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The CERN/ISOLDE Resonance Ionization Laser Ion Source

Bruce Marsh (CERN)

11h GANIL room beta

a coffee will be served 15mn before

 

The CERN-ISOLDE Radioactive Ion Beam (RIB) Facility is at the forefront of fundamental and applied research related to the use of ion beams of artificially produced exotic isotopes.
Isotope purity - extracting a beam of ions with the desired combination of proton number (Z) and atomic mass (A) is often an essential requirement. This is achieved by coupling the element-selective process of multi-step laser resonance photo-ionization with mass-selective ion beam transmission using an electromagnetic dipole mass spectrometer.
The ISOLDE Resonance Ionization Laser Ion Source (RILIS) comprises an array of industrial, scientific and custom made lasers (Nd:YAG, Ti:Sapphire and dye lasers) and is capable of selectively ionizing more than 35 different elements with efficiencies often exceeding 10%. In recent years state-of-the-art laser technologies and equipment monitoring and control systems have been implemented. These have increased the performance, reliability and capabilities of the RILIS to the extent that it is used for more than 75% of the ISOLDE experimental program.  This equates to up to 3000 hours of ion beam production time annually.
In addition to its use as an efficient and selective ion source, the RILIS is itself a powerful spectroscopic tool for fundamental nuclear and atomic physics studies, and can in some cases provide isomer-pure ion beams.
Technical details of the laser system and recent highlights of the various developments and applications of the ISOLDE RILIS will be presented.

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