Analytical Formulas for Short Bunch Wakes in a Flat Dechirper

Abstract

We develop analytical models of the longitudinal and transverse wakes, on and off axis for realistic structures, and then compare them with numerical calculations, and generally find good agreement. These analytical "first order" formulas approximate the droop at the origin of the longitudinal wake and of the slope of the transverse wakes; they represent an improvement in accuracy over earlier, "zeroth order" formulas. In example calculations for the RadiaBeam/LCLS dechirper using typical parameters, we find a 16\% droop in the energy chirp at the bunch tail compared to simpler calculations. With the beam moved to 200~$\mu$m from one jaw in one dechiper section, one can achieve a 3~MV transverse kick differential over a 30~$\mu$m length.

28 pages, 13 figures

References in corpus (4)

• Demonstration of nonlinear-energy-spread compensation in relativistic electron bunches with corrugated structures
• Experimental demonstration of longitudinal beam phase space linearizer in a free-electron laser facility by corrugated structures
• Dechirper Wakefields for Short Bunches
• Time-resolved Measurement of Quadrupole Wakefields in Corrugated Structures

Cited by in corpus (10)

• Measurements of wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source
• Inhibition of Current-spike Formation Based on Longitudinal Phase Space Manipulation for High-Repetition-Rate X-ray FEL
• Tracking with wakefields in dielectric laser acceleration grating structures
• Bandwidth broadening of X-ray free electron laser pulses with the natural gradient of planar undulator
• Radiation of a charge moving along a corrugated surface with a relatively small period
• Generation of coherent two-color pulses at the two adjacent harmonics in a seeded free-electron laser
• Tapered helical undulator system for high efficiency energy extraction from a high brightness electron beam
• Longitudinal phase space diagnostics with a nonmovable corrugated passive wakefield streaker
• Estimate of Joule Heating in a Flat Dechirper
• Wake Measurements of a Dechirper Jaw with Non-Zero Tilt Angle