Pub Date : 2022-07-15DOI: 10.31527/analesafa.2022.33.2.31
S. Levis, A. Villegas, J. Escrig, N. Bajales Luna, D. M. Arciniegas Jaimes
The present study describes the magnetic properties of nanotubes and nanowires of Permalloy through micromagnetic simulations. These properties are evaluated as a function of the external diameters of such one-dimensional nanostructures when the magnetic field applied is parallel and perpendicular to the easy axis of the nanostructures. In addition, the diameter of the nanostructures was also varied in order to discuss the similarities and differences in the magnetic properties as a function of their length
{"title":"QUASI-STATIC PROPERTIES OF ONE-DIMENSIONAL PERMALLOY NANOSTRUCTURES: A COMPARATIVE ANALYSIS AS A FUNCTION OF GEOMETRICAL PARAMETERS","authors":"S. Levis, A. Villegas, J. Escrig, N. Bajales Luna, D. M. Arciniegas Jaimes","doi":"10.31527/analesafa.2022.33.2.31","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.2.31","url":null,"abstract":"The present study describes the magnetic properties of nanotubes and nanowires of Permalloy through micromagnetic simulations. These properties are evaluated as a function of the external diameters of such one-dimensional nanostructures when the magnetic field applied is parallel and perpendicular to the easy axis of the nanostructures. In addition, the diameter of the nanostructures was also varied in order to discuss the similarities and differences in the magnetic properties as a function of their length","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"38 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87589161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-15DOI: 10.31527/analesafa.2022.33.2.42
N. Martin, M. Sofo Haro, M. Valente
In recent years, the study of X-ray spectrometry has promoted significant advances in various scientific areas, thus increasing the implementation of ionizing radiation in many applications of modern technology. Typical X-ray spectrometry systems consist of a set of devices that allow this radiation to be converted into a detectable electrical signal. The main spectrometer components include: the sensitive volume (detector), the multichannel pulse processing device, and the associated software. Cadmium telluride (CdTe) has been introduced as a suitable bulk-sensing semiconductor material that reports higher efficiency compared to silicon diodes. Then, the Amptek XR-100T-CdTe spectrometer has gained wide applications during the last years, mainly due to its performance achieving high efficiency up to 100 keV.The present work reports on the characterization of detector response for the Amptek XR using Monte Carlo simulations, while separately accounting for the contribution of the different spectrometer components. To this aim, the geometry along with the elemental composition properties of the different components have been carefully included in the simulation setup. A kernel-based approach has been implemented to study the response of the detector using narrow monoenergetic X-ray beams having incident kinetic energy within [5-1000] keV, and discriminating the relative contribution for each kernel attributable to the different spectrometer components. Finally, the simulation results have been compared with the efficiency curve reported by the manufacturer, showing good agreement with the kernel based approach characterization when the CdTe sensitive volume along with the Be vacuum window are taken into account.
{"title":"CHARACTERIZATION OF THE XR-100-CdTe AMPTEK SPECTROMETER RESPONSE BY MEANS OF MONTE CARLO SIMULATIONS USING THE PENELOPE CODE","authors":"N. Martin, M. Sofo Haro, M. Valente","doi":"10.31527/analesafa.2022.33.2.42","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.2.42","url":null,"abstract":"In recent years, the study of X-ray spectrometry has promoted significant advances in various scientific areas, thus increasing the implementation of ionizing radiation in many applications of modern technology. Typical X-ray spectrometry systems consist of a set of devices that allow this radiation to be converted into a detectable electrical signal. The main spectrometer components include: the sensitive volume (detector), the multichannel pulse processing device, and the associated software. Cadmium telluride (CdTe) has been introduced as a suitable bulk-sensing semiconductor material that reports higher efficiency compared to silicon diodes. Then, the Amptek XR-100T-CdTe spectrometer has gained wide applications during the last years, mainly due to its performance achieving high efficiency up to 100 keV.The present work reports on the characterization of detector response for the Amptek XR using Monte Carlo simulations, while separately accounting for the contribution of the different spectrometer components. To this aim, the geometry along with the elemental composition properties of the different components have been carefully included in the simulation setup. A kernel-based approach has been implemented to study the response of the detector using narrow monoenergetic X-ray beams having incident kinetic energy within [5-1000] keV, and discriminating the relative contribution for each kernel attributable to the different spectrometer components. Finally, the simulation results have been compared with the efficiency curve reported by the manufacturer, showing good agreement with the kernel based approach characterization when the CdTe sensitive volume along with the Be vacuum window are taken into account.