scholarly journals Arbitrarily shaped high-coherence electron bunches from cold atoms

2011 ◽  
Vol 7 (10) ◽  
pp. 785-788 ◽  
Author(s):  
A. J. McCulloch ◽  
D. V. Sheludko ◽  
S. D. Saliba ◽  
S. C. Bell ◽  
M. Junker ◽  
...  
Keyword(s):  
Cold Atoms ◽  
Electron Bunches ◽  
High Coherence

scholarly journals High-coherence picosecond electron bunches from cold atoms

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
A. J. McCulloch ◽  
D. V. Sheludko ◽  
M. Junker ◽  
R. E. Scholten
Keyword(s):  
Cold Atoms ◽  
Electron Bunches ◽  
High Coherence

scholarly journals High-coherence electron bunches produced by femtosecond photoionization

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
W. J. Engelen ◽  
M. A. van der Heijden ◽  
D. J. Bakker ◽  
E. J. D. Vredenbregt ◽  
O. J. Luiten
Keyword(s):  
Electron Bunches ◽  
High Coherence

scholarly journals High-Coherence Electron and Ion Bunches From Laser-Cooled Atoms

2014 ◽  
Vol 20 (4) ◽  
pp. 1008-1014 ◽  
Author(s):  
Ben M. Sparkes ◽  
Daniel J. Thompson ◽  
Andrew J. McCulloch ◽  
Dene Murphy ◽  
Rory W. Speirs ◽  
...  
Keyword(s):  
Spatial Coherence ◽  
Cold Atom ◽  
Coulomb Explosion ◽  
Ion Source ◽  
Three Dimensions ◽  
Uniform Density ◽  
Diffractive Imaging ◽  
Electron Bunches ◽  
Cold Electron Source ◽  
High Coherence

AbstractCold atom electron and ion sources produce electron bunches and ion beams by photoionization of laser-cooled atoms. They offer high coherence and the potential for high brightness, with applications including ultra-fast electron-diffractive imaging of dynamic processes at the nanoscale. The effective brightness of electron sources has been limited by nonlinear divergence caused by repulsive interactions between the electrons, known as the Coulomb explosion. It has been shown that electron bunches with ellipsoidal shape and uniform density distribution have linear internal Coulomb fields, such that the Coulomb explosion can be reversed using conventional optics. Our source can create bunches shaped in three dimensions and hence in principle achieve the transverse spatial coherence and brightness needed for picosecond-diffractive imaging with nanometer resolution. Here we present results showing how the shaping capability can be used to measure the spatial coherence properties of the cold electron source. We also investigate space-charge effects with ions and generate electron bunches with durations of a few hundred picoseconds. Future development of the cold atom electron and ion source will increase the bunch charge and charge density, demonstrate reversal of Coulomb explosion, and ultimately, ultra-fast coherent electron-diffractive imaging.

A High-Voltage Terminal for a Field-Emission Gun

1972 ◽  
Vol 30 ◽  
pp. 428-429
Author(s):  
N. F. Ziegler
Keyword(s):  
Field Emission ◽  
High Voltage ◽  
Atmospheric Pressure ◽  
Power Supplies ◽  
High Coherence

A high-voltage terminal has been constructed for housing the various power supplies and metering circuits required by the field-emission gun (described elsewhere in these Proceedings) for the high-coherence microscope. The terminal is cylindrical in shape having a diameter of 14 inches and a length of 24 inches. It is completely enclosed by an aluminum housing filled with Freon-12 gas at essentially atmospheric pressure. The potential of the terminal relative to ground is, of course, equal to the accelerating potential of the microscope, which in the present case, is 150 kilovolts maximum.

Loading a dressed Zeeman trap with cold atoms

2004 ◽  
Vol 116 ◽  
pp. 247-252 ◽  
Author(s):  
Y. Colombe ◽  
B. Mercier ◽  
H. Perrin ◽  
V. Lorent
Keyword(s):  
Cold Atoms

Strategic Applications of Ultra-Cold Atoms

2008 ◽  
Author(s):  
Mara Prentiss ◽  
Vladan Vuletic Mark /Kasevich ◽  
Wolfgang Ketterle ◽  
Pierre Meystre
Keyword(s):  
Cold Atoms
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