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Report No.
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New gas-filled recoil ion separator GARIS-II developed for SHE study

Kaji, Daiya*; Morimoto, Koji*; Sato, Nozomi; Yoneda, Akira*; Haba, Hiromitsu*; Ozeki, Kazutaka*; Sumita, Takayuki*; Morita, Kosuke*

We designed a new gas-filled recoil ion separator GARIS-II for actinide-based asymmetric fusion (hot fusion) study at RIKEN. GARIS-II was designed on the basis of extensive experiences with construction, development, and operation of GARIS. GARIS-II consists of five magnets arranged in a Qv-D-Qh-Qv-D configuration, where D and Q denote dipole and quadrupole magnets, respectively. Ion optical characteristics were analyzed using the computer code TRANSPORT. The solid angle of GARIS-II is 20.2 msr. The total path length of the separator is 5.12 m. GARIS-II will be able to use various filled gas, such as He and He/H2 mixture. The separator will be able to transport the recoil ion with magnetic rigidity of 2.44 Tm.

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