Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Adam Woodcraft"'
Publikováno v:
Cryogenics. 50:465-468
Woven Nomex® ribbon cables made up with superconducting niobium–titanium wire are used at millikelvin temperatures in many large cryogenic instruments. It is important to know how much heat in transmitted down such cables. However, the conductivit
Publikováno v:
Cryogenics. 50:66-70
Tecamax® SRP (self-reinforced polyphenylene) is a new commercially available amorphous polymer which is suitable for use at cryogenic temperatures. It has a high tensile strength (210 MPa at room temperature), resulting from the molecular structure
Autor:
Matthew I. Hollister, Wayne S. Holland, David C. Gostick, Fred Gannaway, Dan Bintley, Adam Woodcraft
Publikováno v:
Cryogenics. 49:504-513
Various research fields require large and complex instrumen ts containing detectors operating at millikelvin temperatures. The materials and techniques traditionally used in cryogenics are often unsuitable for the demanding requirements of such instr
Autor:
Adam Woodcraft, Matthew I. Hollister
Publikováno v:
Cryogenics. 49:371-375
Recent development of “dry” dilution refrigerators has used mechanical cryocoolers and Joule–Thomson expansion stages to cool and liquefy the circulating ^3He. While this approach has been highly successful, we propose three alternative designs
Autor:
Adam Woodcraft
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 604:30-33
Sub-mm astronomy has seen an explosive growth in recent years. This has been driven by improvements in detector technology, and in particular the move from single pixel photometric instruments to ones containing arrays of hundreds and even thousands
Autor:
Adam Woodcraft, Lara Risegari, G. Ventura, L. Lolli, V. Martelli, Peter Hastings, Marco Barucci
Publikováno v:
Cryogenics. 49:159-164
Pitch-bonded graphites are among the best known thermal insulators at sub-kelvin temperatures, but are very good conductors at higher temperatures. This makes them ideal for mechanical supports which must provide good thermal isolation at an operatin
Publikováno v:
Cryogenics. 47:333-342
We present thermal conductance measurements of different types of bolted joint at sub-Kelvin temperatures. Joints containing sapphire surfaces provided good thermal isolation; the mechanism appears to be the existence of a very small area over which
Autor:
Xu Hongxin, Stuart Froud, Peter A. R. Ade, Carole Tucker, Xie Zhenchao, A. Hornsby, Jiang Lifei, Adam Woodcraft, Stephen M. Hanham, William J. Otter, Richard Wylde, Kevin J. Pike
Publikováno v:
2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).
We have developed a low-loss quasi-optical multiplexer (QOM) for future space-based meteorological radiometry covering nearly a decade of frequencies — from 54 GHz to 425 GHz. We have shown that very low loss can be combined with high channel co-al
Autor:
Adam Woodcraft
Publikováno v:
Cryogenics. 45:626-636
The thermal conductivity of pure aluminium at cryogenic temperatures varies by many orders of magnitude depending on purity and treatment, and there is little information in the literature on the likely values to be obtained for samples of a given pu
Autor:
Adam Woodcraft
Publikováno v:
Cryogenics. 45:421-431
Aluminium alloys are being used increasingly in cryogenic systems. However, cryogenic thermal conductivity measurements have been made on only a few of the many types in general use. This paper describes a method of predicting the thermal conductivit