Fibre optic radiation sensor systems for particle accelerators

Henschel, H.; Körfer, M.; Kuhnhenn, J.; Weinand, U.; Wulf, F.

doi:10.1016/j.nima.2004.02.030

Cited by 59 publications

(38 citation statements)

References 22 publications

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“…Furthermore, RIA in the infrared part of the spectrum appears to be only slightly influenced by the dose rate [6]. These unique properties of P-doped fibers in the 850 nm-1600 nm range can be used for in situ fiberbased dosimetry systems as previously studied by Fraunhofer Institute or SCK-CEN research groups [11,12].…”

Section: Introductionmentioning

confidence: 85%

Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain

Girard

Ouerdane

Marcandella

et al. 2011

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 85%

Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain

Girard

Ouerdane

Marcandella

et al. 2011

Journal of Non-Crystalline Solids

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“…The presence of such point defects makes the response of any type of fiber a specific field of investigation. So while pure silica, F-doped, and N-doped fibers are relevant in temperature and strain sensors in harsh environments, Al and P-doped fibers are promising candidates as dosimeters [9,[109][110][111][112][113][114][115][116][117][118]. In the first case, the radiation hardness is fundamental, since low RIA gives the opportunity for long-range transmission and to produce point or distributed sensors, eventually with large sensing ranges.…”

Section: Advantages and Disadvantages Of The Radiation-induced Attenumentioning

confidence: 99%

The Relevance of Point Defects in Studying Silica-Based Materials from Bulk to Nanosystems

et al. 2019

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The macroscopic properties of silica can be modified by the presence of local microscopic modifications at the scale of the basic molecular units (point defects). Such defects can be generated during the production of glass, devices, or by the environments where the latter have to operate, impacting on the devices’ performance. For these reasons, the identification of defects, their generation processes, and the knowledge of their electrical and optical features are relevant for microelectronics and optoelectronics. The aim of this manuscript is to report some examples of how defects can be generated, how they can impact device performance, and how a defect species or a physical phenomenon that is a disadvantage in some fields can be used as an advantage in others.

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“…Finally, Phosphorous (P) doped or co-doped fibers are known to have several key features which make them particularly attractive for radiation sensing [9] [10]. Their response to the dose is linear over a very wide range from mGy up to a couple of kGy after which they generally start to saturate reaching saturation around 100 kGy.…”

Section: Icso 2014mentioning

confidence: 99%

First steps towards a distributed optical fiber radiation sensing system

Toccafondo

Brügger

Pasquale

et al. 2017

International Conference on Space Optics — ICSO 2014

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Ionizing radiations affect installed electronics, limit equipment lifetimes and eventually alter materials both in space applications as well as high energy accelerators and physics experiments. In order to monitor radiation levels and predict equipment and material lifetimes, an accurate radiation dosimetry is highly important and very challenging often due to two main reasons: (i) large areas and (ii) extended dose range of interest. In this respect a radiation sensor based on a distributed optical fiber sensing system could be a promising solution. Such sensor systems are immune to electromagnetic field interference, have a light weight and small size making them suitable for a large number of applications including possible future space missions. In addition, optical fiber sensors have reached a very high accuracy in measuring physical quantities as a function of distance very accurately with metre or sub-metre-scale spatial resolutions. Their distributed nature in fact, is particularly suitable for real-time monitoring of long distances as particles accelerator tunnels like the one of the Large Hadron Collider (LHC) or large space stations as the International Space Station (ISS) which, to the best of our knowledge, only holds punctual radiation sensors as passive radiation dosimeters (PRD) among many others. The first step of the feasibility study of a distributed optical fiber radiation sensing system consists in characterizing and selecting the most suitable optical fiber which represents the sensing mean of the system. The effect of ionizing radiation on optical fibers has been well documented in literature and already several decades ago it was known that an irradiated fiber will suffer from radiation induced attenuation (RIA). Depending on the fiber’s type and composition the RIA shows varying response to total dose, dose rate, temperature, wavelength and light power. In the case of P-doped fibers, the radiation response is independent from the dose rate the fiber is exposed to, which makes it suitable for sensing a wide range of different radiation environments. Moreover, P-doped fibers have a low annealing behavior and their RIA doesn’t show any strong temperature dependence for room temperature environments. All the above mentioned parameters affecting the RIA are important in order to fully characterize fiber candidates to be used for dosimetry and will be detailed in the next section. Based on the above considerations, in this paper we investigate the response to ionizing radiation of three different P-doped optical fibers which could be suitable candidates for the radiation sensing system. Two of the fibers were single mode (SM) and the RIA has been studied at 1312 nm and 1570 nm as a function of the total dose up to about 18 kGy and with a dose rate of 46.7 mGy/s in one case and almost 60 kGy at 153 mGy/s in the other. The third fiber which was a multimode (MM) one has been tested at 830 nm and 1312 nm and has been irradiated with dose rates ranging from 0.5 mGy/s up to almost 1.7 Gy/s reaching ...

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Fibre optic radiation sensor systems for particle accelerators

Cited by 59 publications

References 22 publications

Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain

Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain

The Relevance of Point Defects in Studying Silica-Based Materials from Bulk to Nanosystems

First steps towards a distributed optical fiber radiation sensing system

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