scholarly journals Design and Construction of Magnetic Coils for Quantum Magnetism Experiments

2020 ◽  
Vol 2 (3) ◽  
pp. 378-387
Author(s):  
Graciana Puentes
Keyword(s):  
Optical Lattice ◽  
Magnetic Trap ◽  
Spin Dynamics ◽  
Fold Increase ◽  
Small Mass ◽  
Magnetic Phase Transitions ◽  
Quantum Magnetism ◽  
Magnetic Coils ◽  
Tight Lattice ◽  
Design And Construction

We report on the design and construction of a spin-flip Zeeman slower, a quadrupole magnetic trap and a Feshbach field for a new machine for ultra-cold Li-7. The small mass of the Li-7 atom, and the tight lattice spacing, will enable to achieve a 100-fold increase in tunneling rates over comparable Rb-87 optical lattice emulator experiments. These improvements should enable to access new regimes in quantum magnetic phase transitions and spin dynamics.

scholarly journals Design and Construction of Magnetic Coils for Quantum Magnetism Experiments

2019 ◽  
Author(s):  
Graciana Puentes
Keyword(s):  
Optical Lattice ◽  
Magnetic Trap ◽  
Spin Dynamics ◽  
Fold Increase ◽  
Small Mass ◽  
Magnetic Phase Transitions ◽  
Quantum Magnetism ◽  
Magnetic Coils ◽  
Tight Lattice ◽  
Design And Construction

We report on the design and construction of a spin-flip Zeeman slower, quadrupole magnetic trap, and Feshbach fields for a new machine for ultra-cold Li-7. The small mass of the Li-7 atom, and the tight lattice spacing, will enable us to achieve a 100-fold increase in tuneling rates over comparable Rb-87 optical lattice emulator experiments. These improvements should enable to access new regimes in quantum magnetic phase transitions and spin dynamics.

Spin dynamics and magnetic phase transitions in the quasi-two-dimensional antiferromagnet Mn[C10H6(OH)(COO−)]2×2H2O

2007 ◽  
Vol 33 (5) ◽  
pp. 427-432
Author(s):  
K. G. Dergachev ◽  
M. I. Kobets ◽  
E. N. Khatsko ◽  
V. M. Khrustalev ◽  
V. A. Pashchenko
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Spin Dynamics ◽  
Magnetic Phase Transitions ◽  
Two Dimensional

scholarly journals Off-Axis Ions Extraction Simulation in Tubular Electron String Ion Source (TESIS)

2019 ◽  
Vol 201 ◽  
pp. 08001 ◽  
Author(s):  
A.Yu. Boytsov ◽  
A.A. Bulychev
Keyword(s):  
Numerical Simulations ◽  
Potential Gradient ◽  
Fold Increase ◽  
Ion Source ◽  
Basic Scheme ◽  
Ion Extraction ◽  
Design And Construction

Tubular Electron String Ion Source (TESIS) – improved version of Electron String Ion Source (ESIS) aiming for nearly 200-fold increase in ion yield – is under development at JINR. TESIS advantages over ESIS are discussed and their characteristics are compared. Basic scheme of TESIS operation is presented. One of the crucial processes in TESIS – off-axis ion extraction – requires special confilguration of output electrodes providing steep potential gradient. Numerical simulations of ion extraction trajectories for two different electrode confilgurations are compared and the optimal one is discussed. The obtained results will be useful for TESIS design and construction.

scholarly journals Short-Range Quantum Magnetism of Ultracold Fermions in an Optical Lattice

Science ◽  
2013 ◽  
Vol 340 (6138) ◽  
pp. 1307-1310 ◽  
Author(s):  
D. Greif ◽  
T. Uehlinger ◽  
G. Jotzu ◽  
L. Tarruell ◽  
T. Esslinger
Keyword(s):  
Optical Lattice ◽  
Short Range ◽  
Quantum Magnetism

Magnetism of Bismuth(III) Oxide-Based Compounds

2015 ◽  
Vol 233-234 ◽  
pp. 113-116
Author(s):  
Eleonora A. Kravchenko
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Spin Dynamics ◽  
Spin Echo ◽  
Magnetic Moments ◽  
Fold Increase ◽  
Zero Field ◽  
Line Shapes ◽  
Nuclear Magnetic Moments ◽  
Magnetic Splitting

