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Antiprotons at FAIR

Antiprotons at FAIR. High Energy Storage Ring for Antitprotons (HESR): 0.8–15 GeV. SIS 100 / 300. HESR. pbar production Capture and accumulation. FLAIR. CR. New low-energy facility. NESR. Antiproton Ion Collider. deceleration. FLAIR@ FAIR. High brightness low energy beams

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Antiprotons at FAIR

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  1. Antiprotons at FAIR High Energy Storage Ring for Antitprotons (HESR): 0.8–15 GeV SIS 100 / 300 HESR pbarproduction Capture and accumulation FLAIR CR New low-energy facility NESR Antiproton Ion Collider deceleration

  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

  3. Productionof Antideuterons in Antiproton Rings P. Kienle, Hyp..Inter.. (2008)DOI 10.1007/s10751-009-0043-4 Proposal 1982 AIC @ GSI

  4. 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

  5. AIC Double Ring of FAIR Matching Condition: p2=p4 and p1=p3 ΔΩ(cm)/ΔΩ(lab)= (p1/pd*)²= 141 Enlargementofthe cm solid angle

  6. 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 canbeenlargedbyoptimalisationof N2, N1 and ß* by a factor ~5

  7. 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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