In the past F. Finkbeiner has collaborated on articles with M. Scherschel. One of their most recent publications is Superconducting aluminium tunnel junctions with indium absorbers for low-energy X-ray spectroscopy. Which was published in journal Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.

More information about F. Finkbeiner research including statistics on their citations can be found on their Copernicus Academic profile page.

Superconducting aluminium tunnel junctions with indium absorbers for low-energy X-ray spectroscopy

AbstractWe report here on studies of the preparation of and on measurement with an absorber-type tunnel junction detector (Al/Al2O3/Al/In) suitable for low-energy X-ray spectroscopy. With a 55Fe source of 6 keV the energy resolution was determined to be 3.3% at a temperature of 276 mK. The experiments indicate that mainly phonons with E ≥ 2ΔAl, generated in the indium absorbers, contribute to the observed detector signals.

Superconducting strip detectors as position sensitive particle detectors

AbstractThe feasibility of using of current-biased superconducting strips for radiation detection is investigated. Narrow Ta strips are exposed to 5.5 MeV α-particle radiation and the rise-time of the induced voltage pulses is measured as function of temperature and bias current. The rise-time of the voltage signal strongly depends on the site on the strip which is hit by the α-particle. In order to determine the spatial resolution of a superconducting strip detector, position-sensitive measurements were performed. The maximum lateral resolution estimated so far is 25μm in a 7μm wide, 340 nm thick and 0.6 mm long Ta-strip.