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: Title: T204-07MM TES Spectrometer Small arrays of Transition Edge Sensor devices have been demonstrated to work at high X-ray energies, but do not meet XEUS energy resolution requirements. These detectors form a baseline for the next generation X-ray observatories instrumentation. For the XEUS energy range, fabrication of devices with lower heat capacity is necessary to meet the required performance. At the same time massively increasing the array size to match field of view requirements is required, which needs development of lead-out technology and multiplexing. The low energy performance needs to be developed & optimised for resolution and efficiency. Deliverables: Technical notes. Breadboarding. Current TRL: TRL2 Target TRL: TRL3 Application Need/Date: TRL5 by 2010 Application/Mission: XEUS Contract Duration: 18 months SW Clause : - Dossier0 Ref.: T-7967 Consistency with Harmonisation Roadmap and Conclusions: TRP Reference: T204-08MC Title: 50mK Continuous Cooling System Future Scientific Mission as e.g. Xeus require temperatures for the detection chain between 50mK-100mK. For such applications, the need to develop in advance a vibration-free cooling system with a long lifetime which covers the cooling in the temperature range 4.5K down to 50mK was identified. The objective of this activity is to design a 50 mK cooling system, compatible with current mechanical coolers providing a pre-cooling temperature of 4.5K (4.5K- JT cooler qualified for Planck Mission). Different technologies can be used for building a system that reach 50mK, as e.g. Adiabatic Demagnetisation Refrigerators, dilution cooler or hybrid systems using He-sorption cooler for pre-cooling at 300mK. Current European technologies such as ADR or He-sorption are single shot devices and therefore only allow a limited observation time or are open-loop systems (dilution) with a limited lifetime. To comply with the need for the required observation times, large bulky systems would be required with a long recycling time in combination with a JT pre-cooler. A continuous system therefore allows building smaller systems and sizing the pre-cooling chain to the average power dissipation, rather than to the peak power dissipation required by a single-shot system. The concept of a cooling system will be selected during the proposal evaluation and within the initial phase of the activity a conceptual design will be established based on resource budget (mass, volume, electrical power etc). In the second phase the most promising concept(s) shall be designed, manufactured and tested on breadboard level. To reduce as much as possible the interface problems between different types of coolers and refrigerator systems, efforts shall be put in designing a self standing, compact cryogenic system. The requirements of the cooler will be derived from the XEUS payload architecture study. Deliverables: Breadboard Cooler and associated technical documentation Current TRL: TRL2 Target TRL: TRL4 Application Need/Date: TRL5 by 2012 XEUS mission (launch >2015), FIRI Application/Mission: Contract Duration: mission (launch >2025) SW Clause : - Dossier0 Ref.: Consistency with Harmonisation Cryogenics Roadmap and Conclusions: 30 months Page 47 of 227
TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 2.3.1 - XEUS (Source: TRP 2000-2003) TRP Reference: Title: SCI-X10.a Superconducting Read Out for Microcalorimeters In the frame of the development of cryogenic instruments with large array sizes, as required to meet the science requirements, it is proposed to develop a low noise readout electronics, specifically tailored to x-ray microcalorimeter arrays. In this development program a low noise readout electronics based on a high bandwidth Super-Conducting Quantum Interference Device (SQUID) will be studied, in conjunction with a suitable multiplexing scheme. The main issues to be addressed include the design of the amplifier system, power requirements, noise performance and the thermal requirements of the amplifier readout. These issues will be studied theoretically and then validated against breadboard designs and models. Deliverables: Technical Note (design of the amplifier system with multiplexing scheme, power requirements, noise performance and the thermal requirements of the amplifier readout). Breadboard (+testing). Current TRL: TRL2 Target TRL: TRL3/4 Application Need/Date: TRL5 by 2010 Application/Mission: XEUS Contract Duration: 18 months SW Clause : - Dossier0 Ref.: T-682 Consistency with Harmonisation Roadmap and Conclusions: Not directly linked to harmonised technology. TRP Reference: SCI-X10.b Title: Superconducting Read Out for Superconducting tunnel junctions In the frame of the development of cryogenic instruments with large array sizes, as required to meet the science requirements, it is proposed to develop a low noise readout electronics for superconducting tunnel juncions. The electronics shall be based on high bandwidth Super-Conducting Quantum Interference Devices (SQUID) in conjunction with a suitable multiplexing scheme. The main issues to be addressed include the design of the amplifier system, power requirements, noise performance, reduction of channels through multiplexing and the thermal requirements of the amplifier readout. These issues will be studied theoretically and then validated against breadboard designs and models. Deliverables: Technical Note (design of the amplifier system including multiplexing topology, power requirements, noise performance and the thermal requirements of the amplifier readout). Breadboard (+testing). Current TRL: TRL2 Target TRL: TRL3/4 Application Need/Date: TRL5 by 2010 Application/Mission: XEUS Contract Duration: 18 months SW Clause : - Dossier0 Ref.: T-682 Consistency with Harmonisation Roadmap and Conclusions: Not directly linked to harmonised technology. Page 48 of 227
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