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Initial observations of high-charge, low-emittance electron beams at HIBAF (High Brightness Accelerator FEL)
A. H. Lumpkin,R.B. Feldman,B.E. Carsten,D. W. Feldman,Richard L. Sheffield,W. E. Stein,W.J. Johnson,Lester E. Thode,S. C. Bender,G.E. Busch +9 more
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In this paper, the authors report the initial measurements of bright (high charge, low-emittance) electron beams generated at the Los Alamos High Brightness Accelerator FEL (HIBAF) Facility.Abstract:
We report our initial measurements of bright (high-charge, low-emittance) electron beams generated at the Los Alamos High Brightness Accelerator FEL (HIBAF) Facility. Normalized emittance values of less than 50 {pi} mm-mrad for charges ranging from 0.7 to 8.7 nC were obtained for single micropulses at a y-waist and at an energy of 14.7 MeV. These measurements were part of the commissioning campaign on the HIBAF photoelectric injector. Macropulse measurements have also been performed and are compared with PARMELA simulations. 5 refs., 8 figs., 3 tabs.read more
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Overview of high-brightness, high-average-current photoinjectors for FELs
TL;DR: In this article, an overview of photoinjector development with particular emphasis on high-average-current devices in FEL applications is presented, with a focus on the high-energy photoinjection.
Journal ArticleDOI
The Los Alamos FEL photoinjector drive laser
TL;DR: The drive laser system of the photoelectric injector for the Los Alamos free-electron laser (FEL) is described in this article, which consists of a 1.053 mu m mode-locked Nd:YLF oscillator, a grating-rhomb pulse compressor, a fast electrooptic shutter to reduce pulse repetition frequency, a pulsed Nd-YLF amplifier chain, and a KTP frequency doubler.
Journal ArticleDOI
Calculation of two-screen emittance measurement
Lingyi Zhang,Jiejia Zhuang +1 more
TL;DR: In this paper, a two-screen emittance measurement formula was proposed which corresponds directly to the condition "beam spot minimizing", which is a necessary condition for the beam waist to appear as a beam waist.
Study and Experimental Characterization of a Novel Photo Injector for the CLIC Drive Beam
TL;DR: In this article, the transverse and longitudinal beam properties of the PHIN photoinjector are characterized and the results of this paper are the important steps towards the feasibility demonstration of a photoin injector as the Compact Linear Collider's drive beam source.
Proceedings ArticleDOI
RF-synchronized imaging for particle and photon beam characterizations
TL;DR: In this paper, phase stability phenomena on photoelectric injectors, micropulse bunch length during a macropulse, microropulse elongation effects, transverse Wakefield effects within a micro-pulse, and submicropulse phenomena on a stored beam are presented.
References
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Interference phenomenon in optical transition radiation and its application to particle beam diagnostics and multiple‐scattering measurements
TL;DR: In this article, the optical transition radiation emitted by electron-irradiated aluminum, silver, gold-coated plates, and self-supported aluminum and Mylar films has been investigated experimentally.
Journal ArticleDOI
Transition radiation diagnostics for intense charged particle beams
TL;DR: In this paper, an overview of recent experiments conducted in order to develop precision beam diagnostics based on optical transition radation (OTR) is given, where time-integrated values of beam energy and emittance for rf linac beams with energies of 10−30 MeV have been measured by expoiting the dependence of the angular distribution of OTR on beam energy.
Journal ArticleDOI
Initial optical-transition radiation measurements of the electron beam for the Boeing free-electron-laser experiment
TL;DR: In this article, the potential for characterization of electron beams at ∼ 100 MeV at the Boeing Free Electron Laser (FEL) facility by optical-transition radiation (OTR) techniques has been demonstrated as an important complement to other diagnostic means.
Journal ArticleDOI
Optical-transition radiation measurements for the Los Alamos and boeing free-electron laser experiments
Alex H. Lumpkin,R.B. Feldman,Donald W. Feldman,S.A. Apgar,Bruce E. Carlsten,R.B. Fiorito,D.W. Rule +6 more
TL;DR: In this paper, beam profiles and beam divergence patterns from a single macropulse were recorded simultaneously using two intensified charge-injection device (CID) television cameras and an optical beam splitter.
Integrated Numerical Experiments (INEX) and the Free-Electron Laser Physical Process Code (FELPPC)
TL;DR: In this paper, the concept of an Integrated Numerical Experiment (INEX) was proposed to address the strong coupling character of the free electron laser (FEL) subsystems, such as the accelerator, wiggler, and optics, which greatly complicates the understanding and design of a FEL.