Air break through into a long vacuum chamber

The velocity of the air propagation in a long vacuum chamber under break-through conditions is estimated on the basis of carried out investigations. The character of pressure changes in various chamber cross sections is also determined. In the channels of proton beam extraction from accelerating and storage complex vaccuum chamber has a partition with minimum thickness and bearing atmospheric pressure. In case of partition failure or break of some other chamber section there is a risk of the accelerator vacuum system filling with atmospheric air. 5 refs.; 7 figs.; 2 tabs