An improved iron core magnet for general laboratory use, weighing two tons, has been designed and several units have been constructed. The design incorporates the desirable features of a number of earlier magnets and is engineered to give the optimum utility with minimum space and weight and with minimum attention by the operating personnel. A summary of test performance at 20 kw is given below. Operation at higher power levels will be described in Part II. 11−in. diameter poles 5−in. gap10 kilogauss 2−in. gap17 kilogauss.534−in. diameter poles 2−in. gap23 kilogauss 1−in. gap30 kilogauss.1−in. diameter poles 1−in. gap32 kilogauss 12−in. gap37 kilogauss 14−in. gap42 kilogauss.
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Bitter et al. (1951) studied this question.
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