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This report provides an overview of the results from the Field Camera Unit (FCU) technical meeting, including the definition of scientific objectives, top-level requirements, and trade-off processes for optics, mechanics, and electronics solutions. It also covers the identification of critical elements, feasibility assessment, and costs.
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The Field Camera Unit Results from technical meeting S. Scuderi INAF – Catania
FCU subsystems WIC Meeting, Moscow, 27-30 June 2006
Phase A objectives • Definition of scientific objectives • Science team constitution • FCU top level requirements definition • Filter passbands definition • Analysis of technical (optics, mechanics, electronics) solutions to satisfy system and scientific requirements. • Identification of solutions through trade-off processes • Development of AIV and GSE principles WIC Meeting, Moscow, 27-30 June 2006
Phase B1 objectives • Identification of critical elements • Analysis of expected performances • Finalization of trade off processes • Consolidation of the project through feasibility of subsystems • Costs assessment WIC Meeting, Moscow, 27-30 June 2006
Cameras: objectives • Definition of cameras performances specifications: iterative process with science team • Opto-mechanical design of the cameras • Definition of the architecture of the detector (science & availability) • Geometric characteristics (dimensions, format, pixel size…) • Opto-electronics characteristics (QE, temporal resolution, dynamical range, operational modes, dark current, read-out noise…) • Definition of mechanisms • Preliminary design of electronics architecture (detector & mechanisms front-end electronics) • Definition of cameras mass, power and thermal budget • Definition of interface requirements with main frame (optics, mechanics, electronics, thermal) • Preliminary definition of operational modes of the cameras • Preliminary definition of calibration requirements: pre-flight & in-flight • Telemetry requirements WIC Meeting, Moscow, 27-30 June 2006
Cameras: top level requirements WSO-VIL-INST-CNF-0003 (21 Feb 2006)
FCU constraints definition • Available volume: =650mm h=170mm • Power Budget: 90W (TBC) • Mass Budget: 30kg (TBC) • 2kg per camera (TBC) • 10kg Imager case (TBC) • 14kg DHU & PSU (TBC) • Optical bench temperature: 20°3°C (TBC) • 3 Fixing points on the optical bench • Room for LSS detector(s) LSS detectors (TBC)
2 off axis cameras Pick up mirror Optics Mechanisms Shutter Filters wheels Focusing mechanism Detector Cameras layout • Center field camera • UV camera (SF-UV?) • Pick up mirror or central well(decision by end of 2006) • No Optics • Filters (3?) wheel • Detector Calibration Unit (Flat Field)