Liquid Helium Bubble Chamber
In order to study liquid helium as a bubble chamber fluid, experiments have been performed on a small cylindrical chamber 4 inches long and 1–1/2 inch in diameter. 1 Results indicate that usable tracks can be formed throughout the operating pressure region from atmospheric pressure down to 200 mm Hg. It was found that the bubble density for tracks of minimum ionization varies between approximately 40 bubbles per cm2 at 760 mm Hg (4. 2°K) and approximately 10 bubbles per cm2 at 200 mm Hg (3. 1°K). Figure 1 is a picture of electron tracks obtained at 400 mm Hg pressure.
KeywordsLiquid Helium Bubble Chamber Transfer Tube Electron Track Bubble Density
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