Report/Contribution to a conference proceedings

PUBDB-2016-02946

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A Method for Reduction of the Reflected Power and Overvoltage in RF Systems

Flottmann, K. (Corresponding author)DESY* ; Paramonov, V. V.

2000
DESY Hamburg

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Please use a persistent id in citations: doi:10.3204/PUBDB-2016-02946

Report No.: DESY-M-00-04ZB

Abstract: The basic elements of the TESLA linear collider with integrated X-ray FEL are superconducting accelerating cavities. The standard TESLA rf system is designed for a long (1300μs) rf pulse with a flat-top of 800μs and has several elements for the rf power distribution and protectionagainst reflected rf power. Together with the superconducting cavities, normal conducting (NC) cavities are used in TESLA for different purposes, for example as a rf gun. As a rule, one NC cavity uses the total rf power from one klystron (5MWor 10 MW). During the short transient period (the filling time for the L-band NC cavity is near 3μs) the reflected rf power and overvoltage in the waveguide (due to the interference of the forward and backward waves) exceeds the safety limit for the L-band waveguide operation (without SF6 filling). With a special shape of the start up of the rf pulse it is possible to reduce the reflected power several times and limit the overvoltage to a safe level. The increasing of the total pulse length is in the order of two filling times (6μs) and hence negligible in comparison with the total pulse length of 800μs. Different shapes of the beginning of the rf pulse are both considered to reduce the reflected power and to restrict the overvoltage. Results of experiments are presented.

Keyword(s): talk: Vienna 2000/06/26 ; electron positron: linear collider ; linear collider: proposed ; RF system: power supply ; RF system: pulsed ; RF system: stability ; safety ; DESY TESLA Linac

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Contributing Institute(s):

1. M-Bereich (M(-2012))

Research Program(s):

1. No facility / HGF program None (POF1-890) (POF1-890)

Experiment(s):

1. No specific instrument

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Proceedings/Report Decking, W. (Corresponding author)DESY*
Contributions to the 7th European Particle Accelerator Conference EPAC 2000
2000The 7th European Particle Accelerator Conference EPAC 2000, EPAC 2000, ViennaVienna, Austria, 26 Jun 2000 - 30 Jun 20002000-06-262000-06-30 Hamburg : DESY (2000)2000     Fulltext BibTeX | EndNote: XML, Text | RIS

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