Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2009-12-24
Mod.Phys.Lett.A25:489-499,2010
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
9 pages including 1 figure and 1 table
Scientific paper
10.1142/S0217732310032639
Results of the experiments on daemon detection performed in St-Petersburg in March 2009 are presented. Adding the data obtained with the daemon-sensitive FEU-167-1 PM tubes to the data amassed in our previous measurements (starting from 2000) raises the confidence level of existence of the spring maximum in NEACHO (near-Earth almost circular heliocentric orbit) daemon flux to ~5Sigma. The first test experiments conducted with the "dark" electron multiplier tubes, - TEU-167 with a thick (~0.5 um) Al coating over all of the inner surface of the near-cathode multiplier section, including also its front screen, look encouraging. They provide supportive evidence for the existence of diurnal modulation of the daemon flux and offer ~3.4x10-7 cm-2s-1 for its lower limit in March, in good agreement with our earlier estimates and measurements.
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