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Optimizing Particle Bunch Compression in Gaussian Stacking Scenario

This study explores optimizing particle bunch compression using stacked Gaussians. Four Gaussians with σ=2.3 ps and 1.4 ps separation result in FWHM of 13.0 ps, RMS of 4.3 ps, and spot size of 1.2 mm RMS. The scenario achieves 3.5E-6 emittance, ±3.2% dp/p (FW), and RMS bunch length of 320 µm post-compression without a 3rd harmonic cavity. Additionally, four Gaussians with σ=2.3 ps and 2.3 ps separation achieve FWHM of 20.8 ps and RMS of 6.4 ps. The use of an Irised Gaussian with σ=2.85 mm and iris of 4.8 mm diameter reduces intensity by 30% while resulting in a phase space density variation of ±17.5%.

allegra-hatfield
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Optimizing Particle Bunch Compression in Gaussian Stacking Scenario

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  1. Summary

  2. Stacked Gaussians • 4 gaussians @ σ=2.3 ps; separation =1.4 ps • FWHM=13.0 ps; RMS=4.3 ps with spot size = 1.2mm RMS (flat distribution, 4.8mm dia.) and 3.2 nC/pulse yields 3.5E-6 emittance, dp/p (FW) = ±3.2%, and RMS bunch length = 320 µm after bunch compression (no 3rd harmonic cavity) 4 gaussians @ σ=2.3 ps; separation=2.3 ps  FWHM=20.8 ps; RMS=6.4 ps

  3. Irised Gaussian σ = 2.85mm; iris = 4.8mm dia  intensity reduced to 30%; phase space density variation of ±17.5%

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