Title :
X-ray single photon 1-D imaging spectrometers
Author :
Li, L. ; Frunzio, L. ; Wilson, C. ; Segall, K. ; Prober, D.E. ; Szymkowiak, A.E. ; Moseley, S.H.
Author_Institution :
Dept. of Appl. Phys., Yale Univ., New Haven, CT, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
We have developed superconducting single-photon 1-D imaging X-ray detectors with an energy resolution of 13 eV FWHM at 6 keV and 1-D spatial resolution of 0.25 μm over a length of 20 μm in an effective area of 20×100 μm2. The energy resolution along the 200 μm long absorber is 36 eV. The energy resolution of 13 eV is among the best reported for this kind of detectors and is within factor of 2 of its theoretical limit. The signals are read out by low-noise current amplifier with a dc voltage bias. The electronic noise measured by injecting pulses is 8 eV FWHM at 6 keV. By cooling the feedback resistor the current noise is reduced from 160 fA/Hz1/2 to 90 fA/Hz1/2
Keywords :
X-ray detection; X-ray imaging; X-ray spectrometers; superconducting device noise; superconducting junction devices; superconducting particle detectors; superconductive tunnelling; 6 keV; X-ray detector; current noise; electronic noise; energy resolution; feedback resistor; single photon one-dimensional imaging spectrometer; spatial resolution; superconducting tunnel junction; Energy resolution; Low-noise amplifiers; Optical imaging; Pulse amplifiers; Pulse measurements; Spatial resolution; Spectroscopy; Superconducting device noise; X-ray detectors; X-ray imaging;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
