Details

Autor(en) / Beteiligte

• Maggi, S.
• De Leo, N.
• Lacquaniti, V.
• Agostino, A.
• Gonnelli, R.
• Verhoeve, P.

Titel

Nb/Al STJ detectors with sub-nA subgap current

Ist Teil von

• Physica. C, Superconductivity, 2006-03, Vol.435 (1-2), p.103-106

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2006

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Superconducting tunnel junctions (STJ) are promising high-resolution radiation detectors because of their larger energy resolution with respect to conventional Si-based detectors. We have developed a fabrication process for Nb/Al–AlOx/Nb STJ devices which produces junctions with subgap currents below 50pA at 300mK, a factor of 10−6 less than the subgap current at 4.2K. We report the details of the fabrication process and preliminary results on X-ray measurements at 300mK with a 5mC 55Fe source.