Nuclear Physics and Atomic Energy

ядерна ф≥зика та енергетика
Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English, Russian
  Periodicity: 4 times per year

  Open access peer reviewed journal


 Home page   About 
Nucl. Phys. At. Energy 2019, volume 20, issue 1, pages 70-75.
Section: Engineering and Methods of Experiment.
Received: 02.09.2018; Accepted: 17.04.2019; Published online: 26.06.2019.
PDF Full text (en)
https://doi.org/10.15407/jnpae2019.01.070

Optimization and analysis of neutron distribution on 30 MeV cyclotron-based double layer beam shaping assembly (DLBSA)

Bilalodin1,2,*, G. B. Suparta1, A. Hermanto1, D. S. Palupi1, Y. Sardjono3, Rasito4

1 Department of Physics, Faculty of Mathematics and Natural Science, Gajah Mada University, Yogyakarta, Indonesia
2 Department of Physics, Faculty of Mathematics and Natural Science, Jenderal Soedirman University, Pur-wokerto, Indonesia
3 Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta, Indonesia
4 Center for Science and Applied Nuclear Technology, Bandung, Indonesia


*Corresponding author. E-mail address: bilalodin.unsoed@gmail.com

Abstract: Design and optimization of double layer Beam Shaping Assembly (DLBSA) has been conducted using the MCNPX code. The BSA is configured to comply with such a construction having typically a double moderator, a reflector, a collimator, and a filter. The optimization of various combinations of materials that compose the moderator, reflector, and filter yields such quality and intensity of radiation beams that conform to the requirements for Boron Neutron Capture Therapy. The composing materials are aluminum and BiF3 for moderator, lead and graphite for the reflector, nickel and polyethylene borate for the collimator, and iron and cadmium for the filter. Typical beam parameters measured at the exit of the collimator are epithermal neutron flux of 1.1 ⋅ 109 n/cm2 ⋅ s, the ratio of epithermal neutron flux to thermal neutron and fast neutron flux 344 and 85, respectively, and the values of fast neutron and gamma dose to epithermal neutron flux 1.09 ⋅ 10-13 Gy ⋅ cm2 and 1.82 ⋅ 10-13 Gy ⋅ cm2, respectively. Analysis of epithermal neutron flux and neutron beam spectrum using the PHITS code reveals that the distribution of epithermal neutron spreads out in the DLBSA. The highest intensity is found in the moderator and decline down-stream of the collimator and filter. The spectrum of neutron beams displays a narrow spike with that peaks at 10 keV.

Keywords: optimization of DLBSA, neutron particle distribution, MCNPX code, PHITS code.

References:

1. W.A.G. Sauerwein. Neutron Capture Therapy (New York: Springer, 2012). https://doi.org/10.1007/978-3-642-31334-9

2. H. Tanaka et al. Experimental verification of beam characteristics for cyclotron-based epithermal neutron source (CBENS). Applied Radiation and Isotopes 69(12) (2011) 1642. https://doi.org/10.1016/j.apradiso.2011.03.020

3. Y. Hashimoto, F. Hiraga, Y. Kiyanagi. Effects of proton energy on optimal moderator system and neutron-induced radioactivity of compact accelerator-driven 9Be(p, n) neutron sources for BNCT. Physics Procedia 60 (2014) 332. https://doi.org/10.1016/j.phpro.2014.11.045

4. A. Burlon et al. Design of a beam shaping assembly and preliminary modeling of a treatment room for accelerator-based BNCT at CNEA. Applied Radiation and Isotopes 69 (1) (2011) 1688. https://doi.org/10.1016/j.apradiso.2011.05.003

5. M. Monshizadeh et al. MCNP design of thermal and epithermal neutron beam for BNCT at the Isfahan MNSR. Progress in Nuclear Energy 83 (2015) 427. https://doi.org/10.1016/j.pnucene.2015.05.004

6. F.S. Rasouli, S.F. Masoudi. Design and optimization of a beam shaping assembly for BNCT based on D-T neutron generator and dose evaluation using a simulated head phantom. Applied Radiation and Isotopes 70(12) (2012) 2755. https://doi.org/10.1016/j.apradiso.2012.08.008

