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Cost Estimate (and configuration)

Cost Estimate (and configuration). Drew Baden Univ. Of Maryland July 2001. HB, HO, and HE Geometry. Layer 0 in HB and HE eliminated in readout HE h =28 and 29 combined into 1 TPG HE h >21 has 10° segments, therefore 2 TPG/channel. HF Geometry. For this estimate, use h/f scheme:

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Cost Estimate (and configuration)

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  1. Cost Estimate (and configuration) Drew Baden Univ. Of Maryland July 2001

  2. HB, HO, and HE Geometry • Layer 0 in HB and HE eliminated in readout • HE h=28 and 29 combined into 1 TPG • HE h>21 has 10° segments, therefore 2 TPG/channel

  3. HF Geometry • For this estimate, use h/f scheme: • 36 f-towers, 12 h-towers, 2z, 2F/B • should be ok to 10% for cost estimate but will clean it up ASAP

  4. Constraints • Magic numbers: • 3 channels per fiber • 1 channel = 1 TPG for HB, HE<21 • 1 channel = 2 TPG for HE>21 • HF is complicated (more later) • TPG: • 8 TPG per SLB • 3 (or fewer) SLB per HTR • DCC input bandwidth • 140 bytes/HTR • 100kHz L1A • <200MB/s total • limits crates to 15 or fewer HTR

  5. Proposal • HTR • 24 channels, or 8 fibers, per HTR • limits HTR to 3 or fewer SLB • SLB are the “daSilva” TPG transmitter boards to Level 1 • boards are large - can maybe accommodate 4 but would be at expense of front-panel space • 8 TPG pair per SLB, therefore 24 TPG/HTR. Going to 4 would make 32 TPG/HTR, but 32 channels, 3/fiber…doesn’t fit! • We are SURE that 24 channel HTR cards will assume a minimal of risk for going to the HTR prototype • VME • 15 or fewer HTR per VME crate at full 24-channel occupancy • for 120-140bytes/HTR @ L1A, bandwidth is 180-210 MB/sec • this is for 10 time buckets + TPG + 1 byte/remaining channels + 15% occupancy • my feeling: we will be ok here • e.g. 10 time buckets is probably overkill?

  6. HB/HE  TDAQ Mapping • HB 1-h-10 • 2 crates, 15 HTR/crate, 1 channel = 1 TPG, 3 SLB/HTR • HB 11-h-14 • 1 crate, 12 HTR, 1 channel = 1 TPG, 3 SLB/HTR • HB h=15 • 1 crate, 9 HTR, 3 channels per TPG sum, 9 SLB • HB+HE h=16 • 1 crate, 12 HTR, 4 channels per TPG sum, 12 SLB • 3/4 SLB per HTR, not sure if it’s really doable (ask WSmith!) • HE 17-h-20 • 1 crate, 15 HTR, 2 channels/TPG for h=17 and 1:1 for 18-20

  7. HB/HE  TDAQ Mapping(cont) • HE h=21 and 22 • since 1 channel = 2 TPG, can only put 4 fibers into HTR • use the unused fibers for HB PINS • 4 fibers x 3 PINS = 12 PINS/card • need 3 HTR cards for each annulus • 3 x 4 fibers x 3 fibers/channel = 36 x 10° = 360° • 36 PINS total per HTR x 2 HTR = 72 PINS • takes care of all HB PINS • HE h=23 and 24 • same as above, only here we put all 72 channels of HE PINS • 1 crate for HE 21-h-24 • 12 cards, still 3 SLB/card = 36 SLB

  8. HB/HE  TDAQ Mapping(cont) • HE h=25 and 26 • 2 longitudinal channels in sum, still 10° • therefore half number of SLB as previous crate • same number of HTR cards (12) • HE h=27 • 5 longitudinal channels in sum, still 10° • 5 fibers x 3 channels/fiber = 15 channels, or 30° per HTR • 12 HTR covers this annulus • still 72 TPG/annulus, 8 channels/SLB, or 9 SLB total

  9. HB/HE  TDAQ Mapping(cont) • HE h=28 and outer “radiation” annulus (29) • add together to form 1 TPG annulus • same 12 HTR as previous annulus now covers 0<f<p • each HTR must receiver: • 3 fibers for 2 channels of h=28 and “29” (Df=20°) • 9 HTR makes 180° coverage • 180 means 36 TPG channels, or 4.5 SLB • will this work? WSmith says maybe….TBD • must use 2 VME crates to cover these annuli

  10. HO  TDAQ Mapping • No SLB! • 15 HTR/crate: • 24 channels/card, 120° of Df per HTR, 3 HTR/annulus • Total of 3 crates for each HO, 6 total

  11. HF  TDAQ Mapping • Need 12 HF towers to make 1 TPG: • 3h, 2f, 2z • 12 channels means 4 fibers • therefore 2 TPG per 1 HTR, or .5 SLB/HTR • 1 HTR covers 3 units h, Df 40° • would need 9 HTR to cover 3 units of h, all 360° • 4 sets of 9 would cover all 12 units of h • 36 HTR total, can stuff into 3 VME crates of 12 HTR/crate • total of 6 VME crates for entire HF • NOTE: will go up when get better understanding of mapping

  12. Unit Costs • HTR • $2600/HTR latest estimate • includes a $1200 Xilinx XCV815EM for all 24 channels • decreases card connectivity, has 1.12Mbit block RAM! • Can perhaps go to 405EM, 560kbits, but no understood yet • would save about $600/card • Optical-to-Electrical finally sorted out (we hope) • StratusLightwave SQR-45-9-1 - quad 1.6Gb,850nm,receiver • “quotes” (courtesy of Rob’s persistence!) $130, or $260/card • DCC/HRC • stick with the $5k/card estimate • VME • $5.5k/crate, $3k/rack, 3 crates/rack • only 10% spares on everything (except VME)

  13. Cost Estimate • Cards: • HTR: 469 cards, $1,235k • DCC: 38 cards, $ 190k • HRC: 38 cards, $ 190k • VME: • Crates: 34, $187k • Racks: 12, $ 36k • TPG Cables: • Total $36k • Grand Total: • $1.930M

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