The cold focal plane chopper of HERSCHEL's PACS instrument

Krause, O.; Lemke, D.; Hofferbert, R.; Böhm, A.; Klaas, U.; Katzer, Josef; Höller, Frank; Salvasohn, M.

doi:10.1117/12.671271

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…The chopper (Krause et al 2006) is capable of following arbitrary waveforms with a resolution of 1 and delivers a dutycycle of ∼80% at a chop frequency of 5 Hz.…”

Section: Front Opticsmentioning

confidence: 99%

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory

Poglitsch¹,

Waelkens²,

Geis³

et al. 2010

A&A

2,003

797

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The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments on ESA's far infrared and submillimetre observatory. It employs two Ge:Ga photoconductor arrays (stressed and unstressed) with 16 × 25 pixels, each, and two filled silicon bolometer arrays with 16 × 32 and 32 × 64 pixels, respectively, to perform integral-field spectroscopy and imaging photometry in the 60−210 μm wavelength regime. In photometry mode, it simultaneously images two bands, 60−85 μm or 85−125 μm and 125−210 μm, over a field of view of ∼1.75 × 3.5 , with close to Nyquist beam sampling in each band. In spectroscopy mode, it images a field of 47 × 47 , resolved into 5 × 5 pixels, with an instantaneous spectral coverage of ∼ 1500 km s −1 and a spectral resolution of ∼175 km s −1 . We summarise the design of the instrument, describe observing modes, calibration, and data analysis methods, and present our current assessment of the in-orbit performance of the instrument based on the performance verification tests. PACS is fully operational, and the achieved performance is close to or better than the pre-launch predictions. Key words. space vehicles: instruments -instrumentation: photometers -instrumentation: spectrographsHerschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

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“…The chopper (Krause et al 2006) is capable of following arbitrary waveforms with a resolution of 1 and delivers a dutycycle of ∼80% at a chop frequency of 5 Hz.…”

Section: Front Opticsmentioning

confidence: 99%

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory

Poglitsch¹,

Waelkens²,

Geis³

et al. 2010

A&A

2,003

797

View full text Add to dashboard Cite

show abstract

“…Numerical characters beside the box represent slicer number. No [1][2][3][4][5][6][7][8][9][10][11]. are from unit A and B, respectively.…”

mentioning

confidence: 99%

Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

et al. 2010

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A mid-infrared imager and spectrometer is under consideration for construction in the first decade of the ThirtyMeter Telescope (TMT) operation (see the companion paper by Okamoto). MIRES, a mid-infrared high-spectral resolution optimized instrument, was previously proposed to provide these capabilities to the TMT community. We have revised the design in order to provide an improved optical design for the high-spectral resolution mode with R=120,000, improved imaging with sky chopping, low-spectral resolution mode with an integral field spectrograph, and polarimetry. In this paper we describe the optical design concepts currently under consideration.

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The cold focal plane chopper of HERSCHEL's PACS instrument

Cited by 2 publications

References 4 publications

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory

Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

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