Abstract

The maximum achieved intensity at the IHEP 70 GeV proton synchrotron with a 100 MeV linac injection does not exceed 5.6 . 10 S protons per pulse. The intensity is limited by low energy space charge effects. In order to increase the beam intensity a new injection system has been constructed and some systems of the main accelerator (RF system, vacuum system, magnet power supply) have been improved according to new requirements. A fast-cycling proton synchrotron-booster with a maximum energy of 1.5 GeV is now used as a new injector.

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