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

Technical Report · Wed Feb 15 00:00:00 EST 1989

DOI:https://doi.org/10.2172/6224592· OSTI ID:6224592

Briggs, R J

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.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6224592
• Report Number(s): UCID-21639; ON: DE89007691
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

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
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PARTICLE BEAMS
420300* - Engineering- Lasers- (-1989)
430100 - Particle Accelerators- Design
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