A high Pressure Cloud Chamber for Cosmic Ray Observation

概要

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A high pressure cloud chamber (50cm in dia, 20cm deep and used at 150 atm.)was built in the summer of 1952. The cloud chamber can be operated automatically, by counter control with a recycling time of about 20 minutes. It was filled with 5.6kg of nitrogen or 8kg of argon gas in its illuminated space of about 30litres, and it became much easier to observe some cosmic ray phenomena especially those events occurring in the gas nuclei in comparison with observations using the smaller type chamber (25cm in dia, 7cm deep and used at 100atm. )which has been used previously.
1956-03-05