Introduction
The Manne Siegbahn Laboratory is a research facility at
Stockholm University.
The laboratory is performing research and development in accelerator physics. The main experimental equipment
at the laboratory has for many years been the
CRYRING accelerator facility. CRYRING was used for
experiments in, mainly, atomic and molecular physics from 1992 to the end of 2009.
It will now be moved to Darmstadt in Germany,
where it will be used for deceleration of antiprotons and heavy
ions at the FLAIR facility at
FAIR. The laboratory is also building a small, double
electrostatic storage ring
DESIREE.
CRYRING
The CRYRING
facility
consists of several ion sources, including an ECR cource on a 300 kV
platform and an EBIS, an RFQ linear accelerator and a 1.44 Tm
synchrotron
and storage ring with electron cooling. Experiments were performed with
beams at low energies directly from the ion sources or at higher
energies
in the ring.
The scientific programme was concentrated to atomic and molecular
physics,
either of fundamental nature or with applications in areas like
astrophysics,
astrochemistry, atmospheric physics and chemistry or combustion. The
experimental activities also included accelerator physics, presicion
mass
measurements and a small amount of applied physics.
Examples of specific fields of research are
- Collisions between highly charged ions and fullerenes
- Interactions between highly charged ions and surfaces
- Atomic mass measurements using highly charged ions in a Penning trap
- Lifetime measurements of excited atomic states using laser
spectroscopy on ions stored in the ring
- Studies of radiative and dielectronic recombination between stored
highly charged ions and electrons in the electron cooler
- Cross sections and branching ratios for dissociative recombination of
molecular ions in the electron cooler
- Collisions between fast ions and atoms in the CRYRING gas-jet target
- Studies of ordered beams in the ring
More detailed information about the experiments can be found at the
homepages of
the user groups.
DESIREE
DESIREE
is a double electrostatic storage ring designed for experiments
with merged beams of positive and negative ions, such as studies of mutual
neutralization between two singly charged ions. It can also be used for
single-beam experiments like measurements of atomic lifetimes or investigations
of the physical properties of biomolecules.
Other projects
The laboratory is involved in several external activities, such as
participation in the design study for EURISOL, the future European ISOL facility for
radioactive beams; EBIS development together with
JINR, Dubna;
the REX-ISOLDE project where the laboratory has developed
and built an EBIS ion source; collaboration with the
Karolinska Institute on development of equipment for cancer
therapy, etc.