TY - JOUR
T1 - Development of a resonant laser ionization gas cell for high-energy, short-lived nuclei
AU - Sonoda, T.
AU - Wada, M.
AU - Tomita, H.
AU - Sakamoto, C.
AU - Takatsuka, T.
AU - Furukawa, T.
AU - Iimura, H.
AU - Ito, Y.
AU - Kubo, T.
AU - Matsuo, Y.
AU - Mita, H.
AU - Naimi, S.
AU - Nakamura, S.
AU - Noto, T.
AU - Schury, P.
AU - Shinozuka, T.
AU - Wakui, T.
AU - Miyatake, H.
AU - Jeong, S.
AU - Ishiyama, H.
AU - Watanabe, Y. X.
AU - Hirayama, Y.
AU - Okada, K.
AU - Takamine, A.
PY - 2013/1/7
Y1 - 2013/1/7
N2 - 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.
AB - 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.
KW - Gas jet
KW - Laser ion source
KW - Laser spectroscopy
KW - Resonant laser ionization
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U2 - 10.1016/j.nimb.2012.10.009
DO - 10.1016/j.nimb.2012.10.009
M3 - Article
AN - SCOPUS:84871794385
VL - 295
SP - 1
EP - 10
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
ER -