Transcript Introduction

PACS Status Report - WE
SVR-2
MPE, 18 Jan 2007
O.H. Bauer
Herschel-PACS SVR-2
MPE, 18 Jan 2007
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
PACS Status Report - WE
Herschel-PACS SVR-2
MPE, 18 Jan 2007
Instrument Overview and Subsystem Responsibilities
DEC/MEC 1
FPU Cold
FocalPlaneUnit
MEC I/F-Module
BlueGe:GaArray
&CRE
MPE/ASTEQ/IMEC
BOL/COOL
DSP Module
BlueDEC Module
SPU
nominal
DPU
nominal
IAC-Tenerife/TU-Wien
Base/PSU
CSL-Liege
BOL/BAU
BOL 1
Module
BlueBol
BAU
BOL 2
Module
RedBol
BAU
Cooler
Control
BlueBolArray
&Read-out
CEA
RedBolArray &Readout
CEA
CEA
RedGe:GaArray
&CRE
MPE/ASTEQ/IMEC
CEA
0.3K Cooler
CEA
DEC/MEC 2
DPU
redundant
IFSI-ROME
SPU
redundant
MEC I/F-Module
Redundant
Grating Assy
CSL-Liege
DSP Module
Redundant
Chopper Assy
MPIA
IAC-Tenerife/TU-Wien
Cryo-Harness
Warm Interconnecting
Harness
PACS Status Report - WE
RedDEC Module
2FilterWheels
KT
Base/PSU
Redundant
2CalSources
KT
KT/MPE
CSL-Liege
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Herschel-PACS SVR-2
MPE, 18 Jan 2007
WE Status I
•DPU
–Problems in CFM identified (ringing of bus lines) and S/W workaround 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
PACS Status Report - WE
Herschel-PACS SVR-2
MPE, 18 Jan 2007
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 FMequivalent (lacking redundancy, only blue DEC)
Change to red array and swap of EQM against FM need warm-up
to 40 K
PACS Status Report - WE
Herschel-PACS SVR-2
MPE, 18 Jan 2007
Schedule
•
Schedule Summary FM (refurbished CQM for FPU)
• ILT at MPE: cool down started
• Partial warm-up/cool-down for
change to red Ge:Ga array
• Warm-up/cool-down for exchange
–
of chopper, repair of illumination
–
problem and possible DECMEC
–
exchange
–
 DECMEC FM delivery to MPE
• FM WE/FPU delivery to Project
•
19 Oct 06
16/19 Dec 06
23 Dec 06 – 18 Feb 07
mid Feb 07 ??
late April 07 !?
Schedule for FS FPU
• FS FPU ready for possible
–
delivery to Project
PACS Status Report - WE
end Sep 07