SPIRE Design Description - Research Services

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Draft SPIRE Design Description Document Figure 3-2 Schematic diagram of the sub-systems of SPIRE contained on the Herschel SVM. The only interface between the SPIRE subsystems inside the CVV and the WE on the SVM is via the 13 bulk head connectors (and associated harnesses) shown at the top of Figure 3-1. The SPIRE harnesses that connect to the outside of the CVV connect to the WE on the left hand side of Figure 3-2. This schematic shows the Detector Readout and Control Unit (DRCU), the Focal-Plane Control Unit (FCU), the Digital Control Unit (DCU) and the electrical interfaces with the Herschel spacecraft. Figure 3-3 shows a view of the FPU on the Herschel Optical Bench. Figure 3-4 and Figure 3-5 show views of the photometer and the spectrometer with the various subsystems. A detailed description of the design of all the systems of SPIRE is given in §4. 22
Draft SPIRE Design Description Document Figure 3-3 External view of the SPIRE FPU on the Herschel Optical Bench c/w with photometer and spectrometer beam envelopes. SPIRE Optical Bench Filter Units Spectrometer Beam Photometer Beam 23 Mirror (M6) and Spectrometer Pick-off Mirror (M6s) Mirror (M7) Mirror (M5) Mirror (M3) He 3 Cooler Stray Light Baffle Beam Steering Mirror (M4) Bolometer Detector Arrays Figure 3-4 View of photometer side of the instrument with the FPU outer cover removed.
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