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Published April 1948 | Published
Journal Article Open

Small Cloud Chamber for Use with Unmanned Balloons


A small lightweight cloud chamber, designed for high altitude cosmic-ray researches, has been operated successfully in unmanned balloon flights up to an 80,000-ft. altitude. In view of the current interest in high altitude cosmic-ray studies, it seems appropriate to describe briefly some of the design features of the present apparatus.

Additional Information

© 1948 American Institute of Physics. Received 30 January 1948. The author wishes to thank Dr. Carl D. Anderson for his encouragement and help in the development and use of the apparatus. This work was carried out under Contract N6onr-102, Task Order III with the Office of Naval Research.

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