Development of compact helium leak detector

For long vacuum chambers, like booster ring, transport lines etc., leak hunting after assembly is very important and for this purpose, we have developed a compact helium leak detector cell with small radius of curvature (2.5 cm), very low accelerating voltage, (270 V), in-built pressure monitoring (in the range of 10-4 mbar to 10-5 mbar), and light weight due to ferrite magnets in place of Alnico magnets. In combination with an isolation valve, the analyzing cell becomes a part of the vacuum system, rendering its service, whenever required. (author). 2 figs