Thin Shell, Segmented X-Ray Mirrors

Table 1

Foil mirror parameters.

	SXS/Micro-X	BBXRT	SODART	ASCA	Astro-E/E2 SXT-I	Astro-E/E2 SXT-S
Number flown	1	2	0	4	8	2
Diameter (cm)	40	40	60	35	40	40
Focal length (m)	2.1	3.77	8	3.5	4.75	4.5
Number of Shells	68	118	143	120	175	168
Number of modules per mirror	4	4	4	4	4	4
Segment length (cm)	10	10	20	10	10	10
Total number of segments	544	944	1144	960	1400	1344
AI Substrate thickness (mm)	0.127	0.127	0.4	0.127	0.152	0.152
Surface production method	lacquer	lacquer	lacquer	lacquer	replication	replication
Reflective coating	gold	gold	gold	gold	gold	gold
Mass (kg)	20	20	101	9.84	19.3	19.9
Effective area at 1 keV (cm^2)	300	290	950	300	450	450
Effective area at 7 keV (cm^2)	—	125	750	150	250	250
Angular resolution (HPD-arcmin)	3	3	2.4–3.8	3.6	1.6-1.7	1.7
Year of launch	1988	1990	—	1993	2000, 2005	2000, 2005