Paper |
Title |
Page |
MOPPD057 |
CERN PSB-to-PS Transfer Modifications for the 2 GeV Upgrade |
493 |
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- W. Bartmann, J. Borburgh, S.S. Gilardoni, B. Goddard, A. Newborough, S. Pittet, R. Steerenberg
CERN, Geneva, Switzerland
- C.H. Yu
IHEP, Beijing, People's Republic of China
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Within the frame of the CERN PS Booster (PSB) energy upgrade from 1.4 to 2 GeV, the PSB to PS transfer line will be adapted for pulse-to-pulse modulated operation. A modified lattice is presented including a re-design of the switching dipole between ISOLDE and PS and additional collimators to protect the PS injection septum. Optics solutions optimized for small emittance LHC beams as well as for the large emittance high-intensity beams are shown.
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TUPPC078 |
Proposal of an Inverse Logarithm Scaling Law for the Luminosity Evolution |
1353 |
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- M. Giovannozzi
CERN, Geneva, Switzerland
- C.H. Yu
IHEP, Beijing, People's Republic of China
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A scaling law for the time-dependence of the dynamic aperture, i.e., the region of phase space where stable motion occurs, was proposed in previous papers, about ten years ago. It was showed that dynamic aperture has a logarithmic dependence on time, which would be suggested by some fundamental theorems of the theory of dynamical systems. Such a scaling law was recently extended also to the intensity evolution in a storage ring. In this paper, inspired by these results, and inverse logarithm scaling law for the luminosity in a circular collider is proposed. The law is then tested against the data from the LHC physics runs and also with some examples from other machines. The results are presented and discussed in details.
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