Thermal vacuum testing implies the use of radiative thermal shrouds.
Here follow a few examples of shroud design and manufacture by AMOS. Some are equipped with LN2 circulation and others with both LN2 and LHe circuits.
AMOS manufactures shrouds for liquid helium at 4K (-269°C).
These are flat containers made of thin stainless steel sheets to present a minimum thermal load.
These shrouds were used for the tests of the telescope of the ISO spacecraft (Infrared Space Observatory).
The thermal enclosure made by AMOS for the thermal tests of the ISO telescope is composed of two concentric layers.
The internal one is made of flat containers filled with liquid helium. The external one is made of the classic panels circulated by liquid nitrogen.
The hood is protected from the radiative transfer from the environment by a golden plated kapton sheet.
The ISO shroud was designed and manufactured following the specifications of IAL Space and AEROSPATIALE.
CUSTOMER : AEROSPATIALE - FRANCE
THERMAL SHROUDS SILEX LEO
For the tests of validation of the satellite SILEX, AMOS realized the thermal shrouds allowing to simulate the thermal environment around the terminal LEO (Low Earth Orbit).
The shroud is integrated inside the Focal V simulator of the Centre Spatial de Liège (CSL) and is compatible with the requirements of cleanliness class 100 and high vacuum.
CUSTOMER: MATRA MARCONI SPACE - FRANCE
AMOS made aluminium shrouds (simulator ETCA-SDT) or copper shrouds (for the measurement of the thermal balance of the payload HIPPARCOS) in which the coolant circulates in a tube welded to the panel. This system works from the liquid nitrogen temperature about -190C until more than 250C. The thermal shroud of HIPPARCOS consists of 10 panels with different temperatures.
The thermal shroud of the payload HIPPARCOS was realized according to the specifications of IAL SPACE (now CSL) and MATRA (now Astrium).
CUSTOMER: MATRA MARCONI SPACE - FRANCE
The thermal shroud consists of 5 copper thermal shrouds regulated independently.
Thermal Schrouds for CRYO-VIBRATION, PLANCK & SEVIRI
AMOS has been responsible for the design of an optical bench to be put inside a vacuum vessel for ISRO, Ahmedabad, India.
It consists in an optical bench (4 x 6m) that lies on 6 feet (these feet go through the wall of the vessel).
The lower part of those feet is put on a seismic block. This seismic block lies on air cushions in order to minimise the vibration transmission level on the upper surface of the optical bench.
Moreover, AMOS has been responsible for the design, manufacture and installation of a thermal tent (diam. 5.5m, length 4m) that covers the inner surface of the vessel. These panels and their support structure have been made by AMOS, tested in Belgium and then sent to India for final integration. This system allows to get a range of temperature from –170°C to +170°C.
The panels are double embossed walls of inox. They are painted on one side and electropolished on the other. Their dimension is +/- 1 x 3m.
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