MIR Camera and Spectrometer
The combined MIR Camera and Spectrometer (MCS) has both photometric imaging and spectroscopic capabilities over the 5–38 μm wavelength range. The instrument is split into two channels, short (S) and long (L) wavelength, with two non-overlapping fields of view.
The wide field camera will cover the 5–25 μm (S) and 20–38 μm (L) wavebands with fields of view of 5' x 5'. A filter wheel will provide a selection of broad- and narrow-band filters with a resolution of R~5–10 and R~50 respectively. Three different spectroscopic modes are currently under consideration: high resolution mode (R ~ 20–30,000), covering 4–8 μm (S) and/or 12–18 μm (L), with a slit length/width of 3.5" x 0.72" and 6" x 1.2" respectively; medium resolution mode (R ~ 1– few thousand) covering 12.2–23.5 μm (S) and 23–38 μm (L) with a slit length/width of 12" x 1.2" and 12" x 2.5" respectively, and low resolution mode (R ~ 50–100) covering the 5–26 μm (S) and 20–38 μm (L) wavebands with slit length/width of 2.5' x 2.66" and x 1.4" respectively. The medium resolution spectrometer will have an integral field unit, and fields of view of up to 12" x 6"(S) and 12" x 7.5" (L) will be built up from individual (five for S, three for L) slices.
Si:As detectors will be used for the all short-wave channels and Si:Sb for the long-wave channels, with the exception of the high-resolution long-wave channel where Si:As will also be employed.
The Focal Plane Camera will operate at the 0.7 μm waveband, and will be used for fine guidance. The instrument, provided by Korea through the Korea Astronomy and Space Institute (KASI), will have two channels for redundancy, one of which is proposed for scientific use at the 0.7–5 μm waveband. The instrument field of view will cover 5' x 5', with wideband filters (R ~ 5) and a linear variable filter (R ~ 20) providing photometric imaging and low-resolution spectroscopic imaging respectively.
The US community is proposing a far-infrared/submillimetre spectrometer, which is more sensitive than SAFARI but has no imaging capability, and hence can be complementary with SAFARI.
The SPICA focal plane instrument suite is the subject of an on-going scientific and engineering review (2011), the result of which will be a decision on the final complement of instruments to be flown on SPICA.