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Vortex-type magnetizing coils are gaining more and more attention to activate bulk superconductors in pulsed-field magnetization (PFM) studies, compared with solenoid-type ones. Following existing reports, we present experimental results of the different penetration patterns of magnetic flux between the two kinds of coils. It was found that the magnetic flux will primarily penetrate inside the bulk...
We examined a new type of organic nonlinear optical crystal, 4-dimethylamino-N-methyl-4-stilbazolium p-chlorobenzenesulfonate (DASC) as terahertz (THz) wave source via difference frequency generation (DFG), by comparing the THz-wave radiation from DAST crystal. We demonstrated the possibility that DASC crystal has some advantages as THz-DFG source in efficiency and damage threshold.
We investigated the Cherenkov phase-matched tunable THz-wave radiation via difference frequency generation from a lithium niobate crystal (LN) excited by a dual wavelength Cr:Forsterite laser by using the two types of detectors, Si bolometer and Shottkey barrier diode (SBD). We demonstrated that Si bolometer can be useful in the frequency range of 0.2 to 2.3THz and SBD can be useful in the frequency...
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