Doppler velocimetry of cryogenic ion plasmas

Author

Mitchell, Travis B. ; Bollinger, John J. ; Itano, Wayne M. ; Kriesel, Jason M. ; Dubin, Daniel H E

Author_Institution

Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA

Volume

30

Issue

1

fYear

2002

fDate

2/1/2002 12:00:00 AM

Firstpage

16

Lastpage

17

Abstract

We describe a technique and present results for imaging wakes and modes excited in a laser-cooled plasma of ⁹Be⁺ ions in a cylindrical Penning trap. Wakes are created by an off-axis laser "push" beam, while individual modes are excited by sinusoidally time-varying potentials applied to the trap endcaps. Variations in ion velocities are imaged by changes in the ion fluorescence due to Doppler shifts. A comparison between theory and experiment shows good agreement

Keywords

Doppler effect; cryogenics; fluorescence; particle traps; plasma diagnostics; plasma instability; velocity measurement; wakes; ⁹Be⁺ ions; Be; Doppler shifts; Doppler velocimetry; cryogenic ion plasmas; cylindrical Penning trap; fluorescence spectroscopy; individual modes excited; ion fluorescence; ion velocities; laser cooling; mode excitation; off-axis laser push beam; plasma waves; sinusoidally time-varying potentials; trap endcaps; wake creation; wake imaging; Cryogenics; Fluorescence; Laser beams; Laser modes; Laser theory; Plasma confinement; Plasma density; Plasma measurements; Plasma temperature; Plasma waves;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2002.1003901

Filename

1003901