Design, testing and optimization of a neutron radiography system based on a Deuterium–Deuterium (D–D) neutron generator
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Simulations show that significant improvement in imaging performance can be achieved through collimator design for thermal and fast neutron radiography with a laboratory neutron generator. The radiography facility used in the measurements and simulations employs a fully high-voltage-shielded, axial D–D neutron generator with a radio frequency driven ion source. The maximum yield of such generators is about 1010 fast neutrons per seconds (E = 2.45 MeV). Both fast and thermal neutron images were acquired with the generator and a Charge Coupled Devices camera. To shorten the imaging time and decrease the noise from gamma radiation, various collimator designs were proposed and simulated using Monte Carlo N-Particle Transport Code (MCNPX 2.7.0). Design considerations included the choice of material, thickness, position and aperture for the collimator. The simulation results and optimal configurations are presented.
KeywordsThermal neutron radiography Fast neutron radiography D–D Neutron generator Monte Carlo simulation (MCNPX) Collimator CCD camera
This paper was developed under (IAEA TUN2003 project) “Installation of neutron activation analysis laboratory based on a neutron generator”. The authors would like to thank Dr. Fantidis G. and Dr. Nicolaou GE., from the University of Thrace, Xanthi, Greece for their help and also would like to thank the Radiation Safety Information Computational Center (RSICC) for providing the MCNP code.
- 1.Fischer CO, Stade J, Bock W (1997) In: Proceedings of fifth world conference on neutron radiography. June 17–20, 1996. Berlin, GermanyGoogle Scholar
- 3.Mishra KK (2005) Development of a thermal neutron imaging facility at the N.C. State University PULSTAR reactor. Ph.D. thesis. Faculty of North Carolina State University. USA, pp 108Google Scholar
- 6.Pelowitz DB (ed) (2011) MCNPX user’s manual, version 2.7.0. Los Alamos National Laboratory Report LA-CP-11-00438, April 2011Google Scholar
- 7.http://www.adelphitech.com. Accessed January 2009
- 8.Reijonen J (2005) Compact neutron generators for medical home land security and planetary exploration. In Proceedings of the 2005 IEEE particle accelerator conference (PAC 05). 16–20 May 2005, Knoxville, Tennessee. 21st IEEE Particle accelerator conference, p. 49Google Scholar
- 9.Popov V, Degtiarenko P, Musatov I (2010) New detector for use in fast neutron radiography, 12th International workshop on radiation imaging defectors, July 11–15 2010, Robinson College, Cambridge, UK, Published by IOP Published for SISSAGoogle Scholar
- 10.Patil BJ, Chavan ST, Pethe SN, Krishnan R (2011) Collimator design for 15 MeV linear accelerator based thermal neutron radiography facility. Proceedings of particle accelerator conference, New York, NY, USA, from March 28 to April 1, 2011Google Scholar
- 11.Domanus JC (1987) Collimators for thermal neutron radiography: an overview. D. Reidel Publishing Company. http://www.worldcat.org
- 12.Hawkesworth MR (1977) Neutron radiography: equipment and methods. At Energy Rev 15(2):169–220Google Scholar
- 13.Barton JP (1967) Material Evaluation 25:45A–46AGoogle Scholar
- 23.Bucherl T, Kutlar E, Von Gostomski C L, Calzada E, Pfister G, Koch D (2004) Radiography and tomography using fission neutrons at FRM-II. Appl Radiat Isot 61:537Google Scholar