Distributed Optical Fiber Radiation Sensing in the Proton Synchrotron Booster at CERN

D. Di Francesca; I. Toccafondo; G. Li Vecchi; S. Calderini; S. Girard; A. Alessi; R. Ferraro; S. Danzeca; Y. Kadi; M. Brugger

doi:10.1109/TNS.2018.2818760

Distributed Optical Fiber Radiation Sensing in the Proton Synchrotron Booster at CERN

D. Di Francesca
, I. Toccafondo
, G. Li Vecchi
, S. Calderini
, S. Girard
, A. Alessi
, R. Ferraro
, S. Danzeca
, Y. Kadi
, M. Brugger

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, we report on the development and first deployment of a distributed optical fiber radiation sensor (DOFRS) for the online monitoring of radiation levels in the high-energy accelerator facilities of CERN. The DOFRS is composed of two basic parts: a set of suitably chosen radiation sensitive optical fibers (OFs), to be installed in the machine tunnel, and an optical time domain reflectometer (OTDR), to be installed in a radiation-free area. We carried out a calibration of the radiation response of a P-doped multimode OF under ⁶⁰Co γ -rays and in the mixed-field radiation environment of the CHARM facility at CERN. By performing OTDR measurements, we are able to probe the radiation-induced attenuation in the OF along its length and calculate the deposited radiation dose with a spatial resolution of 1 m. In this paper, we describe the main features associated with DOFRS implementation in the proton synchrotron booster (PSB) at CERN. We also report the first results obtained from the monitoring of PSB radiation levels since its recommissioning in April 2017. The performances and advantages of the DOFRS system are discussed.

Original language	English
Article number	8323397
Pages (from-to)	1639-1644
Number of pages	6
Journal	IEEE Transactions on Nuclear Science
Volume	65
Issue number	8
DOIs	https://doi.org/10.1109/TNS.2018.2818760
Publication status	Published - 1 Aug 2018
Externally published	Yes

Keywords

Accelerator
distributed radiation sensor
mixed field radiation
optical fiber
radiation-induced attenuation (RIA)

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10.1109/TNS.2018.2818760

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@article{870b3ada8a2644b88bb3a52e61285ab6,

title = "Distributed Optical Fiber Radiation Sensing in the Proton Synchrotron Booster at CERN",

abstract = "In this paper, we report on the development and first deployment of a distributed optical fiber radiation sensor (DOFRS) for the online monitoring of radiation levels in the high-energy accelerator facilities of CERN. The DOFRS is composed of two basic parts: a set of suitably chosen radiation sensitive optical fibers (OFs), to be installed in the machine tunnel, and an optical time domain reflectometer (OTDR), to be installed in a radiation-free area. We carried out a calibration of the radiation response of a P-doped multimode OF under 60Co γ -rays and in the mixed-field radiation environment of the CHARM facility at CERN. By performing OTDR measurements, we are able to probe the radiation-induced attenuation in the OF along its length and calculate the deposited radiation dose with a spatial resolution of 1 m. In this paper, we describe the main features associated with DOFRS implementation in the proton synchrotron booster (PSB) at CERN. We also report the first results obtained from the monitoring of PSB radiation levels since its recommissioning in April 2017. The performances and advantages of the DOFRS system are discussed.",

keywords = "Accelerator, distributed radiation sensor, mixed field radiation, optical fiber, radiation-induced attenuation (RIA)",

author = "\{Di Francesca\}, D. and I. Toccafondo and \{Li Vecchi\}, G. and S. Calderini and S. Girard and A. Alessi and R. Ferraro and S. Danzeca and Y. Kadi and M. Brugger",

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year = "2018",

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doi = "10.1109/TNS.2018.2818760",

language = "English",

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AU - Di Francesca, D.

AU - Toccafondo, I.

AU - Li Vecchi, G.

AU - Calderini, S.

AU - Girard, S.

AU - Alessi, A.

AU - Ferraro, R.

AU - Danzeca, S.

AU - Kadi, Y.

AU - Brugger, M.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - In this paper, we report on the development and first deployment of a distributed optical fiber radiation sensor (DOFRS) for the online monitoring of radiation levels in the high-energy accelerator facilities of CERN. The DOFRS is composed of two basic parts: a set of suitably chosen radiation sensitive optical fibers (OFs), to be installed in the machine tunnel, and an optical time domain reflectometer (OTDR), to be installed in a radiation-free area. We carried out a calibration of the radiation response of a P-doped multimode OF under 60Co γ -rays and in the mixed-field radiation environment of the CHARM facility at CERN. By performing OTDR measurements, we are able to probe the radiation-induced attenuation in the OF along its length and calculate the deposited radiation dose with a spatial resolution of 1 m. In this paper, we describe the main features associated with DOFRS implementation in the proton synchrotron booster (PSB) at CERN. We also report the first results obtained from the monitoring of PSB radiation levels since its recommissioning in April 2017. The performances and advantages of the DOFRS system are discussed.

AB - In this paper, we report on the development and first deployment of a distributed optical fiber radiation sensor (DOFRS) for the online monitoring of radiation levels in the high-energy accelerator facilities of CERN. The DOFRS is composed of two basic parts: a set of suitably chosen radiation sensitive optical fibers (OFs), to be installed in the machine tunnel, and an optical time domain reflectometer (OTDR), to be installed in a radiation-free area. We carried out a calibration of the radiation response of a P-doped multimode OF under 60Co γ -rays and in the mixed-field radiation environment of the CHARM facility at CERN. By performing OTDR measurements, we are able to probe the radiation-induced attenuation in the OF along its length and calculate the deposited radiation dose with a spatial resolution of 1 m. In this paper, we describe the main features associated with DOFRS implementation in the proton synchrotron booster (PSB) at CERN. We also report the first results obtained from the monitoring of PSB radiation levels since its recommissioning in April 2017. The performances and advantages of the DOFRS system are discussed.

KW - Accelerator

KW - distributed radiation sensor

KW - mixed field radiation

KW - optical fiber

KW - radiation-induced attenuation (RIA)

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DO - 10.1109/TNS.2018.2818760

M3 - Article

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SN - 0018-9499

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JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

IS - 8

M1 - 8323397

ER -

Distributed Optical Fiber Radiation Sensing in the Proton Synchrotron Booster at CERN

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Keywords

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