# Analytical Formulas for Short Bunch Wakes in a Flat Dechirper

@article{Bane2016AnalyticalFF, title={Analytical Formulas for Short Bunch Wakes in a Flat Dechirper}, author={Karl L. F. Bane and Gennady Stupakov and Igor Zagorodnov}, journal={arXiv: Accelerator Physics}, year={2016} }

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…

## 30 Citations

### Joule Heating in a Flat Dechirper

- Physics
- 2017

We have performed Joule power loss calculations for a flat dechirper. We have considered the configurations of the beam on-axis between the two plates—for chirp control—and for the beam especially…

### Estimate of Joule Heating in a Flat Dechirper

- Physics
- 2017

We have performed Joule power loss calculations for a flat dechirper. We have considered the configurations of the beam on-axis between the two plates---for chirp control---and for the beam…

### Analytical treatment of the wakefields driven by transversely shaped beams in a planar slow-wave structure

- PhysicsPhysical Review Accelerators and Beams
- 2018

The suppression of transverse wakefield effects using transversely elliptical drive beams in a planar structure is studied with a simple analytical model that unveils the geometric nature of this…

### Wake measurements of a dechirper jaw with nonzero tilt angle

- PhysicsPhysical Review Accelerators and Beams
- 2018

The RadiaBeam/SLAC dechirper at the Linac Coherent Light Source (LCLS) is being used as a fast kicker, by inducing transverse wakefields, to e.g. facilitate Fresh-slice, two-color laser operation.…

### Beam performance of the SHINE dechirper

- Physics
- 2021

A corrugated structure is built and tested on many FEL facilities, providing a ‘dechirper’ mechanism for eliminating energy spread upstream of the undulator section of X-ray FELs. The wakefield…

### Tracking with wakefields in dielectric laser acceleration grating structures

- PhysicsPhysical Review Accelerators and Beams
- 2020

Due to the tiny apertures of dielectric laser acceleration grating structures within the range of the optical wavelength, wakefields limit the bunch charge for relativistic electrons to a few…

### Commissioning of the RadiaBeam / SLAC Dechirper

- Physics
- 2016

We present results on the commissioning of the twomodule RadiaBeam / SLAC dechirper system at LCLS. This is the first installation and measurement of a corrugated dechirper at high energy (4.4 13.3…

### Tapered helical undulator system for high efficiency energy extraction from a high brightness electron beam

- PhysicsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 2022

### Corrugated structure insertion for extending the SASE bandwidth up to 3% at the European XFEL

- Physics
- 2016

### Nonlinear energy chirp compensation with corrugated structures

- PhysicsNuclear Science and Techniques
- 2018

Herein, a feasible method is proposed to compensate the high-order effect during bunch length compression, thereby enhancing the peak current of a high-repetition-rate X-ray free-electron laser…

## References

SHOWING 1-10 OF 31 REFERENCES

### Calculation of wakefields in 2D rectangular structures

- Physics
- 2015

We consider the calculation of electromagnetic fields generated by an electron bunch passing through a vacuum chamber structure that, in general, consists of an entry pipe, followed by some kind of…

### The longitudinal high-frequency impedance of a periodic accelerating structure

- PhysicsProceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
- 1999

In many future collider and FEL designs intense, short bunches are accelerated in a linear accelerator. For example, in parts of the Linac Coherent Light Source (LCLS) a bunch with a peak current of…

### Wakefield potentials of corrugated structures

- Physics
- 2015

A corrugated structure, which is used in “dechirper” devices, is usually a pipe or two plates with small corrugations (bumps) on the walls. There is a good single-mode description of the wake…

### Longitudinal impedance of a periodic structure at high frequency.

- PhysicsPhysical review. D, Particles and fields
- 1989

An earlier derivation of the integral equation for the axial electric field at the beam-pipe radius is extended to the case of a periodic structure and it is shown that the reciprocal of the impedance per cell has a particularly simple form, closely related to the admittance for a single cavity.

### WAKEFIELD COMPUTATIONS FOR A CORRUGATED PIPE AS A BEAM DECHIRPER FOR FEL APPLICATIONS

- Physics
- 2015

A beam “dechirper” based on a corrugated, metallic vacuum chamber has been proposed recently to cancel residual energy chirp in a beam before it enters the undulator in a linac-based X-ray FEL.…

### Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source

- Physics
- 2015

In this study, electron beam energy chirp is an important parameter that affects the bandwidth and performance of a linac-based, free-electron laser. In this paper we study the wakefields generated…

### Commissioning of the RadiaBeam / SLAC Dechirper

- Physics
- 2016

We present results on the commissioning of the twomodule RadiaBeam / SLAC dechirper system at LCLS. This is the first installation and measurement of a corrugated dechirper at high energy (4.4 13.3…

### Using surface impedance for calculating wakefields in flat geometry

- Mathematics
- 2015

Beginning with Maxwell's equations and assuming only that the wall interaction can be approximated by a surface impedance, we derive formulas for the generalized longitudinal and transverse impedance…