Study of drive laser shaping system for C-band photocathode RF gun

Fig. 4. Evolution of beam emittance and the beam distribution in the y-z plane at 1.1 m in three longitudinal beam distributions for 10 pC bunch charge

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Fig. 5. Evolution of beam emittance and the beam distribution in the y-z plane at 1.1 m in three longitudinal beam distributions for 100 pC bunch charge

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Table 1. Parameters required for drive laser system
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Table 1. Parameters required for drive laser system
wavelength/nm pulse energy in cathode/µJ RMS radius/mm FWHM/ps longitudinal distribution
266 ≥150 ≤0.15 ≤5 flat-top

Table 2. Parameters of drive laser
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Table 2. Parameters of drive laser
element wavelength/nm pulse RMS width/fs repetition rate/Hz pulse energy/mJ
oscillator 800 100 79.33×10⁶ 15×10⁻⁶
amplifier 800 − 1～100 13
third harmonic generator 266 160 1～100 2

Table 3. Parameters of α-BBO
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Table 3. Parameters of α-BBO
No. wavelength/nm L/mm time delay/ps
1 266 0.71 0.6
2 266 1.42 1.2
3 266 2.84 2.4

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Shimin Jiang, Zhijun Lu, Xingguang Liu, Xiao Li. Study of drive laser shaping system for C-band photocathode RF gun[J]. High Power Laser and Particle Beams, 2024, 36(10): 104003

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