Experimental study of source of background noise in muon radiography using emulsion film detectors

Nishiyama, Ryuichi; Miyamoto, Seigo; Naganawa, N.

doi:10.5194/gi-3-29-2014

Cited by 30 publications

(44 citation statements)

References 22 publications

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“…A study published in Nishiyama et al [] leads to very similar results to the MU‐RAY and TOMUVOL measurements presented here. That study used two emulsion‐based detectors with different momentum thresholds (0.2 and 2 GeV/c) and demonstrated that low‐energy particles dominate the background population.…”

Section: Discussionsupporting

confidence: 88%

Joint measurement of the atmospheric muon flux through the Puy de Dôme volcano with plastic scintillators and Resistive Plate Chambers detectors

et al. 2015

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The muographic imaging of volcanoes relies on the measured transmittance of the atmospheric muon flux through the target. An important bias affecting the result comes from background contamination mimicking a higher transmittance. The MU‐RAY and TOMUVOL collaborations measured independently in 2013 the atmospheric muon flux transmitted through the Puy de Dôme volcano using their early prototype detectors, based on plastic scintillators and on Glass Resistive Plate Chambers, respectively. These detectors had three (MU‐RAY) or four (TOMUVOL) detection layers of 1 m2 each, tens (MU‐RAY) or hundreds (TOMUVOL) of nanosecond time resolution, a few millimeter position resolution, an energy threshold of few hundreds MeV, and no particle identification capabilities. The prototypes were deployed about 1.3 km away from the summit, where they measured, behind rock depths larger than 1000 m, remnant fluxes of 1.83±0.50(syst)±0.07(stat) m−2 d−1 deg−2 (MU‐RAY) and 1.95±0.16(syst)±0.05(stat) m−2 d−1 deg−2 (TOMUVOL), that roughly correspond to the expected flux of high‐energy atmospheric muons crossing 600 meters water equivalent (mwe) at 18° elevation. This implies that imaging depths larger than 500 mwe from 1 km away using such prototype detectors suffer from an overwhelming background. These measurements confirm that a new generation of detectors with higher momentum threshold, time‐of‐flight measurement, and/or particle identification is needed. The MU‐RAY and TOMUVOL collaborations expect shortly to operate improved detectors, suitable for a robust muographic imaging of kilometer‐scale volcanoes.

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Section: Discussionsupporting

confidence: 88%

Joint measurement of the atmospheric muon flux through the Puy de Dôme volcano with plastic scintillators and Resistive Plate Chambers detectors

et al. 2015

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“…Studies and prospects for such kind of noise are well described in (Jourde et al . ; Nishiyama, Miyamoto, and Naganawa ).…”

Section: Muon Tomographymentioning

confidence: 95%

“…In the experiment described by Nishiyama et al . (), it turned out that the main background sources are low momentum particles. Since the ECC is one of the best tools to filter such background signal, it was used for both detectors at Teide and La Palma islands.…”

Section: Muon Tomographymentioning

confidence: 99%

Cosmic muon imaging: a challenging application to investigate deeper volcanic structures in Canary Islands, Spain

Hernández

Miyamoto

Tiukov

et al. 2016

Near Surface Geophysics

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Muon radiography of volcanoes has become a promising technique to investigate density contrasts in active volcanoes with a spatial resolution unreachable for conventional geophysical techniques. Experiments performed at volcanoes such as Asama, Showa‐Shinzan and Satsuma‐Iwojima, all in Japan, have provided new insights for volcanologists and scientists in general. In this paper, we discuss the very challenging application of muon radiography to investigate deeper volcanic structures such as Teide volcano in Tenerife and Cumbre Vieja in La Palma, Canary Islands, due to the strong social interest emerging from the potential danger which they represent. Applications to other volcanoes can be envisaged. The emulsion films exposed at Canary Islands, as described in this paper, are under analysis and results will soon be available.

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“…Film-to-film alignment and track reconstruction were performed by using the FEDRA framework (Tioukov et al, 2006). We then performed our original track selection (Nishiyama et al, 2014). The signal tracks were selected on the basis of (i) number of hits, (ii) grain density and (iii) straightness of the reconstructed tracks.…”

Section: Track Selectionmentioning

confidence: 99%

Application of Emulsion Cloud Chamber to cosmic-ray muon radiography

Nishiyama

Miyamoto

Naganawa

2015

Radiation Measurements

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Experimental study of source of background noise in muon radiography using emulsion film detectors

Cited by 30 publications

References 22 publications

Joint measurement of the atmospheric muon flux through the Puy de Dôme volcano with plastic scintillators and Resistive Plate Chambers detectors

Joint measurement of the atmospheric muon flux through the Puy de Dôme volcano with plastic scintillators and Resistive Plate Chambers detectors

Cosmic muon imaging: a challenging application to investigate deeper volcanic structures in Canary Islands, Spain

Application of Emulsion Cloud Chamber to cosmic-ray muon radiography

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