The 4.8 GHz LHC Schottky pick-up system

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

Author_Institution

CERN, Geneva

fYear

2007

fDate

25-29 June 2007

Firstpage

4174

Lastpage

4176

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4439977

Filename

4439977