A use of bulk high-temperature superconductors
(HTSs) for an undulator is attractive since a high magnetic field
can be generated at low-temperatures. While potential for generation
of the high magnetic field is high, in-situ magnetization of
the bulk HTSs for periodic field generation is challenging issue.
Recently, we proposed a new type of undulator using bulk high-Tc
superconductors (HTS) and a solenoid magnet. The undulator,
named Bulk HTSC staggered array undulator (Bulk HTSC SAU),
consists of a stacked array of bulk HTSs and copper insulators and
a solenoid magnet. A proof of principle experiment at 77 K using
liquid nitrogen has been carried out. The estimated performance
at about 30 K was estimated using results of property measurements
for the HTS used for the Bulk HTSC SAU. The expected
undulator peak field reaches to 1.08 T for undulator period length
of 9.9 mm for the undulator gap of 4.0 mm. This performance is
about 2 times higher than that of existing technologies.