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2026年10期
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Laser system of the very compact inverse Compton scattering γ-ray source at Tsinghua University
Laser system of the very compact inverse Compton scattering γ-ray source at Tsinghua University
摘要
With the development of high-brightness electron beams and chirped pulse amplification technology,inverse Compton scat-tering(ICS)X/γ-rays are characterized by compactness,quasi-monochromaticity,continuous energy tunability,and high photon energy.The application of ultrafast laser technology has improved the temporal resolution,brightness,and spectral control capabilities of X/γ-rays.In this study,we present the design and implementation of a laser system for the very com-pact inverse Compton scattering γ-ray source.The laser system consisted of a photoinjector driving laser system and a scat-tering laser system.The photoinjector driving laser system produced ultraviolet pulses with pulse energy,pulse width,and repetition rate of 0.58 mJ,7.2 ps(FWHM),and 10 Hz,respectively,at a central wavelength of 267 nm,which illuminated a photocathode to generate a high-quality electron beam.The ICS laser system produced two alternative ultrashort laser pulses with central wavelengths of 800 nm and 400 nm,which interacted with the electron beam.An intense second-harmonic(SH)laser with 0.5 J pulse energy was achieved experimentally by passing a terawatt Ti:sapphire laser pulse through a 0.59 mm potassium dihydrogen phosphate(KDP)crystal.A uniform SH laser focal intensity distribution was obtained via wavefront correction using a deformable mirror.
年，卷(期)：
2026, 37(10)
机标分类号：
TP391.5
TN252
U45
在线出版日期：
2026年10月16日
