document title / titre du document TRP W ORK PLAN ... - emits - ESA

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TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 the deliverable at ESTEC (where more adequate equipments exist). The present CCN will cover the needed upgrading of the deliverable by adding some peripheral units, including cooler and control electronics, to enable the above mentioned post delivery tests. Deliverables: Compact focal plane breadboard. Current TRL: TRL2-3 Target TRL: TRL4 Application Need/Date: TRL6 by 2009 Application/Mission: Bepi Colombo Contract Duration: 12 months SW Clause : - Dossier0 Ref.: T-7887 Consistency with Harmonisation Optical Remote Passive Instruments - Detectors Roadmap and Conclusions: Page 39 of 227
TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 2.2 - Missions in Pre-Assessment Phase: Darwin TRP Reference: Title: MMO-630 High Precision Optical Metrology The objective of this activity is to improve the reliability of the optical metrology sensors as developed to breadboard level for precise formation flying of the DARWIN satellites. The aim is to reach the maturity status of "elegant breadboard" representative in form, fit and function for some presently critical parts (e.g. interferometric head, heterodyne modulation sub-system and fibre coupling system). An emphasis shall be put on the measurement stability in vacuum and under reasonable thermal variations as well as vibrational constraints and over representative distances. The activity's detailed definition shall be made with an aim of using and testing this type of metrology on PROBA-3 and other space missions. The output of this activity will also help to better define follow on activities currently foreseen in the TRP, addressing miniaturisation of the current concepts and new measurement techniques. Deliverables: Elegant Breadboard Current TRL: TRL3 Target TRL: TRL4 Application Need/Date: TRL5 by 2008-2009 Application/Mission: Darwin, Proba III Contract Duration: 12 months SW Clause : - Dossier0 Ref.: T-7971, T-7747 Consistency with Harmonisation Roadmap and Conclusions: Roadmap: N/A TRP Reference: T203-06MM Title: Passive optical components for interferometry The first objective of this activity is to design, manufacture and test passive optical components for interferometry. This includes the development of achromatic beam splitters, dichroic filters, compensation and polarization plates, wide band antireflection coatings, etc. The second objective is to establish manufacturing techniques and technologies to achieve a constantly high optical quality of the above-mentioned components, such that differences between the interferometer arms are minimized. The functionality and performance of the components shall be demonstrated by means of a breadboard that shall be subjected to a verification test campaign in an environment compatible with DARWIN mission (e.g. Cryogenic Interferometry Facility).The broadband infrared beam (6-18 micron) has to be split in a specific ratio and accurately over the full wavelength range. Current technology for beam-splitters does not allow such accurate beam splitting over wide spectral ranges. Furthermore a number of dichroic plates, polarization beam splitters, compensator plates, antireflection coatings (e.g. multilayer dielectric stacks or sub-nm gratings, etc. on bulk and optical waveguides), reflective mirrors (with special metallic and associated protected coatings) are also used in the interferometer. The selected contractor will investigate and define techniques to guarantee and control minute differential effects between the arms of the interferometer during the manufacturing process, and will propose techniques capable of measuring such very small differences (e.g. differential spectral response, differential polarization effects, differential chromatic dispersion, etc). Deliverables: Breadboards of the passive components for interferometry, and modelization software. Current TRL: TRL2 Target TRL: TRL3-4 Application Need/Date: TRL5 by 2012 Application/Mission: Darwin Contract Duration: 24 months SW Clause : - Dossier0 Ref.: T-7987 Consistency with Harmonisation Roadmap and Conclusions: Page 40 of 227
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