The concentrator/spectrometer system consists of four
separate concentrator mirror assemblies with a focal length of 185 cm,
each one with a position sensitive, Xenon filled, GSPC in the focal
plane, three covering the 1.3-10 keV range (
MECS), the fourth extending
the range down to 0.1 keV ( LECS).
The mirror assemblies, for which the development and testing
has been performed by IFCTR and IFCAI, are composed of 30 nested gold
coated, confocal double cone approximation to a Woltjer 1
configuration. X-ray test on the prototype mirrors (Citterio et
al. 1990, Conti et al. 1993, 1995) and on the flight unit in Panter
have shown a resolution of 40" (HPR), better than the design goal of 1
arc min, and confirmed the prediction on the effective area.
The concentrators are designed to maximize their effective area around
7 keV for studies of iron line .
| Configuration | Double cone |
|---|---|
| Focal | 185 cm |
| geometric area | 124 cm2 |
| n. mirrors | 30 |
| mirror length | 30 cm |
| grazing angle:external | 0.62ø |
| inner | 0.23ø |
| micro roughness | <10 Angstrom |
| Resolution (HPR) | 1 arcmin (design) |
| 40" FM measured | |
| Effective area | 84 cm2 @0.3 keV |
| 81 cm2 @0.9 keV | |
| 57 cm2 @6.4 keV | |
| 38 cm2 @8 keV | |
 |
Questions should be addressed to: helpdesk@sax.sdc.asi.it |
Maintained by
L.A. Antonelli ,
F.Fiore &
P.Giommi
Last update: July 12, 1996