  In our previous studies on the development of a new type of matching section
for dielectric-loaded accelerating (DLA) structures, a significant discrepancy
was found between measurements and simulations [Y. Wei, et al., Phys. Rev.
Accel. Beams 25, 041301, 2022]. This discrepancy was caused by the fabrication
errors on the dielectric dimensions. Through introducing the measurement
techniques during the fabrication processing on the dielectric tube, we show
that this discrepancy can be improved. A new prototype of X-band dielectric
tube was then fabricated. The preliminary cold-tests are performed for this
dielectric tube without coating.
