By Topic

Novel digital K-edge imaging system with transition radiation from an 855-MeV electron beam

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

22 Author(s)
Hagenbuck, F. ; Inst. fur Kernphys., Johannes Gutenberg Univ., Mainz, Germany ; Backe, H. ; Clawiter, N. ; Euteneuer, H.
more authors

A novel K-edge imaging method has been developed at the Mainz Microtron MAMI aiming at a very efficient use of the transition radiation (TR) flux generated by the external 855-MeV electron beam in a foil stack. A fan-like quasi-monochromatic hard X-ray beam is produced from the ±1-mrad-wide TR cone with a highly oriented pyrolytic graphite (HOPG) crystal. The absorption of the object in front of a 30 mm×10 mm pn charge-coupled device (pn-CCD) photon detector is measured at every pixel by a broad-band energy scan around the K-absorption edge. This is accomplished by a synchronous variation of the lateral crystal position and the electron beam direction which defines also the direction of the TR cone. The system has been checked with a phantom consisting of a 2.5-μm thick molybdenum sample embedded in a 136- or 272-μm-thick copper bulk foil. A numerical analysis of the energy spectrum for every pixel demonstrates that data as far as ±0.75 keV away from the K edge of molybdenum at 20 keV still improve the signal-to-noise ratio (SNR). Prospects are discussed to investigate the human lungs with xenon as a contrast agent at the available total primary photon flux of 2×1010/(s·0.1% bandwidth (BW)) only

Published in:

Nuclear Science, IEEE Transactions on  (Volume:48 ,  Issue: 3 )