7. C. Dao-Wen et al. Designing of the 14 MeV neutron moderator for BNCT. Chinese Physics C 36(9) (2012) 905. https://doi.org/10.1088/1674-1137/36/9/020

8. M. Adib. Simulation study of accelerator based quasi-mono-energetic epithermal neutron beams for BNCT. Applied Radiation and Isotopes 107 (2016) 98. https://doi.org/10.1016/j.apradiso.2015.10.003

9. M. Asnal, T. Liamsuwan, T. Onjun. An Evaluation on the Design of Beam Shaping Assembly Based on the D-T reaction for BNCT. Journal of Physics: Conference Series 611 (2015) 012031. https://doi.org/10.1088/1742-6596/611/1/012031

10. Y. Kasesaz, H. Khala, F. Rahmani. Optimization of the beam shaping assembly in the D-D neutron generators-based BNCT using the response matrix method. Applied Radiation and Isotopes 82 (2013) 55. https://doi.org/10.1016/j.apradiso.2013.07.008

11. S.F. Masoudi, F.S. Rasouli. BNCT of skin tumors using the high-energy D-T neutrons. Applied Radiation and Isotopes 122 (2017) 158. https://doi.org/10.1016/j.apradiso.2017.01.010

12. International Atomic Energy Agency. Current Status of Neutron Capture Therapy (Vienna, 2001). Report

13. D.B. Pelowitz. MCNPXTM User Manual version 2.6.0. (Los Alamos National Laboratory report LA-CP-07-1473, 2008). https://www.mcnp.ir/admin/imgs/1354176297.2.6.0_Users_Manual.pdf

14. Y. Sato et al. Particle and Heavy Ion Transport code System, PHITS, version 2.52. Journal of Nuclear Science and Technology 50 (2013) 913. https://doi.org/10.1080/00223131.2013.814553

15. K. Ono. Experience of BNCT by KUR and start of clinical BNCT by small Cyclotron Based Neutron Generator in KURRI. Intern. Symp. the Application of Nuclear Technology to Support National Sustainable Development. 2015. Solotiga.

16. T. Mitsumoto et al. BNCT System Using 30 MeV H- Cyclotron. Procedings of Cyclotron. (2010) p. 430. https://accelconf.web.cern.ch/accelconf/Cyclotrons2010/papers/frm2cco04.pdf

17. S.V. Ivakhin et al. Modeling of Filters for Formation of Mono-Energetic Neutron Beams in the Research Reactor IRT MEPhI. In: Proc. of GLOBAL. Makuhari, Japan, 2011, paper No. 392341. Paper

18. C.W. Ma et al. Neutron-induced reactions on AlF3 studied using the optical model, Nuclear Instruments and Methods in Physics Research B 356-357 (2017) 42. https://doi.org/10.1016/j.nimb.2015.04.060

19. J.G. Fantidis. Optimised BNCT facility based on a compact D-D neutron generator. International Journal of Radiation Research 11(4) (2013) 207. http://ijrr.com/article-1-1100-en.html

20. Y. Osawa et al. Development of An Epithermal Neutron Field for Fundamental Researches for BNCT with A DT Neutron Source. EPJ Web of Conferences 153 (2017) 04008. https://doi.org/10.1051/epjconf/201715304008

21. F. Faghihi, S. Khalili. Beam shaping assembly of a DT neutron source for BNCT and its dosimetry simulation in deeply-seated tumor. Radiation Physics and Chemistry 89 (2013) 1. https://doi.org/10.1016/j.radphyschem.2013.02.003

22. D.A. Allen, T.D. Beynon. A design study for an accelerator-based epithermal neutron beam for BNCT. Phys. Med. Biol. 40 (1995) 807. https://doi.org/10.1088/0031-9155/40/5/007

23. J.C. Yanch et al. Accelerator-based epithermal neutron beam design for neutron capture therapy Med. Phys. 9(13) (1992) 709. https://doi.org/10.1118/1.596815