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Radiation Length Distribution Aug 8, 2008 Maki Kurosawa RIKEN

Radiation Length Distribution Aug 8, 2008 Maki Kurosawa RIKEN. Modified Medium for Strip Layer (ROC3 ½ oz). Implementation of the realistic coolant material “NOVEC7000( H 3 C 4 OF 7 )”. Cu 17um (BIAS). Si 625um. Cu 17um x 2 (AGND + AVDD). Cu 17um (DGND). width 31.3mm. width 54.35mm.

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Radiation Length Distribution Aug 8, 2008 Maki Kurosawa RIKEN

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  1. Radiation Length Distribution Aug 8, 2008 Maki Kurosawa RIKEN

  2. Modified Medium for Strip Layer (ROC3 ½ oz) Implementation of the realistic coolant material “NOVEC7000(H3C4OF7)” Cu 17um (BIAS) Si 625um Cu 17um x 2 (AGND + AVDD) Cu 17um (DGND) width 31.3mm width 54.35mm width 72mm Coolant f 2mm H3C4OF7 G10 0.6mm (Insulator) omega piece 500um CF 500um (stave) total = 1.95 + 1.25*1.3 ~ 3.6 (%)

  3. Modified Medium for Pixel Layer Si 200um (Sensor) Before width 14mm G10 1.2mm (Passive) M55J 500um (Omega) Coolant (C5F12)f 2mm total = 0.83 (%) After M55J 150um (RC) M55J 380um (BUS) Si 150um (Sensor) width 15mm C 100um (Resin) M55J 500um (Omega) CF 380um (Stave) Coolant (H3C4OF7)f 2mm total = 1.03 (%)

  4. Present Material of Pixel Layer (7) Omega : M55J 500um Coolant : H3C4OF7 (6) Stave : Carbon Fiber 380um (5) Resin : C 100um (4) Sensor : Si 150um (3) ROC : M55J 100um (2) Resin : C 100um (1) BUS : M55J 380um

  5. Tilt Angle of Pixel Layer Present Previous tilt : 13.02 tilt : 7.0 tilt : 7.8 tilt : 13.0 28.715 26.676 14.585 13.587 UNIT : degree

  6. Radiation Length Distribution Layer 2 X/X0 ~ 1% Layer 1 X/X0 ~ 1% Layer 3 X/X0 ~ 3% Layer 3 X/X0 ~ 3% • CONDITION • -1.2 < h < 1.2 (FLAT) • 0.0 < f(degree) < 360 (FLAT)

  7. Radiation Length Distribution (ROC3 ½ oz) Radiation Length for VTX Radiation Length v.s. q Radiation Length v.s. f VTX X/X0 ~ 8% SVX Acceptance Radiation length of VTX was estimated to be 8%.

  8. Modified Medium for Strip Layer (ROC3 ¼ oz) Cu 8.5um (BIAS) Cu 8.5um (DGND) total = 1.83 + 1.25*1.3 ~ 3.5 (%)

  9. Radiation Length Distribution (ROC3 ¼ oz) Radiation Length for VTX Radiation Length v.s. q Radiation Length v.s. f VTX X/X0 ~ 8% SVX Acceptance Radiation length of VTX was estimated to be 8%.

  10. Summary • Change the radiation length of a thermal plate (23.9  26.6 cm). • Implement a realistic cooling medium (C5F12H3C4OF7) • Implement the realistic material of a pixel layer. • Modify tilt angle and an angular difference between adjacent ladders. • Radiation length of VTX was estimated to be 8%.

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