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.
N1 - Funding Information:
We wish to thank RIKEN Nishina Center for Accelerator-Based Science for financial support of this research. We would like to thank Dr. M. Wakasugi of RIKEN, Dr. M. Koizumi and Dr. M. Ohba of JAEA and Dr. T. Mitsugashira of IRCNMS for providing us their laser components. Also we would like to express our appreciation of Mr. H. Imamura of Hakuto Co., Ltd., K. Onozaki of Onozaki Seisakusho, Mr. T. Kimura of Coherent Japan, Ms. W. Kina of Indeco, Inc. and Dr. T. Kambara and Dr. T. Kobayashi of RIKEN for their kind support. We are grateful to M. Huyse, P. Van Duppen, Yu. Kudryavtsev, R. Ferrer and P. Van den Bergh of K.U. Leuven for their support and fruitful discussions during development.
PY - 2013
Y1 - 2013
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 -