Transcript Slide 1
CMS LHC strip readout system APV APVMUX analog opto-hybrid lasers CMS FED (9U VME) ~100m inner barrel sensor 96 12 laser driver PA readout hardware shopping list – for 8 sensors (4 XY planes) • 8 CMS hybrids (6 chips version) • 8 analogue opto-hybrids • optical stuff (need to discuss details with expert) laser fibres -> 12 way ribbons -> long dist. cables -> FED need 24 fibres altogether – 2 x 12 way ribbons • 1 FED • 1 TTCvi – provides electrical TTC signals • 1 TTCex – provides electro-optical conversion • 1 crate controller control hardware assume providing electrically i.e. without CCU, etc.. • SeqSi (40 MHz/L1) • 2 x VI2C (4 chans / board) • trigger logic + power supplies, crates (1 or 2), cables, connectors, …. XY plane box (light tight) 250 mm 250 mm ~50 mm baseplate (dimensions not critical) adjustable feet for levelling XY plane box (light tight) RS diecast box (sides not at right angles to base) 250 mm ~100 mm 250 mm ~100 mm vertical piece to mount box on baseplate (dimensions not critical) adjustable feet for levelling method of fixing vertical piece to baseplate not shown XY plane few 10’s m TTCvi TTCex SeqSi VI2C crate controller ~m 9U/6U VME FED XY plane XY plane ~m XY plane I2C: 1 bus per plane actively split inside plane module also opto-isolated Ck/T1: 1 shielded pair per plane CK/T1 combination at VME end (separate module) 1 fibre ribbon (50% utilised) per plane I2C link 5V ~ 10’s m VI2C buffer buffer 5V optoisolate 5V 2.5V 5V 2.5V level shift I2C de-mux VME (1 channel) separate VME buffer module (4 chan – can also incorporate Ck/T1 opto-buffering) 1st APV/opto hybrid level shift 2nd APV/opto hybrid ancilliary I2C circuits within front end XY plane enclosure level shift resets Ck/T1 link SeqSi Ck T1 Ck/T1 combine ~ 10’s m opto-receiver 1st APV/opto hybrid 2nd APV/opto hybrid opto-buffer opto-receiver 1st APV/opto hybrid 2nd APV/opto hybrid opto-buffer opto-receiver 1st APV/opto hybrid 2nd APV/opto hybrid opto-buffer opto-receiver 1st APV/opto hybrid 2nd APV/opto hybrid opto-buffer fibre-optic HT 1 I2C bus comes in split into 3 (2 modules + Peltier) and also generate reset Ck/T1 comes in as combined signal but needs to be recovered and buffered as LVDS will need Peltier control circuitry AOH power I2C, RST Ck/T1 AOH power I2C, RST Ck/T1 HT AOH power I2C, RST Ck/T1 HT Optical rail system up to 2 m 50 mm 80 mm X48 system from www.newport.com assume this will sit on stable table (provided by someone else) feet allow some adjustment for levelling will still need some other mechanism for overall height HV 2k2 680 +HV 1k 10k HT AOH power I2C, RST Ck/T1 ceramic piece (same thickness as hybrid) ceramic hybrid HV, LV I2C, RST Ck/T1 AOH sensor Al support plate with cutout beneath sensor ceramic piece (same thickness as hybrid) ceramic hybrid HV, LV I2C, RST Ck/T1 AOH sensor Al support plate with cutout beneath sensor HV, LV I2C, RST Ck/T1 AOH sensor Al alloy plate 215 mm 12 mm 80 mm 75 mm 15 mm 18 mm ~3 mm ceramic piece (same thickness as hybrid) ceramic hybrid HV, LV I2C, RST Ck/T1 AOH sensor Al support plate with cutout beneath sensor peltier heatsink fan HV board colour + caps power + contrl (type 1) .. .. .. .. .. ... power + contrl (type 2) .. .. .. single sided Cu PCB .. .. ... 0.1” pitch holes Cu only as viewed on surface of board .. ... ... .. ... ... .. ... ... .. ... ... RS 681-0743 2x10 way DIL horiz socket 0.2” 0.05”