CERN - European Organization for Nuclear Research

Minutes of the CLIC Meeting - 20 October 2006


Agenda:
Kicker Systems for CTF3 & CLIC
Speaker:
Mike Barnes / AB-BT

Abstract

The new CLIC test facility, CTF3, is an important step in proving the technical feasibility of the CLIC project. Two kickers are required for CTF3: an extraction kicker for the combiner ring and a “tail-clipper” in the transfer line to CLEX. The tail-clipper requirements are extremely challenging, mainly because of the short (5 ns) field rise-time.
An existing ferrite cored extraction kicker, driven by a thyratron switched PFN, is installed in the CTF3 combiner ring: however this kicker presents relatively high beam impedance.  In the framework of the CIEMAT contributions to CTF3 strip-line deflector plates have been designed to replace the ferrite cored magnet. The existing thyratron can be used to drive the CTF3 CR extraction strip-lines; however for CLIC ~10kV rectangular pulses, with up to 10MHz burst-rate, and 70ns rise and fall times are required.  Hence, for CLIC, a solid-state switch capable of opening and closing is required.
This presentation briefly reviews the main requirements for the CTF3 & CLIC kicker systems and summarizes the progress to date. The two state-of-the–art solid-state switching topologies, suitable for the CLIC pulsed power supply, are briefly reviewed and examples of existing solid-state pulse generators are given. The advantages and disadvantages of the two topologies are highlighted and the main areas where further R&D is required is discussed.
copy of Mike's transparencies (pdf format)

Back to the CLIC meeting Home page

Frank Tecker  - Last updated  03-11-2006