4.1.3.2 Assumptions for quantum efficiency measurements

1.

Tritium and HEXS were both used.

2.

The nominal flux of 6400 ct/CCD/frametime was used.

3.

The reference detector was illuminated by chopping.

4.

``Variable voltage'' measurements were made at two energies to confirm depletion depth measurements.

5.

To minimize pump-down overhead, quantum efficiency measurements were made immediately after high-energy spectral resolution measurements.

  

System Energy Total Cts No. of

(keV) (/energy/CCD quad.) Frames

$$2.5\times 10^{6}$$ Tritium 0.277 (C-K) 1600 (BI only)

$$2.5\times 10^{6} 1600 \times 2$$ Tritium 0.525 (O-K) 0.677 (F-K)

$$2.5\times 10^{6} 1600 \times 5$$ HEXS 1.740 (Si-K) 2.014 (P-K) 4.511 (Ti-K) 5.899 (Mn-K) 8.048 (Cu-K)

$$2\times 10^{4} 200 \times 8 \times 2$$ HEXS 5.899 (Mn-K)

(var.volt.) 8.048 (Cu-K)