Abstract
We represent the results of studies on noise-generating sources in glass-fibers reinforced plastic (G-FRP) Dewars as the provision units of operation environment for Superconducting Quantum Interference Detectors (SQUID). Techniques of noise suppression to a level admissible in up-date biomagnetic investigations are proposed. Novel concepts of combined thermal radiation shield and low-magnetic FRP structures reduce the level of proper noise for such Dewars to be ∼5 fT/Hz1/2. Detailed studies on penetrating of gaseous helium are undertaken for various composited materials of Dewar parts. The developed combined FRP structures for Dewar necks demonstrated that diffusion coefficient of gaseous helium can be lowered by 30−100 times in comparison with that for traditional FRP materials.
Similar content being viewed by others
References
Koch, H., Cantor, R., Drun, D., et al., IEEE Trans. Magn., 1991, vol. 27, p. 2792.
Ahonen, A.L., Hamamainen, M.S., Kajola, M.J., et al., IEEE Trans. Magn., 1991, vol. 27, p. 2786.
Fujioka, K., Watanabe, T., Mizobuchi, K., et al., Biomagnetism’87, Tokyo: Denki University Press, 1988, p. 466.
Varpula, T. and Poutanen, T., J. Appl. Phys., 1984, vol. 55, p. 4015.
Nenonen, J., Katila, T., and Montonen, J., Advances in Biomagnetism, New York: Plenum, 1989, vol. 4, p. 729.
Lyakhno, V.Yu., Melnik, S.I., Fomenko, Yu.V., and Shnyrkov, V.I., Radiotekhnika, Kharkov: KhNURE, 2007, vol. 150, p. 159.
Kasai, N., Sasaki, K., Kikyu, S., and Suzuki, Y., Cryogenics, 1993, vol. 33, no. 2, p. 175.
Scurlock, R.G. and Saull, B., Cryogenics, 1976, vol. 16, no. 5, p. 303.
Reitlinger, S.A., Permeability of Polymer Materials, Moscow: Chemistry, 1974.
Shnyrkov, V.I., Zinovyev, P.V., and Zheltov, P.N., Proc. of 13-th Intern. Confer, on Biomagnetism BIOMAG 2002, Berlin: VDE Verlag GMBH, 2002, p. 955.
Barat, S.L., Narayankhedkar, K.G., and Lukose, T.P., Cryogenics, 1990, vol. 30, no. 8, p. 711.
Price, J.W., Adv. Cryogen. Eng., 1968, vol. 13, p. 662.
Davydenkov, I.A., Milman, S.B., Velikanova, M.G., et al., Cryogenics, 1993, vol. 33, no. 12, p. 1137.
Altemose, V.O., J. of Appl. Phys., 1961, vol. 32, no. 7, p. 1309.
Barrer, R.M. and Skirrow, G.J., Polymer Science, 1948, vol. 3, no. 4, p. 549.
Author information
Authors and Affiliations
Additional information
Original Russian Text © V.Yu. Lyakhno, A.S. Garbuz, L.V. Gnezdilova, A.V. Lopin, V.I. Shnyrkov, 2009, published in Pribory i Tekhnika Eksperimenta, 2009, No. 5, pp. 150–155.
Rights and permissions
About this article
Cite this article
Lyakhno, V.Y., Garbuz, A.S., Gnezdilova, L.V. et al. Parameters optimization of the FRP Dewar intended for biomagnetic investigations. Instrum Exp Tech 52, 752–757 (2009). https://doi.org/10.1134/S0020441209050212
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0020441209050212