Operational Challenges of HERA's Superconducting Proton Machine [article]

B Holzer, M Bieler
Compared to its luminosity energy of 920 GeV HERA's superconducting proton machine has a rather low injection energy of 40 GeV. During the cycling procedure of the superconducting magnets eddy currents are induced in the superconducting cables. These persistent currents decay over hours during injection and ramp. The magnetic field components driven by these persistent currents are detrimental to the beam and therefore have to be measured and compensated. In this paper the methods are described
more » ... thods are described to adjust the beam energy, the betatron tunes and the chromaticity both during injection and on the ramp.
doi:10.5170/cern-2001-002.179 fatcat:ywj7ancdjngsnaraoye3ochu4m