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"9 12","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72412010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-15DOI: 10.31527/analesafa.2022.33.2.48
R. Meilij, E. Aon, M. Valente
The complex planning processes in radiotherapy treatments are commonly approached using computer tools that determine the dose distribution corresponding to different irradiation schemes aimed at providing viable options to fulfill the clinical and physical requirements of each case. This paper reports on a novel methodology developed to calculate spatial distributions of doses corresponding to stereotactic irradiations, incorporating arc-irradiation schemes and being representative of treatment planning, by means of phase-Spacefiles; and using Monte Carlo simulations to perform radiation transport. The methodology was implemented with the FLUKA code and was applied to a situation of clinical complexity using tomographic images of a standardized dosimetry control phantom for stereotactic radiosurgery. The preliminary results obtained from the first step of the process, aimed at incorporating simple schemes, along with clinical radiosurgery phantom irradiation, confirm the feasibility of the proposed methodology and indicate a promising performance for an alternative or independent calculation of spatial dose distributions in stereotactic irradiations.
{"title":"A METHODOLOGY FOR DEFINING IRRADIATION SCHEMES FROM PHASE-SPACE FILES TO SIMULATE RADIOTHERAPY PLANNING","authors":"R. Meilij, E. Aon, M. Valente","doi":"10.31527/analesafa.2022.33.2.48","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.2.48","url":null,"abstract":"The complex planning processes in radiotherapy treatments are commonly approached using computer tools that determine the dose distribution corresponding to different irradiation schemes aimed at providing viable options to fulfill the clinical and physical requirements of each case. This paper reports on a novel methodology developed to calculate spatial distributions of doses corresponding to stereotactic irradiations, incorporating arc-irradiation schemes and being representative of treatment planning, by means of phase-Spacefiles; and using Monte Carlo simulations to perform radiation transport. The methodology was implemented with the FLUKA code and was applied to a situation of clinical complexity using tomographic images of a standardized dosimetry control phantom for stereotactic radiosurgery. The preliminary results obtained from the first step of the process, aimed at incorporating simple schemes, along with clinical radiosurgery phantom irradiation, confirm the feasibility of the proposed methodology and indicate a promising performance for an alternative or independent calculation of spatial dose distributions in stereotactic irradiations.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"32 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73829151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-15DOI: 10.31527/analesafa.2022.33.1.6
A. Gayol, M. Valente
Both analytical and numerical methods have proven to be suitable for describing radiation transport and interactions. The standard Boltzmann formalism derived from statistical mechanics requires to be specifically re-formulated to account for the interactions with external electromagnetic fields. Verifying the proper implementation of the external electromagnetic field coupling in Monte Carlo simulation codes is a key issue to confirm the feasibility of using such a tool to describe complex applications like image-guided radiotherapy based on integrating magnetic resonance scanner to the radiant field of ionizing radiation along with the subsequent dosimetric effects. The present work reports on the feasibility and reliability of the Monte Carlo FLUKA and PENELOPE main codes to assess electron trajectory in presence of strong magnetic fields. The obtained results confirm the ability of FLUKA and Penelope to model the alterations in the electron trajectories due to external magnetic field effects, also demonstrating an excellent agreement between both codes and with the theoretical-analytical model.
