Precision laser spectroscopy of Be isotopes and prospects for SLOWRI facility at RIKEN

Wada, M.; Takamine, A.; Sonoda, T.; Schury, P.; Okada, Kazuya

doi:10.1007/978-3-642-12286-6_5

Cited by 1 publication

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“…Such low-energy beams open up opportunities to study ground state properties of exotic nuclei by experimental techniques such as laser spectroscopy and ion trapping. At RIKEN, a universal slow RI-beam facility, SLOWRI, based on a gas catcher cell with an RF-carpet ion guide [1] [2], was assigned as one of the principal facilities of RIBF. A novel method, named PALIS (PArasitic RI-beam production by Laser Ion-Source) [3] was also approved for the construction, to expand the usability and reduce experimental costs by utilizing unused RI-beams produced by projectile fragmentation or in-flight fission.…”

Section: Introductionmentioning

confidence: 99%

Development of a resonant laser ionization gas cell for high-energy, short-lived nuclei

Sonoda

Wada

Tomita

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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A new laser ion source configuration based on resonant photoionization in a gas cell has been developed at RIBF RIKEN. This system is intended for the future PArasitic RI-beam production by Laser Ion-Source (PALIS) project which will be installed at RIKEN's fragment separator, BigRIPS. A novel implementation of differential pumping, in combination with a sextupole ion beam guide (SPIG), has been developed. A few small scroll pumps create a pressure difference from 1000 hPa ∼ 10 −3 Pa within a geometry drastically miniaturized compared to conventional systems. This system can utilize a large exit hole for fast evacuation times, minimizing the decay loss for short-lived nuclei during extraction from a buffer gas cell, while sufficient gas cell pressure is maintained for stopping high energy RI-beams. In spite of the motion in a dense pressure gradient, the photo-ionized ions inside the gas cell are ejected with an assisting force gas jet and successfully transported to a high-vacuum region via SPIG followed by a quadrupole mass separator. Observed behaviors agree with the results of gas flow and Monte Carlo simulations.

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Section: Introductionmentioning

confidence: 99%