Efficiency of vacuum cleaning by an electron beam in the prototype of electron-cooling device

A vacuum chamber of the electron-cooling device prototype was effectively cleaned by an electron beam. The outgassing rate of the vacuum chamber was decreased to values of order 10−15 mbar l/s cm2, and the coefficient of electron-induced desorption was lower than 10−5 molecule/electron. In the absence of vacuum pumps a vacuum better than 10−10 mbar was reached at a stationary current up to 2 A.