{"title":"ANALYTICAL AND MONTE CARLO SIMULATION STUDY OF THE INFLUENCE OFSTRONG MAGNETIC FIELDS ON THE PATH OF ELECTRONS WITH ENERGY TYPICAL OF MRI-LINAC RADIOTHERAPY","authors":"A. Gayol, M. Valente","doi":"10.31527/analesafa.2022.33.1.6","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.1.6","url":null,"abstract":"Both analytical and numerical methods have proven to be suitable for describing radiation transport and interactions. The standard Boltzmann formalism derived from statistical mechanics requires to be specifically re-formulated to account for the interactions with external electromagnetic fields. Verifying the proper implementation of the external electromagnetic field coupling in Monte Carlo simulation codes is a key issue to confirm the feasibility of using such a tool to describe complex applications like image-guided radiotherapy based on integrating magnetic resonance scanner to the radiant field of ionizing radiation along with the subsequent dosimetric effects. The present work reports on the feasibility and reliability of the Monte Carlo FLUKA and PENELOPE main codes to assess electron trajectory in presence of strong magnetic fields. The obtained results confirm the ability of FLUKA and Penelope to model the alterations in the electron trajectories due to external magnetic field effects, also demonstrating an excellent agreement between both codes and with the theoretical-analytical model.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"62 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84286637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-15DOI: 10.31527/analesafa.2022.33.1.18
A. Scagliotti, G. A. Jorge
Air quality is one of the biggest environmental problems today, and airborne particles are a well-studied indicator given their impacts on health and climate. The cost of regulatory measurement equipment leads to limited information availability in many parts of the world, as in Argentina. This work proposes modeling of particulate matter from ArtificialNeural Networks, fed with data from low-cost equipment developed and used for this purpose. In this way, a study of air quality in the Center-North of the Buenos Aires suburbs is presented, providing new information on quantities and types of particles in a region without historical antecedents. Coarse particles were mostly found at low concentrations and a prediction model for particulate matter with good performance was developed.
{"title":"LOW-COST METHODS TO PARTICULATE MATTER PRELIMINARY STUDY IN THECENTER-NORTH OF BUENOS AIRES SUBURBS","authors":"A. Scagliotti, G. A. Jorge","doi":"10.31527/analesafa.2022.33.1.18","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.1.18","url":null,"abstract":"Air quality is one of the biggest environmental problems today, and airborne particles are a well-studied indicator given their impacts on health and climate. The cost of regulatory measurement equipment leads to limited information availability in many parts of the world, as in Argentina. This work proposes modeling of particulate matter from ArtificialNeural Networks, fed with data from low-cost equipment developed and used for this purpose. In this way, a study of air quality in the Center-North of the Buenos Aires suburbs is presented, providing new information on quantities and types of particles in a region without historical antecedents. Coarse particles were mostly found at low concentrations and a prediction model for particulate matter with good performance was developed.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"67 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88197915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-15DOI: 10.31527/analesafa.2022.33.1.1
J. C. Corona-Oran, D. Osorio-González, J. Mulia-Rodríguez
In this work, we obtained density profiles of Radon particles near the alveolar wall surface by the development of a theoretical model that describes the interaction between such particles and the alveolar wall cells. The model captures relevant biological and physicochemical characteristics such as the width of the alveolar wall and the energy required for the Radon particles to pass through it. The system satisfies the conditions to be considered in thermodynamic equilibrium and under normal pressure and temperature conditions. We numerically solved the Ornstein-Zernike equations derived from the integral-equation formalism and showed the effects of changing the alveolus size, the alveolar wall width, and the energy required to pass through its Radon density profiles. Our method is a helpful tool in biophysics and other related areas.
{"title":"RADON DENSITY PROFILES IN ALVEOLAR PORES: AN INTEGRAL EQUATION FORMALISM APPLICATION","authors":"J. C. Corona-Oran, D. Osorio-González, J. Mulia-Rodríguez","doi":"10.31527/analesafa.2022.33.1.1","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.1.1","url":null,"abstract":"In this work, we obtained density profiles of Radon particles near the alveolar wall surface by the development of a theoretical model that describes the interaction between such particles and the alveolar wall cells. The model captures relevant biological and physicochemical characteristics such as the width of the alveolar wall and the energy required for the Radon particles to pass through it. The system satisfies the conditions to be considered in thermodynamic equilibrium and under normal pressure and temperature conditions. We numerically solved the Ornstein-Zernike equations derived from the integral-equation formalism and showed the effects of changing the alveolus size, the alveolar wall width, and the energy required to pass through its Radon density profiles. Our method is a helpful tool in biophysics and other related areas.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"58 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76189728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-15DOI: 10.31527/analesafa.2021.32.4.120
C. García, V. P. Ramunni
We study the behavior of hydrogen (H) in theαandβphases of Zr and in theβphase of Nb, using the Siesta andVasp first principles codes based on the density functional theory (DFT). We calculate the hydrogen solution energy, the binding energy of the H-H and H-Nb complexes, as well as, the mixing energy of the Zr-Nb system. Furthermore, we have proposed a simple model for the study of the hydrogen diffusion (DH) mediated by interstitial mechanism in hcp Zr. We find that interstitial hydrogen diffuses isotropically according to DH=1.1×10−7exp(−42 KJ.mol−1/RT)(m2/s). Our results are in good agreement with experimental data and other Kinetic Monte Carlo (KMC) calculations. Finally, the formation energies of the three most stable hydrides in the hcp Zr phase were also calculated.
