A high-finesse Fabry–Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab
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2016
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Abstract
A high-finesse Fabry–Perot cavity with a frequency-doubled continuous wave green laser (532 nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064 nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO3 crystal. The maximum achieved green power at 5 W infrared pump power is 1.74 W with a total conversion efficiency of 34.8%. The green beam is injected into the optical resonant cavity and enhanced up to 3.7 kW with a corresponding enhancement of 3800. The polarization transfer function has been measured in order to determine the intra-cavity circular laser polarization within a measurement uncertainty of 0.7%. The PREx experiment at Jefferson Lab used this system for the first time and achieved 1.0% precision in polarization measurements of an electron beam with energy and current of 1.06 GeV and 50 μA.
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tobias2016nucleara
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| Authors | A. Rakhman,M. Hafez,S. Nanda,F. Benmokhtar,A. Camsonne,G.D. Cates,M.M. Dalton,Gregg Franklin,M. Friend,R.W. Michaels,V. Nelyubin,Diana Parno,K.D. Paschke,Brian Quinn,P.A. Souder,W.A. Tobias;A. Rakhman;M. Hafez;S. Nanda;F. Benmokhtar;A. Camsonne;G.D. Cates;M.M. Dalton;Gregg Franklin;M. Friend;R.W. Michaels;V. Nelyubin;Diana Parno;K.D. Paschke;Brian Quinn;P.A. Souder;W.A. Tobias; |
| Journal | nuclear instruments and methods in physics research section a: accelerators, spectrometers, detectors and associated equipment |
| Year | 2016 |
| DOI |
10.1016/j.nima.2016.03.085
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