Document Type : Original Article
Authors
Department of Physics, Imam Hossein Comprehensive University, Tehran, Iran
Abstract
Guides play a key role in concentrating the neutron beam and increasing the flux for a neutron guide system. In this research, the role of a radius of curvature and length parameters on neutron intensity on the sample for the S-shape guide has been investigated and the results have been analyzed for three different types of geometry. In this work, the Monte Carlo simulation method is used with McStas software. The results show that at a constant radius with increasing length, the guide moves more towards bending and passes neutrons with less energy. Conversely, at a constant length with increasing radius, the guide gradually deviates from the curved state and it leads directly to the straight guide, all of the neutron energy spectra passes. A radius of curvature of 70 m and a length of 4 m were chosen for the S-shaped guide due to the passage of a larger range of thermal neutron fluxes. The guide radius can lead to a cut-off wavelength for neutrons. This guide can also eliminate fast neutrons and gamma rays..
Keywords
- V T Em, et al., Instruments and Experimental Techniques 60, 4 (2017) 526.
- M Adib, et al., Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 347 (2015) 58.
- K Z Lin, and V G Syromyatnikov, Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques 10, 4 (2016) 687.
- M Adib, et al., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 747 (2014) 87.
- C P Cooper-Jensen, et al., Journal of Physics: Conference Series 528, 1 (2014) 012005.
- F Cousin, and A Menelle, EPJ Web of Conferences 104 (2015) 01005.
- J Jackson Andrew, NIST Center for Neutron Research (2008) 1-24.
- R Pynn, Los Alamos Neutron Science Center, Los Alamos Science (1989).
- R Pynn, "Neutron scattering—a non-destructive microscope for seeing inside matter", In Neutron applications in earth, energy and environmental sciences, Springer, Boston, MA., (2009).
- A P Souza, et al., Journal of Instrumentation 15, 4 (2020) P04011.
- D F R Mildner, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 290, 1 (1990) 189.
- K Ikeuchi, et al., Journal of the Physical Society of Japan 82 (2013) SA038.
- A Houben, et al., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 680 (2012) 124.
- S Holm-Dahlin, et al., Quantum Beam Science 3, 3 (2019) 16.
- http://www.mcstas.org.
- K H Klen, et al., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 696 (2012) 75.
- K Lefmann, “Niels Bohr Institute”, University of Copenhagen (2007) 1.
- D M Rodriguez, D D DiJulio, and P M Bentley, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 808 (2016) 101.
- Y Wang, et al., Physics Procedia, 88 (2017) 354.
- H Jacobsen, et al., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 717 (2013) 69.
- C Zendler, D Nekrassov and K Lieutenant, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 746 (2014) 39.
- P Böni, In. Journal of Physics: Conference Series, 502, 1 (2014) 012047.
- A Hilger, et al. Optics express 23, 1 (2015) 301.
- K Lieutenant, and L D ussen, Journal of Neutron Research 18, 4 (2015) 127.
- P Cheng, et al., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 821 (2016) 17.
- T C Huang, et al., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 669 (2012) 14.
- L P de Oliveira, et al., Journal of Instrumentation 15, 01 (2020) P01012.
- https://indico.frm2.tum.de/event/51/contributions/859/attachments/162/209/IAEA_AUNIRA_Summer_School_Schillinger-Instrumentation_for_Neutron_Imaging.pdf.
- B Schillinger, Nondestructive Testing and Evaluation 16, 2-6 (2001) 141.
- A P Souza, et al., Journal of Instrumentation 15, 04 (2020) P04011.
- S Kennedy, R Robert and H Brett, JAERI-Conf (2001) JP0150507.
- D C Evans,"HFIR Thermal Neutron Beam Guide Hall Upgrade", (1997)1-94 Chancellor’s Honors Program Projects, https://trace.tennessee.edu /utk_chanhonoproj /212.
- O Kirstein, et al., In. Materials Science Forum 571 (2008) 213.
- E Farhi and P Willendrup, École thématique de la Société Française de la Neutronique 12 (2011) 303.
)