Deceleration and trapping of ammonia using time-varying electric fields

被引:206
作者
Bethlem, HL
Crompvoets, FMH
Jongma, RT
van de Meerakker, SYT
Meijer, G
机构
[1] EURATOM, FOM, Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands
[2] Univ Nijmegen, Dept Mol & Laser Phys, NL-6525 ED Nijmegen, Netherlands
来源
PHYSICAL REVIEW A | 2002年 / 65卷 / 05期
关键词
D O I
10.1103/PhysRevA.65.053416
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A polar molecule experiences a force in an inhomogeneous electric field. Using this force, neutral molecules can be decelerated and trapped. It is shown here that this can in principle be done without loss in phase-space density. Using a series of 64 pulsed inhomogeneous electric fields a supersonic beam of ammonia molecules ((NH3)-N-14, (ND3)-N-14, (ND3)-N-15) is decelerated. Subsequently, the decelerated molecules are loaded into an electrostatic quadrupole trap. Densities on the order of 10(7) molecules/cm(3) at a temperature of 25 mK are obtained for (ND3)-N-14 and (ND3)-N-15 separately and simultaneously. This corresponds to a phase-space density in the trap of 2x10(-13), 50 times less than the initial phase-space density in the beam.
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页数:20
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