Velocity Spectrometers Used in Bevatron Deflected-Beam Research

Two completely redesigned 10-ft, glasscathode, parallel-plate velocity spectrometers (MK V) have been used in particle research at 500 kV for about 3000 hr each without maintenance. Current consumption, including power supply, is approximately 100 ¿A on each plate (< 200 ¿A total). The units do not appear to be gap-sensitive, as one was operated with a 2-in. gap, and the other with a 4-in. gap. No significant operating differences are apparent.