Low-Energy Electron Scattering for Nucleon and Exotic Nuclei (LEES2024)

Present status and perspective of the ISOL system, ERIS,at the SCRIT electron scattering facility

Oct 28, 2024, 2:30 PM

30m

TOKYO ELECTRON House of Creativity (東北大学知の館), Tohoku University

Session

Speaker

Dr Tetsuya Ohnishi (RIKEN Nishina Center for Accelerator-Based Science)

Description

In electron scattering off unstable nuclei, the radioactive isotope (RI) beam production is
one of most important experimental parts. A low-energy high-quality RI beam with low emittance and small energy spread is needed for SCRIT. Furthermore, a high-intensity RI beam is also required in order to obtain a sufficient luminosity. To satisfy these requirements, we constructed an online isotope separator named electron-beam-driven RI separator for SCRIT, ERIS, at the SCRIT electron scattering facility.[1] In ERIS, photofission of uranium is used for the RI production, and production target is self-made uranium carbide disks, which is 18-mm in a diameter and 0.8-mm in a thickness.
%which total amount of uranium is approximately 28 g. Recently, 137Cs beam was produced for the world's first electron scattering experiment with online-produced RI
at the SCRIT facility.[2], and rate of pulsed 137Cs ion beam was 2*10^7 ions/pulse with a 15-W electron beam and a total of approximately 28-g uranium.

In this contribution, we will report the present status and upgrade plane of ERIS.

Presentation materials

241028_eris.pdf