A double-crystal monochromator for neutron stress diffractometry
Tóm tắt
The problem of developing a dedicated neutron diffractometer for placement on a horizontal reactor channel to measure internal stresses in bulk materials and components under conditions of a limited space is considered. It is shown that the use of a double-crystal monochromator composed of pyrolytic graphite and a focusing bent perfect silicon single crystal is the optimal solution to this problem. The diffractometer with such a monochromator that is installed at the IR-8 reactor of the National Research Center Kurchatov Institute is comparable in luminosity and resolution at a reactor power of 6 MW to modern stress diffractometers at more powerful reactors.
Tài liệu tham khảo
Hutchings, M.T., Withers, P.J., Holden, T.M., and Lorentzen, T., Introduction to the Characterization of Residual Stress by Neutron Diffraction, London Taylor and Francis, 2005. doi 10.1201/9780203402818
Withers, P.J., J. Appl. Cryst., 2004, vol. 37, no. 4, p. 596. doi 10.1107/S0021889804012737
Withers, P.J., J. Appl. Cryst., 2004, vol. 37, no. 4, p. 607. doi 10.1107/S0021889804012750
Santisteban, J.R., Daymond, M.R., James, J.A., and Edwards, L., J. Appl. Cryst., 2006, vol. 39, no. 6, p. 812. doi 10.1107/S0021889806042245
Nozik, Yu.Z., Ozerov, R.P., and Henning, K., Strukturmaya neitronografiya (Structural Neutronography), Moscow Atomizdat, 1979.
Pirling, T., Bruno, G., and Withers, P.J., Mater. Sci. Eng., A, 2006, vol. 437, no. 1, p.139. doi 10.1016/j. msea.2006.04.083
Hofmann, M., Schneider, R., Seidl, G.A., Rebelo-Kornmeier, J., Wimpory, R.C., Garbe, U., and Brokmeier, H.G., Physica B, 2006, vols. 385-386, part 2, p.1035. doi 10.1016/j.physb.2006.05.331
Kirstein, O., Garbe, U., and Luzin, V., Mater. Sci. Forum., 2010, vol. 652, p. 86. doi 10.4028/www.scientific.net/MSF.652.86
Lee, C., Moon, M., Em, V.T., Choi, E., Cheon, J., Nam, U., and Kong, K., Nucl. Instrum. Methods Phys. Res. Sect. A: Accel., Spectrom., Detect. Assoc. Equip., 2005, vol. 545, nos. 1-2, p. 480. doi 10.1016/j.nima. 2005.01.337
Mikula, P., Kulda, J., Lukáš, P., Vrána, M., and Wagner, V., Nucl. Instrum. Methods Phys. Res. Sect. A: Accel., Spectrom., Detect. Assoc. Equip., 1994, vol. 338, no. 1, p. 18. doi 10.1016/0168-9002(94)90156-2
Stoica, A.D., Popovici, M., Hubbard, C.R., and Spooner, S., Proc. Intern. Conf. on Residual Stresses (ICRS-6), Oxford, UK,2000, p. 1264.
Moon, M.K., Lee, C.H., Em, V.T., Mikula, P., Hong, K.P., Choi, Y.N., Cheon, J.K., Choi, Y.N., Kim, S.A., Kim, S.K., and Jin, K.C., Physica B: Condens. Matter, 2005, vol. 369, nos. 1-4, p. 1. doi 10.1016/j.physb.2005. 06.041
Entin, I.R., Glazkov, V.P., Moryakov, V.P., Naumov, I.V., Somenkov, V.A., and Shil’shtein, S.Sh., Instrum. Exp. Tech., 1976, vol. 19, no. 5, p. 1310.
Freund, A., Nucl. Instrum. Methods Phys. Res. Sect. A: Accel., Spectrom., Detect. Assoc. Equip., 1983, vol. 213, p. 495. doi 10.1016/0167-5087(83)90447-7
Šaroun, J., Nucl. Instrum. Methods Phys. Res. Sect. A: Accel., Spectrom., Detect. Assoc. Equip., 2004, vol. 529, sp. no., p. 162. doi 10.1016/j.nima.2004.04.197
Johnson, M.W. and Daymond, M.R., J. Appl. Cryst., 2002, vol. 35, no. 1, p. 49. doi 10.1107/S002188980101891X
Woo, W., Em, V.T., Seong, B.S., Mikula, P., Shin, E., Joo, J., and Kang, M., J. Appl. Cryst., 2011, vol. 44, no. 4, p. 747. doi 10.1107/S0021889811018899
http://www.ncnr.nist.gov/instruments/bt8/19
http://www.ansto.gov.au/ResearchHub/Bragg/Facilities/Instruments/