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| TUPPH082 |
Generation of Radial Polarized Laser Beam and its Applications for Accelerator
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435 |
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- A. Maekawa, M. Uesaka
The University of Tokyo, Nuclear Professional School, Ibaraki-ken
- H. Tomizawa
JASRI/SPring-8, Hyogo-ken
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We are developing the methods to generate the radial/azimuth polarized laser beam for accelerator applications. Radial polarized laser propagation modes exists theoretically and were recently generated practically. We generate radial polarized beam from linear polarized beam using a liquid crystal (LC) cell or 8-divided wave plates. A LC cell utilizes the twisted nematic effect and we apply it for broad spectral bandwidth EOS applications. We have several applications with radial polarization. For example, radial polarization consists of TEM01 and TEM10 mode which have orthogonal linear polarization. So, we can decompose radial polarization into TEM01 and TEM10 mode using a polarizer and switch the two modes easily using a half wave plate. It is the quite simple and robust method to generate pure TEM01 mode and available for laser wire monitor with high spatial resolution of less than micrometer. Radial polarization can be also effective for 3D EOS bunch monitors and generation of Z polarization for a high brightness photocathode.
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