P. T. Demos

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We report a case of superficial ulcerating rheumatoid necrobiosis (SURN), which is a recently described cutaneous manifestation of severe rheumatoid arthritis. As with classic rheumatoid nodule, there is evidence that this lesion may result from a vasculitis. SURN appears to represent a form of "perforating" rheumatoid nodule, and completes a triad of major(More)
The Accelerator Tube Three one-foot sections, each containing 6 irises, have been completed fastened together evacuated, and attached to three magnetrons The unloaded Q of the resultant cavity is approximately 18,000 in very good agreement with expectations The future cavity sections will be constructed identically as the present sections final dimensions(More)
Status of Construction Ten one-foot sections of the accelerating cavity are essentially finished, and the vacuum manifold for the ultimate 20-foot length is completed Two alternative power supplies for feeding the 20 magnetrons are in the final stages of construction One of these is a d-c system powered by a motor-generator set which will give a variable(More)
Since the last report it has been possible to test 12 feet of the microwave accelerator, to make certain necessary modifications as a result of these tests,and to show that the behavior of the microwave components is completely satisfactory. This leaves unfinished only the test of actually putting electrons through the cavities. We have also done some(More)
Instability growth rates and thresholds have been calculated for the MIT-Bates South Hall Ring. Both single bunch and coupled bunch instabilities have been investigated. For single bunch effects, a broad-band impedance budget has been developed. Numerical estimates of the impedances of ring components were made, and required to be within the budget. As part(More)
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