1. WFM electronics Alexandra Andersson

2. F. Peauger – CTF3 committee – 11/02/10  Wakefield Monitors implemented in two accelerating structures TD24 (tank version, without SiC loads (except for the WFM)) 2 WFM experiment in CLEX  Each WFM will study two different modes:  TM like mode at ~ 18 GHz (+ hybrid recombination)  TE like mode at ~ 24 GHz  RF Design finished (GdfidL + HFSS simulations)  Mechanical design under progress (CERN)  Connectors, Vacuum cables, 3dB/180° Hybrids ordered SiC load TM modes TE modes Waveguide bend Port signals for beam offset ∆ x=1mm 18 GHz 24 GHz TM (+ perfect hybrid) TE

3. F. Peauger – CTF3 committee – 11/02/10  Qualification of three firms for precise machining (2 prototypes)  Results of Firm n°1: 3 Fabrication of the accelerating structures Very low roughness of turned surfaces Ra = 0.009 to 0.022 (spec=0.025) Roughness of milled faces higher (factor of 10) but can be improved with monocristal cutting tool Tolerances within 3 µm (spec=2.5) Planarity of 1.7 – 3.2 µm (spec=2µm), can be improved by better stress relieve process  Results from Firms n°2 and 3 expected in few weeks  Schedule (target): - all the disks for the two structures machined:mid 2010 - structures ready for test with beam on TBTS:end 2010 ?  But challenging planning  Note: need maybe an additional BPM on TBTS, just before the structure (to be discussed)  Very promising results

4. Detection scheme Waveguide Waveguide to coax Power limiter Low Noise Amplifier Down mix with 18GHz (24->6, 22.5->4.5,...) Power splitter Magnitude detected with logarithmic diode detector BandPass around 6GHz for phase detection Compare to phase of the 12GHz RF. Use Local Oscillator of common derivation

5. Detection Scheme

6. LO generation

7. Noise Component Loss/Gain [dB]Noise FigureGain linear Noise, F (linear) Gain casc. (linear) Noise Casc. (linear) Noise Casc. dB/Hz Gain casc. dB damped waveguide-10.010.00.110.00.110.0 -10.0 vacuum cable-2.02.00.61.60.115.812.0-12.0 vacuum feedthrough-0.50.50.91.10.117.812.5-12.5 Waveguide -> sma transition0.0 1.0 0.117.912.5-12.5 Waveguide and flanges-3.73.70.42.30.042.016.2-16.2 Waveguide -> sma transition0.0 1.0 0.042.416.3-16.3 PIN diode limiter-2.52.50.61.80.075.418.8-18.8 Low Noise Amplifier30.02.51000.01.813.3134.021.311.2 Mixer-7.07.00.25.02.6134.321.34.2 Power Splitter-5.05.00.33.20.8135.221.3-0.8 dBm/Hz (-174dBm/Hz + Casc. Noise Figure)mW/HzmWdBmW -152.75.4E-161.1E-06-59.71.1E-09

8. FrequencyPhase LO 1 (crystal oscillator)16.384 MHzφ1φ1 LO 2 (crystal oscillator)48 MHzφ2φ2 LO 3 (crystal oscillator)75 MHzφ3φ3 Mixer 1, LO1xLO264.384 MHzφ1+φ2φ1+φ2 Mixer 2, LO2xLO3123 MHzφ2+φ3φ2+φ3 Mixer 3, Mix1xMix2187.384 MHzφ 1 +2φ 2 +φ 3 LO = Mix 3 x16 (divide-by-N PLLL)2998.144 MHzφ LO= 16(φ 1 +2φ 2 +φ 3 ) 2xLO (frequency doubler)5996.288 MHz2φ LO 6xLO (frequency tripler, doubler)17988.864 MHz6φ LO WFM signal23988.4 MHzφ WFM DownMix1 = WFM x (6xLO)5999.536 MHzφ WFM -6φ LO IQ1=DownMix1x(2xLO)3.248 MHzφ WFM -8φ LO RF signal11994.2 MHzφ RF DownMix2 = RF x (2xLO)5997.912 MHzφ RF -2φ LO IQ2=DownMix2x(2xLO)1.624 MHzφ RF -4φ LO Phase WFM-RF = IQ1-2IQ2φ WFM -2φ RF Frequencies and phases

9. Waveguide

10. 534mm 194mm

11. Waveguide