Title :
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
fDate :
2/1/2002 12:00:00 AM
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;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2002.1003901
