scholarly journals Reduction of background scattered light in vacuum systems for cold atoms experiments

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105125
Author(s):  
J. Vovrosh ◽  
L. Earl ◽  
H. Thomas ◽  
J. Winch ◽  
B. Stray ◽  
...  
Keyword(s):  
Cold Atoms ◽  
Scattered Light ◽  
Vacuum Systems

scholarly journals Interplay between radiation pressure force and scattered light intensity in the cooperative scattering by cold atoms

2013 ◽  
Vol 61 (1) ◽  
pp. 18-24 ◽  
Author(s):  
T. Bienaimé ◽  
R. Bachelard ◽  
J. Chabé ◽  
M.T. Rouabah ◽  
L. Bellando ◽  
...  
Keyword(s):  
Light Intensity ◽  
Radiation Pressure ◽  
Cold Atoms ◽  
Scattered Light ◽  
Scattered Light Intensity ◽  
Pressure Force ◽  
Radiation Pressure Force

scholarly journals Signatures of optical phase transitions in superradiant and subradiant atomic arrays

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Christopher D. Parmee ◽  
Janne Ruostekoski
Keyword(s):  
Phase Transitions ◽  
Optical Bistability ◽  
Cold Atoms ◽  
Scattered Light ◽  
Mean Field Theory ◽  
Mean Field ◽  
Excited Level ◽  
Optical Phase ◽  
Planar Arrays ◽  
Intrinsic Optical Bistability

Abstract Resonant light interacting with matter supports different phases of a polarisable medium, and optical bistability where two phases coexist. Such phases have previously been actively studied in cavities. Here, we identify signatures of optical phase transitions and optical bistability mapped onto scattered light in free-space planar arrays of cold atoms. Methods on how to explore such systems in superradiant and extreme subradiant states are proposed. The cooperativity threshold and intensity regimes for the intrinsic optical bistability, supported by resonant dipole-dipole interactions alone, are derived in several cases of interest analytically. Subradiant states require lower intensities, but stronger cooperativity for the existence of non-trivial phases than superradiant states. The transmitted light reveals phase transitions and bistability that are predicted by mean-field theory as large jumps in coherent and incoherent signals and hysteresis. In the quantum solution, traces of phase transitions are identified in enhanced quantum fluctuations of excited level populations.

A SYSTEM FOR PROTECTING AN OIL DIFFUSION PUMP AGAINST FAILURE OF THE MECHANICAL FORE PUMP, COOLING WATER, OR ELECTRICITY

1970 ◽  
Vol 28 ◽  
pp. 344-345
Author(s):  
W. C. Bigelow ◽  
F. B. Drogosz ◽  
S. Nitschke
Keyword(s):  
High Vacuum ◽  
Cooling Water ◽  
Effective Protection ◽  
Pump Line ◽  
Diffusion Pump ◽  
System Pressure ◽  
Control Relay ◽  
Vacuum Systems ◽  
Vacuum Gage ◽  
Pressure Switch

High vacuum systems with oil diffusion pumps usually have a pressure switch to protect against Insufficient cooling water; however, If left unattended for long periods of time, failure of the mechanical fore pump can occur with equally serious results. The device shown schematically in Fig. 1 has been found to give effective protection against both these failures, yet it is inexpensive and relatively simple to build and operate.With this system, pressure in the fore pump line is measured by thermocouple vacuum gage TVG (CVC G.TC-004) whose output is monitored by meter relay MRy (Weston 1092 Sensitrol) which is set to close if the pressure rises above about 0.2 torr. This energizes control relay CRy (Potter & Brumfield KA5Y 120VAC SPDT) cutting off power to solenoid-operated fore line valve Vf (Cenco 94280-4 Norm. Closed) which closes to prevent further leakage of air into the diffusion pump

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

Magnetic resonance in the noise in the intensity of scattered light

1987 ◽  
Vol 153 (10) ◽  
pp. 363 ◽  
Author(s):  
Evgenii B. Aleksandrov ◽  
V.S. Zapasskii
Keyword(s):  
Magnetic Resonance ◽  
Scattered Light
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