Structure wakefield and dielectric laser accelerators

3 problems

• Damage mechanism of dielectrics under picosecond wakefields

  Open

  Dielectric tubes driven by very short electron bunches survive fields far above what copper tolerates, then fail at a threshold whose cause is unclear.

• Can dielectric laser accelerators reach staged MeV gain with useful charge

  Open

  Laser-driven glass chips have accelerated electrons, giving up to about half an MeV in a single structure; whether many structures can be chained for MeV-scale gain while keeping the beam focused and carrying useful charge is unknown.

• Maximum efficiency of a stable collinear structure wakefield accelerator

  Open

  A driving bunch hands energy to a trailing bunch through the wake it leaves; taking more energy also makes the trailing bunch wobble sideways and break up.