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CO2 laser ion source: Comparison between mode-locked and free-running laser beams

Published online by Cambridge University Press:  14 May 2002

N. LISI ,
C. MEYER  and
R. SCRIVENS
N. LISI
Affiliation:
CERN PS Division, CH-1211 Geneve 23, Switzerland Present address: ENEA Casaccia, PO Box 2400, 00100 Roma, Italy
C. MEYER
Affiliation:
CERN PS Division, CH-1211 Geneve 23, Switzerland
R. SCRIVENS
Affiliation:
CERN PS Division, CH-1211 Geneve 23, Switzerland
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Abstract

The production of highly charged ions in a CO2 laser-generated plasma is compared for different laser pulse-time structures. The work was performed at the CERN Laser Ion Source, which has the aim of developing a high current, high charge-state ion source for the Large Hadron Collider (LHC). When an intense laser pulse is focused onto a high-Z metal target, the ions expanding in the plasma plume are suitable for extraction from the plasma and matching into a synchrotron. For the first time, a comparison is made between free-running pulses with randomly fluctuating intensity, and mode-locked pulse trains with a reproducible structure and the same energy. Despite the lower power density with respect to the mode-locked pulse train, the free-running pulse provides higher charge states and higher yield.

Keywords

Heavy ionsIon sourcesLaserPlasma
Type
Research Article
Information
Laser and Particle Beams , Volume 19 , Issue 4 , October 2001 , pp. 647 - 655
Copyright
© 2001 Cambridge University Press

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