Feb 12 – 14, 2007
CERN
Europe/Zurich timezone

Laser pumping of ions in a cooler-buncher

Feb 12, 2007, 4:55 PM
20m
Council Chamber, 503/1-001 (CERN)

Council Chamber, 503/1-001

CERN

Speaker

Bradley Cheal (The University of Manchester)

Description

Collinear laser spectroscopy measurements of nuclear moments and mean-square charge radii at JYFL have benefited from the introduction of an ion beam cooler. The reduced energy spread of the emerging beam increases the spectral resolution while the smaller emittance allows a narrower waist of the laser-ion overlap, thus requiring less laser power. A lower background from the decreased continuous scattering of laser light is further improved by pulsing the release of the ions from the cooler. The installation of ISCOOL at ISOLDE will couple these advantages with the higher beam intensities offered. Axial confinement of the slowly traveling cooled ions at the end of the cooler provides an opportunity to excite transitions and redistribute the electronic level populations. This may be done using broad band lasers which can readily access a wide range of wavelengths. Manipulation of state population in such a way extends the number of transitions available for study by collinear techniques. Transitions may be chosen on the basis of strength, preferred spins or hyperfine structure and hindered less by the lower state population.

Primary author

Bradley Cheal (The University of Manchester)

Presentation materials