OCTOPOD: single-bunch tomography for angular-spectral characterization of laser-driven protons

IF 5.2 1区 物理与天体物理 Q1 OPTICS High Power Laser Science and Engineering Pub Date : 2023-07-04 DOI:10.1017/hpl.2023.55
M. Reimold, S. Assenbaum, E. Beyreuther, E. Bodenstein, F. Brack, C. Eisenmann, F. Englbrecht, F. Kroll, F. Lindner, U. Masood, J. Pawelke, U. Schramm, M. Schneider, M. Sobiella, M. Umlandt, M. Vescovi, K. Zeil, T. Ziegler, J. Metzkes-Ng
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Abstract

Abstract Laser–plasma accelerated (LPA) proton bunches are now applied for research fields ranging from ultra-high-dose-rate radiobiology to material science. Yet, the capabilities to characterize the spectrally and angularly broad LPA bunches lag behind the rapidly evolving applications. The OCTOPOD translates the angularly resolved spectral characterization of LPA proton bunches into the spatially resolved detection of the volumetric dose distribution deposited in a liquid scintillator. Up to 24 multi-pinhole arrays record projections of the scintillation light distribution and allow for tomographic reconstruction of the volumetric dose deposition pattern, from which proton spectra may be retrieved. Applying the OCTOPOD at a cyclotron, we show the reliable retrieval of various spatial dose deposition patterns and detector sensitivity over a broad dose range. Moreover, the OCTOPOD was installed at an LPA proton source, providing real-time data on proton acceleration performance and attesting the system optimal performance in the harsh laser–plasma environment.
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用于激光驱动质子角光谱表征的单束层析成像
摘要激光等离子体加速质子束已广泛应用于从超高剂量率放射生物学到材料科学等研究领域。然而,表征光谱和角度宽LPA束的能力落后于快速发展的应用。OCTOPOD将LPA质子束的角度分辨光谱特征转化为液体闪烁体中沉积的体积剂量分布的空间分辨探测。多达24个多针孔阵列记录闪烁光分布的投影,并允许体积剂量沉积模式的层析重建,从中可以检索质子光谱。在回旋加速器上应用OCTOPOD,我们展示了各种空间剂量沉积模式的可靠检索和探测器在宽剂量范围内的灵敏度。此外,OCTOPOD安装在LPA质子源上,提供了质子加速性能的实时数据,并证明了系统在恶劣的激光等离子体环境下的最佳性能。
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来源期刊
High Power Laser Science and Engineering
High Power Laser Science and Engineering Physics and Astronomy-Nuclear and High Energy Physics
CiteScore
7.10
自引率
4.20%
发文量
401
审稿时长
21 weeks
期刊介绍: High Power Laser Science and Engineering (HPLaser) is an international, peer-reviewed open access journal which focuses on all aspects of high power laser science and engineering. HPLaser publishes research that seeks to uncover the underlying science and engineering in the fields of high energy density physics, high power lasers, advanced laser technology and applications and laser components. Topics covered include laser-plasma interaction, ultra-intense ultra-short pulse laser interaction with matter, attosecond physics, laser design, modelling and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid state lasers and excimer lasers.
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