{"title":"HYDROGEN DIFFUSION IN HCP Zr","authors":"C. García, V. P. Ramunni","doi":"10.31527/analesafa.2021.32.4.120","DOIUrl":"https://doi.org/10.31527/analesafa.2021.32.4.120","url":null,"abstract":"We study the behavior of hydrogen (H) in theαandβphases of Zr and in theβphase of Nb, using the Siesta andVasp first principles codes based on the density functional theory (DFT). We calculate the hydrogen solution energy, the binding energy of the H-H and H-Nb complexes, as well as, the mixing energy of the Zr-Nb system. Furthermore, we have proposed a simple model for the study of the hydrogen diffusion (DH) mediated by interstitial mechanism in hcp Zr. We find that interstitial hydrogen diffuses isotropically according to DH=1.1×10−7exp(−42 KJ.mol−1/RT)(m2/s). Our results are in good agreement with experimental data and other Kinetic Monte Carlo (KMC) calculations. Finally, the formation energies of the three most stable hydrides in the hcp Zr phase were also calculated.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"65 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85790248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-15DOI: 10.31527/analesafa.2021.32.4.88
A. Ipiña, G. López-Padilla, A.L. Fisanotti, M. Dávalos, R. Piacentini
In the last years, the study of vitamin D has raised due to the increase in the incidence of people who have deficientlevels of this vitamin. Few foods contain vitamina D3naturally, the main source of obtaining the ultraviolet (UV)solar radiation, which triggers the synthesis on the skin’s surface. In this study, the effective UV solar irradiance forthe synthesis of pre-vitamin D3was determined in Rosario city, Argentina, using three methods: a) ProportionalityCoefficient, b) Herman’s equation and c) TUV model. The values were compared in clear sky conditions at solar noon.The Solar Exposure Times (TES) that reach the minimum doses of solar UV radiation for the synthesis of pre-vitaminD3and erythema were calculated, along the period june 2019 - may 2020. The variation of the TES to accumulate theminimum dose of pre-vitamin D3and erythema with a photoexposure of 25 % of the body (face, neck and arms) isdiscussed.
