Scintillation Screen Studies for High-Dose Ion Beam Applications

Gütlich, E.; Forck, P.; Ensinger, Wolfgang; Walasek-Höhne, B.

doi:10.1109/tns.2012.2191797

Cited by 10 publications

(2 citation statements)

References 9 publications

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“…To increase the accuracy and efficiency of data collection, we investigated the feasibility of measuring the tails of the spot profiles directly down to 0.01% of the central dose using a scintillation detector recently developed by IBA-Dosimetry (Schwarzenbruck, Germany) and compared the results to similar measurements with Gafchromic EBT2 films. Although a scintillation screen coupled with a CCD camera is used commonly for beam measurement in the accelerator technology field, the focus there is typically on improving geometrical resolution, reducing quenching effects or evaluating new scintillating materials (Schippers et al 2002, Gutlich et al 2012. In this work, we validate, instead, the newly-developed scintillation detector's ability to provide sensitive measurements of the tails of PBS spots-an area unexplored by previous researchers.…”

Section: Introductionmentioning

confidence: 99%

A novel technique for measuring the low-dose envelope of pencil-beam scanning spot profiles

Lin

Ainsley

Mertens³

et al. 2013

Phys. Med. Biol.

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To investigate the profile measurement capabilities of an IBA-Dosimetry scintillation detector and to assess its feasibility for determining the low-intensity tails of pencil-beam scanning spots, the responses of the scintillation detector and Gafchromic EBT2 film to a 115 MeV proton spot were measured in-air at the isocenter. Pairs of irradiations were made: one lower-level irradiation insufficient to cause saturation, and one higher-level irradiation which deliberately saturated the central region of the spot, but provided magnification of the tails. By employing the pair/magnification technique, agreement between the film and scintillation detector measurements of the spot profile can be extended from 4% of the central spot dose down to 0.01%. Gamma analysis between these measurements shows 95% and 99% agreement within a ±9 cm bound using criteria of 3 mm/3% and 5 mm/5%, respectively. Above 4%, our 115 MeV proton spot can be well-described by Gaussian function; below 4%, non-Gaussian, diamond-shaped tails predominate.

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Section: Introductionmentioning

confidence: 99%

A novel technique for measuring the low-dose envelope of pencil-beam scanning spot profiles

Lin

Ainsley

Mertens³

et al. 2013

Phys. Med. Biol.

View full text Add to dashboard Cite

show abstract

“…Radiation damage and change in optical properties were studied under various irradiation conditions for a large variety of scintillating materials [2][3][4][5]. The increasing radiation damage and destruction of active emission centers lead to a significant degradation of scintillation yield, which is one of the main problems using the screens as an appropriate tool for beam imaging [6].…”

Section: Introductionmentioning

confidence: 99%