PS Transverse Feedback Pick-up Amplifier

Overview

The amplifier electronics shape the electrode signals to get a flat response from about 20kHz to 40MHz. The electrode signals are combined in an active hybrid circuit to yield a horizontal difference (X), a vertical difference (Y) and an overall sum signal Σ. Variable gain amplifiers and passive attenuators adjust the amplitude of the sum to about 1Vp and the displacement sensitivity to 40mm.
A real-time program running on DSC dcpspuct in CB sends the appropriate gain values to the amplifiers just prior to beam injection. This is done via a serial data link, the same as is used for all other PUs in the ring. Gain settings can be adjusted from an application program accessible from the 'Tests' menu of the CPS Console Manager. (Look for entry 'TFB PU Ctrl'.)

Amplifier block diagram

Click on the highlighted portions of the block diagram for additional details.

• Installation cabling diagram SS02
• Installation cabling diagram SS98
• Measured characteristics
• Schematic diagrams (EDMS database, entry EDA-00284)
• A. Barreira-Sevillano, J.M. Belleman, "The VMOD-TRX: A device for communicating with remote instrumentation", PS/BD Note 96-02(Tech)
• J.M. Belleman, "The design of new pick-up head electronics for the PS transverse feedback system", AB-Note-2003-??? (BDI) (To be published)
• The hardware control protocol.
• Power supply (EDA-00412)
• Transparencies showed on the occasion of the October 16, 2003 meeting.