As conventional intercepting diagnostics will not withstand high intensity ion beams, Beam Induced Fluorescence (BIF) profile monitors constitute a preeminent alternative for non-intercepting profile measurements [1]. This diagnostic technique makes use of the optical fluorescence emission of beam-excited gases. Recently BIF became an important diagnostic tool for transversal beam profile measu...

Coupled modes of homogeneous coupled multi-core fiber are selectively excited and discriminated utilizing the difference of equivalent propagation angle. To quantatively evaluate the extinction ratio (selectivity) of adjacent modes, a new mode discrimination technique is developed by measuring the visibility of far-field patterns under small change of wavelength of the launching beam. The peak ...

Coherent broadband radiation in the form of Rabi sidebands is observed when a ps probe laser propagates through a weakly ionized, electronically excited microplasma generated in the focus of an intense pump beam. The sidebands arise from the interaction of the probe beam with pairs of excited states of a constituent neutral atom via the probe-induced Rabi oscillation. Sideband shifting of >90 m...

We propose a novel general approximation to transform and simplify the description of complex fully quantized system describing interacting light matter. The method has some similarities time-dependent Born–Oppenheimer approach: we consider quantum rather than nuclei follow similar separation procedure. Our allows us obtain decoupled for light-excited matter “dressed” connected parametrically. ...

We discuss the treatment of squeezed states as excitations in the Euclidean vacuum of de Sitter space. A comparison with the treatment of these states as candidate noparticle states, or alpha-vacua, shows important differences already in the free theory. At the interacting level alpha-vacua are inconsistent, but squeezed state excitations seem perfectly acceptable. Indeed, matrix elements can b...

The geometries and energetics of the ground and lower-lying singlet excited states S0, La, and Lb of 1-naphthol (NpOH)-(NH3)n (n = 0-5) clusters have been computed using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) methods. Cluster size dependence of the excited state proton transfer (ESPT) reaction was investigated by the vertical transitions from the g...

Instrumentation for stroboscopic time-resolved diffraction studies at low temperatures is described. Exciting laser light is delivered to the crystal through an optical fiber. During the diffraction experiment, fluorescence from the sample is focused onto a fiber optic bundle surrounding the laser-light fiber, and monitored by a photodiode. A rotating slotted disk produces a pulsed X-ray beam w...

The 'magnon parametron' is a ferromagnetic particle that parametrically excited by microwaves in cavity. Above certain threshold of the microwave power, bistable steady state emerges forms an effective Ising spin. We calculate dynamics magnon parametron as function applied magnetic field and temperature for interacting system, taking into account thermal quantum fluctuations. predict three dyna...