[en] The background of the superconducting Chacago cyclotron magnet is given. Stability considerations are presented with parameters itemized. Magnet testing and comparisons to calculations are described with figures showing testing data. Thermometry, LHe Consumption Rate and cryogenic system performance are presented with illustrative tables. Conclusions are listed, including comments concerning the economics involved. Substantial savings can be realized by conversion projects of this type. CCM will save 99% of the electrical power required to run the conventional magnet and about, $200,000 for each year of continuous operation

[en] This story is about two cyclotrons. The first was the one I helped build when I was a graduate student at Columbia; the second, I built with John Marshall at the University of Chicago after World War II. This is also a story about a graduate student who happened to be in the right place at the right time. In that sense it is an example of the opportunity that every graduate student can look forward to as a result of doing research on the frontiers of science, where the possibilities are endless. My own story had that kind of excitement. 9 refs., 21 figs

[en] This paper reports on the successful building of a support structure capable of high mechanical load and low heat leak. The structure contributed much to the achievement of the low LHe usage rate of the Chicago Cyclotron Magnet and therefore to the success of the project. The design of the single column is desbribed with a schematic drawing. Prototype testing is presented in terms of compression, testing, side loading, loading at an angle, slider, proof testing, and system performance during magnet testing. Column stresses are itemized and measurements given

[en] This paper reports that chemistry Section C-1 of the wartime Metallurgical Laboratory at the University of Chicago was charged with developing methods for the production of plutonium on the large industrial scale. Management techniques of Section C-1 and those of the Lawrence Radiation Laboratory, usually taken as an early example of Big Science, are contrasted. The staffing, organization, and planning of the scientific program of Section C-1 is described. Section C-1 serves as a model for the solution of large, complex scientific problems

[en] An account is given of some nuclear measurements that apparently had some importance in the early days of the nuclear chain reaction. These include measurements of the decay periods and the intensity of the delayed neutrons (important for the control of the chain reaction), and the first measurements relative to a fast-neutron chain reaction in uranium metal. The latter showed that normal uranium would have to be enriched by a factor of more than 12 in order to sustain a fast-neutron chain reaction in a finite geometry, and that high enrichment would be needed for a nuclear weapon. They also suggested to reactor theorists that the interaction fast effect might make an important contribution to a controlled slow-neutron chain reaction using natural water as moderator/coolant. (In the capable hands of others, this perception of the theorists led eventually to most of the civilian and naval power reactors.) Items of personal research are briefly mentioned, viz., observation of the radioactive decay of the free neutron, of nuclear recoil due to neutrino emission, and of the atomic consequences of radioactive decay. The periods covered are 1940-1944 with the Cyclotron Group at the Metallurgical Laboratory, Chicago, and 1944-1968 at Oak Ridge, Tennessee

[en] The charmonium chi states are observed in both π^- and p Be interactions near 200 GeV/c via their radiative decay into J/psi. The chi(3510) and chi(3555) are produced with roughly equal cross sections in π^- collisions while the chi(3555) dominates in p collisions. Simple gluon fusion can account for chi production with incident protons but additional mechanisms are needed for incident π^-