LumiCal mechanical & sensors design Wojciech Wierba J.Błocki, E.Kielar, J.Kotuła, K.Oliwa, L.Zawiejski FCAL Workshop, IFJ PAN Cracow,

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.

Gravity! VXD ? LumiCal ~250 kg LHCal ~1000 kg ? BeamCal ~200 kg

How to fix the LumiCal? x & y initial positioning better than 0.5 mm x & y initial positioning better than 0.5 mm z initial positioning better than 0.1 mm z initial positioning better than 0.1 mm Temporary support for detector assembly on the beam pipe Temporary support for detector assembly on the beam pipe Fine x, y, z position adjustment Fine x, y, z position adjustment

Mechanical design Two options 1.Silicon sensors glued on both sides of every second tungsten plate 2.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, Δt = 0.1 ºC)

Space for sensors & electronics

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

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

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

Summary – Sensor design Sensor prototypes will be ready by the end of this year. 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). 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. „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 Test beam prototype - the design should start soon