Measurements of natural radiation with an MDU Liulin type device at ground and in the atmosphere at various conditions in the Arctic region

Mishev, Alexander; Binios, Alexandros; Turunen, Esa; Leppänen, Ari-Pekka; Larsen, Nicholas; Tanskanen, Eija; Usoskin, Ilya; Envall, Jouni; Iinatti, Toivo; Lakkala, Pasi

doi:10.1016/j.radmeas.2022.106757

Cited by 13 publications

(13 citation statements)

References 36 publications

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“…We emphasize that employment of different conversion coefficients 𝐶 𝑗 (𝑇 * ) would lead to an increase of the assessed exposure of about 20 %, which is considerably below the other model uncertainties [68,69]. The model is in very good agreement with measurements, including stratospheric balloonborne, reference data, as well as widely used models [65,[70][71][72].…”

Section: Pos(ecrs)016mentioning

confidence: 55%

Physics and effects of relativistic SEPs/GLEs

Mishev¹

2023

Proceedings of 27th European Cosmic Ray Symposium — PoS(ECRS)

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Systematic study of relativistic solar energetic particles provides key information about various processes, such as production and acceleration of energetic particles at the Sun and the interplanetary medium, interactions of energetic particles with magnetic fields in the heliosphere i.e. probing the electromagnetic and plasma conditions of the heliosphere, assessment of their terrestrial and space weather effects. Following solar eruptive processes, such as solar flares and/or coronal mass ejections solar ions are accelerated to a high-energy range. In the majority of cases, the maximum energy of the accelerated solar ions is several tens of MeV/nucleon, but in some cases, it exceeds 100 MeV/nucleon or even reaches GeV/nucleon range. In this case, the energy is enough high, so that solar ions generate an atmospheric cascade in the Earth's atmosphere, whose secondary particles reach the ground, eventually registered by ground-based detectors, specifically neutron monitors. This particular class of events is known as ground-level enhancements (GLEs). Here we report recent achievements related to the physics of relativistic SEPs/GLEs, their observations, and the related terrestrial and space weather effects.

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Section: Pos(ecrs)016mentioning

confidence: 55%

Physics and effects of relativistic SEPs/GLEs

Mishev¹

2023

Proceedings of 27th European Cosmic Ray Symposium — PoS(ECRS)

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“…The description and applications of the model as well as experimental verification and comparison with other models are given elsewhere (A. Mishev & Usoskin, 2018; A. Mishev, Koldobskiy, Usoskin, et al., 2021; A. Mishev, Tuohino, & Usoskin, 2018). The model was recently verified by direct HEMERA‐2 stratospheric scientific balloon flight, the details are given in (A. Mishev, Binios, et al., 2022).…”

Section: Assessment Of Exposure At Flight Altitudes During Gle # 60mentioning

confidence: 99%

“…The model was recently verified by direct HEMERA-2 stratospheric scientific balloon flight, the details are given in (A. Mishev, Binios, et al, 2022). The dose rate at a given atmospheric altitude (depth) h induced by a primary CR particle is the integral product of the primary CR particle spectrum with the corresponding yield function:…”

Section: Assessment Of Exposure At Flight Altitudes During Gle # 60mentioning

confidence: 99%

“…Subsequently, using the derived spectra and updated Oulu CRAC:DOMO (Cosmic Ray Atmospheric Cascade: Dosimetric Model) radiation model, which has been cross‐checked with other models and direct balloon‐borne measurements, we computed the exposure at typical commercial jet flight altitude(s), note that all references to altitude in this work are in reference to the US Standard Atmosphere model. During GLE # 60 dosimetric measurements were also obtained via an intercontinental flight from Prague to New York (PRG‐JFK) which, as part of an initiative by the Nuclear Physics Institute of the Czech Academy of Sciences, had a silicon‐based mobile dosimetry unit (MDU) Liulin device located onboard, which has recently been shown to provide good radiation measurements, particularly in high latitude regions (A. Mishev, Binios, et al., 2022), the data from which has been uploaded to a public database (Kákona et al., 2019). The computed exposure during GLE # 60 was also compared against the measurements obtained by this flight.…”

Section: Introductionmentioning

confidence: 99%

“…During GLE # 60 dosimetric measurements were also obtained via an intercontinental flight from Prague to New York (PRG-JFK) which, as part of an initiative by the Nuclear Physics Institute of the Czech Academy of Sciences, had a silicon-based mobile dosimetry unit (MDU) Liulin device located onboard, which has recently been shown to provide good radiation measurements, particularly in high latitude regions (A. Mishev, Binios, et al, 2022), the data from which has been uploaded to a public database (Kákona et al, 2019). The computed exposure during GLE # 60 was also compared against the measurements obtained by this flight.…”

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confidence: 99%

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Analysis of the Ground Level Enhancement GLE 60 on 15 April 2001, and Its Space Weather Effects: Comparison With Dosimetric Measurements

Larsen,

Mishev

2023

Space Weather

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As a result of notable solar activity observed in April 2001, one of the strongest ground level enhancements (GLE) of solar cycle 23 occurred, namely GLE # 60 on 15 April 2001. In this paper, we derived the spectral and angular characteristics, and apparent source position of the solar protons during the GLE # 60, using a verified by direct measurements model and employing the calibrated neutron monitor yield function. Subsequently, employing the updated and verified by balloon measurements dosimetric model: Oulu CRAC:DOMO (Cosmic Ray Atmospheric Cascade: Dosimetric Model) we computed the dose rates throughout the event at several altitudes using the obtained spectra as an input. A global map of the ambient dose at an altitude of 35 kft is computed. A comparison with direct dosimetric measurements obtained by a Liulin device during an intercontinental flight is performed and good agreement is achieved.

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Application of the global neutron monitor network for assessment of spectra and anisotropy and the related terrestrial effects of strong SEPs

Mishev

2023

Journal of Atmospheric and Solar-Terrestrial Physics

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Measurements of natural radiation with an MDU Liulin type device at ground and in the atmosphere at various conditions in the Arctic region

Cited by 13 publications

References 36 publications

Physics and effects of relativistic SEPs/GLEs

Physics and effects of relativistic SEPs/GLEs

Analysis of the Ground Level Enhancement GLE 60 on 15 April 2001, and Its Space Weather Effects: Comparison With Dosimetric Measurements

Application of the global neutron monitor network for assessment of spectra and anisotropy and the related terrestrial effects of strong SEPs

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