TY - JOUR
T1 - Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV
AU - Ohkubo, M.
AU - Ukibe, M.
AU - Zama, T.
AU - Ikeuchi, T.
AU - Katagiri, M.
AU - Ichimura, S.
N1 - Funding Information:
We would like to thank H. Pressler, D. Fukuda, T. Nakamura, P. Fons for experiments and discussion, and the SR members of AIST and KEK, especially H. Oyanagi, T. Kikegawa, and Y. Kitajima. This work was supported in part by the nuclear research program of MEXT.
PY - 2004/3/11
Y1 - 2004/3/11
N2 - It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10keV, and thus the detectors produce no clear total absorption peaks. Below 2keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100μm square junction has an intrinsic energy resolution of 5.4eV at 200eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range.
AB - It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10keV, and thus the detectors produce no clear total absorption peaks. Below 2keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100μm square junction has an intrinsic energy resolution of 5.4eV at 200eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range.
KW - Spatial profile
KW - Superconducting tunnel junction
KW - Synchrotron radiation
KW - X-ray spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=1642587725&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1642587725&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2003.11.331
DO - 10.1016/j.nima.2003.11.331
M3 - Article
AN - SCOPUS:1642587725
VL - 520
SP - 231
EP - 233
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 1-3
ER -