Review Article

Present Status and Future Perspectives of the NEXT Experiment

Figure 34

Energy resolution in the high-pressure xenon electroluminescent TPC. Data points show the measured energy resolution for 662 keV gammas (squares), ~30 keV xenon X-rays (triangles), and LED light pulses (circles) as a function of the number of photons detected. The expected resolution including the intrinsic Fano factor, the statistical fluctuations in the number of detected photons, and the PMT charge measurement variance is shown for X-rays (dot dot dashed) and for 662 keV gammas (solid line). Resolutions for the 662 keV peak were obtained from 15.1 atm data runs while X-ray resolutions were obtained from 10.1 atm runs [38].
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