A precise synchronization between the laser repetition rate and the linac RF is mandatory for electro-optic sampling or pump-probe experiments. The level of stability is usually determined by ...measuring the spectral noise power density of the feedback signal when the system is locked. However, an independent measurement is needed to confirm this. In this paper, we present an approach exploiting electronic techniques to synchronize a TiSa laser to the RF of the DESY VUVFEL with sub-70 fs rms stability. The remaining time jitter is measured by an RF monitoring system independent of the locking PLL.
Various epiphyseal neuropeptides, participating in regulation of the secretory processes, are capable of inducing systemic changes. This circumstance determines both pharmacological and therapeutic ...properties. The drug elitalamine, representing a polypeptide extract, ensures effective treatment of the immune system and brain disorders and tumors and allows a prophylaxis of tissue aging.
We applied Frequency Map Analysis (FMA) - a method that is widely used to explore dynamics of Hamiltonian systems - to beam-beam effects study. The method turned out to be rather informative and ...illustrative in the case of a novel Crab Waist collision approach, when "crab" focusing of colliding beams results in significant suppression of betatron coupling resonances. Application of FMA provides visible information about all working resonances, their widths and locations in the planes of betatron tunes and betatron amplitudes, so the process of resonances suppression due to the beams crabbing is clearly seen.
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