Showing papers on "Shields published in 1967"
Patent•
06 Jun 1967
44 citations
TL;DR: In this paper, a Fortran program has been written for the optimum design of light shields for Cassegrain optical systems with finite field, and the techniques employed are described, and results are shown.
Abstract: A Fortran program has been written for the optimum design of light shields for Cassegrain optical systems with finite field. The techniques employed are described, and results are shown.
19 citations
Patent•
28 Aug 196718 citations
Patent•
19 Sep 196717 citations
01 Jan 1967
TL;DR: In this paper, the thermal performance of a multilayer insulation system at high vacuum is directly dependent upon the surface emittance of its radiation shields, which is related to the metal used for the shields and the metal purity, as well as the products formed at the surfaces due to chemical reactions of the metal with the environment.
Abstract: The thermal performance of a multilayer insulation system at high vacuum is directly dependent upon the surface emittance of its radiation shields. This emittance is related to the metal used for the shields and to the metal purity, as well as to the products formed at the surfaces due to chemical reactions of the metal with the environment. Where shields are formed by metal coatings on substrate films, the thickness of the coating affects the emittance and establishes the portion of incident radiation which is transmitted through the shield material.
11 citations
9 citations
8 citations
TL;DR: In this paper, an analog approach to the calculation of the efficiency of such nonideal cylindrical superconducting shields is presented, in most cases, the problem reduces to a 2-dimensional Laplace equation with given boundary conditions.
Abstract: The low-field diamagnetism of superconductors has often been used to design quasi-ideal magnetic circuits, especially for traveling wave maser (TWM) magnets. An analogical approach to the calculation of the efficiency of such nonideal cylindrical superconducting shields is presented. In most cases, the problem reduces to a 2-dimensional Laplace equation with given boundary conditions. The logarithmic complex potential \log (Bx - iBy) has been used to obtain the field homogeneity and disorientation. Partially penetrated shields may be replaced by perfect equivalent ones. The analog measurements on conducting paper permit quick iterations of the solution. Various field component measurements have been done on TWM magnets using bismuth thin film Hall probes and found to be in good agreement with the analog measurements.
Patent•
01 Jan 1967
TL;DR: A thermal shield for a nuclear reactor is made of a cast iron having the following percentage composition as discussed by the authors, which is the same percentage composition as the thermal shield of a nuclear power plant.
Abstract: A thermal shield for a nuclear reactor is made of a cast iron having the following percentage composition:-
TL;DR: In this article, the build-up of moderated neutrons (E < 1 MeV) during the passage of high energy neutrons in iron and iron-water mixtures was determined experimentally and by calculation.
TL;DR: In this article, the angular energy distributions of fast neutrons beyond iron shields were measured and the experimental results were compared with calculation by the Monte Carlo method and with multi-group calculations by the "transmission matrix" method in the 2 P 7 approximation.