Abstract
Spatial uniformity of superconducting tunnel junction detectors with a size of 200 μm is improved by increasing Al thickness of the Nb/Al proximized electrodes in an energy range of 5-10 keV. which is in the same order as an acceleration energy in time-of-flight mass spectroscopy (TOF-MS). It has been confirmed in the TOF experiments with Ta ions and Ta clusters that the proximized junction detectors clearly separate different ionic states and multi-hit events in impact energy spectra, and moreover can reveal the difference in ion species or ion-surface collision dynamics. However, a better spatial uniformity is not always good for TOF-MS, possibly because a detector with the thicker Al layers has a lower superconducting energy gap, which results in an improper detector operation because of a temperature rise due to heat radiation, or the states of the detector surfaces are different.
Original language | English |
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Pages (from-to) | 932-935 |
Number of pages | 4 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 15 |
Issue number | 2 PART I |
DOIs | |
Publication status | Published - 2005 Jun |
Externally published | Yes |
Keywords
- Mass spectroscopy
- Particle detectors
- Superconducting radiation detectors
- Superconductor-insulator-superconductor devices
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering