Zobrazeno 1 - 10
of 16
pro vyhledávání: '"James W. Early"'
Autor:
T.J. Zaugg, Patrick G. O'Shea, Donald W. Feldman, James W. Early, D.A. Byrd, B.E. Newnam, Richard L. Sheffield, John C. Goldstein, Roger W. Warren, Steven C. Bender, C.M. Fortgang
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 341:7-11
We report on the design details of the first ultraviolet (UV) free-electron laser (FEL) oscillator driven by low-energy electrons from a radio-frequency linear accelerator. In our experiment we used a high-current, high brightness electron beam in co
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 341:142-145
Wavelength tunability, synchrotron sidebands, and picosecond pulse structure are inherent FEL characteristics that should be advantageous for photochemistry involving infrared multiple-photon photodissociation. Tuned to an absorption resonance, the F
Autor:
John C. Goldstein, Mark J. Schmitt, James W. Early, William E. Stein, Richard L. Sheffield, Steven C. Bender, T.J. Zaugg, Bruce E. Carlsten, Donald W. Feldman, B.E. Newnam, Mark D. Wilke, Roger W. Warren, C.M. Fortgang, Patrick G. O'Shea
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 331:48-51
The APEX FEL normally lases near a wavelength of 3 μm using a permanent magnet wiggler with a 2.7-cm period and a linear accelerator of 40-MeV energy. Los Alamos National Laboratory is conducting a series of experiments with the goal of lasing at si
Autor:
T.J. Zaugg, Bruce E. Carlsten, Alex H. Lumpkin, Eric J. Pitcher, Mark D. Wilke, R.B. Feldman, Steven C. Bender, John C. Goldstein, K.F. McKenna, Patrick G. O'Shea, R. L. Martineau, James W. Early, Donald W. Feldman, Mark J. Schmitt, William E. Stein
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 331:62-68
The APEX (APLE Prototype Experiment) FEL (free-electron laser) is an advanced technology test-bed for the Average Power Laser Experiment (APLE). APEX is a photoinjector-driven FEL that is currently operated as an oscillator with untapered wigglers. P
Autor:
Alex H. Lumpkin, James W. Early
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 318:389-395
We have performed the first dual-sweep streak camera measurements of a photoelectric injector (PEI) drive laser in regard to micropulse duration, phase jitter, and phase slew. As the drive laser features are directly coupled to the eventual electron-
Autor:
R.B. Feldman, Mark J. Schmitt, Donald W. Feldman, R.W. Springer, Steven C. Bender, T.J. Zaugg, Bruce E. Carlsten, W.J. Johnson, Alex H. Lumpkin, James W. Early, D.A. Byrd, Patrick G. O'Shea, William E. Stein
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 318:52-57
We report initial results on the APEX (APLE prototype experiment) photoinjector-driven infrared free-electron laser (FEL). The APEX FEL is operating in support of a Boeing Aerospace and Electronics/Los Alamos National Laboratory collaboration to buil
Autor:
Bruce E. Carlsten, Alex H. Lumpkin, R.B. Feldman, Steven C. Bender, Donald W. Feldman, James W. Early, Richard L. Sheffield, William E. Stein, W.J. Johnson, K.F. McKenna, Patrick G. O'Shea
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 304:224-227
The Los Alamos free electron laser (FEL) is being rebuilt with a photoelectric injector and 40 MeV beam energy for a lower emittance, brighter beam. Tests of the Los Alamos high-brightness accelerator FEL (HIBAF) system have been conducted including
Publikováno v:
Advanced Solid State Lasers.
A Cr:LiSAF laser has been successfully operated at time averaged powers up to 11 W and at pulse repetition rates to 12 Hz. During Q-switched operation, output energy as high as 450 mJ (32 ns FWHM) was obtained. Line-narrowed Q-switched pulses (
Publikováno v:
39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit.
This paper addresses the progress of technology development of a laser ignition system at NASA Marshall Space Flight Center (MSFC). Laser ignition has been used at MSFC in recent test series to successfully ignite RP1/GOX propellants in a subscale ro
Autor:
Richard L. Sheffield, L.M. Young, Donald W. Feldman, W.J. Johnson, William E. Stein, Patrick G. O'Shea, James W. Early, Bruce E. Carlsten, Alex H. Lumpkin, R.W. Springer, Steven C. Bender, R.B. Feldman
Publikováno v:
Conference Record of the 1991 IEEE Particle Accelerator Conference.
The Los Alamos free-electron laser (FEL) facility has been modified by the replacement of the thermionic electron gun and bunchers with a 1300-MHz RF photoinjector. Two more accelerator tanks have been added to increase the beam energy to 40 MeV. Pre