Zobrazeno 1 - 10
of 17
pro vyhledávání: '"I. D. Hepburn"'
Publikováno v:
Cryogenics. 50:647-652
A magnetoresistive heat switch has been developed to improve the performance of our flight-worthy cryogen-free ADR. We have characterised the switch's thermal conductivity in the temperature range 0.3-4 K under an applied magnetic field of 1.8 T for
Autor:
I. D. Hepburn, C. Brockley-Blatt, S. Milward, N. Rando, J. Reed, P. Coker, Berend Winter, Martin Linder, R. Stafford-Allen, M. Brownhill, G. Hardy, J. Bartlett, E. Crofts
Publikováno v:
Cryogenics. 50:582-590
This paper describes the design, development and performance of the engineering model double adiabatic demagnetization refrigerator (dADR) built and tested under contract to the European Space Agency for its former mission XEUS (now IXO). The dADR op
Autor:
Matthew Joseph Griffin, Peter A. R. Ade, Andrew E. Lange, I. D. Hepburn, Viktor Hristov, R. S. Bhatia, Peter Mason, Tom Bradshaw, J. J. Bock, B. P. Crill, A. H. Orlowska, Alain Benoit, A. D. Turner, A. G. Murray
Publikováno v:
Cryogenics. 39:701-715
Mechanical cryocoolers will be used to provide 4 K cooling for the HFI bolometer instrument in the Planck Surveyor mission for measurement of the anisotropies in the cosmic microwave background. They may also find application in future Earth-observin
Publikováno v:
Journal of Low Temperature Physics. 109:107-133
Cryogenic bolometric sensors made from epitaxially grown Si:As have been tested down to 40 mK. The sensors were grown by chemical vapour deposition with a doped layer 8.4 µm thick. The dopant concentration was measured using SIMS and was constant,
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 15:1477-1479
The proposed European Space Agency (ESA) XEUS mission will use an adiabatic demagnetization refrigeration (ADR) system to cool X-ray detectors to a temperature of less than 0.1 K. The superconducting magnet for the flight standard prototype is curren
Autor:
I. D. Hepburn, D. G. Vickers, W. D. Duncan, P. Hastings, Colin R. Cunningham, Jeffrey W. Beeman, Eugene E. Haller, W. S. Holland, Matthew Joseph Griffin, Peter A. R. Ade, T. Baillie, Walter Kieran Gear
Publikováno v:
International Journal of Infrared and Millimeter Waves. 17:669-692
We describe the design and construction of bolometric detectors for SCUBA - the Submillimetre Common-User Bolometer Array for the James Clerk Maxwell Telescope in Hawaii. The instrument contains 131 individual detectors, in two arrays, optimized for
Publikováno v:
Space Science Reviews. 74:215-223
Space worthy refrigeration capable of providing a 100 mK and below heat load sink for bolometric detectors will be required for the next generation of sub-millimetre space missions. Adiabatic demagnetisation refrigeration (ADR), being a gravity indep
Publikováno v:
SPIE Proceedings.
This paper describes the design of a continuously operating millikelvin cryocooler (mKCC) and its origins. It takes heritage from the double adiabatic demagnetization refrigerator (dADR) which was built for the European Space Agency (ESA). The compac
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 264:773-784
The first results are presented here of the Two-Micron Galactic Survey (TMGS). The TMGS is the most sensitive near-infrared survey of the Galactic plane yet attempted on a large scale. The Galactic plane has been drift-scanned in several regions over
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 310:244-248
Silicon bolometers are currently under development for milliKelvin operation; these devices are being produced using Si wafer fabrication technology. The design and performance of individual bolometers, using doped layers with a thickness in the rang