Author/Authors :
Eisenbarth، نويسنده , , U and Eike، نويسنده , , B and Grieser، نويسنده , , M and Grimm، نويسنده , , R and Lauer، نويسنده , , I and Lenisa، نويسنده , , P and Luger، نويسنده , , Martin and Mudrich، نويسنده , , Ulrike and Schنtz، نويسنده , , T and Schramm، نويسنده , , U and Schwalm، نويسنده , , M. Weidemüller، نويسنده , , M، نويسنده ,
Abstract :
We apply novel bunch forms for efficient laser cooling of fast stored ion beams at the Heidelberg Test Storage Ring. 9Be+ ions are longitudinally confined in barrier buckets providing free motion of the cooled ions inside the bucket (quasi-coasting beam). The implementation of laser cooling in barrier buckets is described, and longitudinal dynamics of laser cooling is compared to electron cooling. With laser cooling, longitudinal temperatures far below 1 K are reached, corresponding to a momentum spread of Δp/p<10−6. When the thermal energy becomes sufficiently small, significant modifications of the ion distribution due to space-charge effects are observed.
