  Xtend is a soft X-ray imaging telescope developed for the X-Ray Imaging and
Spectroscopy Mission (XRISM). XRISM is scheduled to be launched in the Japanese
fiscal year 2022. Xtend consists of the Soft X-ray Imager (SXI), an X-ray CCD
camera, and the X-ray Mirror Assembly (XMA), a thin-foil-nested conically
approximated Wolter-I optics. The SXI uses the P-channel, back-illuminated type
CCD with an imaging area size of 31 mm on a side. The four CCD chips are
arranged in a 2$\times$2 grid and can be cooled down to $-120$ $^{\circ}$C with
a single-stage Stirling cooler. The XMA nests thin aluminum foils coated with
gold in a confocal way with an outer diameter of 45~cm. A pre-collimator is
installed in front of the X-ray mirror for the reduction of the stray light.
Combining the SXI and XMA with a focal length of 5.6m, a field of view of
$38^{\prime}\times38^{\prime}$ over the energy range from 0.4 to 13 keV is
realized. We have completed the fabrication of the flight model of both SXI and
XMA. The performance verification has been successfully conducted in a series
of sub-system level tests. We also carried out on-ground calibration
measurements and the data analysis is ongoing.
