No coin nor oath required. For personal study only.
Electronic physicists and engineers interested in the subject of fundamental phenomena will be delighted with the wealth of theoretical and experimental data. In a subject so new and so pressing at the time it is no small wonder that the Radiation Laboratory was interested primarily in experimental devices for studying arc phenomena, and their relationship to the various diffusion processes for the uranium compounds.
Most of the eleven chapters in the book describe in detail experiments and results of experiments, many of which were new and never before reported in the literature. The introductory chapter, providing a unifying framework for the rest of the book, develops a general qualitatiw~ theory for the internal state of an arc in a magnetic field of strength to 10,000 gauss, although most experimental work was done at about 3000 gauss. This is followed by a chapter on the experimental use of probes for plasma exploration, modifying the theory of the Langmuir-type probe to make it applicable to the arc in a magnetic field. The idea of following theory by experiment is carried out in the discussion pertaining to the required minimum pressure for stable arc operation. The pressure limitation is found necessary to supply sufficient ions to the filament to satisfy the Langmuir condition at the double sheath. Good agreement with theory is obtained for the case's of argon, helium, and sulfur hexafluoride. Similar agreement with newly developed theory is obtained in the experiments to measure the absolute values of cross-section for ionization of uranium tetrafluoride, and the ionization and dissociation of uranium tetrafluoride and uranium hexafluoride by homogeneous electron impact.
Detailed descriptions of experiments, and apparatus and the results of experiments with changing conditions of pressure, magnetic field, arc conditions, geometry, and other factors close the book.
While not intended as a text book, this volume, offering so much to the basic scientist, should be useful as a professional reference text. While references to the literature are few, this is quite understandable in view of the pioneering work which is described.
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