Press Release on Cosmic Ray Research: September-2018

CALET succeeds in direct measurements of cosmic-ray electron spectrum up to 4.8 TeV

An international team of researchers succeeded in extending their result from a previous study ANd directly measured the cosmic-ray all-electron (electron + positron) spectrum in an energy vary from eleven GeV to four.8 TeV with the measure negatron Telescope (CALET).

CALET, a detector optimized to watch high-energy electrons, was put in on the Japanese Experimental Module Kibo on the International space laboratory (ISS) on August 2015 because of the initial, Japanese-led, space-based mission dedicated to ionizing radiation observations. [1]

Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS

Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies ar a novel probe of our native Galactic neighborhood. CREs lose energy chop-chop via cyclotron radiation and inverse-Compton scattering processes whereas propagating among the Galaxy and these losses limit their propagation distance. For electrons with TeV energies, the limit is on the order of a kiloparsec. among that distance their ar solely a couple of famous uranology objects capable of fast electrons to such high energies. it’s additionally attainable that the CREs are the merchandise of the annihilation or decay of significant substance (DM) particles. VERITAS, associate degree array of imaging air Cherenkov telescopes in southern Arizona, USA, is primarily utilized for gamma-ray uranology, however, additionally at the same time collects CREs throughout all observations. [2]

The expectation on probing the origin of the cosmic ray knee with the LHAASO experiment

The cosmic-ray (CR) knee and also the compositions contain copious data for inquiring the CR’s origin, acceleration, and propagation mechanisms, also because of the frontier of the elemental physics. Realizing that major proposals toward the knee’s form may be divided into 2 categories: the rigidity-dependent (also Z-dependent) knee and also the mass-dependent (also A-dependent) knee, wherever the previous one relates to the acceleration or the propagation mechanisms, and also the different one is usually related to the new physics, it’s essential to exactly live the individual compositions. like the high altitude and hybrid detection strategies, the LHAASO experiment has the power in deciding the individual element and brings the U.S.A. a chance of discriminating these 2 models [3]

Cosmic ray intensity increases during high solar activity period for the solar cycles 22 and 23

The varied star output is plagued by the Sun’s activity and associated phenomena. Predictions of star and geomagnetic activity area unit vital for numerous technologies, together with the operation of low-earth-orbiting satellites, electrical power transmission grids, geology exploration and high-frequency radio communications. Annual averages of geomagnetic activity in cycle twenty three were found to be giant compared with different cycles. [4]

The Impact of Solar Flares and Cosmic Rays on Atmospheric Decay

Aims: the target of this paper is to introduce a Relativistic theoretical account that calculates the amount of ionizing radiation and high energy flare particles that enter the atmosphere.

Study Design: The Relativistic theoretical account is tested against the Arley model.

Place and length of Study: Department of analysis and development, at political economy Traffic Clinic in Paris, between January 2013 and March 2013. [5]

Reference

[1] CALET succeeds in direct measurements of cosmic-ray electron spectrum up to 4.8 TeV

Date: July 19, 2018, Source: Waseda University (web link)

[2] Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS

Archer A, Benbow W, Bird R, Brose R, Buchovecky M, Buckley JH, Bugaev V, Connolly MP, Cui W, Feng Q, Finley JP. Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS. arXiv preprint arXiv:1808.10028. 2018 Aug 29. (web link)

[3]  Expectation on probing the origin of the cosmic ray knee with the LHAASO experiment

Jin C, Yin LQ, Chen SZ, He HH. Expectation on probing the origin of the cosmic ray knee with the LHAASO experiment. arXiv preprint arXiv:1808.10797. 2018 Aug 31. (web link)

[4] Cosmic ray intensity increases during high solar activity period for the solar cycles 22 and 23

Singh S, Mishra AP. Cosmic ray intensity increases during high solar activity period for the solar cycles 22 and 23. Indian Journal of Physics. 2018:1-7. (web link)

[5] The Impact of Solar Flares and Cosmic Rays on Atmospheric Decay

  1. M. Khoshyaran1*

1ETC, Economics Traffic Clinic, 34 Avenue Des Champs Elysees, 75008 Paris, France. (web link)

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