Nuclear Emulsions

Lellis, G. De; Ereditato, A.; Niwa, K.

doi:10.1007/978-3-642-03606-4_9

Cited by 50 publications

(20 citation statements)

References 90 publications

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“…The emulsion gel consists of small silver bromide crystals dispersed in a gelatin frame. The most peculiar characteristics of the emulsion gel compared to other photographic emulsions is that the crystal size is extremely small (0.2 µm) [8,9]. This allows for tracing a particle trajectory with unprecedented high spatial resolution (0.5 µm).…”

Section: Emulsion Film Detectorsmentioning

confidence: 99%

“…In particular, the incident muon flux and direction have to be measured with high angular resolution and, at the same time, the detector must be easily portable, possibly devoid of electric power, and requiring minimal maintenance. Nuclear emulsion is a very old technique [8,9], recently revived thanks to the achievement of a fast automatic scanning of particle tracks [10]. This is a key issue for the analysis of large area detectors needed to reach an adequate spatial resolution in mapping the target.…”

Section: Introductionmentioning

confidence: 99%

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A Nuclear Emulsion Detector for the Muon Radiography of a Glacier Structure

Ariga

Ereditato

et al. 2018

Instruments

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Cosmic ray muons can be used to image the interior of geological sites provided that one employs detectors able to operate in the specific harsh conditions of the mountain environment. We designed and developed a detector exploiting the nuclear emulsion technique to assess the bedrock profile underneath an alpine glacier. Nuclear emulsions do not need any electric power supply or maintenance and allow for the measurement of the muon flux and direction behind a large target volume. The 3D density distribution of the material traversed by muons can then be assessed, bringing relevant information on the shape of the boundary between the glacial ice and the underlying bedrock. This new methodology in the geological field was recently tested in a campaign of measurements in the Jungfrau region of the central Swiss Alps. It was shown that the bedrock surface position can be measured with a resolution of about 5% when the traversed target is about 100 m thick. Characteristics and performance of the method are reported here and demonstrate that muon radiography based on emulsion detectors represents a powerful tool for the geological study of glaciers.

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Section: Emulsion Film Detectorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Nuclear Emulsion Detector for the Muon Radiography of a Glacier Structure

Ariga

Ereditato

et al. 2018

Instruments

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“…These are generated by 22 MeV electrons from the linac of the Clinic for Radiation Oncology of the Bern Inselspital. Two detectors are stacked together to form a module that was exposed to cosmic-rays for 1 week. An area of 1cm 2 was scanned for both detectors (a total of four sensitive layers) and the tracking algorithm was then applied to the microscope views.…”

Section: Processmentioning

confidence: 99%

Fast 4π track reconstruction in nuclear emulsion detectors based on GPU technology

Ariga¹,

Ariga²

2014

J. Inst.

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Fast 4π solid angle particle track recognition has been a challenge in particle physics for a long time, especially in using nuclear emulsion detectors. The recent advances in computing technology opened the way for its realization. A fast 4π solid angle particle track reconstruction based on GPU technology combined with a multithread programming is reported here with a detailed comparison of processing time by CPUs with respect to using GPUs. By employing 3 state-of-the-art GPUs with a multithread programming, a 60 times faster processing of 3D emulsion detector data has been achieved with an excellent tracking performance in comparison with a single-thread CPU processing, corresponding to processing of 15 cm 2 emulsion surface scanned per hour.

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“…Nuclear emulsions are among the first particle detectors that led physicists to important discoveries, thanks to their unbeatable sub-micrometric position resolution. Today's nuclear emulsions are based on the modern, industrial photographic film technology developed in the last years [2]. The basic detector unit is a silver bromide crystal with a typical size of 0.2 µm, uniformly distributed in an emulsion layer, and characterized by an energy band gap of 2.6 eV.…”

Section: Emulsion Detector Developmentsmentioning

confidence: 99%

A new application of emulsions to measure the gravitational force on antihydrogen

Amsler¹,

Ariga²,

Ariga³

et al. 2013

J. Inst.

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We propose to build and operate a detector based on the emulsion film technology for the measurement of the gravitational acceleration on antimatter, to be performed by the AEgIS experiment (AD6) at CERN. The goal of AEgIS is to test the weak equivalence principle with a precision of 1% on the gravitational acceleration g by measuring the vertical position of the annihilation vertex of antihydrogen atoms after their free fall in a horizontal vacuum pipe. With the emulsion technology developed at the University of Bern we propose to improve the performance of AEgIS by exploiting the superior position resolution of emulsion films over other particle detectors. The idea is to use a new type of emulsion films, especially developed for applications in vacuum, to yield a spatial resolution of the order of one micron in the measurement of the sag of the antihydrogen atoms in the gravitational field. This is an order of magnitude better than what was planned in the original AEgIS proposal.

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Nuclear Emulsions

Cited by 50 publications

References 90 publications

A Nuclear Emulsion Detector for the Muon Radiography of a Glacier Structure

A Nuclear Emulsion Detector for the Muon Radiography of a Glacier Structure

Fast 4π track reconstruction in nuclear emulsion detectors based on GPU technology

A new application of emulsions to measure the gravitational force on antihydrogen

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