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angular chirp 1focal spot quality 1laser-driven proton acceleration 1petawatt laser 1spatiotemporal coupling 1

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physics.plasm-ph2026

Impact of Residual Angular Chirp in a Petawatt-class Laser System on Laser-driven Proton Acceleration

Qingfan Wu, Minjian Wu, Jiarui Zhao +25

The paper shows that a small residual angular chirp caused by misaligned grating compressors in a petawatt laser degrades the focal spot and reduces proton energies, and that remov…