Abstract
The Bragg Crystal Spectrometer (BCS) is one of the instruments which makes up the scientific payload of the SOLAR-A mission. The spectrometer employs four bent germanium crystals, views the whole Sun and observes the resonance line complexes of H-like Fexxvi and He-like Fexxv, Caxix, and Sxv in four narrow wavelength ranges with a resolving power (λ/Δλ) of between 3000 and 6000. The spectrometer has approaching ten times better sensitivity than that of previous instruments thus permitting a time resolution of better than 1 s to be achieved. The principal aim is the measurement of the properties of the 10 to 50 million K plasma created in solar flares with special emphasis on the heating and dynamics of the plasma during the impulsive phase. This paper summarizes the scientific objectives of the BCS and describes the design, characteristics, and performance of the spectrometers.
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Acton, L. W., Culhane, J. L., Gabriel, A. H., Bentley, R. D., Bowles, J. A., Firth, J. G., Finch, M. L., Gilbreth, C. W., Guttridge, P., Hayes, R. W., Joki, E. G., Jones, B. B., Kent, B. J., Leibacher, J. W., Nobles, R. A., Patrick, T. J., Phillips, K. J. H., Rapley, C. G., Sheather, P. H., Sherman, J. C., Stark, J. P., Springer, L. A., Turner, R. F., and Wolfson, C. J.: 1980, Solar Phys. 65, 53.
Acton, L. W., Culhane, J. L., Gabriel, A. H., Wolfson, C. J., Rapley, C. J., Phillips, K. J. H., Antonucci, E., Bentley, R. D., Hayes, R. W., Joki, E. G., Jordan, C., Kayat, M., Kent, B. J., Leibacher, J. W., Nobles, R. A., Parmar, A. N., Strong, K. T., and Veck, N. J.: 1981, Astrophys. J. 244, L137.
Antonucci, E., Gabriel, A. H., and Dennis, B. R.: 1984, Astrophys. J. 287, 917.
Antonucci, E., Gabriel, A. H., Acton, L. W., Culhane, J. L., Doyle, C. J., Leibacher, J. W., Machado, M. E., Orwig, L. E., and Rapley, C. G.: 1982, Solar Phys. 78, 107.
Culhane, J. L., Gabriel, A. H., Acton, L. W., Rapley, C. G., Phillips, K. J. H., Wolfson, C. J., Antonucci, E., Bentley, R. D., Catura, R. C., Jordan, C., Kayat, M., Leibacher, J. W., McWhirter, P., Parmar, A. N., Sherman, J., Springer, L. A., Strong, K. T., and Veck, N. J.: 1981, Astrophys. J. 244, L141.
Doschek, G. A.: 1983, Solar Phys. 86, 9.
Doschek, G. A., Feldman, U., Kreplin, R. W., and Cohen, L.: 1980, Astrophys. J. 239, 725.
Doyle, J. G. and Bentley, R. D.: 1987, Astron. Astrophys. 155, 278.
Feldman, U., Doschek, G. A., Kreplin, R. W., and Mariska, J. T.: 1980, Astrophys. J. 241, 1175.
Fludra, A., Lemen, J. R., Jakimiec, J., Bentley, R. D., and Sylwester, J.: 1989, Astrophys. J. 344, 991.
Kondo, I.: 1982, Hinotori Symposium on Solar Flares, ISAS, Tokyo, p. 3.
Lin, R. P., Schwartz, R. A., Pelling, R. M., and Hurley, K. C.: 1981, Astrophys. J. 251, L109.
Rapley, C. G., Culhane, J. L., Acton, L. W., Catura, R. C., Joki, E. G., and Bakke, J. C.: 1977, Rev. Sci. Inst. 48, 1123.
Švestka, Z., Stewart, R. T., Hoyng, P., Van Tend, W., Acton, L. W., Gabriel, A. H., Rapley, C. G., Boelee, A., Bruner, E. C., de Jager, C., Lafleur, H., Nelson, G., Simnett, G. M., Van Beek, H. F., and Wagner, W. J.: 1982, Solar Phys. 75, 305.
Sylwester, J.: 1987, Artificial Satellites/Space Phys. 22, 17.
Sylwester, J., Lemen, J. R., and Mewe, R.: 1984, Nature 310, 665.
Tanaka, K.: 1987, Publ. Astron. Soc. Japan 39, 1.
Tanaka, K., Watanabe, T., Nishi, K., and Akita, K.: 1982, Astrophys. J. 254, L59.
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After the launch the name of SOLAR-A has been changed to YOHKOH.
Tragically Professor K. Tanaka died on January 2, 1990.
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Culhane, J.L., Hiei, E., Doschek, G.A. et al. The Bragg Crystal Spectrometer for SOLAR-A. Sol Phys 136, 89–104 (1991). https://doi.org/10.1007/BF00151696
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DOI: https://doi.org/10.1007/BF00151696