Generation of CW cold CHCN molecular beam by a bent electostatic quadrupole guiding: Monte-Carlo study

Abstract

A new kind of continuous-wave (CW) cold molecular beam, methyl cyanide (CH₃CN) beam, is generated by a bent electrostatic quadrupole guiding. The Stark shift of rotational energy levels of CH₃CN molecule and its population distribution are calculated, and the dynamic processes of electrostatic guiding and energy filtering of CH₃CN molecules from a gas source with room temperature (300 K) are simulated by Monte Carlo Method. The study showed that the longitudinal and transversal temperatures of output cold CH₃CN beam could be about ∼ 2 K and ∼ 420 mK, and the corresponding guiding efficiency was about 10^-5 as the guiding voltage was 3 kV. Furthermore, the temperature of the guided molecules and its guiding efficiency can be controlled by adjusting the guiding voltages applied on electrodes.

References

1. Hudson J J Sauer B E Tarbutt M R Hinds E A Phys.Rev. Lett. 2002 89(2)023003. doi: 10.1103/PhysRevLett.89.023003
2. DeMille D Bay F Bickman S Kawall D Krause D Maxwell S E Hunter L R Phys. Rev. A 2000 61(5)052507. doi: 10.1103/PhysRevA.61.052507
3. Balakrishnan N Dalgarno A Chem. Phys. Lett. 2001 341652. doi: 10.1016/S0009‐2614(01)00515‐2
4. Burnett K Julienne P S Lett P D Tiesinga E Williams C J Nature 2002 416225. doi: 10.1038/416225a
5. Bodo E Gianturco F A Dalgarno A J. Chem. Phys. 2002 116(21)9222. doi: 10.1063/1.1472515
6. Brezger B Hackermüller L Uttenthaler S Petschinka J Arndt M Zeilinger A Phys. Rev. Lett. 2002 88(10)100404. doi: 10.1103/PhysRevLett.88.100404
7. DeMille D Phys. Rev. Lett. 2002 88(6)067901. doi: 10.1103/PhysRevLett.88.067901
8. André A DeMille D Doyle J M Lukin M D Maxwell S E Rabl P Schoelkopf R J Zoller P Nature Physics 2006 2(9)636. doi: 10.1038/nphys386
9. Gupa M Herschbach D J. Phys. Chem. A 2001 105(9)1626. doi: 10.1021/jp002640u
10. Bethlem H L Berden G Meijer G Phys. Rev. Lett. 1999 83(8)1558. doi: 10.1103/PhysRevLett.83.1558
11. Tarbutt M R Bethlem H L Hudson J J Ryabov V L Ryzhov V A Sauer B E Meijer G Hinds E A Phys. Rev. Lett. 2004 92(17)173002. doi: 10.1103/PhysRevLett.92.173002
12. Bochinski J R Hudson Eric R Lewandowski H J Meijer G Ye Jun Phys. Rev. Lett. 2003 91(24)243001. doi: 10.1103/PhysRevLett.91.243001
13. Rangwala S A Junglen T Rieger T Pinkse P W H Rempe G Phys. Rev. A 2003 67(4)0434061. doi: 10.1103/PhysRevA.67.043406
14. Rieger T Junglen T Rangwala S A Rempe G Pinkse P W H Phys. Rev. A 2006 73(6)061402. doi: 10.1103/PhysRevA.73.061402
15. Elioff M S Valentini J J Chandler D W Science 2003 3021940. doi: 10.1126/science.1090679
16. Egorov Dima Lahaye Thierry Schollkopf Wieland Friedrich Bretislav Doyle John M Phys. Rev. A 2002 66(4)043401. doi: 10.1103/PhysRevA.66.043401
17. Maxwell S E Barhms N deCarvalho R Glenn D R Helton J S Nguyen S V Patterson D Petricka J DeMille D Doyle J M Phys. Rev. Lett. 2005 95(17)173201. doi: 10.1103/PhysRevLett.95.173201
18. Fulton R Bishop A I Baker P F Phys. Rev. Lett. 2004 93(24)243004. doi: 10.1103/PhysRevLett.93.243004
19. Simeckova M Urban S Fuchs U Lewen F Winnewisser G Morino I Yamada K M T J.Mol. Spectros. 2004 226123. doi: 10.1016/j.jms.2004.03.013
20. Junglen T Guiding and Trapping of Cold Dipolar Molecules, doctoral thesis 2005 17and private discussionwith Pinkse (from Rempe's group, Max-Plank Institute of Germany). doi: null
21. Gordy W Cook Robert L Microwave Molecular SpectraNew YorkWiley-Interscience 1984 54. doi: null