Author/Authors :
Urbanus، نويسنده , , W.H. and Bongers، نويسنده , , W.A. and van Dijk، نويسنده , , G and van der Geer، نويسنده , , C.A.J and de Kruif، نويسنده , , R and Manintveld، نويسنده , , P. and Pluygers، نويسنده , , J and Poelman، نويسنده , , A.J and Schüller، نويسنده , , F.C and Smeets، نويسنده , , P.H.M and Sterk، نويسنده , , A.B and Verhoeven، نويسنده , , A.G.A. and Valentini، نويسنده , , M and van der Wiel، نويسنده , , M.J، نويسنده ,
Abstract :
In the Fusion-FEM electrostatic Free Electron Maser, an electron beam loss current of less than 0.2% is essential for long-pulse operation. At reduced beam current, 3 A instead of the nominal 12 A, we have demonstrated electron beam acceleration and transport through the undulator at current losses less than 0.02%. This paper summarizes the results of beam transport experiments and outlines the simple yet effective beam diagnostics system.
atus of the mm-wave cavity and low-power measurements are given. It is shown that cavity characteristics, such as losses, bandwidth, frequency-tuning and feedback coefficient, can be checked in situ via the output window, by injecting a low power test-signal into the mm-wave system and analyzing the reflected signal.
