Measuring Gravitational Effect of Superintense Laser by Spin-Squeezed Bose-Einstein Condensates Interferometer

2021 ◽  
Author(s):  
Eng Boon Ng ◽  
C. H. Raymond Ooi
Keyword(s):  
Gravitational Force ◽  
Einstein Field Equation ◽  
Gravitational Effect ◽  
Atom Interferometer ◽  
Intense Laser ◽  
Squeezing Effect ◽  
Intense Laser Field ◽  
High Intensity Laser ◽  
Bose Einstein ◽  
Intensity Laser

Abstract In this article, we consider an extremely intense laser, enclosed by an atom interferometer. The gravitational potential generated from the high-intensity laser is solved from the Einstein field equation under the Newtonian limit. We compute the strength of the gravitational force and study the feasibility of measuring the force by the atom interferometer. The intense laser field from the laser pulse can induce a phase change in the interferometer with Bose-Einstein condensates. We push up the sensitivity limit of the interferometer with Bose-Einstein condensates by spin-squeezing effect and determine the sensitivity gap for measuring the gravitational effect from intense laser by atom interferometer.

Molecules in high-intensity laser fields

1996 ◽  
Vol 74 (6) ◽  
pp. 1236-1247 ◽  
Author(s):  
T.-T. Nguyen-Dang ◽  
F. Châteauneuf ◽  
S. Manoli
Keyword(s):  
High Order ◽  
Molecular Structures ◽  
Intense Laser ◽  
Intense Laser Field ◽  
Strongly Coupled ◽  
System A ◽  
High Intensity Laser ◽  
Quantized Field ◽  
Quantized Radiation Field ◽  
Intensity Laser

The separability of a dressed molecule, a composite molecule + quantized radiation field system, at high field intensities is examined. Various forms of the Hamiltonian describing the dressed molecule are reviewed and are used to assess the zeroth-order separability of the dressed system. A new high-order adiabatic separation between the strongly coupled quantized field and molecular subsystems is derived. Qualitative manifestations of laser-induced molecular structures are discussed within this high-order adiabatic representation. Key words: dynamics, dressed molecule, intense laser field, adiabatic separation, laser-induced molecular structure.

scholarly journals New estimation of the curvature effect for the X-ray vacuum diffraction induced by an intense laser field

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
Y Seino ◽  
T Inada ◽  
T Yamazaki ◽  
T Namba ◽  
S Asai
Keyword(s):  
Free Electron Laser ◽  
Quantum Electrodynamics ◽  
Laser Field ◽  
Intense Laser ◽  
Curvature Effect ◽  
Intense Laser Field ◽  
X Ray ◽  
High Intensity Laser ◽  
New Formula ◽  
Intensity Laser

Abstract Quantum electrodynamics predicts X-ray diffractions under a high-intensity laser field via virtual charged particles, and this phenomenon is called vacuum diffraction (VD). In this paper, we derive a new formula to describe VD in a head-on collision geometry of an X-ray free-electron laser (XFEL) pulse and a laser pulse. The wavefront curvature of the XFEL pulse is newly considered in this formula. With this formula, we also discuss the curvature effect on VD signals based on realistic parameters at the SACLA XFEL facility.

scholarly journals Escaping Electrons from Intense Laser-Solid Interactions as a Function of Laser Spot Size

2018 ◽  
Vol 167 ◽  
pp. 02001 ◽  
Author(s):  
Dean Rusby ◽  
Ross Gray ◽  
Nick Butler ◽  
Rachel Dance ◽  
Graeme Scott ◽  
...  
Keyword(s):  
Rear Surface ◽  
Spot Size ◽  
Intense Laser ◽  
Laser Spot Size ◽  
Particle In Cell ◽  
High Intensity Laser ◽  
Electric Potentials ◽  
Initial Interaction ◽  
Intensity Laser ◽  
Laser Solid Interactions

The interaction of a high-intensity laser with a solid target produces an energetic distribution of electrons that pass into the target. These electrons reach the rear surface of the target creating strong electric potentials that act to restrict the further escape of additional electrons. The measurement of the angle, flux and spectra of the electrons that do escape gives insights to the initial interaction. Here, the escaping electrons have been measured using a differentially filtered image plate stack, from interactions with intensities from mid 1020-1017 W/cm2, where the intensity has been reduced by defocussing to increase the size of the focal spot. An increase in electron flux is initially observed as the intensity is reduced from 4x1020 to 6x1018 W/cm2. The temperature of the electron distribution is also measured and found to be relatively constant. 2D particle-in-cell modelling is used to demonstrate the importance of pre-plasma conditions in understanding these observations.

scholarly journals Single-shot electrons and protons time-resolved detection from high-intensity laser–solid matter interactions at SPARC_LAB

2019 ◽  
Vol 7 ◽  
Author(s):  
F. Bisesto ◽  
M. Galletti ◽  
M. P. Anania ◽  
M. Ferrario ◽  
R. Pompili ◽  
...  
Keyword(s):  
Intense Laser ◽  
Test Facility ◽  
Particle Accelerators ◽  
Single Shot ◽  
X Rays ◽  
Time Resolved ◽  
Laser Plasma Interactions ◽  
High Intensity Laser ◽  
Set Up ◽  
Intensity Laser

Laser–plasma interactions have been studied in detail over the past twenty years, as they show great potential for the next generation of particle accelerators. The interaction between an ultra-intense laser and a solid-state target produces a huge amount of particles: electrons and photons (X-rays and $\unicode[STIX]{x03B3}$ -rays) at early stages of the process, with protons and ions following them. At SPARC_LAB Test Facility we have set up two diagnostic lines to perform simultaneous temporally resolved measurements on both electrons and protons.

