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First lasing of the IR upgrade FEL at Jefferson lab

Journal Article · · Nuclear Instruments and Methods in Physics Research Section A
OSTI ID:836642
We report initial lasing results from the IR Upgrade FEL at Jefferson Lab[1]. The electron accelerator was operated with low average current beam at 80 MeV. The time structure of the beam was 120 pC bunches at 4.678 MHz with up to 750 {micro}sec pulses at 2Hz. Lasing was established over the entire wavelength range of the mirrors (5.5-6.6 {micro}m). The detuning curve length, turn-on time, and power were in agreement with modeling results assuming a 1 psec FWHM micropulse. The same model predicts over 10 kW of power output with 10 mA of beam and 10% output coupling, which is the ultimate design goal of the IR Upgrade FEL. The behavior of the laser while the dispersion section strength was varied was found to qualitatively match predictions. Initial CW lasing results also will be presented.
Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Organization:
US Department of Energy; USDOE Office of Energy Research (ER) (US)
DOE Contract Number:
AC05-84ER40150
OSTI ID:
836642
Report Number(s):
JLAB-ACT-04-09; DOE/ER/40150-3122
Journal Information:
Nuclear Instruments and Methods in Physics Research Section A, Journal Name: Nuclear Instruments and Methods in Physics Research Section A Journal Issue: 1-2 Vol. 528
Country of Publication:
United States
Language:
English

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