A new experimental method for estimation of alpha-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 alpha-particle (Am-241 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 mu m(2) (length smaller than lambda(j)) at T = 4.2 K. A preliminary value of d* approximate to 2.5 mu m is obtained for die dimension of the hot spot region.
Estimation of alpha-particle induced hot spot size in Nb film using Abrikosov vortices / V. G., Palmieri; R., Cristiano; L., Frunzio; C., Nappi; S., Pagano; V. N., Gubankov; M. P., Lisitskii; Pepe, GIOVANNI PIERO; I., Akoh; S., Takada; H., Nakagawa. - In: CZECHOSLOVAK JOURNAL OF PHYSICS. - ISSN 0011-4626. - STAMPA. - 46:(1996), pp. 2881-2882. [10.1007/BF02570427]
Estimation of alpha-particle induced hot spot size in Nb film using Abrikosov vortices
PEPE, GIOVANNI PIERO;
1996
Abstract
A new experimental method for estimation of alpha-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 alpha-particle (Am-241 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 mu m(2) (length smaller than lambda(j)) at T = 4.2 K. A preliminary value of d* approximate to 2.5 mu m is obtained for die dimension of the hot spot region.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
