scholarly journals Interpretation of the Spectral Inhomogeneity in the 10 TV Region in Terms of a Close Source

Universe ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 460
Author(s):  
Ilya Kudryashov ◽  
Farid Gasratov ◽  
Vladimir Yurovskiy ◽  
Vasilii V. Latonov

The description of the inhomogeneity of the cosmic ray spectrum in the region of 10 TV, which is observed in experimental data, in terms of isotropic diffusion from a single close source is considered. It is shown that such a description is possible, and the area of possible localization of the source in space and time and its energy are found. The method of penalty functions is used to account for the data on the spectrum of all particles.

2019 ◽  
Vol 210 ◽  
pp. 02001
Author(s):  
Sergey Ostapchenko

The differences between contemporary Monte Carlo generators of high energy hadronic interactions are discussed and their impact on the interpretation of experimental data on ultra-high energy cosmic rays (UHECRs) is studied. Key directions for further model improvements are outlined. The prospect for a coherent interpretation of the data in terms of the UHECR composition is investigated.


2019 ◽  
Vol 208 ◽  
pp. 11005
Author(s):  
K. Werner ◽  
B. Guiot ◽  
Iu. Karpenko ◽  
T. Pierog ◽  
G. Sophys ◽  
...  

We summarize the main features of the hadronic interaction model EPOS, which is used for cosmic ray air shower simulations but also for p-p, p-A, and A-A collisions to be compared with experimental data from LHC and RHIC.


2019 ◽  
Vol 208 ◽  
pp. 08018
Author(s):  
S.S. Khokhlov ◽  
A.G. Bogdanov ◽  
V.A. Khomyakov ◽  
V.V. Kindin ◽  
R.P. Kokoulin ◽  
...  

Results of analysis of experimental data on cascade showers with energies of 0.1 – 10 TeV initiated by muons in the Cherenkov water detector NEVOD are presented. The method of selection and reconstruction of cascade parameters in the volume of the detector is discussed. Experimental distributions of cascade axes in zenith angle and energy spectrum of cascades are obtained. The measured distributions are compared with results of calculations.


2008 ◽  
Vol 4 (S257) ◽  
pp. 471-473
Author(s):  
M. Buchvarova ◽  
P. Velinov

AbstractOur model generalizes the differential D(E) and integral D(>E) spectra of cosmic rays (CR) during the 11-year solar cycle. The empirical model takes into account galactic (GCR) and anomalous cosmic rays (ACR) heliospheric modulation by four coefficients. The calculated integral spectra in the outer planets are on the basis of mean gradients: for GCR – 3%/AU and 7%/AU for anomalous protons. The obtained integral proton spectra are compared with experimental data, the CRÈME96 model for the Earth and theoretical results of 2D stochastic model. The proposed analytical model gives practical possibility for investigation of experimental data from measurements of galactic cosmic rays and their anomalous component.


2018 ◽  
Vol 4 (3) ◽  
pp. 76-82 ◽  
Author(s):  
Валерий Янчуковский ◽  
Valery Yanchukovsky ◽  
Василий Кузьменко ◽  
Vasiliy Kuzmenko

Variations in the intensity of cosmic rays observed in the depth of the atmosphere include the atmospheric component of the variations. Cosmic-ray muon telescopes, along with the barometric effect, have a significant temperature effect due to the instability of detected particles. To take into account atmospheric effects in muon telescope data, meteorological coefficients of muon intensity are found. The meteorological coefficients of the intensity of muons recorded in the depth of the atmosphere are estimated from experimental data, using various methods of factor analysis. The results obtained from experimental data are compared with the results of theoretical calculations.


1958 ◽  
Vol 6 ◽  
pp. 377-385
Author(s):  
V. Sarabhai ◽  
N. W. Nerurkar ◽  
S. P. Duggal ◽  
T. S. G. Sastry

Study of the anisotropy of cosmic rays from the measurement of the daily variation of meson intensity has demonstrated that there are significant day-today changes in the anisotropy of the radiation. New experimental data pertaining to these changes and their solar and terrestrial relationships are discussed.An interpretation of these changes of anisotropy in terms of the modulation of cosmic rays by streams of matter emitted by the sun is given. In particular, an explanation for the existence of the recently discovered types of daily variations exhibiting day and night maxima respectively, can be found by an extension of some ideas of Alfvén, Nagashima, and Davies. An integrated attempt is made to interpret the known features of the variation of cosmic ray intensity in conformity with ideas developed above.


2013 ◽  
Vol 53 (A) ◽  
pp. 707-711 ◽  
Author(s):  
Anatoly A. Petrukhin

The cosmic ray energy region 10<sup>15</sup> ÷ 10<sup>17</sup>TeV corresponds to LHC energies 1 ÷ 14TeV in the center-of-mass system. The results obtained in cosmic rays (CR) in this energy interval can therefore be used for developing new approaches to the analysis of experimental data, for interpreting the results, and for planning new experiments. The main problem in cosmic ray investigations is the remarkable excess of muons, which increases with energy and cannot be explained by means of contemporary theoretical models. Some possible new explanations of this effect and other unusual phenomena observed in CR, and ways of searching for them in the LHC experiments are discussed.


