Author :
Caspers, Fritz ; Jimenez, Jose Miguel ; Jones, Owain Rhodri ; Kroyer, Tom ; Vuitton, Christophe ; Hamerla, Timothy W. ; Jansson, Andreas ; Misek, Joel ; Pasquinelli, Ralph J. ; Seifrid, Peter ; Sun, Ding ; Tinsley, David
Abstract :
The LHC Schottky observation system is based on traveling wave type high sensitivity pickup structures operating at 4.8 GHz. The choice of the structure and operating frequency is driven by the demanding LHC impedance requirements, where very low impedance is required below 2 GHz, and good sensitivity at the selected band at 4.8 GHz. A sophisticated filtering and triple down-mixing signal processing chain has been designed and implemented in order to achieve the specified 100 dB instantaneous dynamic range without range switching. Detailed design aspects for the complete systems and test results without beam are presented and discussed.
Keywords :
Schottky effect; electric impedance; proton accelerators; signal processing; synchrotrons; LHC Schottky pick-up system; filtering; frequency 4.8 GHz; impedance requirements; traveling wave; triple down-mixing signal processing chain; Apertures; Bandwidth; Condition monitoring; Dynamic range; Frequency; Impedance; Instruments; Large Hadron Collider; Signal design; Signal processing;
