scholarly journals Cloud Chamber Observations of Cosmic Rays at 4300 Meters Elevation and Near Sea-Level

1936 ◽  
Vol 50 (4) ◽  
pp. 263-271 ◽  
Author(s):  
Carl D. Anderson ◽  
Seth H. Neddermeyer
Keyword(s):  
Cosmic Rays ◽  
Sea Level ◽  
Cloud Chamber

scholarly journals Dimethylamine and ammonia measurements with ion chromatography during the CLOUD4 campaign

2012 ◽  
Vol 5 (9) ◽  
pp. 2161-2167 ◽  
Author(s):  
A. P. Praplan ◽  
F. Bianchi ◽  
J. Dommen ◽  
U. Baltensperger
Keyword(s):  
Cosmic Rays ◽  
Sulphuric Acid ◽  
Ion Chromatography ◽  
Galactic Cosmic Rays ◽  
Cloud Chamber ◽  
Sampling Efficiency ◽  
Environmental Chamber ◽  
Mixing Ratios ◽  
Sampling Line ◽  
New Particles

Abstract. The CLOUD project investigates the influence of galactic cosmic rays on the nucleation of new particles in an environmental chamber at CERN. Dimethylamine (DMA) was injected intentionally into the CLOUD chamber to reach atmospherically relevant levels away from sources (up to 100 pptv) in order to study its effect on nucleation with sulphuric acid and water at 278 K. Quantification of DMA and also background ammonia (NH3) was performed with ion chromatography (IC). The IC method used together with the sampling line developed for CLOUD in order to measure NH3 and DMA at low pptv levels is described; the overall sampling efficiency of the method is discussed; and, finally, mixing ratios of NH3 and DMA measured during CLOUD4 are reported.

Energy spectrum of hadrons in cosmic rays at sea level

Nature ◽  
1975 ◽  
Vol 256 (5516) ◽  
pp. 387-388 ◽  
Author(s):  
F. ASHTON ◽  
A. J. SALEH
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Sea Level

Sea level search for leptonic quarks in cosmic rays

1973 ◽  
Vol 14 (1) ◽  
pp. 65-70 ◽  
Author(s):  
R. B. Hicks ◽  
R. W. Flint ◽  
S. Standil
Keyword(s):  
Cosmic Rays ◽  
Sea Level

scholarly journals The measurement of the energy of cosmic rays I—The electro-magnet and cloud chamber

1936 ◽  
Vol 154 (883) ◽  
pp. 564-573 ◽  
Keyword(s):  
Magnetic Field ◽  
Cosmic Rays ◽  
Electric Power ◽  
Strong Magnetic Field ◽  
Heavy Water ◽  
Cosmic Ray ◽  
Cloud Chamber ◽  
Pole Piece ◽  
Actual Length ◽  
And Performance

1—The Construction and Performance of the Electro-Magnet The energy of the cosmic ray particles has been determined from the curvature of their tracks in a strong magnetic field by Kunze, and by Anderson. Kunze used a power of 500 kw in a copper solenoid weighing 1100 kg to give a magnetic field of 18,400 gauss over a chamber 16⋅4 cm in diameter. Anderson used an electro-magnet with heavy water-cooled copper coils and a relatively light iron yoke. A power of 440 kw gave a field of 15,000 gauss over a chamber 16⋅5 cm in diameter, the actual length of the tracks photographed being about 12 cm. In order to obtain a similar performance without the use of such a very large amount of electric power, an electro-magnet has been constructed of a more conventional design, that is with an iron yoke which is heavy compared with the weight of the copper coils. The iron yoke weighs about 8000 kg and the copper coils 3000 kg. Figs. 1 a and 1 b show the detail of the design, and fig. 2 shows a photograph of the magnet in use with the cloud chamber and subsidiary apparatus. The diameter of the pole face is 25 cm, and the gap can be varied from 5 to 20 cm by sliding one pole piece along the baseplate by means of a screw.

scholarly journals On the technique of the counter controlled cloud chamber

1934 ◽  
Vol 146 (857) ◽  
pp. 281-299 ◽  
Keyword(s):  
Cosmic Rays ◽  
Cloud Chamber ◽  
Detailed Account ◽  
Short Account

The method by which very fast atomic particles are made to take their own could photographs has proved very useful for the investigation of cosmic rays. A short account of the method and a detailed account of the results obtained by its use have already been given by Blackett and Occhialini. Recently Locher and also Anderson, Millikan, Neddermeyer, and Pickering have used the same method and have obtained some beautiful results.

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