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Conditioning in RF structures

Conditioning in RF structures. A.D., J.G.N. 28-02-2014. Conditioning history of two structures at KEK and CERN. CERN TD26R05CC conditioning history plot . TD26R05 CC conditioned at CERN. automatic conditioning ON. 7e-05 . 2e-05.

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Conditioning in RF structures

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  1. Conditioning in RF structures A.D., J.G.N. 28-02-2014

  2. Conditioning history of two structures at KEK and CERN • CERN TD26R05CC conditioning history plot

  3. TD26R05 CC conditioned at CERN automatic conditioning ON 7e-05 2e-05 equivalent conditioning curve with constant pulse length of 250 ns since the beginning It would take longer time to reach the same gradient with smaller BDR (as expected) • equivalent conditioning curve with: • constant pulse length of 250 ns since the beginning • constant BDR of 1e-6 bpp/m

  4. Conditioning history of two structures at KEK and CERN • TD24R05#4 at KEK

  5. TD24R05#4 conditioned at KEK - history Conditioning BDR measurements

  6. TD24R05 conditioned at KEK 1.4e-06 2.3e-06 5.5e-06 4.8e-06 9.2e-07 2.7e-06 Conditioning curve of TD24R05 at KEK • equivalent conditioning curve with: • constant pulse length of 250 ns since the beginning • constant BDR of 1e-6 bpp/m

  7. BDR during conditioning Moving average with a window of 10 MPulses

  8. Comparison of conditining curves KEK, TD24R05#4 CERN TD26R05CC gradient normalized gradient

  9. Comparison of conditining curves KEK, TD24R05#4 CERN TD26R05CC gradient normalized gradient

  10. Comparison of E0 vs #BD KEK, TD24R05#4 CERN TD26R05CC

  11. Normalized Gradient Overlapped

  12. Normalized Gradient

  13. Normalized Gradient VS #RF Periods (tpulsex12GHz)

  14. Normalized Gradient LOG-LOG scale

  15. Normalized Gradient Slope = 0.287 +/- 0.001 (Slope error corresponds to least-square fit method) LOG-LOG scale + Linear FIT Slope = 0.2579 +/- 0.0006

  16. Normalized BDR LOG-LOG scale

  17. Normalized BDR LOG-LOG scale + Linear FIT (Slope error corresponds to least-square fit method) Slope = -8.35 +/- 0.02 Slope = -7.74 +/- 0.02

  18. Fit of conditioning curves KEK, TD24R05#4 CERN TD26R05CC E0*=a Nb E0*=a log(N) + b

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