Author(s):  
Dmitrijus Styro ◽  
Jovita Damauskaitė ◽  
Aleksej Beliajev

Measurements and analyses of variations of the hard cosmic ray flux (HCRF) were carried out in the energy range 1.2–1.6 MeV in Vilnius in 2002–2005, using gamma-spectrometer. The predictive connection between increase of HCRF and atmospheric pressure in 2–5 days was defined. Investigation of this connection was conducted into a period of time 14–19 h, which was divided into five hourly time intervals: 14–15, 15–16, 16–17, 17–18 and 18–19. For procession of experimental data, the empirical criteria of HCRF increase were suggested. These criteria indicate the HCRF increase in two or more number intervals with a condition of HCRF increase by 15 imp/h or more in every of them next day and total value has to exceed 40 and 50 imp/h. The efficiency of prognosis of atmospheric pressure increase by the increase of HCRF was 62–73% in 2002–2005, using the first criterion (40 imp/h) and 53–67% using the second one (50 imp/h). The illustration of atmospheric pressure formations confirm the results of prognosis of anticyclone transfer, which block the way to the motion of cyclones eastward from the Atlantic Ocean. Hence, the prognostic connection between atmospheric pressure increases in 2–5 days by HCRF increase was defined for the first time. Santrauka 2002–2005 m. gamą spektrometru Vilniuje atlikti 1,2–1,6 MeV energinio intervalo kietosios kosminės spinduliuotės srauto (KKSS) matavimai. Nustatytas prognostinis ryšys tarp KKSS didėjimo ir atmosferos slėgio padidėjimo po 2–5 parų. Tirta laiko intervalas nuo 14 iki 19 h. Rezultatų analizei šis tarpsnis padalytas į penkis laiko intervalus: 14–15, 15–16, 16–17, 17–18 ir 18–19 h. Gautiems duomenims realizuoti praktiškai buvo pasiūlyti dviejų ar didesnio nurodyto laiko intervalų skaičiaus KKSS didėjimo empiriniai kriterijai su sąlyga, kad kiekvieno iš jų KKSS padidėjimas ne mažesnis kaip 15 imp./h, o suminė reikšmė turi viršyti 40 imp./h, arba 50 imp./h. Esant šioms sąlygoms buvo ieškomas koreliacinis ryšys tarp KKSS variacijų ir atmosferos slėgio padidėjimų. Prognozės efektyvumas 2002–2005 m., taikant pirmajį kriterijų (40 imp./h), buvo 62–72%, o taikant antrajį (50 imp./h) mažesnis – 53–67%. Barinių formacijų iliustravimas patvirtina blokuojančių anticiklonų, kurie užtveria kelią nuo Atlanto vandenyno judantiems į rytus ciklonams, judėjimo prognozės rezultatus. Pirmą kartą nustatytas prognostinis ryšys tarp KKSS didėjimo ir atmosferos slėgio padidėjimo po 2–5 parų. Резюме Измерения и анализ вариаций потока жесткого космического излучения (ПЖКИ) проводились в энергетическоминтервале 1,2–1,6 МэВ в г. Вильнюсе в 2002–2005 гг. с помощью гаммаспектрометра. Определялась прогностическая связь между ростом ПЖКИ и увеличением атмосферного давления спустя 2–5 суток. Исследования такой связи проводились ежедневно от 14 до 19 часов. Этот временной диапазон разделялся на пять временных часовыхинтервалов: 14–15, 15–16, 16–17, 17–18, 18–19 час. Для обработки опытных данных предложены эмпирическиекритерии, которые определяют ПЖКИ в двух или большем количестве временных интервалов при условии, чтоего рост в каждом из них на следующие сутки должен быть не менее 15 имп/час, а суммарное значение должнопревышать 40 или 50 имп/час. При этих условиях была установлена корреляционная связь между ростом ПЖКИ иувеличением атмосферного давления, эффективность которой для 2002–2005 гг. оказалась 62–72 % с применением первого критерия (40 имп/час), а при использовании второго эффективность оказалась ниже – 53–67 %. Приведенная иллюстрация барических образований подтверждает результаты прогноза смещения блокирующихантициклонов, которые перекрывают путь циклонам, движущимся в восточном направлении со стороны Атлантического океана. Таким образом, впервые установлена прогностическая связь между возрастанием ПЖКИ и ростом атмосферного давления спустя 2–5 суток.


1959 ◽  
Vol 37 (2) ◽  
pp. 189-202 ◽  
Author(s):  
Georges Hall

The ionization of argon by cosmic-ray mu-mesons of minimum specific ionization has been studied by means of a calibrated pressure-ionization chamber using electron collection. Corrections which are shown to be necessary have been applied to the experimental data. The shape of the experimental curve of statistical distribution of energy loss agrees with the theoretically predicted shape, for energy losses greater than the most probable loss (300 kev).


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