Abstract
In Canada, during the autumn of 1942, a group of physicists, chemists and engineers were assembled to work on what was to become the Canadian atomic energy project. The base for this work was Montreal. This paper concentrates on the contributions of a sub-group of those scientists, namely those working on the development of nuclear reactor theory. The members of that group comprised an international mix of Canadians, Britons and Americans. A few already had international reputations as theoretical physicists, but the majority were young men and women, generally under the age of 30, who were very talented but not yet famous. They worked under conditions of the utmost secrecy, initially with little help from the United States, and developed virtually from first principles most of the important aspects of modern reactor theory. The results of their work were issued as Canadian National Research Council reports with the prefix MT (Montreal Theory), and between 1943 and 1946 about 80 such reports were written. The theory described therein was fundamental to the later design and construction of the Canadian NRX reactor, which was a very successful research tool. Soon after the end of World War II, a few of the MT reports were written up and published in either the Physical Review or the Canadian Journal of Research. However, more than 80% of the work was not published and therefore did not receive the formal recognition that it deserved. A few of the reports that went unpublished were so important that one wonders why they never appeared in the learned journals. To be sure, the work they contained was certainly used world-wide and the reports cited. However, human nature being what it is, after some years the original sources were forgotten and only the published papers which cited them were quoted. After a while those classic, early MT reports seem to have faded from memory. Thus it was that, when I recently tried to find one of them to check on a particular matter (in fact it was a paper by George Volkoff on the Wiener-Hopf technique) 1 found extreme difficulty in locating it. The work presented here describes the problems I met in tracking down, not only the Volkoff paper, but many of the others too. It was this difficulty which persuaded me that the MT reports should, after nearly 60 years, receive their due recognition. I am doing that by reprinting here the abstracts of all of the relevant reports, which some personal comments regarding their importance or historical value. In addition, where possible, I am publishing short biographies of the major players in Montreal during the period 1943–1946, thereby demonstrating how those young people's careers developed in the post-war years. Many went on to receive high scientific honours and academic prestige. In order to put the articles in context, I have also reproduced the abstracts of some British Ministry of Supply reports which were written in the early part of the war (1940–1942), and which are relevant because several of the British scientists involved subsequently found themselves in Montreal. To give some background to the early Canadian work, I have reprinted part of an article by George Laurence (First Head of the Canadian Atomic Energy Control Board) who was an early contributor to research in neutron chain reactors, and whose enthusiasm and talent undoubtedly contributed to the decision to start the atomic energy project in Canada. Over the next few years, this journal or its companion, Annals of Nuclear Energy, will publish a selection of the more important MT reports so that they will be readily accessible to scholars and to practising nuclear engineers. One of these reports, written in 1944 by Boris Davison and which is of seminal value, is reproduced in this issue with kind permission of Atomic Energy of Canada Ltd.
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