Beam Physics Seminar
An alternative layout of the main accelerator for the 800 GeV upgrade of the TESLA collider is based on weakly coupled
pairs of 9-cell superconducting cavities - the superstructure. The concept of the superstructure layout and results of the first
beam test in the TTF linac (finished Nov. 18, 2002) will be presented. A very good damping of parasitic modes in the
weakly coupled structures makes a new application of superstructures feasible for FEL linacs when the accelerated
current is in the range of 100 mA. Recent HOM damping tests on a copper model of two coupled modified CEBAF
cavities are encouraging. Further studies of this layout should answer a question, of the superstructure impact on the
performance of the FEL linacs and on the investment costs.
Talk Slides:
PDF
(Coffee before the seminar starting 9:30 AM)