Wide-band imaging spectrometer with scintillator-deposited charge-coupled device

Details Wide-band imaging spectrometer with scintillator-deposited charge-coupled device Wide-band imaging spectrometer with scintillator-deposited charge-coupled device

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006nimpa.568..149m&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 568, Issue 1, p. 149-152.

Physics

1

Scientific paper

We report on a new photon-counting detector possessing unprecedented spatial resolution and moderate spectral resolution for 0.1 100keV X-rays. It consists of an X-ray charge-coupled device (CCD) and a scintillator. The scintillator is directly coupled to the back surface of the X-ray CCD. Low-energy X-rays below 10 keV can be directly detected by the CCD. The majority of hard X-rays above 10 keV pass through the CCD but can be absorbed by the scintillator, generating visible light photons. Since CCDs have a moderate detection efficiency, visible light photons can be detected by the CCD. We coupled the needlelike CsI(Tl) on the front surface of the back-illuminated (BI) CCD. We evaluated the spectroscopic performance for hard X-rays at the synchrotron facility, SPring-8, and found a good linear relationship between the incident X-ray energy and the pulse height up to 80 keV. The on-axis image of the hard X-ray telescope, supermirror, was measured by our device at 40 keV. A sharp core and the wing structure can be clearly imaged and high imaging capability of the SD-CCD can be demonstrated.

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