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Opto Harness FDR

Opto Harness FDR. Scope and aims of review, system overview Available documentation Status of Project & Schedule Prototype results Barrel and Forward harnesses Definitions Assembly and Test procedures Outstanding Issues. ATLAS SCT Opto-links. Scope and Aims.

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Opto Harness FDR

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  1. Opto Harness FDR • Scope and aims of review, system overview • Available documentation • Status of Project & Schedule • Prototype results • Barrel and Forward harnesses • Definitions • Assembly and Test procedures • Outstanding Issues T. Weidberg

  2. ATLAS SCT Opto-links T. Weidberg

  3. Scope and Aims • Review concepts for entire system • Electrical and optical services for barrel and forward SCT. • Look at prototype results • Review proposed procedures for • Assembly of barrel and forward harnesses • Test • Mounting on barrels and disks. • QA T. Weidberg

  4. Documentation • Aim to have full documentation on EDMS. • Common items • Barrel Harness • Forward Harness • Availability : • green – available now • Purple – required for PRR or later • Red - still missing. T. Weidberg

  5. SCT Link Common Items(1) Opto-Electronics • VCSEL (Taiwan)ATL-IS-TR-0004 • PINs (Birmingham) ATL-IS-TR-0005 • ASICS • VDC (TW) ATL-IS-ES-0044 • DORIC4A (TW) ATL-IS-ES-0043 • DRX (TW) ATL-IS-ES-0045 • BPM12 (TW) ATL-IS-ES-0046 • Off-Detector • PIN array (Taiwan)ATL-IS-ES-0051 • VCSEL array (Taiwan)ATL-IS-ES-0052 • (BOC card ???– Cambridge) • Fibres and Connectors • Rad-hard fibre specs (TW) ATL-IS-ES-0048 • MT connector, spring clips and Infineon connectors (JM)ATL-IS-ES-0053 T. Weidberg

  6. SCT Link Common Items(2) • Protective cable (CM) • Adhesives (JM)ATL-IS-ES-0054 PP2 • Fibre connections (JF) • Cable connections (AN) • Qualification Testing (SG) ATL-IS-ES-0055 • Database (CM & TW) ATL-IS-AT-0007 (what data is stored and how) T. Weidberg

  7. Barrel Harness (1) Requirements and specifications (TW)ATL-IS-ES-0049 Harness definition and interfaces (AN & JF) ATL-IS-AT-0008 (This includes drawings and tables with geometrical specs, fibre lengths and low mass tape lengths up to PPB1.). Design Information • barrel opto-packages (Taiwan)ATL-IS-AT-0009 • Dog-legs, redundancy links and interface PCBs (MJ & TW)ATL-IS-ES-0047 • Low mass tapes (Ljubljana)ATL-IS-AT-0013 • Harness screening and grounding (AN & MM)ATL-IS-ES-0056 • PPB1 for fibres and low mass tapes (AN & Ljubljana)ATL-IS-ES-0057 • PPB1 to PP2 cable and fibre lengths (AN & JF) T. Weidberg

  8. Barrel Harness (2) • Prototype results • Results for prototype barrel harness (module-1s and module0s) (CM)ATL-IS-TR-0006 • Production and Testing • Test and assembly flow chart (CM and JM)ATL-IS-AP-0055 • Results for prototype barrel harness (module-1s and module0s) (CM)ATL-IS-TR-0006 • Detailed assembly and test instructions (Taiwan) • Tests at RAL on receipt of harness (TW)ATL-IS-ES-0058 • Installation on barrels (JM) ATL-IS-AP-0058 T. Weidberg

  9. Forward Harness (1) • Requirements and specifications (TW)ATL-IS-ES-0063 • Harness definition and interfaces (JT and JN)ATL-IS-AT-0011 • (This includes drawings and tables with fibre lengths up to PP0.) • Design Information • Forward SCT opto-packages (Taiwan)ATL-IS-ES-0059 • PPF0 (JT)ATL-IS-EN-0010 • PPF0 to PP2 cable and fibre lengths. • Prototype results • Results for prototype forward fibre harness (CM)ATL-IS-TR-0007 T. Weidberg

  10. Forward Harness (2) • Production and Testing • Test and assembly flow chart (CM and JM)ATL-IS-AP-0056 • Detailed assembly and test instructions (Taiwan) • Tests at RAL on receipt of harness (TW)ATL-IS-ES-0060 • Installation on disks (JM)ATL-IS-AP-0057 T. Weidberg

  11. Project Status • 4 module-1 barrel harnesses assembled and used successfully at the system test at CERN. • New designs exist for larger round cooling pipe. Key test: thermal performance. • Barrel 3  RAL in April ’02.  start harness production Jan. ’02. • Six forward fibre harnesses assembled. T. Weidberg

  12. Prototype –1 Barrel Harness for old round cooling pipe 6 opto-flex cables with opto-package & ASICs 6 sets low mass tapes T. Weidberg

  13. Opto-flex & Round Cooling Pipe • New opto-flex designs compatible with barrel drawings. Checked with mechanical dummies on UCL barrel model. Clearance of 1.27 mm to silicon. • Thermal Management • Transfers heat from opto ASICs to cooling block via AlN and Cu layer in flex.. • FEA ok • Need to confirm with measurements.. 30 mm Space for opto-package+ ASICs T. Weidberg

  14. Outstanding Issues(1) • Verify thermal FEA for opto-flex • Thermal measurements on prototypes at RAL. • Barrel system test with module-0 barrel opto-flex • Aim to produce 8 module 0 style barrel opto-harnesses. • Forward system test • 6 forward fibre harnesses are available at CERN. • Verify thermode soldering technique for Al/kapton tape to PCBs • Proof of principle tests ok for Al. • Procedure widely used in industry for Cu/kapton tapes (mobile phones). • Complete reliability studies • Finalise QA and database T. Weidberg

  15. Outstanding Issues (2) • Verify lengths for harnesses with mechanical models • Barrel harness lengths checked with barrel model at UCL. • Similar check required for forward SCT. • Understand implications of forward SCT possible change to KB • Complete SEU studies • Operate opto-flex+SCT module in beam (T7 @PS). • Check for effects of SEU induced clock jitter on ABCD. Measure BC counter errors. T. Weidberg

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