A5037783044- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Advanced X-ray Imaging Techniques
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Photocathodes and Microchannel Plates
- Magnetic confinement fusion research
- Muon and positron interactions and applications
- Laser Design and Applications
- Laser-Plasma Interactions and Diagnostics
- Pulsed Power Technology Applications
- Radiation Detection and Scintillator Technologies
- Crystallography and Radiation Phenomena
- Boron Compounds in Chemistry
- Particle physics theoretical and experimental studies
- Fusion materials and technologies
- Quantum Chromodynamics and Particle Interactions
- Heat Transfer and Boiling Studies
- Advanced Electron Microscopy Techniques and Applications
- Spacecraft and Cryogenic Technologies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Atomic and Molecular Physics
Whitworth University
2022
University of Vermont
2021
Lawrence Berkeley National Laboratory
2006-2019
Rice University
1982-2004
University of California, Berkeley
1990-2003
The Ohio State University
1983-2001
Fusion (United States)
1997
University of Michigan
1983
University of Wisconsin–Madison
1983
University of California, San Diego
1983
The Advanced Photoinjector Experiment (APEX) at the Lawrence Berkeley National Laboratory is dedicated to development of a high-brightness high-repetition rate (MHz-class) electron injector for x-ray free-electron laser (FEL) and other applications where high repetition rates brightness are simultaneously required. based on new concept rf gun utilizing normal-conducting (NC) cavity resonating in VHF band 186 MHz, operating continuous wave (cw) mode conjunction with quantum efficiency...
A high repetition rate, MHz-class, high-brightness electron source is a key element in future high-repetition-rate x-ray free laser-based light sources. The VHF-gun, novel low frequency radio-frequency gun, the Lawrence Berkeley National Laboratory (LBNL) response to that need. gun design based on normal conducting, single cell cavity resonating at 186 MHz VHF band and capable of continuous wave operation while still delivering accelerating fields cathode required for brightness performance....
We present an updated design for a proposed source of ultra-fast synchrotron radiation pulses based on recirculating superconducting linac, in particular the incorporation EUV and soft x-ray production. The project has been named LUX - Linac-based Ultrafast X-ray facility. produces intense with duration 10-100 fs at 10 kHz repetition rate, synchronization 10's fs, optimized study dynamics. photon range covers to hard spectrum by use seeded harmonic generation undulators, specialized...
Abstract Several recent reports have identified the scientific requirements for a future soft X-ray light source [Citation1, Citation2, Citation3, Citation4, Citation5], and high-repetition-rate free-electron laser (FEL) facility responsive to them is being studied at Lawrence Berkeley National Laboratory (LBNL) [Citation6]. The based on continuous-wave (CW) superconducting linear accelerator with beam supplied by high-brightness, photocathode electron gun operating in CW mode, an array of...
The past decade was characterized by an increasing scientific demand for extending towards higher repetition rates (MHz class and beyond) the performance of already operating lower rate accelerator-based instruments such as x-ray free electron lasers (FELs) ultrafast diffraction (UED) microscopy (UEM) instruments. Such a need stimulated worldwide spread vibrant R activity targeting development high-brightness sources capable at these challenging rates. Among different technologies pursued,...
STATUS OF THE APEX PROJECT AT LBNL* F. Sannibale, B. Bailey, K. Baptiste, J. Byrd, C. Cork, Corlett, S. De Santis, Dimaggio, L. Doolittle, Doyle, P. Emma, Feng, D. Filippetto, Garcia Quintas, G. Huang, H. T. Kramasz, Kwiatkoswski, W.E. Norum, Padmore, C.F. Papadopoulos, Pappas, Portmann, Qiang, Staples, Vecchione, M. Venturini, Vinco, W. Wan, R. Wells, Zolotorev, Zucca, LBNL, Berkeley, CA, USA Prantil, Messerly, LLNL, Livermore, Pogue, Naval Postgraduate School, Monterey, Abstract The...
Based on recent experimental results made the large and small multicusp volume H− sources, a new source has been designed to generate high-brightness or D− beams for high duty factor dc operations. Cesium will be introduced into plasma enhance output current. Arrangements reducing electrons as well capturing them in preaccelerator electrodes incorporated geometry.
ABSTRACT Calcium ions (Ca2+) entering cilia through the ciliary voltage-gated calcium channels (CaV) during action potential causes reversal of power stroke and backward swimming in Paramecium tetraurelia. How is returned to resting level not yet clear. Our focus on pumps as a possible mechanism. There are 23 P. tetraurelia genes for that members family plasma membrane Ca2+ ATPases (PMCAs). They have domains homologous those found mammalian PMCAs. Of 13 pump proteins previously identified...
Experimental mobile radios using pilot carrier single-sideband modulation have been constructed and subjected to field tests. The is used both for a.g.c, demodulation. tests involved side-by-side comparisons with conventional FM equipment in urban surroundings at VHF UHF. SSB was found be no more sensitive ignition noise than less affected by fading. It proposed that suitable land radio, it efficient spectrum usage power.
New generation accelerator-based X-ray light sources require high quality beams with average brightness. Normal conducting L- and S-band photo injectors are limited in repetition rate D-C (photo)injectors field strength at the cathode. We propose a low frequency normal-conducting cavity, operating 50 to 100 MHz CW, provide beam bunches of up cavity frequency. The photoinjector uses re-entrant structure, requiring less than kW peak wall power density 10 W/cm <sup...
Neutral beams for the next generation tokamaks will be based on multiampere negative ion with a beam energy of about 1.0 MeV and pulse lengths thousand seconds. High intensity dc at these levels require extensive development in electrostatic accelerators. At Lawrence Berkeley Laboratory, two-module quadrupole (ESQ) accelerator was built to accelerate ions 200 keV. In this experiment, up 100 mA H− current obtained from Japan Atomic Energy Research Institute cesiated volume source using...