CERN - European Organization for Nuclear Research  

Minutes of the CLIC Meeting - 21 March 2003

Agenda: 
 Effect of target emitted ions on the focal spot of an intense electron beam and impact on drive beam profile monitors

CLIC manpower plan 2003-2008
Speakers:
 C. Vermare (CEA),  Thibaut Lefevre, Ian Wilson

C. Vermare (CEA) and Thibaut Lefevre presented their work on the 'Effect of target emitted ions on the focal spot of an intense electron beam and impact on drive beam profile monitors'

A limitation in the use of intercepting profile monitors for high intensity electron beams like those needed for the drive beams of CLIC and CTF3 are the Ions released from the heated target, which lead to further focusing of the beam with the risk of damaging the target itself or blowing up the beam. This adversely affects the beam size measurement.
Some experimental results obtained on induction linacs both in France and in the US together with simulations will be shown, indicating a very good agreement with experimental data. The result of simulations for the CTF3 drive beams will be discussed as well. The design of the CTF3 beam profile monitor and the chosen strategy for their safe use will be finally given.

Ian Wilson presented the CLIC manpower plan.

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Frank Tecker  - Last updated  31-03-2003