A5083447747- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Advanced X-ray Imaging Techniques
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Laser-Plasma Interactions and Diagnostics
- Advanced Surface Polishing Techniques
- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Photocathodes and Microchannel Plates
- Electron and X-Ray Spectroscopy Techniques
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Photonic and Optical Devices
- X-ray Spectroscopy and Fluorescence Analysis
- Spacecraft and Cryogenic Technologies
- Nuclear reactor physics and engineering
- International Science and Diplomacy
- Energy and Environment Impacts
- Laser Material Processing Techniques
- Solid State Laser Technologies
Thomas Jefferson National Accelerator Facility
1999-2024
Fermi National Accelerator Laboratory
1988-2022
SLAC National Accelerator Laboratory
1992-2020
University College London
2016
TRIUMF
2013-2014
Cornell University
1992-2007
Massachusetts Institute of Technology
2007
Oak Ridge National Laboratory
2007
Argonne National Laboratory
2007
Brookhaven National Laboratory
1992-2007
Jefferson Laboratory's kW-level infrared free-electron laser utilizes a superconducting accelerator that recovers about 75% of the electron-beam power. In achieving first lasing, operated "straight ahead" to deliver 38-MeV, 1.1-mA cw current for lasing near 5 &mgr;m. The waste beam was sent directly dump while producing stable operation at up 311 W. Utilizing recirculation loop send electron back linac energy recovery, machine has now recovered average currents mA, and lased with 1720 W output 3.1
Practically all synchrotron x-ray sources to data are based on the use of storage rings produce high current electron (or positron) beams needed for radiation (SR). The ultimate limitations quality beam, which directly reflected in many most important characteristics SR beams, arise from physics equilibrium processes fundamental operation rings. It is possible with superior via photoinjected and high-energy linacs; however, energy consumption such machines prohibitive. This limitation can be...
The nonlinear dynamics of transverse particle oscillations in the Fermilab Tevatron is studied experimentally and compared with prediction. Accurate measurements various phase-space features are obtained. A theoretically expected metastable state accelerator, particles captured on resonance islands, demonstrated experimentally, stability investigated.
This review paper describes the energy-upgraded Continuous Electron Beam Accelerator Facility (CEBAF) accelerator. superconducting linac has achieved 12 GeV beam energy by adding 11 new high-performance cryomodules containing 88 cavities that have operated cw at an average accelerating gradient of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>20</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>MV</a:mi><a:mo>/</a:mo><a:mi...
Free-electron-laser (FEL) oscillators have only recently achieved their original promise as producers of high-power, short-wavelength, tunable radiation. Room-temperature accelerator systems generally had limited duty factor due to excessive Ohmic losses on cavity walls. The application superconducting radio-frequency (SRF) technology has now permitted an increase by more than two orders magnitude in FEL average power just increased continuous-wave operation. A concurrent technical...
▪ Abstract The use of energy recovery provides a potentially powerful new paradigm for generation the charged particle beams used in synchrotron radiation sources, high-energy electron cooling devices, electron-ion colliders, and other applications photon science nuclear physics. Energy-recovering linear accelerators (called energy-recovering linacs, or ERLs) share many characteristics with ordinary as their six-dimensional beam phase space is largely determined by source properties....
The dynamics of a metastable beam particles ``injected'' into artificially excited resonance islands in the Fermilab Tevatron is studied. Evolution captured distribution measured by an externally detectable coherent signal. Dynamical partitions observed control space amplitude and tune focusing modulation are consistent with equivalent mode ensemble driven gravity pendula. model's single parameter, island ${\mathit{Q}}_{\mathit{I}}$ small oscillations, inferred as central frequency resonant...
The multipass, multibunch beam breakup (BBU) instability imposes a potentially severe limitation to the average current that can be accelerated in an energy-recovery linac. Simulation results for Jefferson Lab's free electron laser (FEL) upgrade driver are presented which predict occurrence of BBU below nominal operating machine. In agreement with simulation, was observed and preliminary measurements identify higher-order mode causing shown. addition, performed experimentally determine...
Synchrotron light sources based on Energy Recovery Linacs (ERLs) show promise to deliver X-ray beams with both brilliance and pulse duration far superior the values that can be achieved storage ring technology. Cornell University, in collaboration Jefferson Laboratory, has proposed construction of a prototype ERL. This 100MeV, 100mA CW superconducting electron accelerator will used study resolve many physics technology issues this type machine. These studies are essential before ERLs...
In recirculating accelerators, and, in particular, energy-recovery linacs, the maximum current can be limited by multipass, multibunch beam breakup (BBU), which occurs when electron interacts with higher-order modes (HOMs) of an accelerating cavity on pass and again energy recovering pass. This effect is particular concern design modern high average accelerators utilizing superconducting rf technology. Experimental characterization observations instability at Jefferson Laboratory 10 kW free...
The AWAKE project at CERN is planned to study proton driven plasma wakefield acceleration. beam from the SPS will be used in order drive wakefields a 10 m long Rubidium cell. In first phase of this experiment, scheduled 2016, self-modulation studied detail, while second an external electron injected into probe acceleration process. installation former CNGS experimental area and required optics flexibility define tight boundary conditions fulfilled by line design. transport low energy (10-20...
ARIEL is the new TRIUMF facility for production of radioactive ion beams that will enable delivery three simultaneous RIB to ISAC experimental stations. Two additional target stations produce by using either a 50 kW proton or from 500 electrons via photofission. The electron beam driver going be MeV 10 mA CW superconducting linac. first stage e-linac installation completed and commissioning underway. paper present design characteristics, installation, strategy current results.