We report on the white dwarf cooling sequence of the old globular cluster NGC 6752 , which is chemically complex and hosts a blue horizontal branch .
This is one of the last globular cluster white dwarf ( WD ) cooling sequences accessible to imaging by the Hubble Space Telescope .
Our photometry and completeness tests show that we have reached the peak of the luminosity function of the WD cooling sequence , at a magnitude m _ { F 606 W } =29.4 \pm 0.1 , which is consistent with a formal age of \sim 14 Gyr .
This age is also consistent with the age from fits to the main-sequence turnoff ( 13-14 Gyr ) , reinforcing our conclusion that we observe the expected accumulation of white dwarfs along the cooling sequence .