Fiber optic microprobes with rare-earth-based phosphor tips for proton beam characterization

AbstractAlthough discovered over 150 years ago, it was not until the 1970's that materials were developed that enabled magneto-optic (Faraday) effect devices of practical sizes. These developments are: magneto-optic materials with high Verdet constants, and the rare-earth magnet materials, capable of extremely high magnetic fields.The magneto-optic effect has enabled development of equipment used in diverse laser applications, from industrial use to fiber-optic telecommunications.The principle of operation of optical isolators and circulators is described herein, as well as descriptions of critical components in such equipment, such as the polarizers and the magnets.

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Medipix2 as a tool for proton beam characterization

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2009.03.115 ◽

2009 ◽

Vol 607 (1) ◽

pp. 48-50 ◽

Cited By ~ 4

Author(s):

M.G. Bisogni ◽

G.A.P. Cirrone ◽

G. Cuttone ◽

A. Del Guerra ◽

P. Lojacono ◽

...

Keyword(s):

Proton Beam ◽

Beam Characterization

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Rare earth doped intrinsic fiber optic sensors for high temperature measurement up to 1100°C

12th International Conference on Optical Fiber Sensors ◽

10.1364/ofs.1997.othc38 ◽

1997 ◽

Author(s):

Z Y Zhang ◽

K T V Grattan ◽

A W Palmer ◽

T Sun ◽

B T Meggitt

Keyword(s):

Rare Earth ◽

High Temperature ◽

Temperature Measurement ◽

Fiber Optic ◽

Fiber Optic Sensors ◽

High Temperature Measurement ◽

Rare Earth Doped

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Measurement of Therapeutic Proton Beam Using a Fiber-Optic Cerenkov Radiation Sensor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1033-1034.431 ◽

2014 ◽

Vol 1033-1034 ◽

pp. 431-434

Author(s):

Seon Guen Kim ◽

Kyoung Won Jang ◽

Sang Hun Shin ◽

Seung Han Hong ◽

Hyeok In Sim ◽

...

Keyword(s):

Side Effects ◽

Proton Beam ◽

Fiber Optic ◽

Tumor Therapy ◽

High Energy ◽

Exposure Dose ◽

Cerenkov Radiation ◽

High Energy Radiation ◽

Energy Radiation ◽

Radiation Sensor

Tumor therapy using the high-energy radiation has evolved over the decades as typical non-invasive treatment method due to its advantage compared with surgery. But, the radiotherapy can damage or destroy normal cells as well as destroying tumor cells and cause side effects of treatment. Even though most side effects are temporary, these effects can be extremely fatal for patient. Therefore, the exact measurement of the exposure dose of patient during radiation therapy is very important for patient safety. In the case of the conventional fiber-optic radiation sensor that consists of a scintillator for high-energy radiation dosimetry, additional correction is necessary due to the quenching effects of the scintillator. In this study, we measured the exposure dose of the high-energy proton beam without the scintillator by using the Cerenkov radiation that generated inside the plastic optical fiber. As a result of this study, we confirmed a Bragg peak of the proton beam without a scintillator. Also it was in good agreement with the result of the ionization chamber.

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