scholarly journals Development of Analysis Method using GEANT4 for Cosmic Ray Radiography

2017 ◽  
Author(s):  
Mitsuaki Kuno ◽  
Kunihiro Morishima ◽  
Akira Nishio ◽  
Yuta Manabe ◽  
Nobuko Kitagawa
Keyword(s):  
Cosmic Ray ◽  
Analysis Method

scholarly journals THE ATMOSPHERIC PRESSURE EFFECT ON MUON DATA NORMALIZATION BY SPECTRAL ANALYSIS STUDIES

2013 ◽  
Vol 31 (3) ◽  
pp. 507 ◽  
Author(s):  
Nivaor Rodolfo Rigozo ◽  
Adriano Petry
Keyword(s):  
Time Series ◽  
Spectral Analysis ◽  
Atmospheric Pressure ◽  
Amplitude Spectrum ◽  
Cosmic Ray ◽  
Pressure Effects ◽  
Pressure Amplitude ◽  
Analysis Method ◽  
Amplitude Spectra ◽  
Spectral Analysis Method

ABSTRACT. This paper presents a study of the atmospheric pressure effects on ground cosmic ray muon time series, using the iterative regression spectral analysis method. Along the study, it was observed that the 34 periods present in the atmospheric pressure amplitude spectrum are present in the muon data amplitude spectra as well. It was concluded that the normalization of muon data is only efficient for periods shorter than nine days, in order to eliminate the atmospheric effects.Keywords: cosmic rays, time series, spectral analysis. RESUMO. Este artigo apresenta um estudo dos efeitos da pressão atmosférica nas series temporais de raios cósmicos, usando a metodologia da análise espectral pela iteração regressiva. Foi observado um total de 34 periodicidades presentes no espectro de amplitude da pressão atmosférica que também estão presentes no espectro de amplitude dos dados de muons. Conclui-se que a padronização dos dados de muons para eliminar os efeitos da pressão atmosférica é eficiente somente para períodos abaixo de 9 diasPalavras-chave: raios cósmicos, série temporal, análise espectral.

Three-dimensional Density Reconstruction Analysis Method for Omni-directional Muography

2020 ◽  
Author(s):  
Seigo Miyamoto ◽  
Shogo Nagahara
Keyword(s):  
Spatial Resolution ◽  
Three Dimensional ◽  
Cosmic Ray ◽  
Inversion Method ◽  
Density Structure ◽  
Back Projection ◽  
Analysis Method ◽  
Filtered Back Projection ◽  
Linear Inversion ◽  
Reconstruction Methods

<p>Muography is the technique to observe the inner density structure of volcano by using cosmic-ray muons. In previous study, three-dimensional density reconstruction was attempted by using muography data from multiple directions (Tanaka et al., 2010, Rosas-Carbajal et al., 2017), but they could only get a few hundred meters of spatial resolution. To improve the spatial resolution, Nagahara and Miyamoto (2018) suggested omni-directional muography, putting ten or more observation points to surround the volcano.</p><p>  There are two types of three-dimensional density reconstruction methods from omni-directional muography observations, the linear inversion method (Rosas-Carbajal et al., 2017) and the filtered back projection (FBP) method (Nagahara and Miyamoto, 2018). The former is applicable even when the number of observation points is small, but requires many arbitrary parameters, while the latter has the characteristic that no arbitrary parameters are required but a certain number of observation points is required.</p><p>In this presentation, we show the results of a comparison between the two methods in simulation.</p>

Demonstration of 11-directional muography in Omuro-yama Scoria cone, Izu, Japan

2020 ◽  
Author(s):  
Shogo Nagahara ◽  
Seigo Miyamoto ◽  
Kunihiro Morishima ◽  
Toshiyuki Nakano ◽  
Masato Koyama ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Three Dimensional ◽  
Cosmic Ray ◽  
Scoria Cone ◽  
Density Structure ◽  
Analysis Method ◽  
Future Plan ◽  
Lack Of Information ◽  
Baseline Diameter ◽  
Observation Results

<p>Muography is the method of determining inner bulk density structures of volcano by using cosmic-ray muons. When we get muography image from one direction, there is no spatial resolution along muon path. However, by observing from multiple directions, three-dimensional density structure can be obtained. In recent years, three-dimensional density reconstruction using two or three muographic images has been performed (Tanaka et al., 2010, Rosas-Carbajal et al., 2017), but they obtained three-dimensional density structure with only several hundreds of meters spatial resolution due to lack of information. To improve the spatial resolution, we suggested “omni-directional muography”, putting ten or more observation points to surround the volcano (Nagahara and Miyamoto, 2018), and we estimated its feasibility by simulation. On the other hand, in recent years, detectors for muography have become larger (Morishima et al., 2018, Olah et al., 2019), and a detector necessary for omni-directional muography can be prepared. Therefore, we demonstrated omni-directional muography in Omuro-yama Scoria cone, Izu, Japan.</p><p>Omuro-yama is a scoria cone formed by a single eruption. The mountain baseline diameter is about 1 kilometer and the height from base is 300 meters. The eruption has been investigated by sediment surveys (Koyano et al.,1996). This mountain has many advantages that are suitable for omnidirectional muography. 1) no mountains around Omuroyama, so no contamination of muon path except in the Omuroyama body. 2) easy to access the detector sites, 3) enough statistics of penetrating muons because of size. We started observing Omuro-yama in 2018. In 2018, we observed for two months from three directions using a 0.01 square meter emulsion detector. In 2019, we performed a three-month observation from eight directions using a 0.02 square meter emulsion detector. As a result of preliminary three-dimensional density reconstruction using the analysis method of Nishiyama et al. (2014), a region with a low density over 200 m in diameter was found under the crater. Currently, we are considering this result carefully. We plan to observe from 30 directions by 2021, including 11 points.</p><p>In this presentation, we report the latest analysis results of observation results from 11 directions and future plan.</p>

DEVELOPMENT OF THE COSMIC RAY TECHNIQUES

1982 ◽  
Vol 43 (C8) ◽  
pp. C8-69-C8-88 ◽  
Author(s):  
B. Rossi
Keyword(s):  
Cosmic Ray

Impact of analysis method on anthocyanin content of elderberry products

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
C Chrubasik ◽  
T Maier ◽  
M Luond ◽  
A Schieber
Keyword(s):  
Anthocyanin Content ◽  
Analysis Method
Sign in / Sign up

Export Citation Format

Share Document