12 results found
Williams H, Truppe S, Hambach M, et al., Characteristics of a magneto-optical trap of molecules, New Journal of Physics, ISSN: 1367-2630
We present the properties of a magneto-optical trap (MOT) of CaFmolecules. We study the process of loading the MOT from a decelerated bu er-gas-cooled beam, and how best to slow this molecular beam in order to capture the most molecules. We determine how the number of molecules, the photon scattering rate, the oscillation frequency, damping constant, temperature, cloud size and lifetime depend on the key parameters of the MOT, especially the intensity and detuning of the main cooling laser. We compare our results to analytical and numerical models, to the properties of standard atomic MOTs, and to MOTs of SrF molecules. We load up to 2 x 10⁴ molecules, and measure a maximum scattering rate of 2.5 x 10⁶ s⁻¹ per molecule, a maximum oscillation frequency of 100 Hz, a maximum damping constant of 500 s⁻¹, and a minimum MOT rms radius of 1.5 mm. A minimum temperature of 730 μK is obtained by ramping down the laser intensity to low values. The lifetime, typically about 100 ms, is consistent with a leak out of the cooling cycle with a branching ratio of about 6 x 10⁻⁶. The MOT has a capture velocity of about 11 m/s.
Williams H, Truppe S, Hambach M, et al., Characteristics of a magneto-optical trap of molecules, New Journal of Physics
Fitch NJ, 2017, What Goes Up Must Come Down, Physics, Vol: 9
Fitch NJ, Tarbutt MR, 2016, Principles and Design of a Zeeman-Sisyphus Decelerator for Molecular Beams, CHEMPHYSCHEM, Vol: 17, Pages: 3609-3623, ISSN: 1439-4235
Fitch NJ, Tarbutt MR, 2016, Inside Cover: Principles and Design of a Zeeman-Sisyphus Decelerator for Molecular Beams (ChemPhysChem 22/2016), ChemPhysChem, Vol: 17, Pages: 3579-3579, ISSN: 1439-4235
Fabrikant MI, Li T, Fitch NJ, et al., 2014, Method for traveling-wave deceleration of buffer-gas beams of CH, PHYSICAL REVIEW A, Vol: 90, ISSN: 1050-2947
Parazzoli LP, Fitch NJ, Zuchowski PS, et al., 2011, Large Effects of Electric Fields on Atom-Molecule Collisions at Millikelvin Temperatures, PHYSICAL REVIEW LETTERS, Vol: 106, ISSN: 0031-9007
Fitch NJ, Weidner CA, Parazzoli LP, et al., 2009, Experimental Demonstration of Classical Hamiltonian Monodromy in the 1:1:2 Resonant Elastic Pendulum, PHYSICAL REVIEW LETTERS, Vol: 103, ISSN: 0031-9007
Parazzoli LP, Fitch N, Lobser DS, et al., 2009, High-energy-resolution molecular beams for cold collision studies, NEW JOURNAL OF PHYSICS, Vol: 11, ISSN: 1367-2630
Fitch N, Bliven W, Mitchell T, 2007, Automating data acquisition for the Cavendish balance to improve the measurement of G, AMERICAN JOURNAL OF PHYSICS, Vol: 75, Pages: 309-312, ISSN: 0002-9505
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