A. van Steenbergen

A microwiggler free-electron laser at the Brookhaven accelerator test facility

Abstract We report the design and status of an FEL experiment at the Brookhaven National Laboratory Accelerator Test Facility. A 50 MeV high-brightness electron beam will be utilized for an oscillator experiment in the visible-wavelength region. The microwiggler to be used is a superferric planar undulator with a 0.88 cm period, 60 cm length and K = 0.35. The optical cavity is a 368 cm long stable resonator with broadband dielectric coated mirrors.

The National Synchrotron Light Source basic design and project status

Abstract A summary description and the basic design parameters of the National Synchrotron Light Source, a facility for the generation of intense synchrotron radiation in the VUV and X-ray range is presented, the parameters of the sources are given, the presently planned facility beam lines are tabulated and the status of the project is indicated.

The CMS, A Cold Magnet Synchrotron to Upgrade the Proton Energy Range of the BNL Facility

The results of a design study of a nominally 100 GeV (or 150 GeV) proton synchrotron, making use of very pure aluminum conductor magnets, operating at 12°K, or superconducting magnets, operating at 4.5°K, are presented.

National Synchrotron Light Source VUV Storage Ring

A 700 MeV electron storage ring designed for synchrotron radiation applications is described. Lattice and stability calculations are presented and the vacuum, correction and injection systems are discussed.

Free Electron Laser Experiment at the NSLS 700 MeV Electron Storage Ring

A free electron laser experiment is described, to be performed with the 700 MeV electron storage ring of the National Synchrotron Light Source. The experiment is designed to study the parameters of the fel in an electron storage ring and the performance of this laser as a source of short wavelength radiation in the VUV region of the spectrum. The initial experiment will be carried out at a wave length of approximately 3000 Å, utilizing a permanent magnet undulator. For an average electron current of 1A distributed in three beam bunches, the small signal gain per pass (relative enhancement of the radiation intensity per electron bunch pass through the undulator) is calculated to be approximately 10%.

WIGGLER, UNDULATOR, AND FREE ELECTRON LASER RADIATION SOURCES DEVELOPMENT AT THE NATIONAL SYNCHROTRON LIGHT SOURCE

Abstract An overview is presented of the special radiation sources development at the NSLS for incorporation in a 2.5 GeV X-ray storage ring and a 700 MeV VUV storage ring. This includes a superconducting high field multipole wiggler, λ c = 0.5 A ; a permanent magnet wiggler, λ c = 2.0 A ; a maximum photon energy undulator (5–7 keV); an undulator for a soft X-ray line or “continuum” spectrum and a free electron laser source tunable in the 2500–4500 A region. Source characteristics and status of development are given. In addition, the incorporation of a backscattered Compton photon source is being studied and relevant parameters are presented.

A new method for pumping an optical klystron

A novel method of operation for a transverse optical klystron (TOK) is proposed. The TOK is a device in which a relativistic electron beam produces tunable coherent radiation at short wavelengths by interacting with a powerful external laser and an undulator field. Here we show that, by selecting the external laser wavelength to be one of the harmonics in the undulator radiation spectrum, excellent output at short wavelengths can be realized with significantly reduced performance requirements for the undulator magnet and the storage ring providing the electron beam.

The NSLS Booster Synchrotron

The Booster for the National Synchrotron Light Source electron storage rings is a 100-700 MeV synchrotron with 28.35 meter circumference. Its design current is 20 mA and its repetition rate is 1 Hertz. The lattice consists of four superperiods, each containing two focusing quadrupole magnets and two defocusing bending magnets. Nominal tunes are Vx=2.42, vy=1.37. Small values of ßx and ¿x in the bending magnets allow a damped emittance ¿x= 5.6xl0-8 meter radians. Details of the lattice, beam dynamics and beam injection and ejection are presented.

Synchrotron Radiation Sources

As a result of the exponential growth of the utilization of synchrotron radiation for research in the domain of the material sciences, atomic and molecular physics, biology and technology, a major construction activity has been generated towards new dedicated electron storage rings, designed optimally for synchrotron radiation applications, also, expansion programs are underway at the existing facilities, such as DORIS, SPEAR, and VEPP. In this report the basic properties of synchrotron radiation will be discussed, a short overview will be given of the existing and new facilities, some aspects of the optimization of a structure for a synchrotron radiation source will be discussed and the addition of wigglers and undulators for spectrum enhancement will be described. Finally, some parameters of an optimized synchrotron radiation source will be given.

Status of the visible Free-Electron Laser at the Brookhaven Accelerator Test Facility

Abstract The 500 nm free-electron laser (FEL) at the accelerator test facility (ATF) of the Brookhaven National Laboratory is reviewed. We present an overview of the ATF, a high-brightness, 50-MeV, electron accelerator and laser complex which is a users facility for accelerator and beam physics. A number of laser acceleration and FEL experiments are under construction at the ATF. The visible FEL experiment is based on a novel superferric 8.8 mm period undulator. The electron beam parameters, the undulator, the optical resonator, optical and electron beam diagnostics are discussed. The operational status of the experiment is presented.