scholarly journals First measurements of low-energy cosmic rays on the surface of the lunar farside from Chang’E-4 mission

2022 ◽  
Vol 8 (2) ◽  
Author(s):  
Pengwei Luo ◽  
Xiaoping Zhang ◽  
Shuai Fu ◽  
Yong Li ◽  
Cunhui Li ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Low Energy ◽  
Earth Space ◽  
Near Earth Space ◽  
Lunar Farside

The intensity of low-energy cosmic rays on the lunar farside is consistent with that observed in the near-earth space.

Experiment NINA: investigation of low energy nuclear fluxes in the near-Earth space

1997 ◽  
Vol 8 (1-2) ◽  
pp. 109-121 ◽  
Author(s):  
A. Bakaldin ◽  
G. Barbiellini ◽  
S. Bartalucci ◽  
A. Batishev ◽  
R. Bellotti ◽  
...  
Keyword(s):  
Low Energy ◽  
Earth Space ◽  
Near Earth Space

scholarly journals Design of a Prototype Readout Electronics for a Low-energy Ion Spectrometer in Near-earth Space

2019 ◽  
Author(s):  
Zhenyu Sun ◽  
Zhe Cao ◽  
Guangyuan Yuan ◽  
Shuwen Wang ◽  
Yiren Li ◽  
...  
Keyword(s):  
Low Energy ◽  
Readout Electronics ◽  
Earth Space ◽  
Near Earth Space

scholarly journals Method of Wavelet-Decomposition to Research Cosmic Ray Variations: Application in Space Weather

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2313
Author(s):  
Oksana Mandrikova ◽  
Bogdana Mandrikova
Keyword(s):  
Cosmic Rays ◽  
Space Weather ◽  
Outer Space ◽  
Cosmic Ray ◽  
High Energy ◽  
Radiation Hazard ◽  
Interstellar Space ◽  
Radio Communication ◽  
Earth Space ◽  
Near Earth Space

Since their discovery, cosmic rays have been an integral part of the development of fundamental physics, from the discovery of radiation coming to the Earth from outer space and the identification of high-energy particles in it, as well as new fundamental symmetries in the laws of nature, to the knowledge of residual matter and magnetic fields in interstellar space. Cosmic rays are used in a number of fundamental and applied research in solar-terrestrial physics and are important in the research of the near-Earth space processes. Cosmic ray variations observed on the Earth’s surface are an integral result of various solar, heliospheric, magnetospheric and atmospheric phenomena. The most significant changes in cosmic ray parameters are caused by coronal mass ejections and subsequent changes in the parameters of the interplanetary magnetic field and solar wind. Therefore, the study of cosmic rays makes it possible to obtain valuable information about the processes in the near-Earth space and in the Earth’s magnetosphere during disturbed periods. This article proposes a method for analyzing cosmic ray variations. It is based on the use of wavelet data decomposition operations and their combination with threshold functions. By using adaptive thresholds, the operations for detecting anomalous changes in data and for suppressing the noise were developed. Anomalies in cosmic rays can cause radiation hazard for astronauts, radio communication failures, as well as malfunctions in satellites, leading to the loss of orientation and destruction. Therefore, the task of timely diagnostics of anomalies is urgent. The paper describes the algorithms for the implementation of the method and shows their application in the space weather problem. We used data from the network of ground stations of neutron monitors. The efficiency of the method for detecting abnormal changes of different amplitudes and durations is shown. Application of the method made it possible to detect clearly and to evaluate Forbush effects in cosmic rays, which precede the onset of magnetic storms of various nature and strength.

Beacon-satellite observations of wave disturbances in the plasma of near-earth space

2004 ◽  
Vol 10 (2-3) ◽  
pp. 16-21
Author(s):  
O.F. Tyrnov ◽  
◽  
Yu.P. Fedorenko ◽  
L.F. Chernogor ◽  
◽  
...  
Keyword(s):  
Satellite Observations ◽  
Earth Space ◽  
Near Earth Space ◽  
Wave Disturbances

scholarly journals Dynamical evolution of Oort cloud comets to near-Earth space

2006 ◽  
Vol 2 (S236) ◽  
pp. 43-54 ◽  
Author(s):  
Olga A. Mazeeva
Keyword(s):  
Dynamical Evolution ◽  
Absolute Magnitude ◽  
Oort Cloud ◽  
Outer Solar System ◽  
Earth Space ◽  
Near Earth Space ◽  
Long Period ◽  
Order Of Magnitude ◽  
Orbital Periods ◽  
Stellar Perturbations

AbstractThe dynamical evolution of 2⋅105 hypothetical Oort cloud comets by the action of planetary, galactic and stellar perturbations during 2⋅109 years is studied numerically. The evolution of comet orbits from the outer (104 AU <a<5⋅104 AU, a is semimajor axes) and the inner Oort cloud (5⋅103 AU <a<104 AU) to near-Earth space is investigated separately. The distribution of the perihelion (q) passage frequency in the planetary region is obtained calculating the numbers of comets in every interval of Δ q per year. The flux of long-period (LP) comets (orbital periods P>200 yr) with perihelion distances q<1.5 AU brighter than visual absolute magnitude H10=7 is ∼ 1.5 comets per year, and ∼18 comets with H10<10.9. The ratio of all LP comets with q<1.5 AU to ‘new’ comets is ∼5. The frequency of passages of LP comets from the inner Oort cloud through region q<1.5 AU is ∼3.5⋅10−13 yr−1, that is roughly one order of magnitude less than frequency of passages of LP comets from the outer cloud (∼5.28⋅10−12 yr−1). We show that the flux of ‘new’ comets with 15<q<31 AU is higher than with q<15 AU, by a factor ∼1.7 for comets from the outer Oort cloud and, by a factor ∼7 for comets from the inner cloud. The perihelia of comets from the outer cloud previously passed through the planetary region are predominated in the Saturn-Uranus region. The majority of inner cloud comets come in the outer solar system (q>15 AU), and a small fraction (∼0.01) of them can reach orbits with q<1.5 AU. The frequency of transfer of comets from the inner cloud (a<104 AU) to the outer Oort cloud (a>104 AU), from where they are injected to the region q<1.5 AU, is ∼6⋅10−14 yr−1.

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