| Autor: |
W.A. Bongers, M. Valentini, R de Kruif, M.J. van der Wiel, A.B. Sterk, A.G.A. Verhoeven, P. Manintveld, G. van Dijk, A.J. Poelman, C.A.J. van der Geer, F.C. Schüller, P.H.M. Smeets, J. Pluygers, W.H. Urbanus |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment, 407, 327-331 |
| Popis: |
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. The status 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. (C) 1998 Elsevier Science B.V. All rights reserved. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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