Josephson device for simultaneous time and energy detection

Autor:	Emanuela Esposito, Mikkel Ejrnaes, R. Cristiano, Sergio Pagano, D. Perez de Lara
Rok vydání:	2003
Předmět:	Superconductivity Physics Discriminator Physics and Astronomy (miscellaneous) Spectrometer business.industry Detector Analytical chemistry Mass spectrometry Optics Condensed Matter::Superconductivity Calibration Time-of-flight mass spectrometry business Energy (signal processing)
Zdroj:	Applied Physics Letters. 82:2109-2111
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1564297
Popis:	The development of a detection device for simultaneous measurement of energy and impact time, to be used in time-of-flight mass spectrometry, is reported. In this device, two superconducting tunnel junctions are coupled through a passive network. The first junction operates in the quasiparticle regime in order to measure the energy of a molecule impact and to act as a proportional detector. The second one operates in the Josephson regime in order to act as a fast discriminator for the impact time of a molecule impinging on the detector junction. In this way, a very accurate time determination can be achieved limited only by the intrinsic detector response, thus improving the spectrometer mass resolution. To demonstrate the feasibility of this detection scheme in mass spectrometry, calibration measurements have been carried out using a 55Fe x-ray source to simulate the molecule impact. The experimental results successfully demonstrated simultaneous detection of energy and arrival time in coincidence with p...
Databáze:	OpenAIRE
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