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PACS Status Report - WE SVR-2 MPE , 1 8 Jan 200 7 O.H. Bauer

PACS Status Report - WE SVR-2 MPE , 1 8 Jan 200 7 O.H. Bauer. FM ILT: WE Configuration. DPU FM SPU FM (partly repaired) DECMEC EQM (not redundant and only blue array) BOLC FM Second set-up used for SPU OBS development. FPU Cold FocalPlaneUnit. BOL/COOL. BOL/BAU. DEC/MEC 2.

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PACS Status Report - WE SVR-2 MPE , 1 8 Jan 200 7 O.H. Bauer

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  1. PACS Status Report - WE SVR-2 MPE, 18Jan 2007 O.H. Bauer

  2. FM ILT: WE Configuration • DPU FM • SPU FM (partly repaired) • DECMEC EQM (not redundant and only blue array) • BOLC FM • Second set-up used for SPU OBS development

  3. FPU Cold FocalPlaneUnit BOL/COOL BOL/BAU DEC/MEC 2 DEC/MEC 1 SPU nominal BlueBol BAU MEC I/F-Module Redundant BOL 1 Module BlueGe:GaArray &CRE MPE/ASTEQ/IMEC MEC I/F-Module IAC-Tenerife/TU-Wien DPU nominal DSP Module Redundant RedBol BAU BOL 2 Module BlueBolArray &Read-out CEA DSP Module SPU redundant CEA Cooler Control Warm Interconnecting Harness RedDEC Module RedBolArray &Read-out CEA BlueDEC Module IAC-Tenerife/TU-Wien DPU redundant CEA Base/PSU Redundant RedGe:GaArray &CRE MPE/ASTEQ/IMEC Base/PSU IFSI-ROME CSL-Liege CSL-Liege 0.3K Cooler CEA Grating Assy CSL-Liege Chopper Assy MPIA 2FilterWheels KT 2CalSources KT KT/MPE Instrument Overview and Subsystem Responsibilities Cryo-Harness 13

  4. WE Status I • DPU • Problems in CFM identified (ringing of bus lines) and S/W work-around implemented • FM apparently does not show the same symptoms, but showed some erratic behaviour (MEMCOPY routine caused corrupted data packets) • SPU, DECMEC (but also LFI REBA, ...) • During tests at CRISA read errors from the DSP program memory (PRAM), only with special memory contents, were found. • Error was found on all DSP PCBs  systematic design error! • PACS FM SPU partially repaired, can be used for FM ILT. •  Complete repair and re-qualification after ILT will take four weeks. • BOLC: OK

  5. WE Status II • DECMEC • During TV test (cold phase, -25°C) DECMEC FM stopped after one hour of operation: two dead transistors found, temperature/design problem Delivery of qualified FM (not EMC: can be done after FPU delivery) later than mid Feb has dramatic impact on ILT schedule and delivery Most of ILT has to be executed with EQM, which is not fully FM-equivalent (lacking redundancy, only blue DEC) Change to red array and swap of EQM against FM need warm-up to 40 K

  6. Schedule • Schedule Summary FM (refurbished CQM for FPU) • ILT at MPE: cool down started 19 Oct 06 • Partial warm-up/cool-down forchange to red Ge:Ga array 16/19 Dec 06 • Warm-up/cool-down for exchange • of chopper, repair of illumination • problem and possible DECMEC • exchange23 Dec 06 – 18 Feb 07 •  DECMEC FM delivery to MPE mid Feb 07 ?? • FM WE/FPU delivery to Project late April 07 !? • Schedule for FS FPU • FS FPU ready for possible • delivery to Project end Sep 07

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