A high-finesse Fabry-Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab
Journal Article
·
· Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Syracuse Univ., Syracuse, NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Old Dominion Univ., Norfolk, VA (United States)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States); Duquesne Univ., Pittsburgh, PA (United States)
- Univ. of Virginia, Charlottesville, VA (United States)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Virginia, Charlottesville, VA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States); High Energy Accelerator Research Organization (KEK), Ibaraki (Japan)
- Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Washington, Seattle, WA (United States)
- Syracuse Univ., Syracuse, NY (United States)
Here, 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 1.0 GeV and 50 μA.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
- Grant/Contract Number:
- AC05-06OR23177; FG02-84ER40146
- OSTI ID:
- 1245139
- Alternate ID(s):
- OSTI ID: 1359647
OSTI ID: 22561996
- Report Number(s):
- DOE/OR/23177--3783; JLAB-PHY--16-2236; arXiv:1601.00251; PII: S016890021630119X
- Journal Information:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 822; ISSN 0168-9002
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Precision electron beam polarimetry for next generation nuclear physics experiments
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journal | July 2018 |
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