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Article overview
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First observations of beam losses due to bound-free pair production in a
heavy-ion collider | R. Bruce
; A. Drees
; W. Fischer
; S. Gilardoni
; J.M. Jowett
; S.R. Klein
; S. Tepikian
; | Date: |
15 Jun 2007 | Abstract: | We report the first observations of beam losses due to bound-free pair
production at the interaction point of a heavy-ion collider. This process is
expected to be a major luminosity limit for the Large Hadron Collider (LHC)
when it operates with 208Pb82+ ions because the localized energy deposition by
the lost ions may quench superconducting magnet coils. Measurements were
performed at the Relativistic Heavy Ion Collider (RHIC) during operation with
100 GeV/nucleon 63Cu29+ ions. At RHIC, the rate, energy and magnetic field are
low enough so that magnet quenching is not an issue. The hadronic showers
produced when the single-electron ions struck the RHIC beampipe were observed
using an array of photodiodes. The measurement confirms the order of magnitude
of the theoretical cross section previously calculated by others. | Source: | arXiv, arxiv.0706.2292 | Services: | Forum | Review | PDF | Favorites |
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