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

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
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