{"title":"ANALYSIS OF THE UV SOLAR IRRADIANCE FOR THE SYNTHESIS OF PRE-VITAMIN D3 ON THE SKIN, IN ROSARIO, ARGENTINA","authors":"A. Ipiña, G. López-Padilla, A.L. Fisanotti, M. Dávalos, R. Piacentini","doi":"10.31527/analesafa.2021.32.4.88","DOIUrl":"https://doi.org/10.31527/analesafa.2021.32.4.88","url":null,"abstract":"In the last years, the study of vitamin D has raised due to the increase in the incidence of people who have deficientlevels of this vitamin. Few foods contain vitamina D3naturally, the main source of obtaining the ultraviolet (UV)solar radiation, which triggers the synthesis on the skin’s surface. In this study, the effective UV solar irradiance forthe synthesis of pre-vitamin D3was determined in Rosario city, Argentina, using three methods: a) ProportionalityCoefficient, b) Herman’s equation and c) TUV model. The values were compared in clear sky conditions at solar noon.The Solar Exposure Times (TES) that reach the minimum doses of solar UV radiation for the synthesis of pre-vitaminD3and erythema were calculated, along the period june 2019 - may 2020. The variation of the TES to accumulate theminimum dose of pre-vitamin D3and erythema with a photoexposure of 25 % of the body (face, neck and arms) isdiscussed.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"14 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87776486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-15DOI: 10.31527/analesafa.2021.32.4.99
P. Pardini
Biological tissues have the particularity of allowing light between 600 and 900 nm, within a range called optical window, to penetrate them a few centimeters. This characteristic arouses interest in the near-infrared light for its use as a diagnosis tool, with the characteristic of being non-invasive, its application in breast diagnosis is of particular interest for this study. These tissues do not allow the propagation of light in this spectral range in a rectilinear manner, but rather appear as diffusive, thus deteriorating the spatial resolution of the images that can be obtained from them. In this way, it is necessary to develop experimental techniques and specific data analysis strategies in order to obtain optical information from them. Breast tissue can suffer different types of lesions, such as tumors or cysts. This work presents the study of phantoms, which reproduce their optical properties with inclusions that represent tumors and/or cysts, analyzing the influence of the latter, which optical characteristics are non-diffusive, on optical images and the transport of light in these media. The main objective of this work is focused on the 3D localization and optical characterization of translucent heterogeneities in turbid media.
{"title":"STUDY OF DIFFUSIVE MEDIA WITH LOW SCATTERING HETEROGENEITIES","authors":"P. Pardini","doi":"10.31527/analesafa.2021.32.4.99","DOIUrl":"https://doi.org/10.31527/analesafa.2021.32.4.99","url":null,"abstract":"Biological tissues have the particularity of allowing light between 600 and 900 nm, within a range called optical window, to penetrate them a few centimeters. This characteristic arouses interest in the near-infrared light for its use as a diagnosis tool, with the characteristic of being non-invasive, its application in breast diagnosis is of particular interest for this study. These tissues do not allow the propagation of light in this spectral range in a rectilinear manner, but rather appear as diffusive, thus deteriorating the spatial resolution of the images that can be obtained from them. In this way, it is necessary to develop experimental techniques and specific data analysis strategies in order to obtain optical information from them. Breast tissue can suffer different types of lesions, such as tumors or cysts. This work presents the study of phantoms, which reproduce their optical properties with inclusions that represent tumors and/or cysts, analyzing the influence of the latter, which optical characteristics are non-diffusive, on optical images and the transport of light in these media. The main objective of this work is focused on the 3D localization and optical characterization of translucent heterogeneities in turbid media.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"16 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82554528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.31527/analesafa.2022.33.1.12
M. Kychenthal, L. Morales
For almost 30 years the Lu & Hamilton avalanche model (LH91) has been the paramount tool to study the intermittent nature of solar flares via avalanche models. In this work, we used the two-dimensional model of Lu & Hamilton to assess the statistics of the waiting time between avalanches and the possibility of forecasting synthetic solar flares. We worked with three different definitions of waiting time between∆T,∆Tiiand∆TP. For the case of the usual definition of the waiting time between avalanches (∆T) we found that the statistics can be described statistically through an exponential function. For the other definitions, they present power-law statistics with exponents that compare well with solar observations.
{"title":"SOLAR FLARES: WAITING TIME CHARACTERIZATION USING A CELLULAR AUTOMATON MODEL","authors":"M. Kychenthal, L. Morales","doi":"10.31527/analesafa.2022.33.1.12","DOIUrl":"https://doi.org/10.31527/analesafa.2022.33.1.12","url":null,"abstract":"For almost 30 years the Lu & Hamilton avalanche model (LH91) has been the paramount tool to study the intermittent nature of solar flares via avalanche models. In this work, we used the two-dimensional model of Lu & Hamilton to assess the statistics of the waiting time between avalanches and the possibility of forecasting synthetic solar flares. We worked with three different definitions of waiting time between∆T,∆Tiiand∆TP. For the case of the usual definition of the waiting time between avalanches (∆T) we found that the statistics can be described statistically through an exponential function. For the other definitions, they present power-law statistics with exponents that compare well with solar observations.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"144 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82041414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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