Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Detector Performance and

AIV Plan of the Ge:Ga QM Detector Arrays

Dirk RosenthalMPE

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Module Testing

• Spectral Response Measurements (all delivered Modules)

• Cryogenic enviromental testing (QM 10/24):

- thermal cycling (PACS-NT-PL-004)

- cryovibration (PACS-ME-TP-004)

• Spectral calibration and glitch investigation (QM 10/24)

• Module performance tests (EM 5/6, QM, FM, FS)

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Ground Support Equipment

Cryo-vibration:

Configuration for Y-axis

Spacecraft Y

FU Berlin shaker-proof cryostat

Spectral Calibration and Glitch Investigation:

OGSE 2

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Ground Support Equipment

Detector Performance Tests:

OGSE 1 • two cryostats at MPE: - bandpass and attenuation filters - internal (cryogenic) blackbody

• one cryostat at MPIA: - bandpass and attenuation filters - external (hot) blackbody with chopper

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

TIA Performance Tests

Blue: low stressedRed: high stressed

Low stressed (MPIA):P=8.5x10-14 W, Tdet = 3.5 KHigh stressed (MPE):P=1x10-12 W, Tdet = 1.9 K

• Responsivity: - low stressed: R > 5 A/W @ 160 mV bias

- high stressed: R> 15 A/W @ 40 mV bias

• QE: - low stressed: compared to earlier attempts better knowledge of absolute flux level but read-out noise too high to allow determination of QE

- high stressed: QE= 25% @ 30 mV – 36% @ 60 mV bias

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

AIV Plan of the Ge:Ga QM Detector Arrays

detectormodules

arrayhousing

detector performance

dummy modules

array assembly

: current status

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

AIV Plan of the Ge:Ga QM Detector Arrays

detectormodules

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

AIV Plan of the Ge:Ga QM Detector Arrays

detector performance

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

dummy modules

AIV Plan of the Ge:Ga QM Detector Arrays

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

array housing

AIV Plan of the Ge:Ga QM Detector Arrays

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Array Housings - Status• Design present (red and blue array)• Interfaces defined • mockup almost ready

Blue array Red array

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Array Housings - Status• structural analysis for blue array performed: -> lowest eigenmode at 461 Hz

Global Modes Housing:– Mode 1 461 Hz– Mode 2 660 Hz– Mode 3 810 Hz– Mode 4 948 Hz– Mode 5 962 Hz

Local Modes of Detector Modules– 1008 und 1019 Hz– 1356 und 1386 Hz

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

array assembly

AIV Plan of the Ge:Ga QM Detector Arrays

Detector Performance and AIV

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PACS IBDR 27/28 Feb 2002

Schedule: QM and FM Arrays