Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 1/13 Mechanical engineering for GASPARD Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud Orsay cedex Tél. : Fax :

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 2/13 The environment of GASPARD CHYMENEAGATA Beam tube GASPARD Silicon detectors 3 layers Electronics Cooling Vacuum chamber mbar Supports Feed-throughs

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 3/13 AGATA+CHYMENE+GASPARD AGATA CHYMENE GASPARD Only 230mm radius

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 4/13 Trapezoidal shape updated Chymene target Silicon detectors Vacuum chamber Focal 135 mm Interface bellows

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 5/13 1 st layer 128x128 channels 2nd layer 32x16 channels 3rd layer 32x16 channels Top electronic board Cooling plate with 5mm inner tube (water at 5 liters/min) Detailed sector Cooling

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 6/13 The basic shape of the forward silicon detectors defined

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 7/13 Silicon detectors We need: -2/4 thin sides frame - Kapton read-out cables with on board electronics

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 8/13 IPACI 16 channels 2 W 2 capacitances 16 resistors 1 st layer connectors (128 channels) 2 nd and 3 rd layer connectors (32+32 channels) Side electronic board proposal Removed part for top board This could be on the kapton

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 9/13 Services=cables+cooling lines ? Annular detector

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 10/13 FORWARD 500mm mini BACKWARD 500mm mini Cable length and where are feedthrough panels ? No Barrel with Chymene

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 11/13 Number of channels: 1 st layer: 128 x 2 x 8 = 2048 channels 2 nd and 3 rd layer: 64*2*8*2 = 2048 channels Number of cables: Multiplexing (~/5) => 819 cables (differential?) If Kapton cables = 0.3*1mm²*819 Perimeter = 364 mm² => cable kapton layer ~1 mm thick Power from IPACI: 8 sectors x(12+10)x2.2W=387 W Cooling: Decrease the tube diameters, and gamma transparency (copper) Forward beam tube size problem Analysis of the forward readout

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 12/13 Efficiency optimization With a chamber not compatible for CHYMENE we can place barrel silicon detectors What happens if silicon don't focus the target ?

Rosier Ph. – IPNO – Detector Dpt. – 30/10/2012GASPARD Padova meeting 13/13 Conclusion A proposal of silicon trapezoidal detector exists  start to discuss with manufacturers for a prototype production in study about electronics, connection and integration to find a feasible design