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Disk Sector Status

Disk Sector Status. Technical Status. Three prototypes to current dimensions(8-sector disks) except for tube length made or will be done by next week. One with CGL and two with epoxy(AIT EG7658) between Al tube/faceplate.

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Disk Sector Status

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  1. Disk Sector Status

  2. Technical Status • Three prototypes to current dimensions(8-sector disks) except for tube length made or will be done by next week. • One with CGL and two with epoxy(AIT EG7658) between Al tube/faceplate. • So far, sectors made with CGL meet all specs. Epoxy is backup in case we find difficulties during production. Don’t have time to completely qualify sectors with epoxy before PRR. • Has been little additional testing in last months. • “Loss of coolant” test at room temperature of irradiated sector. Sector reached 135oC, steady state, held for some minutes and then coolant turned on. Thermal performance still OK. • Irradiated sector piece exposed for weeks to 100% C3F8 vapor at room temperature. No effect seen in thermal performance. • All old(FDR) requirements met by baseline design

  3. Technical Status(2) • Thermal shock to -35 needs to be done • This would require new set up(LN2 vapor?), that doesn’t yet exist. • Also use for thermal cycling?

  4. Disk Sector Production Page

  5. Status(1) • Requirements(Gil) • Revised version sent to Marco • Needs final checking, global changes(eg. fault conditions) • Interfaces(Eric/Gil) • FDR version “marked up”. Needs new drawings, grounding defined..a number of changes • Drawings(Dave, Jon, Eric) • Preliminary set of drawings complete(Dave, Eric, Jon) • Detailed list of outstanding fabrication and tooling drawings/figures made(Eric/Jon) and in progress. Next complete update by end of May? • Tolerances and other information(Eric). Will be largely included in revised drawing set. • Schedule(Gil, Jon, Mike) • Preliminary baseline schedule complete. Next update by mid-June, for PRR.

  6. Status(2) • Component purchases(Jon, Gil) • Production tubes on order, delivery by June • Production carbon-carbon plates ordered, first inspection(before heat treatment and CVD) complete(OK), processing progress. • Foam just ordered • Miscellaneous materials(adhesives, etc) to be ordered • Mounting button material still not finally fixed yet. PEEK, C-filled PEEK or C-C. • Vendor QC/QA • Allcomp visited, plates inspected, travellers with each plate OK • Allcomp will also make CVDed foam. QC to be worked out but is essentially weight of each piece. • No other significant vendor QC/QA

  7. Status(3) • QC/QA at LBL(Gil, Jon) • Preliminary ATLAS part number ID made • Draft individual travellers complete for • aluminum tubes • faceplates • assembled sectors • Will be batch travellers(not each part) for fittings, strain relief pieces, hardpoints • Detailed QC procedures for each piece/assembly(what to measure) largely exist and have been tried on prototypes but need to be formally documented in “how to” manual. • Summary QC/QA document for PRR needs to be written, mostly referring to these more detailed procedures, etc.

  8. Status(4) • Production personnel • Primarily Jon and Tom • Current plan • Start pre-production in July • Produce enough sectors to populate one disk • Test • Go ahead for full production Jan. ‘02

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