Beam tube damping estimations for SPL cavity cont’d W. Weingarten 3 May 20101SPL Cavity WG Meeting.

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Presentation transcript:

Beam tube damping estimations for SPL cavity cont’d W. Weingarten 3 May 20101SPL Cavity WG Meeting

HOM damping with normalconducting beam tube 3 May 2010SPL cavity working group meeting2

HOM damping with two 50 Ω antennas in beam tube Ø i = 3.6 cm 3 May 2010SPL cavity working group meeting3 positions of HOM coupler port centroids at 3 cm away from transition small beam tube to taper

2nd preliminary conclusion  In the range 1300 – 1500 MHz, damping HOMs is difficult by either  dissipation in beam tube or  antenna placed in beam tube  Trimmed antenna HOM absorbers seem to be needed  More comprehensive studies required 3 May 2010SPL Cavity WG Meeting4