The ACS Survey of Galactic Globular Clusters , an HST Treasury Project , will deliver high quality , homogeneous photometry of 65 globular clusters .
This paper introduces a new collection of stellar evolution tracks and isochrones suitable for analyzing the ACS Survey data .
Stellar evolution models were computed at \mathrm { [ Fe / H ] } = -2.5 , -2.0 , -1.5 , -1.0 , -0.5 , and 0 ; \mathrm { [ \alpha / Fe ] } = -0.2 , 0 , 0.2 , 0.4 , 0.6 , and 0.8 ; and three initial He abundances for masses from 0.1 to 1.8 \mathrm { M _ { \odot } } and ages from 2 to 15 Gyr .
Each isochrone spans a wide range in luminosity from M _ { V } \sim 14 up to the tip of the red giant branch .
These are complemented by a set of He-burning tracks that extend from the zero age horizontal branch to the onset of thermal pulsations on the asymptotic giant branch .
In addition , a set of computer programs are provided that make it possible to interpolate the isochrones in \mathrm { [ Fe / H ] } , generate luminosity functions from the isochrones , and create synthetic horizontal branch models .
The tracks and isochrones have been converted to the observational plane with two different color- \mathrm { T _ { eff } } transformations , one synthetic and one semi-empirical , in ground-based B , V , and I , and F606W and F814W for both ACS-WFC and WFPC2 systems .
All models and programs presented in this paper are available from http : //stellar.dartmouth.edu/ $ ∼ $ models/ and the Multimission Archive at the Space Telescope Science Institute ( MAST ; http : //archive.stsci.edu ) .