Figure 8
STJ energy resolution as a function of X-ray energy in the soft X-ray band between 50 eV and 1 keV (solid circles). The electronic noise is due to increased IR-photon flux when operating the detector at the end of a cold finger behind three IR-blocking windows. The intrinsic noise (open circles), calculated by subtracting the electronic noise from the measured resolution in quadrature, approaches the statistical limit (solid line). |