Electron beam diagnostics tool based on Cherenkov radiation in optical fibers

Vukolov, A. V.; Novokshonov, Artem; Потылицын, А. П.; Uglov, S. R.

doi:10.1088/1742-6596/732/1/012011

Cited by 4 publications

(3 citation statements)

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“…For example, the feasibility of transverse electron beam profile measurements for a few MeV energy and low intensity beams using CR generated in a bulk of optical fibers was demonstrated in experiments presented in. 14) The main advantage of this technique is the perpendicular orientation of the fiber relative to the electron beam propagation direction. It means that there are no distortions of experimental results in comparison with the case when the fiber is inclined at the Cherenkov angle.…”

Section: Introductionmentioning

confidence: 99%

Cherenkov radiation and cathodoluminescence in sapphire, quartz, and diamond under the excitation of an electron beam

Тарасенко¹,

Бакшт²,

Белоплотов³

et al. 2020

Jpn. J. Appl. Phys.

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The paper reports data on the emission of sapphire, KU-1 quartz, and synthetic diamond in the wavelength range of 200–800 nm excited by a pulsed electron beam with an energy of up to 350 keV. Broadband radiation, the intensity of which increases with decreasing wavelength in the range of 220–400 nm, was detected. Such dependence of the radiation intensity on the wavelength is characteristic of Cherenkov radiation (CR). Moreover, the duration of the radiation pulse coincides with that of the electron beam current pulse. For sapphire and quartz, the duration of radiation pulses at the spectral range 220–400 nm is close to the duration to electron beam current pulses. For synthetic diamonds, both cathodoluminescence and CR are detected in this spectral region. The intense band of free excitons with maximum at 235 nm is found at high beam current densities and electron energies 50–350 keV.

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Section: Introductionmentioning

confidence: 99%

Cherenkov radiation and cathodoluminescence in sapphire, quartz, and diamond under the excitation of an electron beam

Тарасенко¹,

Бакшт²,

Белоплотов³

et al. 2020

Jpn. J. Appl. Phys.

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“…Clinical imaging of radiotracers takes advantage of Cherenkov light, and provides a compliment to positron emission tomography imaging [10]. Electron beam relative dosimetry has also been performed using Cherenkov light and showed favorable results [11] [12]. However, when a separate light source is being measured (for example in scintillator dosimetry) any Cherenkov light generated will contaminate the light signal intended to be measured.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in photonic dosimeters for medical radiation therapy

Archer

2018

Front. Optoelectron.

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Radiation therapy, which uses X-rays to destroy or injure cancer cells, has become one of the most important modalities to treat the primary cancer or advanced cancer. High resolution, water equivalent and passive X-ray dosimeters are highly desirable for developing quality assurance (QA) systems for novel cancer therapy like microbeam radiation therapy (MRT) which is currently under development. Here we present the latest developments of high spatial resolution scintillator based photonic dosimeters, and their applications to clinical external radiation beam therapies: specifically high energy linear accelerator (LINAC) photon beams and low energy synchrotron photon beams. We have developed optical fiber dosimeters with spatial resolutions ranging from 50 to 500 mm and tested them with LINAC beams and synchrotron microbeams. For LINAC beams, the fiberoptic probes were exposed to a 6 MV, 10 cm by 10 cm Xray field and, the beam profiles as well as the depth dose profiles were measured at a source-tosurface distance (SSD) of 100 cm. We have also demonstrated the possibility for temporally separating Cherenkov light from the pulsed LINAC scintillation signals. Using the 50 mm fiber probes, we have successfully resolved the microstructures of the microbeams generated by the imaging and medical beamline (IMBL) at the Australian Synchrotron and measured the peak-to-valley dose ratios (PVDRs). In this paper, we summarize the results we have achieved so far, and discuss the possible solutions to the issues and challenges we have faced, also highlight the future work to further enhance the performances of the photonic dosimeters.

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“…For example, this type of radiation occurs when the Coulomb field of a relativistic charge interacts with dielectric fiber. The optical fibers, in which radiation is generated by passing a charged particle through fiber material, have been already applied for the beam loss monitors [4,5] and for transverse beam profile diagnostics [6,7]. Essential restriction on the application of optical fibers for beam diagnostics is fiber optical property modification induced by the electron beam.…”

Section: Introductionmentioning

confidence: 99%