A time detector is under development for the mass measurement with the Rare-RI (radioactive isotope) Ring at the RI beam factory (RIBF) in RIKEN. To perform successful mass measurement, a time detector requires a small energy loss of the ion beams, a good time resolution, and a sufficient detection efficiency. To satisfy these requirements, our time detector utilizes isochronous transport of the secondary electrons emitted from a thin foil. The isochronous transport of the electrons from the foil to the micro-channel plate (MCP) detector is provided by the crossed electromagnetic field. To improve the detection efficiency, the transport time of the electrons is reduced by a factor of two using a strong magnetic field. An experiment to test the performance of the time detector was carried out with heavy ion beams. The time resolution was σ < 100 ps with a maximum detection efficiency of 99% for heavy ion beams. The details of the detector are presented in this contribution.
|Journal||Proceedings of Science|
|Publication status||Published - Jan 1 2016|
|Event||26th International Nuclear Physics Conference, INPC 2016 - Adelaide, Australia|
Duration: Sep 11 2016 → Sep 16 2016
All Science Journal Classification (ASJC) codes