High Atom Number in Microsized Atom Traps

2015 ◽  
Author(s):  
Joshua M. Grossman
Keyword(s):  
Atom Number ◽  
Atom Traps

scholarly journals Experimental investigation of optical atom traps with a frequency jump

2006 ◽  
Vol 39 (5) ◽  
pp. 1159-1168 ◽  
Author(s):  
P Ahmadi ◽  
G Behinaein ◽  
B P Timmons ◽  
G S Summy
Keyword(s):  
Experimental Investigation ◽  
Frequency Jump ◽  
Atom Traps

scholarly journals Observation of Microcanonical Atom Number Fluctuations in a Bose-Einstein Condensate

2021 ◽  
Vol 126 (15) ◽  
Author(s):  
M. B. Christensen ◽  
T. Vibel ◽  
A. J. Hilliard ◽  
M. B. Kruk ◽  
K. Pawłowski ◽  
...  
Keyword(s):  
Einstein Condensate ◽  
Atom Number ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Nonadiabatic losses from radio-frequency-dressed cold-atom traps: Beyond the Landau-Zener model

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
Kathryn A. Burrows ◽  
Hélène Perrin ◽  
Barry M. Garraway
Keyword(s):  
Radio Frequency ◽  
Cold Atom ◽  
Zener Model ◽  
Atom Traps

Determination of effective atomic numbers and electron densities for some synthesized triazoles from the measured total mass attenuation coefficients at different energies

2019 ◽  
Vol 97 (1) ◽  
pp. 86-92 ◽  
Author(s):  
F. Akman ◽  
I.H. Geçibesler ◽  
I. Demirkol ◽  
A. Çetin
Keyword(s):  
Total Mass ◽  
Effective Atomic Number ◽  
Electron Densities ◽  
Atom Number ◽  
Attenuation Coefficients ◽  
Effective Electron ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Theoretical Results ◽  
Mass Attenuation

The effective atomic numbers and electron densities of some synthesized triazoles were determined using the experimental values of total mass attenuation coefficients at 13.93, 17.77, 26.34, and 59.54 keV photon energies. The measurements were performed in a transmission geometry that consists of a Si(Li) detector, an 241Am point source and a target. The measured results were compared with two different theoretical results. The measured results are generally consistent with the theoretical results. It is observed that the measured parameters depend on the photon energy, weighted contributions of the individual atoms within the triazoles, atom number in the triazoles, and chemical composition of triazoles. Also, the effective electron density increases linearly with increasing effective atomic number.

scholarly journals Synthesis, Structure and Photoluminescence Properties of 2D Organic–Inorganic Hybrid Perovskites

2019 ◽  
Vol 9 (23) ◽  
pp. 5211 ◽  
Author(s):  
Liu ◽  
Li ◽  
Yao ◽  
He ◽  
Liu ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Laser Power ◽  
Radiation Detection ◽  
Photoluminescence Properties ◽  
Atom Number ◽  
Layer Spacing ◽  
Inorganic Hybrid ◽  
Potential Applications ◽  
Halide Perovskites ◽  
Organic Amines

Two-dimensional (2D) layered hybrid organic–inorganic perovskites have potential applications in solar cells, electroluminescent devices and radiation detection because of their unique optoelectronic properties. In this paper, four 2D layered hybrid organic–inorganic halide perovskites of (C6H5CH2NH3)2PbCl4, (C6H5CH2NH3)2PbBr4, (C6H5CH2NH3)2PbI4 and (C4H9NH3)2PbBr4 were synthesized by solvent evaporation. Their crystal structure and surface morphology were studied. The effects of different halogens and organic amines on perovskites’ absorption spectra were investigated, and the photoluminescence (PL) properties were studied by femtosecond ultrafast spectroscopy. The experimental results show that the four perovskites are well crystallized and oriented. With the increase of halogen atom number (Cl, Br, I) in turn, the UV-Vis absorption spectra peaks of perovskites redshift due to the increasing of the layer spacing, but organic amines have little effect on the spectra of perovskites. The PL intensity increases with increasing laser power, but the lifetime decreases with increasing laser power, which is mainly due to the non-geminate recombination. This research is of great significance for realizing the spectral regulation of organic–inorganic hybrid perovskites and promoting their application in nano-photonics and optoelectronic devices.

A large-scale cold atom source in an integrating sphere

2014 ◽  
Vol 28 (14) ◽  
pp. 1450116 ◽  
Author(s):  
Ben-Chang Zheng ◽  
Hua-Dong Cheng ◽  
Yan-Ling Meng ◽  
Peng Liu ◽  
Xiu-Mei Wang ◽  
...  
Keyword(s):  
Large Scale ◽  
Cold Atoms ◽  
Signal To Noise Ratio ◽  
Atomic Clock ◽  
Cold Atom ◽  
Integrating Sphere ◽  
Cooling Power ◽  
Atom Number ◽  
Atom Source ◽  
Good Signal

An integrating sphere with a diameter of 10 cm is developed for cooling atoms. The maximum number of 2 × 1010 cold atoms is obtained from a background vapor with 220 mW cooling laser power. The cold atom number can be increased by further increasing the cooling power. Such cold atom source would have potential use for Raman–Ramsey atomic clock with good signal-to-noise ratio (SNR).

Magnetic fluctuation level in disruption plasmas in the TEXTOR tokamak

2009 ◽  
Vol 76 (1) ◽  
pp. 101-106 ◽  
Author(s):  
X. YANG ◽  
J. LIU ◽  
T. GAO ◽  
M. LI ◽  
Y. J. SHI ◽  
...  
Keyword(s):  
Loss Rate ◽  
Plasma Phys ◽  
Runaway Electrons ◽  
Dimensional Model ◽  
Atom Number ◽  
Magnetic Fluctuation ◽  
Control Fusion

AbstractRunaway transport is used to probe the magnetic fluctuation level for TEXTOR disruption plasmas. A zero-dimensional model of the current quench including the generation of runaway electrons has been applied to simulate the experimental current evolution during major disruptions [Plasma Phys. Control. Fusion50 (2008), 105007]. According to the loss rate of runaway electrons used in the fitting parameter of the zero-dimensional model, the magnetic fluctuation level in TEXTOR is derived. It is found that the magnetic fluctuation level is in the order of 10−5, and it increases with the atom number mixed into the plasma.

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