Research and development of a dedicated collimator for a 14.2 MeV fast neutron beam for imaging using a D-T generator

Date

May 30, 2012

Time

1:30 PM - 3:30 PM

Speaker

Dr. Iris Sabo-Napadensky

Language

de

Main Topic

Physik

Other Topics

Physik

Host

Andreas Wagner

Description

One of the main problems in neutron imaging is the scattered radiation that accompanies the direct neutrons that reach the imaging detectors and affect the image quality. We have developed a dedicated collimator for 14.2 MeV fast neutrons. The collimator optimizes the amount of scattered radiation to primary neutrons that arrive at the imaging plane. We have used different materials within the collimator in order to lower the scattered radiation that arrives at the scanned object. The image quality and the signal to noise ratios that are measured show that a mixture of BORAX (Na2B4O7•10H2O ) and water in the experimental beam collimator give the best results. We have used GEANT4 to simulate the collimator performance, the simulations predict the optimized material looking on the ratios of the scattered to primary neutrons that contribute in the detector. We present our experimental setup, report the results of the experimental and related simulation studies with neutrons beam generated by a 14.2 MeV D-T neutron generator.

Last modified: May 30, 2012, 9:35:08 AM