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Magneto-optical trapping of potassium from a Zeeman cooled collimated atomic beam

Paul Simon Cooper

Jan 1, 20050 citations

Efficient Loading of a Potassium Magneto-Optical Trap

Robert S. Williamson, Thad G Walker

APSMay 1, 19960 citations

Towards a Magneto-Optical Trap of Potassium Atoms Loaded from a Cold Buffer Gas Beam

Maryam Hiradfar, Sridhar Prabhu, Yoo Kyung Lee +4 more

Bulletin of the American Physical SocietyJun 2, 20200 citations

Trapping and cooling of potassium isotopes in a double-magneto-optical-trap apparatus

M. Prevedelli, F. S. Cataliotti, Eric Cornell +5 more

We report on the efficient operation of a double-magneto-optical-trap (MOT) apparatus for potassium isotopes. Mechanisms for the cooling and the transfer between the two MOTs are studied. A magnetic quadrupole trap has been loaded from the second MOT; density and temperature appear to be promising for starting runaway evaporative cooling.

Physical Review AJan 1, 199938 citations

Magneto-optical trapping of potassium isotopes

Robert S. Williamson

Dec 1, 199711 citations

Sub-Doppler Magneto-Optical Trap for Potassium-41

Kellan Kremer

The main goal of this research is to cool potassium-41 atoms to ultracold temperatures (<10 μK) in order to study the spin dynamics of atom to atom interactions. However, our current goal is to finish constructing the apparatus that will allow us to confine and cool these atoms in three dimensions. This apparatus will cool and confine the potassium atoms in 3 steps. First, the atoms will be cooled and trapped in our 3D magneto-optical trap. This step of the experiment will cool the atoms near the Doppler-cooling limit, which for potassium atoms is 145 μK. Second, atoms will be loaded into a FORT (far off resonance trap) with an expected depth of 25 μK. In order to cool the atoms below the Doppler-cooling limit, we will use sub-Doppler cooling techniques. What is particularly unique about our experiment is that we plan to use an octupole magnetic field to achieve sub-Doppler cooling. In typical laser cooling experiments sub-Doppler temperatures are achieved when the quadrupole magnetic field is off, which leaves the atoms untrapped. Third, once the atoms have been loaded into the FORT one last cooling mechanism will be implemented. This mechanism is referred to as evaporative cooling and will cool the atoms below 10 μK.The main goal of this research is to cool potassium-41 atoms to ultracold temperatures (<10 μK) in order to study the spin dynamics of atom to atom interactions. However, our current goal is to finish constructing the apparatus that will allow us to confine and cool these atoms in three dimensions. This apparatus will cool and confine the potassium atoms in 3 steps. First, the atoms will be cooled and trapped in our 3D magneto-optical trap. This step of the experiment will cool the atoms near the Doppler-cooling limit, which for potassium atoms is 145 μK. Second, atoms will be loaded into a FORT (far off resonance trap) with an expected depth of 25 μK. In order to cool the atoms below the Doppler-cooling limit, we will use sub-Doppler cooling techniques. What is particularly unique about our experiment is that we plan to use an octupole magnetic field to achieve sub-Doppler cooling. In typical laser cooling experiments sub-Doppler temperatures are achieved when the quadrupole magnetic field is off, which leaves the atoms untrapped. Third, once the atoms have been loaded into the FORT one last cooling mechanism will be implemented. This mechanism is referred to as evaporative cooling and will cool the atoms below 10 μK.

Aug 9, 20190 citations

Cooling mechanisms in potassium magneto-optical traps

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