Microwave System for a Solid Proton Target Polarized via Optical Pumping

다국어 초록 (Multilingual Abstract)

We present the microwave system of the polarizer set-up for the solid proton target used in investigating the spin-orbit properties of unstable nuclei. Such a target is a paramagnetic radical-doped crystal having a high hydrogen density. Through the absorbtion of laser light of an appropriate frequency, the dopant’s electrons become polarized, and through the application of the microwave system’s oscillating magnetic field at the particular frequency and amplitude that satisfies the Hartmann-Hahn condition for resonance, the electrons polarization is transferred to the protons. Thus, the microwave system plays the most important role in solid proton target polarization. The microwave signal is initially generated in the network analyzer, enhanced via the amplifier, monitored with a power meter, and converted to an oscillating magnetic field in the loop-gap resonator. We observed the resonance of our loop gap-generator around 4.5 GHz with a scattering parameter of $\sim$-45 dB.

참고문헌 (Reference)

1 S. Sakaguchi, University of Tokyo 2008

2 D. J. Sloop, 75 : 3746-, 1981

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