The CMS-HF quartz fiber calorimeters

Penzo, A.; Onel, Y.

doi:10.1088/1742-6596/160/1/012014

Cited by 12 publications

(9 citation statements)

References 18 publications

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“…The sol-gel technique was proven to allow good control, at a relatively low densification temperature, of incorporation of RE ions and of their dispersion inside a glass matrix [27,28]: the glass synthesis can be performed with use of high-purity precursors, reducing the level of unwanted impurities, which is an essential feature for the radiation hardness of such materials. Several studies were devoted to the realization of RE-doped silica glasses prepared by the sol-gel route for HEP applications [29,30]. Previous results proved that sol-gel silica-based fibers can be considered a good scintillator material with a suitable attenuation length: however, their radiation hardness has still to be optimized for applications in HEP experiments with very high levels of radiation [31].…”

Section: Introductionmentioning

confidence: 99%

Dual Cherenkov and Scintillation Response to High-Energy Electrons of Rare-Earth-Doped Silica Fibers

et al. 2019

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The investigation of the characteristic luminescent response of Ce-doped silica fibers exposed to electrons in the 20-200-GeV energy range is reported in this work to explore the feasibility of using silica-based fibers for a simultaneous dual-readout approach. The sol-gel method allows the preparation of either doped or undoped fibers with high aspect ratio and high purity, providing good flexibility and spatial resolution for the realization of a dual-readout detector. The dual Cherenkov and scintillation light emitted by silica-based fibers potentially offers applications in high-energy-physics calorimetry as well as in other fields, such as radiation monitoring in medicine, security, and industrial control. The response of the fibers, embedded in a tungsten-copper absorber block to obtain a spaghetti-like geometry in a high-energyphysics environment, is investigated through a test-beam campaign at the CERN Super Proton Synchrotron facility. The discrimination of Cherenkov and scintillation light is demonstrated and discussed, along with a detailed investigation of the scintillation properties of the material: time-resolved spectroscopy, relative light output, and attenuation length are evaluated. The results presented in this study can pave the way for further material engineering and future applications.

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Section: Introductionmentioning

confidence: 99%

Dual Cherenkov and Scintillation Response to High-Energy Electrons of Rare-Earth-Doped Silica Fibers

et al. 2019

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“…Today BRIL operates several detectors based on different physical principles and technologies. For example, the Hadron Forward Calorimeter (HF) [2] registers the Cherenkov radiation in quartz fibers that is induced when a charged particle passes through them. The Pixel Luminosity Telescope (PLT) [3] is based on silicon sensors and it counts three-plane coincident events online.…”

Section: Introductionmentioning

confidence: 99%

Beam-dynamic effects at the CMS BRIL van der Meer scans

Babaev

2018

J. Inst.

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The CMS Beam Radiation Instrumentation and Luminosity Project (BRIL) is responsible for the simulation and measurement of luminosity, beam conditions and radiation fields in the CMS experiment. The project is engaged in operating and developing new detectors (luminometers), adequate for the experimental conditions associated with high values of instantaneous luminosity delivered by the CERN LHC. BRIL operates several detectors based on different physical principles and technologies. Precise and accurate measurements of the delivered luminosity is of paramount importance for the CMS physics program. The absolute calibration of luminosity is achieved by the van der Meer method, which is carried out under specially tailored conditions. This paper presents models used to simulate of beam-dynamic effects arising due to the electromagnetic interaction of colliding bunches. These effects include beam-beam deflection and dynamic-beta effect. Both effects are important to luminosity measurements and influence calibration constants at the level of 1-2%. The simulations are carried out based on 2016 CMS van der Meer scan data for proton-proton collisions at a center-of-mass energy of 13 TeV.

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“…Glass fibers could be applied also as wavelength shifters for the collection and transport of scintillation light in High Energy Physics (HEP) experiments [5]. Moreover, and in parallel with undoped fibers exploiting Cherenkov light [6], the use of RE-doped fibers as scintillators in HEP detectors has been recently proposed as active materials in a sampling SPACAL-like electromagnetic calorimeter [7,8] or as the scintillating component in a dual-readout calorimeter [9,10].…”

Section: Introductionmentioning

confidence: 99%

Optical properties and radiation hardness of Pr-doped sol-gel silica: Influence of fiber drawing process

Cova

Fasoli

Moretti

et al. 2017

Journal of Luminescence

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Optical properties and radiation hardness of Pr-doped sol-gel silica: Influence of fiber drawing process (2017) J. Lumin, vol. 192, p. 661-667 doi: 10.1016Lumin, vol. 192, p. 661-667 doi: 10. /j.jlumin.2017 Publisher's version of the article can be found at the following site: http://www.sciencedirect.com/science/article/pii/S0022231317307949 A complete and detailed characterization of the optical, scintillation and radiation hardness properties of Pr-doped silica is carried out employing different experimental techniques including steady-state and time-resolved photo-luminescence, radio-and thermo-luminescence, scintillation and optical absorption.Optical absorption measurements, performed after X-ray irradiation sequences up to 1 kGy, evidence the formation of radiation-induced absorption bands related to point defects acting as color centers. Spontaneous partial recovery of the radiation-induced defects at room temperature, as well as after thermal treatments, is also disclosed.Particular attention is paid to the comparison between bulk silica, both before and after a melting process, and fibers. The results reveal the presence of a lower concentration of optically active defects in melted glass. Such comparison highlights a role of the fiber drawing in modifying the glass defectiveness, consisting in the occurrence of a structural reorganization of the amorphous network during the process.

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The CMS-HF quartz fiber calorimeters

Cited by 12 publications

References 18 publications

Dual Cherenkov and Scintillation Response to High-Energy Electrons of Rare-Earth-Doped Silica Fibers

Dual Cherenkov and Scintillation Response to High-Energy Electrons of Rare-Earth-Doped Silica Fibers

Beam-dynamic effects at the CMS BRIL van der Meer scans

Optical properties and radiation hardness of Pr-doped sol-gel silica: Influence of fiber drawing process

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