A Differential Cerenkov Counter

Journal Article · Mon Dec 01 04:00:00 EST 1958 · IRE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/TNS2.1958.4315651· OSTI ID:4285385

Baldwin, D. E.; Burrowes, C.; Caldwell, D. O.; Hamilton, S. G.; Hill, D.; Osborne, L. S.; Ritson, D. M.

A beam of parallel particles of given velocity traversing a transparent radiator gives off Chereakov radiation at a unique angle with respect to the beam direction independently of the point of traversal. Such light can be brought to a ring focus. A Cherenkov counter has been built using this principle. Velocity definition is obtained by using a ring diaphragm on the face of a photomultiplier. The greatest velocity definition is obtained for small angle Cherenkov light. To change the velocity selection without changing the optics, the index of refraction of the radiator is varied. The index of refraction may be varied by changing the pressure of a gas near its critical point. The working fluid is Fluorochemical FC-75. The index of refraction of FC-75 can be varied continuously from n = 1.15 to n = 1.01 at a temperature of 250 C by changing the pressure. The counter has been tested using 1.8 Bev/c pi mesons from the Brookhaven Cosmotron; the counting rate vs. pressure of the FC-75 has a full width corresponding to less than DELTA BETA = 0.01.

• Research Organization: Massachusetts Inst. of Tech., Cambridge
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-003770
• OSTI ID: 4285385
• Journal Information: IRE Transactions on Nuclear Science, Journal Name: IRE Transactions on Nuclear Science Journal Issue: 3 Vol. 5; ISSN 0096-2015
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION
ANGULAR DISTRIBUTION
BEAMS
CHARGED PARTICLES
CHERENKOV COUNTERS
CHERENKOV RADIATION
CONFIGURATION
COSMOTRONS
ENERGY RANGE
FLUIDS
FOCUSING
GASES
GEV RANGE
HIGH TEMPERATURE
LIGHT
OPERATION
OPTICAL SYSTEMS
PHOTOMULTIPLIERS
PIONS
PLANNING
PRESSURE
PULSES
REFRACTION
RESOLUTION
SYNCHROTRONS
TESTING
TRANSPARENCY
VARIATIONS
VELOCITY