The use of the high pressure cloud chamber in the study of the unstable particles of the cosmic radiation

1956 ◽  
Vol 4 (S2) ◽  
pp. 272-285 ◽  
Author(s):  
E. Donald ◽  
G. E. Evans ◽  
E. S. Williams ◽  
J. P. Astbury ◽  
P. Baxter ◽  
...  
Keyword(s):  
High Pressure ◽  
Cosmic Radiation ◽  
Cloud Chamber ◽  
Unstable Particles

High‐Pressure Diffusion Cloud‐Chamber System

1955 ◽  
Vol 26 (11) ◽  
pp. 1053-1057 ◽  
Author(s):  
R. A. Schluter ◽  
S. C. Wright
Keyword(s):  
High Pressure ◽  
Cloud Chamber ◽  
Chamber System ◽  
Pressure Diffusion

Cloud Chamber Photographs of the Cosmic Radiation

Physics Today ◽  
1953 ◽  
Vol 6 (8) ◽  
pp. 16-16
Author(s):  
G. D. Rochester ◽  
J. G. Wilson ◽  
Urner Liddel
Keyword(s):  
Cosmic Radiation ◽  
Cloud Chamber

Note on High Pressure Cloud‐Chamber Operation

1948 ◽  
Vol 19 (12) ◽  
pp. 918-919 ◽  
Author(s):  
J. S. Laughlin
Keyword(s):  
High Pressure ◽  
Cloud Chamber

scholarly journals High‐Pressure Expansion‐Diffusion Cloud Chamber

1957 ◽  
Vol 28 (6) ◽  
pp. 472-473
Author(s):  
Robert H. Good ◽  
Larry O. Oswald ◽  
Wilson M. Powell
Keyword(s):  
High Pressure ◽  
Cloud Chamber

The use of the high pressure cloud chamber in comsic ray investigations

1954 ◽  
Vol 11 (S2) ◽  
pp. 343-356 ◽  
Author(s):  
E. H. S. Burhop
Keyword(s):  
High Pressure ◽  
Cloud Chamber

13.—A Search for the Quark in Extensive Air Showers, using a Counter-controlled Cloud Chamber

1972 ◽  
Vol 70 ◽  
pp. 143-153 ◽  
Author(s):  
G. R. Evans ◽  
N. E. Fancey ◽  
J. Muir ◽  
A. A. Watson
Keyword(s):  
High Pressure ◽  
Cloud Chamber ◽  
Extensive Air Showers ◽  
Acceptance Angle ◽  
Air Showers ◽  
Experimental Conditions ◽  
Counting Technique ◽  
Upper Limit ◽  
Statistical Variations ◽  
Singly Charged

SynopsisA search is reported for the relativistic e/3 quark among the cores of Extensive Air Showers initiated by primaries with energies greater than 1014 eV. The detector is a high-pressure cloud chamber filled with helium at 28 atmospheres, and is counter controlled. The experimental conditions avoid the criticisms levelled at the McCusker experiment and are such that the tracks of e/3 quarks cannot be simulated by singly charged shower particles either through statistical variations in primary ionisation or otherwise. The primary ionisation density, measured using a gap-counting technique on post-expansion electron and muon tracks, is compared with predictions from the theory of Budini et al. (1960). The agreement achieved shows that the theory is a reliable foundation for methods of identifying quark candidates, and measuring charges. The experiment has been running for 5000 hours. No quark candidates have been found. With an acceptance angle of 0·3 sr and an area of 140 cm2, this sets the upper limit of flux of e/3 quarks at 4 × 10−9 cm−2 sec−1 sr−1 with 95 per cent, confidence. The experiment is being continued.

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