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INVESTIGATION OF THE SURFACE RESISTANCE OF SUPERCONDUCTING MATERIALS
JUNGINGER T. wydawnictwo: WYD PW , rok wydania 2012, wydanie I cena netto: 36.80 Twoja cena 34,96 zł + 5% vat - dodaj do koszyka Investigation of the Surface Resistance of Superconducting Materials
In particle accelerators superconducting RF cavities are widely used to achieve high
accelerating gradients and low losses. Power consumption is proportional to the surface
resistance RS which depends on a number of external parameters, including frequency,
temperature, magnetic and electric field. Presently, there is no widely accepted model
describing the increase of Rs with applied field.
In the frame of this project the 400MHz Quadrupole Resonator has been extended to 800 and
1200MHz to study surface resistance and intrinsic critical RF magnetic field of
superconducting samples over a wide parameter range, establishing it as a world-wide
unique test facility for superconducting materials.
Different samples were studied and it was shown that RS is mainly caused by the RF
electric field in the case of strongly oxidized surfaces. This can be explained by
interface tunnel exchange of electrons between the superconductor and localized states in
adjacent oxides. For well prepared surfaces, however, the majority of the dissipation is
caused by the magnetic field and RS factorizes into field and temperature dependent parts.
These different loss mechanisms were correlated to surface topography of the samples and
distribution of oxides by using ultrasonic force microscopy and X-ray photon spectroscopy.
144 pages, Papreback
Po otrzymaniu zamówienia poinformujemy,
czy wybrany tytuł polskojęzyczny lub
anglojęzyczny jest aktualnie na półce księgarni.
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