Seminars

Radioactive ion beams at TRIUMF using the resonance ionization laser ion source

by Dr Jens Lassen (TRIUMF)

Asia/Tokyo
Description

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Joint Seminar of the 31st Nuclear Spectroscopy Lab. & Quantum Beam Application Research (B03)

第 31 回 核分光研 & 新学術領域研究「量子ビーム応用」合同セミナー

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Lecturer: Jens Lassen

Title: Radioactive ion beams at TRIUMF using the resonance ionization laser ion source

Language: English

Date: September 2 (Wed.), 2020, 13:30-

Place: via Zoom  (the URL was distributed in the mailing list)

Abstract: 

TRIUMF Canada’s particle accelerator centre - formerly known as Canada’s National Laboratory for Nuclear and Particle Physics currently operates a radioactive ion beam (RIB) facility called ISAC. This isotope separator and accelerator facility uses up to 100uA of 480MeV protons as a driver on thick targets to produce radioactive isotopes. These isotopes are ionized, extracted, mass separated and delivered directly to experiments as low energy beams. Alternatively, the RIB can be post accelerated by conventional accelerators to medium energies (<1.8 MeV/u), or by a set of superconducting linacs to high energy (<16.5 MeV/u).
There is a current facility expansion under way, that aims at turning the RIB program into a true multi user facility, to allow better utilization of the detectors and facilities installed at ISAC. This upgrade will add a photofission target station, and later a second proton target station, to eventually allow the delivery of up to 3 independent RIB’s to experiments.
I will concentrate on the current RIB production and TRILIS, the TRIUMF resonant ionization laser ion source. In a typical operating year from April-December about 3000h of high intensity RIB beam delivery is achieved. About 70% of these high intensity RIB beam delivery involves the laser ion source. On average isotopes from 13 different elements are scheduled for the laser ion source - therefore operational aspects, as well as developments towards higher intensities, greater variety of elements laser ionized and increased beam purity will be discussed. TRILIS only uses solid state lasers. Since the fist laser ionized beam in 2004, ionization schemes for more than 40 different elements have been developed and isotopes of these have been delivered. As laser resonance ionization is the only element selective ionization method also “in source" laser spectroscopy will be discussed. The talk will end with an outlook into the future, multi beam RIB operation scenario.

 

Host laboratory: Nuclear spectroscopy laboratory

Contact person: Minori Tajima (mtajima@riken.jp)

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