First test experiment to produce the slowed-down RI beam with the momentum-compression mode at RIBF

T. Sumikama D.S. Ahn N. Fukuda N. Inabe T. Kubo Y. Shimizu H. Suzuki H. Takeda N. Aoi D. Beaumel 1 K. Hasegawa E. Ideguchi N. Imai T. Kobayashi M. Matsushita S. Michimasa H. Otsu S. Shimoura T. Teranishi
1 IPNO - Institut de Physique Nucléaire d'Orsay
Abstract : The 82Ge beam has been produced by the in-flight fission reaction of the 238U primary beam with 345 MeV/u at the RIKEN RI beam factory, and slowed down to about 15 MeV/u using the energy degraders. The momentum-compression mode was applied to the second stage of the BigRIPS separator to reduce the momentum spread. The energy was successfully reduced down to 13 ± 2.5 MeV/u as expected. The focus was not optimized at the end of the second stage, therefore the beam size was larger than the expectation. The transmission of the second stage was half of the simulated value mainly due to out of focus. The two-stage separation worked very well for the slowed-down beam with the momentum-compression mode.
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Submitted on : Tuesday, June 21, 2016 - 3:59:57 PM
Last modification on : Thursday, January 11, 2018 - 6:12:41 AM

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T. Sumikama, D.S. Ahn, N. Fukuda, N. Inabe, T. Kubo, et al.. First test experiment to produce the slowed-down RI beam with the momentum-compression mode at RIBF. XVIIth International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS2015), May 2015, Grand Rapids, MI, United States. pp.180-184, ⟨10.1016/j.nimb.2016.02.053⟩. ⟨in2p3-01335030⟩

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