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Title: Induction accelerators and free-electron lasers at LLNL: Beam Research Program

Abstract

Linear induction accelerators have been developed to produce pulses of charged particles at voltages exceeding the capabilities of single-stage, diode-type accelerators and at currents too high rf accelerators. In principle, one can accelerate charged particles to arbitrarily high voltages using a multistage induction machine. The advent of magnetic pulse power systems makes sustained operation at high repetition rates practical, and high-average-power capability is very likely to open up many new applications of induction machines. In Part A of this paper, we survey the US induction linac technology, emphasizing electron machines. We also give a simplified description of how induction machines couple energy to the electron beam to illustrate many general issues that designers of high-brightness and high-average-power induction linacs must consider. We give an example of the application of induction accelerator technology to the relativistic klystron, a power source for high-gradient accelerators. In Part B we address the application of LIAs to free-electron lasers. The multikiloampere peak currents available from linear induction accelerators make high-gain, free-electron laser amplifier configurations feasible. High extraction efficiencies in a single mass of the electron beam are possible if the wiggler parameters are appropriately ''tapered'', as recently demonstrated at millimeter wavelengths on the 4-MeV ELFmore » facility. Key issues involved in extending the technology to shorter wavelengths and higher average powers are described. Current FEL experiments at LLNL are discussed. 5 refs., 16 figs.« less

Authors:
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
6224592
Report Number(s):
UCID-21639
ON: DE89007691
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 43 PARTICLE ACCELERATORS; FREE ELECTRON LASERS; DESIGN; ELECTRON BEAMS; KLYSTRONS; LINEAR ACCELERATORS; USES; ACCELERATORS; BEAMS; ELECTRON TUBES; ELECTRONIC EQUIPMENT; EQUIPMENT; LASERS; LEPTON BEAMS; MICROWAVE EQUIPMENT; MICROWAVE TUBES; PARTICLE BEAMS; 420300* - Engineering- Lasers- (-1989); 430100 - Particle Accelerators- Design, Development, & Operation

Citation Formats

Briggs, R J. Induction accelerators and free-electron lasers at LLNL: Beam Research Program. United States: N. p., 1989. Web. doi:10.2172/6224592.
Briggs, R J. Induction accelerators and free-electron lasers at LLNL: Beam Research Program. United States. https://doi.org/10.2172/6224592
Briggs, R J. 1989. "Induction accelerators and free-electron lasers at LLNL: Beam Research Program". United States. https://doi.org/10.2172/6224592. https://www.osti.gov/servlets/purl/6224592.
@article{osti_6224592,
title = {Induction accelerators and free-electron lasers at LLNL: Beam Research Program},
author = {Briggs, R J},
abstractNote = {Linear induction accelerators have been developed to produce pulses of charged particles at voltages exceeding the capabilities of single-stage, diode-type accelerators and at currents too high rf accelerators. In principle, one can accelerate charged particles to arbitrarily high voltages using a multistage induction machine. The advent of magnetic pulse power systems makes sustained operation at high repetition rates practical, and high-average-power capability is very likely to open up many new applications of induction machines. In Part A of this paper, we survey the US induction linac technology, emphasizing electron machines. We also give a simplified description of how induction machines couple energy to the electron beam to illustrate many general issues that designers of high-brightness and high-average-power induction linacs must consider. We give an example of the application of induction accelerator technology to the relativistic klystron, a power source for high-gradient accelerators. In Part B we address the application of LIAs to free-electron lasers. The multikiloampere peak currents available from linear induction accelerators make high-gain, free-electron laser amplifier configurations feasible. High extraction efficiencies in a single mass of the electron beam are possible if the wiggler parameters are appropriately ''tapered'', as recently demonstrated at millimeter wavelengths on the 4-MeV ELF facility. Key issues involved in extending the technology to shorter wavelengths and higher average powers are described. Current FEL experiments at LLNL are discussed. 5 refs., 16 figs.},
doi = {10.2172/6224592},
url = {https://www.osti.gov/biblio/6224592}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 1989},
month = {Wed Feb 15 00:00:00 EST 1989}
}