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Mechanical engineering for GASPARD

Mechanical engineering for GASPARD. The environment of GASPARD. CHYMENE. AGATA. Beam tube. GASPARD. Vacuum chamber 10 -6 mbar. Silicon detectors 3 layers. Electronics. Feed-throughs. Cooling. Supports. AGATA+CHYMENE+GASPARD. AGATA. CHYMENE. GASPARD Only 230mm radius.

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Mechanical engineering for GASPARD

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  1. Mechanical engineering for GASPARD Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud 1191406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr

  2. The environment of GASPARD CHYMENE AGATA Beam tube GASPARD Vacuum chamber 10-6 mbar Silicon detectors 3 layers Electronics Feed-throughs Cooling Supports

  3. AGATA+CHYMENE+GASPARD AGATA CHYMENE GASPARD Only 230mm radius

  4. Trapezoidal shape updated Chymene target Vacuum chamber Interface bellows Focal 135 mm Silicon detectors

  5. Detailed sector Cooling plate with 5mm inner tube (water at 5 liters/min) Top electronic board 3rd layer 32x16 channels 2nd layer 32x16 channels 1st layer 128x128 channels Cooling

  6. The basic shape of the forward silicon detectors defined

  7. Silicon detectors • We need: • 2/4 thin sides frame • Kapton read-out cables • with on board electronics

  8. Side electronic board proposal Removed part for top board IPACI 16 channels 2 W 2 capacitances 1st layer connectors (128 channels) 16 resistors 2nd and 3rd layer connectors (32+32 channels) This could be on the kapton

  9. Services=cables+cooling lines ? Annular detector

  10. Cable length and where are feedthrough panels ? BACKWARD 500mm mini FORWARD 500mm mini No Barrel with Chymene

  11. Analysis of the forward readout Number of channels: 1st layer: 128 x 2 x 8 = 2048 channels 2nd and 3rd 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

  12. Efficiency optimization With a chamber not compatible for CHYMENE we can place barrel silicon detectors What happens if silicon don't focus the target ?

  13. Conclusion • A proposal of silicon trapezoidal detector exists • start to discuss with manufacturers for a prototype production in 2013 • 2013-2014 • study about electronics, connection and integration to find a feasible design

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