Forbush decrease in the intensity of cosmic rays in a toroidal model of a magnetic cloud

Petukhova, Anastasia; Petukhov, I. S.; Petukhov, S. I.

doi:10.1134/s0021364015230125

Cited by 10 publications

(16 citation statements)

References 7 publications

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“…The hypergeometric function on the torus surface of ( 0 , 0 , 0 , − ℎ −2 0 ) is used to determine values . As can be seen from (5), in this case is zero on the torus surface. This condition is similar to that using the first root of the zero-order Bessel function in the Lundquist solution.…”

Section: Pos(icrc2017)121mentioning

confidence: 83%

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Toroidal Models of the Force-free Magnetic Field

Petukhova¹,

Petukhov²,

Petukhov³

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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Section: Pos(icrc2017)121mentioning

confidence: 83%

“…However, the cylindrical model has its shortcomings as spatial distribution of cosmic rays (CR) depends on magnetic flux rope (MFR) due to their high mobility. Thus, the toroidal model is more appropriate for these studies [5,6].…”

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confidence: 99%

Toroidal Models of the Force-free Magnetic Field

Petukhova¹,

Petukhov²,

Petukhov³

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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“…При этом скорости деформации образца и величины деформирующих напряжений остаются примерно теми же, что и при повышенных температурах. Для объяснения атермического скольжения дислокации предложен механизм, определяемый туннелированием атомов через потенциальный барьер [9]. Но вероятность проявления этого механизма для атомов, содержащих в ядрах десятки и сотни нуклонов, чрезвычайно мала.…”

Section: Introductionunclassified

Динамические Смещения Атомов И Атермическое Скольжение Дислокаций В Кристаллах

Хон¹,

Zapolsky

2020

Физика Твердого Тела

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A dislocation glide mechanism at low temperatures is proposed. The mechanism is based on taking into account the dynamic displacements of atoms — displacements caused by nonadiabatic transitions of atoms in a crystal with a dislocation under the action of an external force. Dynamic displacements initiate the instability of a direct dislocation of relatively low-amplitude displacements during atomic vibrations. The development of instability leads to the formation of a double kink and a dislocation shift by one interatomic distance.

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“…We investigate FD in a MC having a MFR with a toroidal structure. Earlier we presented the calculation results of the CR flux entering into the torus segment through the lateral surface from the surrounding space (Petukhov & Petukhov, , ) and the calculation results of the FD amplitude and vector anisotropy for one type of MC (Petukhova et al, ). We compared the calculation results of the FD amplitude and the vector anisotropy with the measurements for the event on 27 July 2004 and found the dependence between the recovery time of the CR intensity and the MC orientation.…”

Section: Introductionmentioning

confidence: 99%

Image of Forbush Decrease in a Magnetic Cloud by Three Moments of Cosmic Ray Distribution Function

Petukhova

Petukhov

2019

JGR Space Physics

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The time dynamics of the cosmic ray distribution function in a magnetic cloud is calculated. The magnetic cloud has the form of a torus segment with the force‐free magnetic field structure at the initial moment. The subsequent propagation of the magnetic cloud in interplanetary space is determined by inertial description. The magnetic field is determined by the frozen‐in condition. When calculating the particle distribution function, the electromagnetic field of the magnetic cloud is taken into account, with the scattering of particles not being taken into account. Relations between the particle distribution function and its three moments (particle density and unidirectional and bidirectional anisotropies) are derived. It is established that cosmic ray losses at the regions connecting the magnetic cloud with the Sun determine the amplitude of the second step of Forbush decrease. The time dependence of the Forbush decrease characteristics on magnetic cloud type is determined. The calculation results of the particle density and unidirectional anisotropy generally correspond to measurements. The referred results show a prominent role of the magnetic field structure in the time dynamics of the Forbush decrease.

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Forbush decrease in the intensity of cosmic rays in a toroidal model of a magnetic cloud

Cited by 10 publications

References 7 publications

Toroidal Models of the Force-free Magnetic Field

Toroidal Models of the Force-free Magnetic Field

Динамические Смещения Атомов И Атермическое Скольжение Дислокаций В Кристаллах

Image of Forbush Decrease in a Magnetic Cloud by Three Moments of Cosmic Ray Distribution Function

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