1. [1] S. Itoh et al., Nucl. Instr. Meth. Phys. Res. A 631, 90 (2011).
2. [2] S. Itoh et al., AIP Conf. Proc., in press.
3. [3] S. Itoh et al., J. Phys.: Conf. Series, in press.
4. [4] D. Kawana et al., J. Phys.: Conf. Series, in press.
5. [5] D. Kawana et al., arXiv:1710.00487 (2017).