Accession Number:

ADA455526

Title:

CW Atom Laser

Descriptive Note:

Final progress rept. 1 Jul 2002-30 Apr 2006

Corporate Author:

MICHIGAN UNIV ANN ARBOR

Personal Author(s):

Report Date:

2006-08-04

Pagination or Media Count:

10.0

Abstract:

A continuous-wave cw, phase- and amplitude-stable atom laser based on magnetic guiding, magnetic compression, and continuous distributed evaporative cooling has been pursued. The continuous operation of a cold atomic beam in a high-gradient up to 2.7kGcm magnetic guide of 1.7m length has been demonstrated. An imaging method has been developed that allows in-situ measurements of atom temperatures and fluxes. The atomic beam in the high-gradient portion of the guide has been found to have a transverse temperature of 420 micro-Kelvin, a longitudinal temperature of 1mK, an average velocity of order 1ms, and a flux of about 3x107 per second. Using a radio-frequency current coupled directly into the guide wires, relatively hot atoms have been continuously and selectively removed from the atomic beam. A Zeeman slower has been constructed that will enable atom fluxes exceeding 109 per second, as required for efficient evaporative atomic-beam cooling. In the project, the foundations have been laid to prepare a cw Bose-Einstein condensate and a coherent cw matter-wave beam in the guide. This matter-wave source will be ideal for atom-interferometric field- and motion sensors, which may become important in future sensing and navigation applications.

Subject Categories:

  • Electricity and Magnetism
  • Particle Accelerators
  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE