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Update on Drive Beam BPM Development

Update on Drive Beam BPM Development. Alfonso Benot Morell , CERN BE-BI. Contents. Status 50 Ω Terminated Stripline BPM 2.1 Initial Design 2.2 Thick Electrodes 2.3 Wider gap 2.4 Alternatives Conclusions. Contents. Status 50 Ω Terminated Stripline BPM 2.1 Initial Design

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Update on Drive Beam BPM Development

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  1. Updateon Drive Beam BPM Development Alfonso BenotMorell, CERN BE-BI CLIC Module Working Group Meeting, 24 April 2013

  2. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  3. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  4. 1- Status • Stripline BPM prototypeterminated in short-circuit (withSiCdamper) installed in TBL (CLEX) • In theproximity of thelast PETS • Influence of ~130 MW 12 GHz RF non-local signal? • Low-Frequencyoperatingreadoutelectronics (<50 MHz) • Mayneedexternal 12 GHz notch-filteringsolutions • A 50Ω-terminatedstripline BPM prototype has beendesigned (withSiCdamper) • Initialdesignimproves 12 GHz filteringeffect • SiCdampensHOMsbutalso HF components • Manufacturabilityissues • Electrode-Feedthroughtransition • SiC Ring Thickness CLIC Module Working Group, 24 April 2013

  5. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives CLIC Module Working Group Meeting, 24 April 2013

  6. 2-50Ω-TerminatedStripline BPM Prototype • Intended use of 3rd null in frequency response as 12 GHz notchfilter (>40 dB fallneeded) • L_elec = 37.5 mm (nominal) CLIC Module Working Group, 24 April 2013

  7. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  8. 2.1 – InitialDesign CLIC Module Working Group, 24 April 2013

  9. 2.1 – InitialDesign CLIC Module Working Group, 24 April 2013

  10. 2.1 – InitialDesign CLIC Module Working Group, 24 April 2013

  11. 2.1 – InitialDesign • Manufacturabilityissues • AdditionalSiC ring +1.80mm  4.25mm total SiCthickness • TransitionElectrode-Feedthrough  Small spheresleftonbeamside of pipe  3rd lobedegraded CLIC Module Working Group, 24 April 2013

  12. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wide gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  13. 2.2 – Thickelectrodes CLIC Module Working Group, 24 April 2013

  14. 2.2 – Thickelectrodes 1.9 mm thickness CLIC Module Working Group, 24 April 2013

  15. 2.2 – Thickelectrodes 1.5 mm thickness CLIC Module Working Group, 24 April 2013

  16. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  17. 2.3 – Wide Gap • 1.5mm thickelectrodes + 7mm gap CLIC Module Working Group, 24 April 2013

  18. 2.3 – Wide Gap • 1.5mm thickelectrodes + 7mm gap CLIC Module Working Group, 24 April 2013

  19. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  20. 2.4 – Alternatives • Latestproposal CLIC Module Working Group, 24 April 2013

  21. 2.4 – Alternatives • Latestproposal CLIC Module Working Group, 24 April 2013

  22. 2.4 – Alternatives • Changeelectrodeshape • Circular end rectangular (blendededges) • Tapering • External 12 GHz filtering CLIC Module Working Group, 24 April 2013

  23. Contents • Status • 50ΩTerminatedStripline BPM 2.1 InitialDesign 2.2 ThickElectrodes 2.3 Wider gap 2.4 Alternatives • Conclusions CLIC Module Working Group Meeting, 24 April 2013

  24. 3 - Conclusions • Frequency response  ExtremelysensitivetoSiC • Parameterstovary: • L_gap • L_sic • L_elec ? • Searchformanufacturable (L_gap,L_sic) tohave >40 dB fallafter 3rd lobe (12 GHz) • Furthersimulationneeded CLIC Module Working Group, 24 April 2013

  25. Thankyou CLIC Module Working Group, 24 April 2013

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