CXO Project Science: Tantalum shielding viewed from HRC-S, during ACIS-S observation

Figures display tantalum components as viewed from the HRC-S focal plane, during an ACIS-S observation --- the more benign Next-in-Line (NiL) condition for the HRC. Key components are the magnet baffle (blue), the stovepipe and brim (green), the focus-structure baffle (yellow) and the limiting aperture of the HRC snout (red). The left panel displays the existing focus-structure baffle, its full extent (line) and the central 21-in diameter (solid); the right panel omits all focus-structure shielding.

In the NiL position, much of the solid-angle subtended by the HRC snout is unshielded, even with the focus-structure tantalum. Furthermore, the focus-structure tantalum provides little additional shielding.

Tantalum viewed from HRC-S center

Tantalum viewed from HRC-S perimeter

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