ?
LHCal 1000 kg ?
4
How to fix the LumiCal?

• x y initial positioning better than 0.5 mm
• z initial positioning better than 0.1 mm
• Temporary support for detector assembly on the
  beam pipe
• Fine x, y, z position adjustment

5
Mechanical design

• Two options
• Silicon sensors glued on both sides of every
  second tungsten plate
• Silicon sensors glued on one side of each
  tungsten plate
• Cooling system
• Water pipes going around half plate. Estimated
  water flow a few liters per minute (P mean 20
  W, ?t 0.1 ºC)

6
Space for sensors electronics
7
Sensor prototype

• Masks for prototypes have been ordered from
  Hamamatsu (2 months, 20 k)
• Sensors order depends on money (price from 900
  /40 pcs. order to 1400 /10 pcs. order per one
  tile)
• Dummy sensor ready

8
Fan out

• Traces on Kapton foil (50 µm)
• Double sided
• Trace 150 µm, space between 150 µm (can be
  smaller)
• Sensor pads will be glued with conductive glue to
  fan out traces

9
Summary Mechanical design

• Very challenging project for mechanical design.
• We have to choose between single sided and double
  sided version.
• Opening and closing the half barrels with
  accuracy better than 5 µm.
• Work in progress on precise adjustment of x, y, z
  and tilt position of LumiCal.
• Need detailed study on cooling.
• More information about construction tube.

10
Summary Sensor design

• Sensor prototypes will be ready by the end of
  this year.
• Fan out have to be tested (crosstalk, stray
  capacitance, conductive gluing, bonding on Kapton
  foil).
• Dummy sensor have to be equipped with
  capacitors and tested with fan out can be used
  for FE electronic tests.
• Test beam prototype - the design should start
  soon