Speaker
Description
The Isotope Separation On-Line (ISOL) system at the Institute for Rare Isotope Science (IRIS) has successfully produced a variety of rare isotopes (RIs). Various diagnostic devices are used to verify the RIs. Ions extracted from the Target Ion Source (TIS) are cooled and bunched using the Radio Frequency Quadrupole Cooler-Buncher (RFQ-CB) to improve the charge breeding efficiency of the Electron Beam Ion Source (EBIS) and enhance the performance of the Multiple-Reflection Time-of-Flight Mass Spectrometer (MMS) and Collinear Laser Spectroscopy (CLS) systems. The RFQ-CB can deliver up to 1E+8 ions per bunch to the EBIS by cooling and bunching a continuous-wave (CW) beam. The beamline was optimized using stable ion beams such as Cs, Na, and Sn. As a result, up to 1E+8 stable ions were delivered in a bunch with a duration of several tens of microseconds. For the small quantities of RIs produced, the beams were measured using a plastic scintillator and a multi-channel plate (MCP) detector. Ions with short half-lives were identified by analyzing the gamma spectra using high-purity germanium (HPGe) detectors and the scintillator. To accelerate the RIs in SCL3, it is necessary to adapt the beam energy to 10 keV/u. Beam commissioning was carried out using the RFQ-CB and EBIS to meet this condition. This year, an experiment was conducted to charge breed 25Na ions produced from a SiC target and accelerate them in SCL3. Currently, the produced rare isotopes are being delivered to the MMS and CLS systems for nuclear physics experiments involving various ion species. This presentation will discuss the current status of the ISOL system and the RFQ-CB in the context of RI beam experiments.
| Email address | sjheo@ibs.re.kr |
|---|---|
| Classification | Isotope production, target, and ion source techniques |
