High bandwidth pickup design for bunch arrival-time monitors for free-electron laser

In this paper, we present the design and realization of high bandwidth pickup electrodes with a cutoff frequency above 40 GHz. The proposed cone-shaped pickups are part of a bunch arrival-time monitor designed for high (>500pC ) and low (20 pC) bunch charge operation mode providing for a time res...

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Bibliographic Details
Published in:Physical review special topics. PRST-AB. Accelerators and beams 2012-11, Vol.15 (11), p.112803, Article 112803
Main Authors: Angelovski, Aleksandar, Kuhl, Alexander, Hansli, Matthias, Penirschke, Andreas, Schnepp, Sascha M., Bousonville, Michael, Schlarb, Holger, Bock, Marie Kristin, Weiland, Thomas, Jakoby, Rolf
Format: Article
Language:English
Subjects:
Free electron lasers
Mathematical models
Tolerances
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Summary:In this paper, we present the design and realization of high bandwidth pickup electrodes with a cutoff frequency above 40 GHz. The proposed cone-shaped pickups are part of a bunch arrival-time monitor designed for high (>500pC ) and low (20 pC) bunch charge operation mode providing for a time resolution of less than 10 fs for both operation modes. The proposed design has a fast voltage response, low ringing, and a resonance-free spectrum. For assessing the influence of manufacturing tolerances on the performance of the pickups, an extensive tolerance study has been performed via numerical simulations. A nonhermetic model of the pickups was built for measurement and validation purposes. The measurement and simulation results are in good agreement and demonstrate the capability of the proposed pickup system to meet the given specifications.
ISSN:1098-4402
1098-4402
2469-9888
DOI:10.1103/PhysRevSTAB.15.112803