INEX modeling of the Boeing ring optical resonator free electron laser

doi:10.1016/0168-9002(91)90940-R

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume 304, Issues 1–3, 1 July 1991, Pages 622-625

https://doi.org/10.1016/0168-9002(91)90940-R Get rights and content

Abstract

We present new results from the integrated numerical model of the accelerator/beam transport system and ring optical resonator of the Boeing free electron laser experiment. Modifications of the electron-beam transport have been included in a previously developed PARMELA model and are shown to reduce dramatically emittance growth in the 180° bend. The new numerically generated electron beam is used in the 3D FEL simulation code FELEX to calculate expected laser characteristics with the ring optical resonator and the 5 m untapered THUNDER wiggler. Performance sensitivity to optical cavity misalignments is studied.

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Cited by (3)

End-to-end simulation of a visible 1 kW FEL
2000, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
In this paper we present the complete numerical simulation of the 1 kW visible Free Electron Laser under construction in Seattle. We show that the goal of producing 1.0 kW at 0.7 μm is well within the hardware capabilities. We simulate in detail the evolution of the electron bunch phase space in the entire e-beam line. The e-beam line includes the photo-injector cavities, the 433.33 MHz accelerator, the magnetic buncher, the 1300 MHz accelerator, the 180° bend and the matching optics into the wiggler. The computed phase space is input for a three-dimensional time-dependent code that predicts the FEL performance. All the computations are based on state of the art software, and the limitations of the current software are discussed. We believe that this is the first time that such a thorough numerical simulation has been carried out and that such a realistic electron phase space has been used in FEL performance calculations.
Improving electron beam quality of the Boeing free electron laser
1991, Nuclear Inst. and Methods in Physics Research, A
The successful operation of any free electron laser (FEL) is critically dependent upon electron beam quality. In a radiofrequency (rf) accelerator the micropulse or instantaneous beam emittance and peak current is established by the injector, however, it is important to maintain this beam's quality as it is accelerated and transported to the wiggler. In the past year, work has continued to enhance the electron beam of the Boeing FEL. The previous year's improvements in levelling the gun charge during the macropulse and rf power flatness were reported in the 1989 FEL conference. More recent work has concentrated upon the rf master oscillator and electron beam transport, which have lead to reduced macropulse energy spread, as well as decreased position and angle jitter. Also some electron beam diagnostics have been upgraded. The result has been lower macropulse emittance at the entrance to the wiggler.
First operation of a free electron laser using a ring resonator
1991, Nuclear Inst. and Methods in Physics Research, A
During the past year the Boeing free electron laser optical cavity was changed from a simple concentric cavity using two spherical mirrors to a much larger ring resonator. The new resonator is made up of two-mirror telescopes located at each end of the wiggler with a round-trip path length of approximately 133 m. Each telescope consists of a grazing-incidence hyperboloid and a paraboloid. First lasing operation at 0.63 μm occurred on March 23 and 24, 1990. The lasing output was approximately seven orders of magnitude above the outcoupled spontaneous emission. The characteristics of the ring resonator are discussed. Lasing data is analyzed for the electron beam and ring resonator effects. Optical alignment techniques for the ring resonator are presented.

^☆: Work performed under the auspices of the U.S. Department of Energy and supported by the U.S. Army Ballistic Missile Defense Organization.

¹: Boeing Aerospace and Electronics, Seattle, Washington, USA.

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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

INEX modeling of the Boeing ring optical resonator free electron laser☆

Abstract

Nucl. Instr. and Meth.

End-to-end simulation of a visible 1 kW FEL

Improving electron beam quality of the Boeing free electron laser

First operation of a free electron laser using a ring resonator