Zakaryan Samvel

• Problem definition

• Structure description

• Micro-bunching of uniform and parabolic bunches

• Gaussian bunch compression

• Summary

Study of micro-bunching and compression of a bunch after passing through a single-mode waveguide.

Geometry of one-mode structure

2 2d

a q𝑑

Drift space d𝑟

𝒂 = 𝟎. 𝟓𝒎𝒎,𝒅 = 𝟏𝝁𝒎,𝝈 = 𝟏𝟎𝟒𝑺

𝒎

E=10MeV E=40MeV

Structure and bunch parameters

𝐸 = 10𝑀𝑒𝑉

𝑞 = 100𝑝𝐶

𝑎 = 0.5𝑚𝑚

𝑑 = 1𝜇𝑚

𝜎 = 104𝑆

𝑚

𝐿 = 0.5𝑚

𝑎𝑏𝑢𝑛𝑐ℎ = 300𝜇𝑚

𝒅𝒓 = 𝟏𝒎 𝒅𝒓 = 𝟐𝒎

𝒅𝒓 = 𝟑𝒎 𝒅𝒓 = 𝟓𝒎

Structure and bunch parameters

𝐸 = 10𝑀𝑒𝑉

𝑞 = 100𝑝𝐶

𝑎 = 0.5𝑚𝑚

𝑑 = 1𝜇𝑚

𝜎 = 104𝑆

𝑚

𝐿 = 0.5𝑚

𝑎𝑏𝑢𝑛𝑐ℎ = 300𝜇𝑚

𝒅𝒓 = 𝟎. 𝟓𝒎, 𝝈 = 𝟐𝟏𝝁𝒎 𝒅𝒓 = 𝟏𝒎,𝝈 = 𝟖. 𝟑𝟔𝝁𝒎

Structure and bunch parameters

𝐸 = 10𝑀𝑒𝑉

𝑞 = 100𝑝𝐶

𝑎 = 0.5𝑚𝑚

𝑑 = 1𝜇𝑚

𝜎 = 104𝑆

𝑚

𝐿 = 1𝑚

rms = 100𝜇𝑚

𝒅𝒓 = 𝟏𝒎,𝝈 = 𝟒𝟔. 𝟐𝝁𝒎 𝒅𝒓 = 𝟏. 𝟓𝒎,𝝈 = 𝟑𝟖. 𝟏𝝁𝒎

𝒅𝒓 = 2𝒎, 𝝈 = 𝟑𝟐𝝁𝒎 𝒅𝒓 = 3𝒎, 𝝈 = 𝟏𝟖. 𝟕𝝁𝒎

• Bunch compression is shown for 300𝝁𝒎 Uniform bunch up to 8.36𝝁𝒎

• Bunch compression is shown for a 100𝝁𝒎 Gaussian bunch up to 18.7𝝁𝒎