dor_id: 4132567

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la revista "Geofísica Internacional", se juzgan por medio de un proceso de revisión por pares

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Scientific Electronic Library Online (SciELO); SCOPUS, Dialnet, Directory of Open Access Journals (DOAJ); Geobase

561.#.#.u: https://www.geofisica.unam.mx/

650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/482/494

100.1.#.a: Pérez-peraza, J.; Gallegos-cruz, A.

524.#.#.a: Pérez-peraza, J., et al. (1994). The role of fluctuational acceleration in the generation of solar particles. Geofísica Internacional; Vol. 33 Núm. 2: Abril 1, 1994; 311-331. Recuperado de https://repositorio.unam.mx/contenidos/4132567

245.1.0.a: The role of fluctuational acceleration in the generation of solar particles

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1994

264.#.1.c: 1994-04-01

653.#.#.a: Física de Rayos Cósmicos; aceleración estocastica; tazas sistematicas y difusivas de aceleración; Cosmic ray physics; stochastic acceleration; systematic and diffusive acceleration rates

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/482

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/482

041.#.7.h: spa

520.3.#.a: Stochastic particle acceleration is essentially a diffusion process in energy phase space. In spite of the statistical behavior of the diffusion process, there is an average energy gain tendency of deterministic nature which is usually called Systematic Acceleration. In practice only the systematic acceleration rate has been considered, ignoring effects of the diffusion process, usually identified as a fluctuational acceleration rate. However, depending on the nature of the phase velocity spectrum of the turbulence, or on competitive energy loss processes, the average systematic acceleration rate may become inefficient and even null, so that energetic particle production is due only to the energy spread effects (diffusion in energy). We calculate separately the contribution of both energy change rates, in order to evaluate the importance of particle production by each. We consider the classical Fermi process and turbulent acceleration by magnetosonic waves (for the case in which S=O in the resonance condition). The transport equation is solved analytically for the steady state and for the time-dependent situation. We find that the contribution of fluctuational acceleriltion to the source solar particle spectrum cannot be considered as mere particle flux fluctuations, but may represent an important overproduction in some cases and particle depression in others. The relevance of energy spread effects is related to the efficiency of the energy gain: the nature of the initial particle population relative to the velocity spectra of turbulence, and thus the relative proportion among the different kind of interactions of particles with acc!lerating agents. We discuss the conditions under which diffusion in energy effects should be ignored relative to the average energy gain rate. With some exceptions in the stationary case, energy spectra derived on the basis of systematic acceleration alone cannot describe the real particle flux. This must be taken into account in calculations of the flux of secondary radiation.doi: https://doi.org/10.22201/igeof.00167169p.1994.33.2.479

773.1.#.t: Geofísica Internacional; Vol. 33 Núm. 2: Abril 1, 1994; 311-331

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

310.#.#.a: Trimestral

300.#.#.a: Páginas: 311-331

264.#.1.b: Instituto de Geofísica, UNAM

doi: https://doi.org/10.22201/igeof.00167169p.1994.33.2.479

handle: 00e3fea633b686e6

harvesting_date: 2023-06-20 16:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2008-02-22 17:09:20.0

file_modification_date: 2022-07-05 20:58:17.0

file_creator: J. Perez-Peraza and A. Gallegos-Cruz

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245.1.0.b: The role of fluctuational acceleration in the generation of solar particles

last_modified: 2023-06-20 16:00:00

license_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es

license_type: by-nc-sa

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