209Bi NQR experiments, including analysis of zero-field line shapes, Zeeman-perturbed patterns and zero-field spin-echo envelopes were made to examine magnetic splitting of resonances revealed in the spectra of Main group element compounds of general composition BakBilAmOn (A=Al, В, Ge, Br, Cl). The results were explained assuming the existence in the compounds of ordered internal magnetic fields from 5 to 250 G which notably exceed those of nuclear magnetic moments. A dramatic (8−10-fold) increase in the resonance intensities, instead of broadening and fading, was observed for such compounds upon applying weak (below 500 Oe) external magnetic fields. The effect was shown to relate to the spin dynamics, namely, to the influence of external magnetic field on the nuclear spin-spin relaxation of the compounds with anomalous magnetic properties. In α-Bi2O3, paramagnetism depending on the thermal prehistory of a sample was found using SQUID-technique; magnetoelectric effect linear in magnetic field was also observed for this oxide.

scholarly journals Spin dynamics of two bosons in an optical lattice site: A role of anharmonicity and anisotropy of the trapping potential

2013 ◽  
Vol 88 (1) ◽  
Author(s):  
Joanna Pietraszewicz ◽  
Tomasz Sowiński ◽  
Mirosław Brewczyk ◽  
Maciej Lewenstein ◽  
Mariusz Gajda
Keyword(s):  
Optical Lattice ◽  
Lattice Site ◽  
Spin Dynamics ◽  
Trapping Potential

SPLITTING AND TRAPPING OF BOSE-CONDENSED GASES IN MULTI-WELLS

2005 ◽  
Vol 19 (06) ◽  
pp. 303-312
Author(s):  
M. LIU ◽  
L. H. WEN ◽  
L. SHE ◽  
A. X. CHEN ◽  
H. W. XIONG ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Potential Application ◽  
Optical Lattices ◽  
Magnetic Trap ◽  
Laser Beams ◽  
Atom Optics ◽  
One Dimensional ◽  
Experimental Scheme ◽  
Resonant Laser

For the Bose-condensed gas in a one-dimensional optical lattice, several far-off resonant laser beams are used to split and trap the matter wavepacket after switching off both the magnetic trap and optical lattices. In the presence of two far-off resonant laser beams which are not symmetric about the centre of the matter wavepacket, we propose an experimental scheme to observe the collision between two side peaks after switching off the magnetic trap and optical lattice. We also discuss an experimental scheme to realize a coherent splitting and trapping of the matter wavepacket which has potential application in atom optics.

scholarly journals Growth and Carbohydrate Metabolism of Wheat Plants Grown with Red-light Emitting Diodes

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 863C-863
Author(s):  
N.C. Yorio ◽  
M. Sanwo ◽  
C.S. Brown
Keyword(s):  
Light Emitting Diodes ◽  
Starch Content ◽  
Red Light ◽  
Fold Increase ◽  
Sucrose Phosphate Synthase ◽  
Small Mass ◽  
Fluorescent Light ◽  
Light Emitting ◽  
Carbohydrate Concentration ◽  
Red Leds

Light-emitting diodes (LEDs) are a potential light source for growing plants in space flight systems because of their superior safety and reliability, small mass and volume, electrical efficiency, and longevity. To determine the influence of narrow-spectrum LEDs on plant growth and metabolism, wheat (Triticum aestivum L. `Superdwarf') plants were grown under red LEDs (peak emission 660 nm) and compared to plants grown under daylight fluorescent, red LEDs + 1% blue fluorescent light (BL), and red LEDs + 10% BL. Plants were taller, had longer flag leaves, and delayed seed development when grown under red LEDs or red LEDs + 1% BL compared to those grown with 10% BL or under daylight fluorescent. Viable seeds (290% germination) were produced in all plants regardless of the light treatment. Total dry matter (DM), head DM, and seed DM were similar in the plants grown under the four light regimes, and there were no differences in the starch content of the seeds. Starch levels were 4-times greater and sucrose levels were 2.5-times greater in leaves of plants grown under the red LEDs compared to daylight fluorescent. Daylight fluorescent leaves showed a 1.8-fold increase in sucrose phosphate synthase (SPS) activity, a regulatory enzyme of sucrose synthesis. These results indicate that wheat can be grown successfully under red LEDs, but there are differences in carbohydrate concentration and metabolism in photosynthetic tissue.

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