Submillimeter laser Stark spectroscopy of 14ND3

Bhattacharjee, R. L.; Johnston, L. H.; Sudhakaran, G. R.; Sarker, J. C.

doi:10.1016/0022-2852(89)90096-9

Cited by 17 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The force fields m · a⃗ for the molecules as a function of their position r⃗ have been calculated using the simulated electric fields and gradients, obtained directly from COMSOL Multiphysics, and the Stark energy W and mass m of the molecules according to with the effective dipole moment μ eff of the molecule for a given electric field strength E = | E⃗ | The Stark energy of the 15 ND 3 molecules in their | J K 〉 = |1 1〉 state was calculated according to 42 with W inv = 1430.336 MHz 28 and μ = 1.48 D …”

Section: Numerical Simulationsmentioning

confidence: 99%

“…The magnitude of the electric field and the field gradient vectors were exported on a grid with sampling periods of 0.1 mm and were integrated in the program package libcoldmol 41 which allows one to numerically calculate, using the Monte Carlo method, the trajectories of the molecules in a molecular packet through the molecular beamline as a function of time. The Stark energy of the 15 ND 3 molecules in their |J K〉 ) |1 1〉 state was calculated according to 42 with W inv ) 1430.336 MHz 28 and µ ) 1.48 D. 43 We created initial molecular packets using Gaussian (z, V x , V y , V z ) or uniform (x, y) random distributions in phase space. By integrating the equation of motion using the Runge-Kutta formalism (Cash-Karp (4,5) or Prince-Dormand (8,9)) the trajectories of typically one million molecules were calculated.…”

Section: Numerical Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

A Linear AC Trap for Polar Molecules in Their Ground State

et al. 2007

View full text Add to dashboard Cite

A linear AC trap for polar molecules in high-field seeking states has been devised and implemented, and its characteristics have been investigated both experimentally and theoretically. The trap is loaded with slow 15 ND 3 molecules in their ground state (para-ammonia) from a Stark decelerator. The trap's geometry offers optimal access as well as improved loading. We present measurements of the dependence of the trap's performance on the switching frequency, which exhibit a characteristic structure due to nonlinear resonance effects. The molecules are found to oscillate in the trap under the influence of the trapping forces, which were analyzed using 3D numerical simulations. On the basis of expansion measurements, molecules with a velocity and a position spread of 2.1 m/s and 0.4 mm, respectively, are still accepted by the trap. This corresponds to a temperature of 2.0 mK. From numerical simulations, we find the phase-space volume that can be confined by the trap (the acceptance) to be 50 mm 3 (m/s) 3 .

show abstract

Section: Numerical Simulationsmentioning

confidence: 99%

Section: Numerical Simulationsmentioning

confidence: 99%

A Linear AC Trap for Polar Molecules in Their Ground State

et al. 2007

View full text Add to dashboard Cite

show abstract

“…For 15 ND 3 the inversion splitting is 1430.3 MHz [8] and the dipole moment is taken to be the same as for 14 ND 3 , i.e. 1.48 D [22]. At even larger field strengths, the effect of mixing with higher rotational levels becomes more important and higher order terms have to be taken into account.…”

Section: The Various Trapping Configurationsmentioning

confidence: 99%

Versatile electrostatic trap

et al. 2006

View full text Add to dashboard Cite

A four electrode electrostatic trap geometry is demonstrated that can be used to combine a dipole, quadrupole and hexapole field. A cold packet of ¹⁵ ND₃ molecules is confined in both a purely quadrupolar and hexapolar trapping field and additionally, a dipole field is added to a hexapole field to create either a double-well or a donut-shaped trapping field. The profile of the ¹⁵ ND₃ packet in each of these four trapping potentials is measured, and the dependence of the well-separation and barrier height of the double-well and donut potential on the hexapole and dipole term are discussed

show abstract

“…where W inv is the inversion splitting, which is equal to 0.053 cm −1 for ND 3 , and µ is the dipole moment, which is equal to 1.5 Debye [34]. For small electric fields the Stark shift is quadratic, while for large electric fields (above 10 kV/cm) the Stark shift becomes linear with | E|.…”

Section: A Transverse Confinement Of Neutral Molecules (I) Theorymentioning

confidence: 99%

A synchrotron for neutral molecules

Heiner

Bethlem

Meijer

2009

Chemical Physics Letters

View full text Add to dashboard Cite

Here we report on a synchrotron for neutral molecules that consists of two hexapole focusers bent into a torus. By switching the voltages applied to the two half-rings, polar molecules can be confined in tight packets for up to a second as they revolve around the ring. In this article, the operation and trapping parameters of the molecular synchrotron are discussed. We plan to use a molecular synchrotron in the future as an arena for low-energy collision experiments.

show abstract

Submillimeter laser Stark spectroscopy of 14ND3

Cited by 17 publications

References 21 publications

A Linear AC Trap for Polar Molecules in Their Ground State

A Linear AC Trap for Polar Molecules in Their Ground State

Versatile electrostatic trap

A synchrotron for neutral molecules

Contact Info

Product

Resources

About