scholarly journals Pair production by Schwinger and Breit–Wheeler processes in bi-frequent fields

2016 ◽  
Vol 82 (3) ◽  
Author(s):  
A. Otto ◽  
T. Nousch ◽  
D. Seipt ◽  
B. Kämpfer ◽  
D. Blaschke ◽  
...  
Keyword(s):  
Pair Production ◽  
High Frequency ◽  
Polarized Light ◽  
High Energy ◽  
Intense Laser ◽  
Laser Beams ◽  
High Intensity Laser ◽  
Linearly Polarized ◽  
Intensity Laser ◽  
Probe Photon

Counter-propagating and suitably polarized light (laser) beams can provide conditions for pair production. Here, we consider in more detail the following two situations: (i) in the homogeneity regions of anti-nodes of linearly polarized ultra-high intensity laser beams, the Schwinger process is dynamically assisted by a second high-frequency field, e.g. by an XFEL beam; and (ii) a high-energy probe photon beam colliding with a superposition of co-propagating intense laser and XFEL beams gives rise to the laser-assisted Breit–Wheeler process. The prospects of such bi-frequent field constellations with respect to the feasibility of conversion of light into matter are discussed.

scholarly journals Measurement of the angle, temperature and flux of fast electrons emitted from intense laser–solid interactions

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
D. R. Rusby ◽  
L. A. Wilson ◽  
R. J. Gray ◽  
R. J. Dance ◽  
N. M. H. Butler ◽  
...  
Keyword(s):  
High Intensity ◽  
Rear Surface ◽  
High Energy ◽  
Intense Laser ◽  
Rear Side ◽  
Measured Signal ◽  
X Rays ◽  
High Intensity Laser ◽  
Intensity Laser ◽  
Laser Solid Interactions

High-intensity laser–solid interactions generate relativistic electrons, as well as high-energy (multi-MeV) ions and x-rays. The directionality, spectra and total number of electrons that escape a target-foil is dependent on the absorption, transport and rear-side sheath conditions. Measuring the electrons escaping the target will aid in improving our understanding of these absorption processes and the rear-surface sheath fields that retard the escaping electrons and accelerate ions via the target normal sheath acceleration (TNSA) mechanism. A comprehensive Geant4 study was performed to help analyse measurements made with a wrap-around diagnostic that surrounds the target and uses differential filtering with a FUJI-film image plate detector. The contribution of secondary sources such as x-rays and protons to the measured signal have been taken into account to aid in the retrieval of the electron signal. Angular and spectral data from a high-intensity laser–solid interaction are presented and accompanied by simulations. The total number of emitted electrons has been measured as $2.6\times 10^{13}$ with an estimated total energy of $12\pm 1~\text{J}$ from a $100~{\rm\mu}\text{m}$ Cu target with 140 J of incident laser energy during a $4\times 10^{20}~\text{W}~\text{cm}^{-2}$ interaction.

Investigation of the ejected mass during high-intensity laser solid interaction for improved plasma mirror generation

2022 ◽  
Author(s):  
Gregor F. H. Indorf ◽  
Graeme G Scott ◽  
Malte A. Ennen ◽  
Pierre Forestier-Colleoni ◽  
David Haddock ◽  
...  
Keyword(s):  
High Intensity ◽  
Contrast Ratio ◽  
Average Power ◽  
Laser Pulses ◽  
High Repetition Rate ◽  
Ultrashort Laser Pulses ◽  
Intense Laser ◽  
High Intensity Laser ◽  
Laser Systems ◽  
Intensity Laser

Abstract The interaction of very intense and ultrashort laser pulses with solid targets is a topic that has attracted a large amount of interest in science and applications. This interest is boosted by the large progress made in the development of high repetition rate, high-power laser systems. With the significant increase in average power, there is concern about how to deal with ablated debris that may lead to contamination and damage during interaction experiments with solid targets. This issue is also highly relevant in experiments that include plasma mirrors. These are often employed to increase the contrast ratio of the intense laser pulse to unwanted laser pre-pulses from the amplifier chain and/or the background of amplified spontaneous emission. For this reason, the present work investigates the mass ejected from the target into vacuum for different conditions, particularly those present when plasma mirrors are introduced. The total amount of ablated mass can be reduced by making use of a temporally controlled plasma expansion that enhances the plasma mirror reflectivity. In this way, high intensity laser interaction experiments can be carried out with efficient and clean plasma mirrors significantly reducing the degradation of the laser optics and plasma diagnostics placed near the interaction.

scholarly journals Self-focusing up to the incident laser wavelength by an appropriate density ramp

2011 ◽  
Vol 29 (4) ◽  
pp. 453-458 ◽  
Author(s):  
R. Sadighi-Bonabi ◽  
M. Moshkelgosha
Keyword(s):  
Beam Width ◽  
Laser Pulses ◽  
Laser Wavelength ◽  
Intense Laser ◽  
Uniform Density ◽  
Density Profiles ◽  
Self Focusing ◽  
High Intensity Laser ◽  
Unmagnetized Plasma ◽  
Intensity Laser

AbstractThis work is devoted to improving relativistic self-focusing of intense laser beam in underdense unmagnetized plasma. New density profiles are introduced to achieve beam width parameter up to the wavelength of the propagating laser. By investigating variations of the beam width parameter in presence of different density profiles it is found that the beam width parameter is considerably decreased for the introduced density ramp comparing with uniform density and earlier introduced density ramp profiles. By using this new density profile high intensity laser pulses are guided over several Rayleigh lengths with extremely small beam width parameter.

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