Microwave Loss Reduction in Cryogenically Cooled Conductors
| Autor: | Anthony R. Kerr, Ricardo Finger |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Passivation FOS: Physical sciences chemistry.chemical_element Brass chemistry.chemical_compound Aluminium Electrical and Electronic Engineering Composite material Instrumentation and Methods for Astrophysics (astro-ph.IM) Instrumentation Electrical conductor Condensed Matter - Materials Science Radiation Benzotriazole Materials Science (cond-mat.mtrl-sci) Condensed Matter Physics Copper Atomic and Molecular Physics and Optics Residual resistivity chemistry visual_art visual_art.visual_art_medium Skin effect Astrophysics - Instrumentation and Methods for Astrophysics |
| Zdroj: | International Journal of Infrared and Millimeter Waves. 29:924-932 |
| ISSN: | 1572-9559 0195-9271 |
| DOI: | 10.1007/s10762-008-9394-1 |
| Popis: | Measurements of microwave attenuation at room temperature and 4.2 K have been performed on some conductors commonly used in receiver input circuits. The reduction in loss on cooling is substantial, particularly for copper and plated gold, both of which showed a factor of 3 loss reduction. Copper passivated with benzotriazole shows the same loss as without passivation. The residual resistivity ratio between room temperature and 4.2 K, deduced from the measurements using the classical skin effect formula, was smaller than the measured DC value to a degree consistent with conduction in the extreme anomalous skin effect regime at cryogenic temperatures. The measurements were made in the 5-10 GHz range. The materials tested were: aluminum alloys 1100-T6 and 6061-O, C101 copper, benzotriazole treated C101 copper, and brass plated with electroformed copper, Pur-A-Gold 125-Au soft gold, and BDT200 bright gold. Comment: 9 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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