Resonant Ionization Laser Ion Source Project at TRIUMF

Abstract

Resonant laser excitation and ionisation is one of the most successful tools for the selective production of radioactive ion beams (RIB) at on-line mass separator facilities. TRIUMF plans to augment the current ion sources with a resonant ionisation laser ion source (RILIS), to use the high production yields from the target, as shown by the delivery of 3 Â 10 4 /s 11 Li ions from a standard target ion source with surface ionisation. The development and installation of TRIUMF's RILIS (TRILIS) is necessary to provide beams of short lived isotopes that conventional ion sources could not produce in sufficient intensity and purity for nuclear-, and nuclear astrophysicsexperiments. A laser system consisting of three tunable titanium-sapphire (TiSa) lasers with frequency doubling and tripling was employed to demonstrate first off-line resonance ionisation of Ga, and is being installed for first on-line test and a run on 62 Ga in December 2004.

Reorientation-effect measurement of the〈21+∥E2̂∥21+〉matrix element inOrce1, Drake2, Djongolov3 et al. 2012Phys. Rev. CSelf Cite270191View full textAdd to dashboardCite

“…A tantalum primary fragmentation/spallation target was bombarded by a 500-MeV, 40-µA proton beam from the TRI-UMF main cyclotron to produce radioactive 10 Be. Singlycharged 10 Be ions were extracted using the TRIUMF Resonant Ionization Laser Ion Source (TRILIS) [18]. Following mass separation the isotopically pure 10 Be beam was further stripped to a 2 + charge state before acceleration to a projectile kinetic energy of T P =41 MeV.…”

Status of GISELE: a resonant ionization laser ion source for the production of radioactive ions at GANIL

“…This system is compact, reliable and virtually maintenance-free making it well suited for online production. TheTi:Sa lasers were manufactured by the TRILIS group at TRIUMF (Vancouver, Canada) [7]. Higher harmonics are generated in two frequency conversion units designed and manufactured at Mainz [8].…”

26 Al beam production by a solid state laser ion source at TRIUMF

“…Aluminium has an ionization potential of 5.99 eV, hence the surface ionization efficiency at 2,000 • C was calculated to be 0.6% from a Re foil. In order to provide the required intensity with the lowest isobaric contamination the TRIUMF resonant ionization laser ion source (TRILIS) [6] was used.…”

“…Resonant laser ionization allows for element selective ionization [6][7][8][9][10][11][12] as each element has a specific spectroscopic fingerprint. For resonance excitation / ionization the laser wavelengths are tuned precisely to the frequencies of the optical transitions in the selected excitation scheme.…”

“…The laser beams are focused into this ionizer tube to enhance the ionization of aluminium. After ionization and ion extraction a high resolution ( m/m = 1/5,000) mass separator magnet selects the isotopes of interest [6].…”