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 TRP Reference: T608-12QM Study of the impact of the power meshed plane on electromagnetic behaviour of Title: electronic boards (PCBs). To improve the adhesion between the successive layers, and thus the reliability of PCBs, a qualified manufacturer is willing to replace full planes by meshed planes in PCBs. These modifications will impact the electromagnetic behaviour of electronic equipment. The goal of the study is to evaluate, in large frequency band (up to 3 GHz), the impact of meshed plane on the radiated emission, the signal integrity and the crosstalk. The study will consist on a bibliographic research on the topic, an experimental study of comparative measurements between configuration with full plane and with meshed plane; and a theoretical study in order to modelise the effect of meshed plane on electrical characteristics. Deliverables: Reports and documentation. Current TRL: TRL1 Target TRL: TRL1-2 Application Need/Date: TRL5 by 2010 Application/Mission: All projects Contract Duration: 15 months SW Clause : - Dossier0 Ref.: T-7894 Consistency with Harmonisation Roadmap and Conclusions: N/A TRP Reference: Title: T608-15QM Test and validation of contamination models through ground experiments modeling Contamination can have a major detrimental impact on space systems. Its assessment is performed through physical models of contaminant emission, transport and effects. At system level contamination can only be assessed through numerical modeling, due to the complexity of a whole spacecraft. Unfortunately, the models and numerical tools under use have not yet been physically validated. A first reason is the difficulty and cost of flight experiments. A second reason was the inability of the old contamination software (ESABASE/OUTGASSING) to model ground experiments. This second problem has now been solved by the new software COMOVA, developed in a QMC-EMA mini project which was completed in 2000 (this new code also incorporates improved deposition models). It is thus now both possible and necessary to validate this new code and its physical models through ground tests. The proposed action consists in:- gathering ground data involving outgassing, deposition, re-emission. They can be existing VBQC data (with reemission) or a new dedicated experiment involving more complex transport paths.- modelling these ground experiments with COMOVA and comparing data and simulation- improving the modelling, either simply by improving the extraction of the deposition and re-emission parameters from basic experiments, or if necessary by improved the physical models implemented in COMOVA. Deliverables: Proposal for ground testing of a complex structure in a large facility; model of the structure outgassing and contamination characteristics; test and critical comparison of model and experiment (and adaptation of model if needed). Current TRL: TRL2 Target TRL: TRL3 Application Need/Date: TRL5 by 2010 modelling contaminants for optical Application/Mission: Contract Duration: 12 months satellite, such as GAIA, JWST, AEOLUS SW Clause : - Dossier0 Ref.: T-855 Consistency with Harmonisation Not directly linked to harmonised technology. Roadmap and Conclusions: Page 225 of 227
TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 TRP Reference: Title: T608-30QM Joining technology to bond Carbon to Carbon in stable sandwich structures Selection of a technology to bond Carbon to carbon for ultrastable structure - verification of the soundness of the technology at sample level. Deliverables: Trade off, Technical notes, Test plan, sample manufacturing, test report. Current TRL: TRL1-2 Target TRL: TRL2-3 Application Need/Date: TRL5 by 2010 very stabe structures / optical benches / Application/Mission: telescope supports; missions coming Contract Duration: 15 months after LISA SW Clause : - Dossier0 Ref.: T-4878 Consistency with Harmonisation Roadmap and Conclusions: TRP Reference: T608-33QM Title: Radiation stable optical adhesives High-tec., high performance optical adhesive and gluing process for optical assemblies exposed to high intensity radiation (visible, IR, UV, X-ray, gamma-ray,...). Typical applications are transparent silicone adhesives in solar cell assemblies (SCA) to bond cover glasses onto solar cells. Recent developments in shifting the spectral cut-off of cover glasses to shorter wavelength (e.g. CMO) to gain power output of the SCAs, does accelerate the degradation of the adhesive. Moreover there is a trend to reduce the thickness of the cover-glass thus increasing penetration of radiation into the adhesive. Currently, only one US manufactured adhesive is exhibiting adequate long term stability. The applications are not limited to SCAs, and cover any payload that require gluing of optical components that are exposed to high intensity irradiation. Deliverables: Technical notes, Test plan, sample manufacturing, test report, test samples tested in relevant environment. Current TRL: TRL2 Target TRL: TRL3 Application Need/Date: TRL5 by 2011 future GEO spacecraft (high power output), long lifetime, mass saving thanks to thiner coverglasses); Application/Mission: interplanetary missions (solar panels Contract Duration: 24 months pointing sun >> high intensities); high power optical systems SW Clause : - Dossier0 Ref.: T-5326 Consistency with Harmonisation Roadmap and Conclusions: Page 226 of 227
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