Elliptically Bent X-Ray Mirrors with Active Temperature Stabilization

Table 2

Mirror curvature change and RMS slope error corresponding to different container temperatures, relative to the initial 21 C state. The corresponding focal change and residual RMS slope error (after compensation) are also given.

$T$ (C)	21	21.7	22.2	22.5	23.1	23.5	23.9	24.3	24.8	25.2
curvature change (10^−5 m^−1)	0	−1.81	−2.87	−2.57	−3.17	−4.3	−5.09	−5.17	−5.69	−6.36
rms slope error ($\mu$rad)	0.55	0.70	0.97	0.87	1.00	1.27	1.41	1.47	1.60	1.74
required defocus compensation (mm)	0.00	0.10	0.17	0.20	0.25	0.26	0.28	0.30	0.35	0.40
rms slope error after defocus compensation ($\mu$rad)	0.55	0.56	0.68	0.65	0.71	0.78	0.76	0.87	0.83	0.87