نتایج جستجو برای: atom laser
تعداد نتایج: 230176 فیلتر نتایج به سال:
We report on an experimental measurement of the phase shifts associated with the AC Stark effect. The optically induced light shift was measured using a Ramsey fringe technique and we have made detailed studies of the potential sources of coherence loss that can occur for an atomic sample manipulated by light. We investigated the loss of coherence due to the light shifts induced by using a non-...
b) Atoms have some probability of absorbing photons from the laser beam, thereby being kicked along the direction of the beam. This processes can be modelled classically by supposing that the polarizability of the atom has an imaginary part: α = α′ + iα′′. Deduce the (time-averaged) force on an atom along the direction of propagation of a linearly polarized plane electromagnetic wave in terms o...
In this paper, we present the status of the line for laser-driven light ions acceleration (L3IA) currently under implementation at the Intense Laser Irradiation Laboratory (ILIL), and we provide an overview of the pilot experimental activity on laser-driven ion acceleration carried out in support of the design of the line. A description of the main components is given, including the laser, the ...
Two-component entangled atom laser is obtained via quantum state transfer technique from lights to matter waves in a five-level M -type system. The considered atom-atom collisions can yield an effective Kerr susceptibility for this system and lead to the selfand crossphase modulation between the two output atom lasers. This effect results in generation of entangled states of output atom lasers....
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In this study, electrons were injected into a laser plasma accelerator using colliding laser pulses. By varying the parameters of the injection laser pulse, the amount of charge accelerated in the plasma wave could be controlled. This external control of the injected load was used to investigate beam loading of the accelerating structure and especially its influence on the electron beam energy ...
A proposed laser-plasma based electron source [1] using laser triggered injection of electrons is examined. The source generates ultrashort electron bunches by dephasing background plasma electrons undergoing fluid oscillations in a plasma wake. The plasma electrons are dephased by colliding two counter-propagating laser pulses. Laser intensity thresholds for trapping and optimal wake phase for...
Because of the unique laser–matter interaction processes involved, femtosecond laser micro-machining and femtosecond laser materials processing techniques are developing rapidly to stages where they may be introduced into manufacturing. Yet in both these areas, some complex interaction phenomena are not fully understood. In this talk we describe two studies of fundamental processes that impact ...
Laser-induced fluorescence (LIF) of carbon dioxide is investigated with excitation between 215 and 255 nm with spectrally resolved detection in 5–40 bar premixed CH4/O2/Ar and CH4/air flat-flames at fuel/air ratios between 0.8 and 1.9. The LIF signal consists of a broad (200–450 nm) continuum with a faint superimposed structure, and this signal is absent in similar H2/O2/Ar flames. There is str...
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