Speaker
Description
The Self-Confining RI Ion Target(SCRIT) method is a unique technique for forming an ion target for electron-RI scattering experiments. In the SCRIT method, target ions are trapped in all three spatial dimensions inside the electron storage ring. The world's first electron scattering experiment with $^{137}$Cs ions produced by the ISOL was successfully conducted at RIKEN RI Beam Factory [1].
For electron scattering experiments with rare isotopes such as $^{132}$Sn, the luminosity at the SCRIT facility is currently insufficient. Previous studies showed that only 10-20% of the injected target ions contribute to the electron scattering process. This suggests that the trapped ion properties, including their charge state, energy, and spatial distributions, evolve during trapping, which may cause most of the trapped ions to escape from the trap before they can interact with the electron beam [2]. To increase the luminosity, it is necessary to understand the time evolution of the trapped ion properties and to optimize the target conditions to increase the contribution ratio.
In this study, we developed a method to evaluate the time evolution of the trapped ion properties in SCRIT by comparing the properties of ions extracted after trapping with ion transport simulations. We report the evaluation method in detail and discuss the results.
References
[1] K.Tsukada et al., Phys. Rev. Lett. 131, 092502 (2023)
[2] R.Ogawara et al., Nucl. Instrum. Methods Phys. Res. B 317, 674 (2013)
| Email address | y.kikuchi.985@ms.saitama-u.ac.jp |
|---|---|
| Supervisor's Name | Takayuki Yamaguchi |
| Supervisor's email | yamaguti@mail.saitama-u.ac.jp |
| Funding Agency | This work was supported by JSPS KAKENHI Grant Number JP24004788 and JP23725901. |
| Classification | Ion traps and laser techniques |
