What question did this study set out to answer?

The aim is to report on the advancements of the 2 PW/1 Hz laser system designed for proton tumor therapy.

May 3, 20261 citations

The 2 PW/1 Hz laser system for laser-driven proton tumor therapy facility CLAPA-II: Compact laser plasma accelerator II.

MWMinjian WuPeking University HZHailong ZhangQingdao University YGYixing GengPeking University

Key Points

The aim is to report on the advancements of the 2 PW/1 Hz laser system designed for proton tumor therapy.
Evaluated maximum single-pulse laser energy and pulse width of the system.
Measured laser quality parameters and stability over multiple shots.
Conducted laser acceleration experiments using the system.
Achieved a maximum single-pulse laser energy of 71.9 J and pulse width of 29 fs.
Laser stability showed minimal angular pointing fluctuations of 1.04 μrad horizontally and 0.797 μrad vertically.
Ps contrast was better than 10^12, indicating high quality of the laser output.

Abstract

In this paper, we report the recent progress on the 2 PW/1 Hz laser system for laser-driven proton tumor therapy facility CLAPA-II Kedong et al., Phys. Rev. Accel. Beams 23, 111302 (2020), and the system is currently capable of outputting a maximum single-pulse laser energy of 71.9 J, a pulse width of 29 fs, and a peak power of 2.48 PW for high-power fs lasers. In terms of laser quality parameters, ps contrast is better than 1012, and ns contrast is 2 × 1010. In terms of laser stability, the horizontal and vertical angular pointing fluctuations over 500 shots were measured to be 1.04 and 0.797 μrad, respectively. The device has currently been deployed in laser acceleration experiments.

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