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MM base material procurement

MM base material procurement. A proposal how to proceed. The base material. PCBs for readout boards Need 2048 PCBs of different dimensions; proposal to group where possible two PCBs in one sheet. This reduces the number of sheets to process to 1600. These numbers do not include spares.

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MM base material procurement

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  1. MM base material procurement A proposal how to proceed P. Iengo/J. Wotschack

  2. The base material • PCBs for readout boards • Need 2048 PCBs of different dimensions; proposal to group where possible two PCBs in one sheet. This reduces the number of sheets to process to 1600. These numbers do not include spares. • Maximum dimensions for LM2 PCBs #2 (2154 mm) and #3 (2220 mm) are close to or exceed standard length of 2187 mm. Can we cut edges to stay within standard length? –> Givi (need a proposal drawing) • Cost envelope: O(100 kCHF) • PhotoimageablecoverlayPyralux PC1025 • Cost envelope O(50 kCHF) ? • PCBs for drift panels (drift electrode) • SM1: single PCB with dimensions (1200 x 2210 mm2); other modules follow readout PCB dimensions: ≤ 2187 x 600 mm2 • Cost envelope: O(150 kCHF) • How to order? • Centrally through CERN for all PCBs ? • INFN does its own order for SM1 PCBs? P. Iengo/J. Wotschack

  3. Delivery of base material • Options for PCBs • Buy now and get it delivered to CERN asap; test and store at CERN, and then dispatch to production sites • Buy now and specify delivery directly to production sites (if possible, added tax issue) • Coverlay • Has short shelf time • Need to specify delivery ‘just in time’ P. Iengo/J. Wotschack

  4. Next steps • PCBs • Departemental Purchasing Request for PCBs to be submitted (Paolo + Rui) • One or two ? • Coverlay • No need for DPR (volume below 50 kCHF P. Iengo/J. Wotschack

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