A new experimental method for estimation of α-particle induced hot spot size in Nb films is proposed. The method is based on the jump-like motion of Abrikosov vortices induced by the impact of a single α-particle (241Am 5.5 MeV) on a superconducting film. Preliminary experiments were carried out on a high quality “small” Nb−AlOx−Nb Josephson tunnel junction with circular geometry and area 2500 μm2 (length smaller than λj) at T=4.2 K. A preliminary value ofd *=2.5 μm is obtained for the dimension of the hot spot region.
Estimation of α-particle induced hot spot size in Nb film using Abrikosov vortices
PAGANO, Sergio;
1996-01-01
Abstract
A new experimental method for estimation of α-particle induced hot spot size in Nb films is proposed. The method is based on the jump-like motion of Abrikosov vortices induced by the impact of a single α-particle (241Am 5.5 MeV) on a superconducting film. Preliminary experiments were carried out on a high quality “small” Nb−AlOx−Nb Josephson tunnel junction with circular geometry and area 2500 μm2 (length smaller than λj) at T=4.2 K. A preliminary value ofd *=2.5 μm is obtained for the dimension of the hot spot region.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
