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, K. Hasegawa, E. Ideguchi, N. Imai, T. Kobayashi, M. Matsushita, S. Michimasa, H. Otsu, S. Shimoura, T. Teranishi

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)180-184
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume376
DOIs
Publication statusPublished - 2016 Jun 1

Keywords

  • Momentum-compression mode
  • Slowed-down RI beam
  • Transfer reaction

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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    Sumikama, T., Ahn, D. S., Fukuda, N., Inabe, N., Kubo, T., Shimizu, Y., Suzuki, H., Takeda, H., Aoi, N., Beaumel, D., Hasegawa, K., Ideguchi, E., Imai, N., Kobayashi, T., Matsushita, M., Michimasa, S., Otsu, H., Shimoura, S., & Teranishi, T. (2016). First test experiment to produce the slowed-down RI beam with the momentum-compression mode at RIBF. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 376, 180-184. https://doi.org/10.1016/j.nimb.2016.02.053