HPS Motherboard Electronic Design 4 PCB 115 106

HPS Motherboard Electronic Design • 4 PCB (115, 106, 106 channels each). • For TOP LEFT board 115 channels we have: • 115 smd connectors (AMP 10 pin) for preamp very similar to previous version (pin slightly smaller). It is the same of FT-Cal motherboard. (next slide) • 15 TE signal connectors from 16 pin each, equal to previous version. (see page 3) • 2 HV connectors (15 pin) DSUB 750 V, 5 A, trough hole different to previous for a 1

AMP 10 pin smd connector 2

TE 16 pin connector 3

HPS Motherboard Design Block of 10 4

HPS Motherboard Design 115 top left 5

HPS Motherboard Layout Design • For Layout design we have, probably, 10 layers. (3 signals + 1 for High Voltage + 1 fan-out + 5 GND). • Layout specifications: • 115 signal traces with 50 Ohms impedance. • Signal: 0. 2 mm line width and 0. 2 mm min. spacing. • HV: 0. 6 mm line width and 0. 9 mm min. spacing. • Ground ring between two signals as FT-Cal project. 6

Some Questions 1. 1)We assume preamp connection is the same of FT-Cal. Is it true? 2)Preamp positioning. Where is located the HV pin respects yours picture? Last pin of right? Is the same for top and bottom part? 3)Thickness between 3 or 4 mm for you. I think a 2. 5 mm. Any problems? 4)Link the tin ground around the preamps holes to an internal ground layer with a via. Is it necessary? 5)You want put a tin ground without solder (circular area diameter 10 mm) around each fixing hole. 7 Why?