Title :
Beam induced transient vacuum instability in H- beam
Author_Institution :
SNS, Oak Ridge Nat. Lab., TN, USA
Abstract :
When high current beam is transported through a vacuum channel, vacuum instability can develop due to desorption caused by ion/electron bombardment of the walls. In case of pulsed beam one can have situation when stability conditions are satisfied in average, while violated during the pulse. This effect can cause additional losses for H- beams due to stripping on the tail of the pulse. Expression for instability threshold is derived and estimations are done for the SNS MEBT beam parameters
Keywords :
ion accelerators; particle beam stability; storage rings; SNS; electron bombardment; instability threshold; ion bombardment; pulsed beam; stability conditions; vacuum channel; vacuum instability; Colliding beam accelerators; Electron beams; Energy loss; Ionization; Laser excitation; Nitrogen; Particle beams; Stability; Tail; Vacuum systems;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987168
