PHYSICAL MEASUREMENTS FROM PHOTOGRAPHS OF PARTICLE TRACES IN BUBBLE CHAMBERS (in Russian)
Journal Article
·
· Uspekhi Fiz. Nauk
Comparative characteristics of various chambers and photoemulsions, the operating properties of liquids used in bubble chambers, and the range of mu - mesons, pi -mesons, K-mesons and protons at energies of 5 to 1000 mev in various bubble chambers are summarized. The methods of calculating the spatial location of particle tracks from the coordinates measured on a film are presented. In determining the velocity of high-energy particles, it is essential that the final pressure and temperature be kept constant so that relation between velocity and number of bubbles per 1 cm length of track can be used to determine the velocity. The effect of overlapping of the bubbles in determining the average density of the bubbles is discussed. The velocity of the particle can be found from the number of delta -electrons observed along the particle track. The error from multiple scattering in measuring the momentum of a particle in a bubble chamber placed in a magnetic field is discussed. Methods of determining the "scattering constant'', and the determination of the momentum by measuring the curvature of a trace due to the combined effect of a magnetic field and multiple scattering are given. The use of semi-automatic devices for measuring the coordinates of photographed particle tracks, and transformation of the measured values for computer use is mentioned briefly. (74 references). (TTT)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-027831
- OSTI ID:
- 4843607
- Journal Information:
- Uspekhi Fiz. Nauk, Journal Name: Uspekhi Fiz. Nauk Vol. Vol: 73
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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