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 |
|---|---|
| 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 1 |
| Externally published | Yes |
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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
Cite this
Effects of spatial nonuniformity of superconducting-tunnel-junction ion detectors on mass spectroscopy. / Ohkubo, M.; Ukibe, M.; Saito, N.; Kushino, A.; Ichimura, Shingo; Friedrich, S.
In: IEEE Transactions on Applied Superconductivity, Vol. 15, No. 2 PART I, 01.06.2005, p. 932-935.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of spatial nonuniformity of superconducting-tunnel-junction ion detectors on mass spectroscopy
AU - Ohkubo, M.
AU - Ukibe, M.
AU - Saito, N.
AU - Kushino, A.
AU - Ichimura, Shingo
AU - Friedrich, S.
PY - 2005/6/1
Y1 - 2005/6/1
N2 - 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.
AB - 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.
KW - Mass spectroscopy
KW - Particle detectors
KW - Superconducting radiation detectors
KW - Superconductor-insulator-superconductor devices
UR - http://www.scopus.com/inward/record.url?scp=22044449345&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=22044449345&partnerID=8YFLogxK
U2 - 10.1109/TASC.2005.850126
DO - 10.1109/TASC.2005.850126
M3 - Article
AN - SCOPUS:22044449345
VL - 15
SP - 932
EP - 935
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2 PART I
ER -