1
Antiprotons at FAIR
FLAIR
SIS 100 / 300
pbar productionCapture andaccumulation
deceleration
High EnergyStorage Ring forAntitprotons(HESR): 0.8–15 GeV
New low-energyfacility
CR
NESR
HESR
Antiproton IonCollider
2
FLAIR@ FAIR
• High brightness low energy beams– Storage rings with 300 keV (LSR)– electron cooling
• ε ~ 1 π mm mrad• Δp/p ~ 10–4
• Storage ring with internal targets for collision studies
• Slow and fast extraction • Ion traps
– HITRAP facility for HCI & pbar
• Several 100 times more antiprotons than now
• Especially interesting for strangeness physics using stopped antiprotons
• Operation after 2017 is the real problem
EXA08 – LEAP08, Vienna 09-18-2008
P. Kienle
Production of Antideuterons in Antiproton Rings P. Kienle, Hyp..Inter.. (2008)DOI 10.1007/s10751-009-0043-4
Proposal 1982 AIC @ GSI
EXA08 – LEAP08, Vienna 09-18-2008
P. Kienle
Principle of Antideuteron Breeding in a Double Storage Ring
Breeding Reaction is time inversed of pp pionic fusion pp -> dπ+
The total reaction cross section is large and well known: dσ/dΩ(0)= 3.2 mb with a maximum at Tp = 160MeV and 8,6% pionic fusion branch
Matching condition for accumulation anti-deuterons in ring 1
EXA08 – LEAP08, Vienna 09-18-2008
P. Kienle
AIC Double Ring of FAIR
Matching Condition: p2=p4 and p1=p3
ΔΩ(cm)/ΔΩ(lab)= (p1/pd*)²= 141
Enlargement of the cm solid angle
EXA08 – LEAP08, Vienna 09-18-2008
P. Kienle
Luminosity
ΔQ= 0.1, N2= 1010, ß1= 0.90, ß2=0.56, γ2= 1.13
U2 =45.125 m, rp= 1.54x10-16 cm, ß*~100 cm
N1= N2x0.93= 0.93x1010
L: 5.2x1028 cm-2s-1 (dσ/dΩ)ΔΩcm~ 0.42 mb
Antideuteron rate: ~23 s-1
can be enlarged by optimalisation of N2, N1 and ß* by a factor ~5
EXA08 – LEAP08, Vienna 09-18-2008
P. Kienle
Physics Case
• Anti deuteron mass and magnetic moment• Anti deuteron atoms• Anti deuteron isotope shift• Anti deuterium hyperfine structure• Matter- antimatter cross section comparison• Production of multi-strangeness in nuclei• Production of charm in nuclei• Breeding of anti-3He by anti-protons and -deuterons
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