FLAIR A Facility for Low-Energy Antiproton and Ion Research. Carsten P. Welsch on behalf of the FLAIR collaboration. Outline. Why cooled low-energy antiprotons ? Present situation: AD @ CERN The future: FLAIR General scheme The low-energy storage ring (LSR)
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Carsten P. Welsch
on behalf of the FLAIR collaboration
How do matter and
Is the most general symmetry valid, CPT ?
Is gravitation equal for matter and antimatter?
What is the structure of antiprotonic
atoms and ions?
Do we understand correlation between
the electrons in simplest systems?
Structure + Fundamental interactions
Precision spectroscopy of H(1s-2s)
Hyperfine spectroscopy of H
p/p mass & H/H gravity measurements
g-factor of p
Structure & Dynamics
Hyperfine spectroscopy of pHe+
Precision spectroscopy of pHe+
Life-time of metastable states in pHe+
Formation of pHe+: n,l distributions
Formation of antihydrogen
p + e+: radiative recombination, stimulated by laser
three-body recombination, in strong magnetic fields
p + PS: kinematical e+ capture in the presence of a laser field
p collisions with atoms and molecules
total single and multiple ionization cross sections
fully differential cross sections for single, double, multiple ionization
H + H collisions
H + atom, molecule collisions
Nuclear and Particle Physics with Antiprotons
5 … 2 … 0.5 … 0.3
1 fs … 0.3 fs … 0.1 fs … 30 as
E[keV]Dynamics: He + pbars
26 GeV/c p
3.57 GeV/c p
E (1s) = - 0.000 000 013 6 GeVChallenges
Antiprotons are created at
high energies. (GeV)
Deceleration& Coolingrequired !
~ 10.000 pbars/shot
~ 2.000.000 pbars/shot
Still: large DE/E, ex,y
Storage Ring for
(HESR): 0.8–15 GeV
SIS 100 / 300
St. Petersburg, Troitsk, Moskva)
MPQ, Giessen, MPI-K, FJZ, Mainz,
Spokesman: E. Widmann, SMI, Vienna
30 MeV - 300 keV
300 keV - 20 keV
keV - ... eV
FLAIR will be the world's unique facility combining low energy antiprotons and exotic ions. It will provide forefront research opportunities on challenging physics in the 2010's.
The committee evaluates its extraordinary significance and recommends it to become an integral part of the FAIR facilities.
Pbar & Ions400 – 30 MeV
30 - 0.3 MeV
300 - 20 keV
pbar and ions
Stopped & extracted @ 5 keV
Spokesman: R. SchuchFLAIR Schematic Layout
Not covered in this talk.
with “cave AP”
part of CDR
Injection at 300 keV, cooling at 3 MeV,
acceleration to 30 MeV, deceleration to 300 keV
= 15 msec
Umfang = 30 m
FLAIR TRUSR: At a Glance
In-ring Reaction Microscope
Diagnostics@ 4 KQUASAR Group @ MPI-K / KIP
- E~ 1 meV
16.-19.9.2008, Vienna, Austria