SNS Klystron Output DistortionSNS Klystron Output...
Transcript of SNS Klystron Output DistortionSNS Klystron Output...
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SNS Klystron Output DistortionSNS Klystron Output Distortion
THP099
M. McCarthy, M. Crofford, S. Kim
Managed by UT-Battellefor the Department of Energy
10-2-08
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Ci l t
SNS SCL RF ArchitectureCirculator
Water
Directional Coupler
Load
To Cavity
Klystrons
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Initial Klystron Fwd and Cavity Fwd Waveforms
Power Measured ~ 10us from end of
Open Loop
10us from end of pulse
cavity filling
Closed Loop Note different slopes on p
maintaining cavity field
peither side of the circulator
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Waveguide Circulator and Modified Directional Coupler
FWDRFL
Phase
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PhaseVariable attenuator
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RF Pulse Spectrum: Normal & Parabolic
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23b Cavity input full power normal bias
23b Cavity input full power parabolic shape
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TCU bias adjustment using slope matching programslope matching program
Klystron Output
Klystron Output and Cavity Input after circulator bias coil current adjustment
Cavity Input
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Cavity Input