1. Status of ATF2 Cavity BPM Project Sep 29, 2005 Project Scope: Instrument both couplers ATF2 cavity BPM’s (35) Produce prototype for December cavity test Production complete 31.03.06 Want full integration into ATF2 control system.

2. Table 1: System Specifications: BPM dipole frequency (MHz)6430 Kick factor (J/C^2/mm^2)1.3e10 Decay time (ns)350 Required resolution (single bunch – nm)100 Dynamic range (um)1000 Nominal charge (ppb)1e10

3. Cavity BPM electronics system

4. ATF2 Cavity BPM receiver board schematic

5. Silk screen – ATF2 cavity BPM electronics September 28, 2005

6. HOM Board 100 channel production finished Sept 20

8. Hardware Status – Downmix Chassis Prototype submitted for printing Sept 29 (CA). Parts on hand – –Except limiters (4 to 6 weeks) and power meter –Testing begins Oct 12 Tests of HOM board (similar) –gain 33dB –Linearity second side band 70dB down at top of range of -24dBm –Noise figure 5dB –Channel to channel coupling -60dB Board designed for machine assembly

10. Table 2: Key sub-components of the ATF2 BPM system. ComponentResponsible for production Number HybridKEK2 for each cavity Front end heterodyne receiver SLAC, ILC Department2 channels / cavity Digitizer & crateSLAC and Struck I. Systeme 3 cavities per 8 channel VME digitizer module; 9 modules per crate (one crate required) LO Source and amplifier SLAC, ILC Department1 Calibration sourceSLAC (purchased)1