Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2011-04-19
2011-04-19
Souw, Bernard E (Department: 2881)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
C250S370010, C378S005000, C378S006000
Reexamination Certificate
active
07928400
ABSTRACT:
A detection system for wavelength-dispersive and energy-dispersive spectrometry comprises an X-ray detector formed from a solid-state avalanche photodiode with a thin entrance window electrode that permits the efficient detection of X-rays scattered from “light” elements. The detector can be tilted relative to the incident X-rays in order to increase the detection efficiency for X-rays scattered from “heavy” elements. The entrance window may be continuous conductive layer with a thickness in the range of 5 to 10 nanometers or may be a pattern of conductive lines with “windowless” areas between the lines. A signal processing circuit for the avalanche photodiode detector includes an ultra-low noise amplifier, a dual channel discriminator, a scaler and a digital counter. A linear array of avalanche photodiode detectors is used to increase the count rate of the detection system.
REFERENCES:
patent: 4535245 (1985-08-01), Zonneveld et al.
patent: 5345083 (1994-09-01), De Koning
patent: 7767975 (2010-08-01), Flamanc et al.
patent: 2007/0272872 (2007-11-01), Joshkin et al.
patent: 2009/0140153 (2009-06-01), Flamanc et al.
patent: 2010/0102242 (2010-04-01), Burr et al.
Radeka, Veljko, “CCD and CMOS Imaging Devices for Large (Ground Based) Telescopes”, Proceedings of the International Symposium on Detector Development for Particle, Astroparticle and Synchrotorn Radiation Experiments (SNIC 2006), Apr. 3-6, 206, Standord, California, US.
Ogasawara, et al., “The Effect of Depletion Layer Thickness in Avalanche Photodiodes for Measurement of Low-Energy Electrons”, Nuclear Instruments and Methods in Physics Research, Secton A 566, 2006, pp. 575-583.
Kataoka, et al., “Performance of the Most Recent Avalanche Photodiodes for Future X-Ray and Gamma-Ray Astronomy”, SPIE, 2004, vol. 5501, pp. 249-260.
Moszynski, et al., “Large Are Avalance photodiodes in Scintillation and X-Ray Detection”, Nuclear Instrutments and Methods in Physics Research, Section A 485, 2002, pp. 504-521.
Diawara Yacouba
Durst Roger D.
Lesher Donald P.
Medved Sergei A.
Sedov Vladislav N.
Bruker AXS Inc.
Law Offices of Paul E. Kudirka
Souw Bernard E
LandOfFree
X-ray detection system for wavelength dispersive and energy... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with X-ray detection system for wavelength dispersive and energy..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray detection system for wavelength dispersive and energy... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2697407