Yale Doppler Diagnostic Facility
The Yale Doppler Diagnostic Facility (YDDF) was designed as a test bench to investigate instrumental effects on high resolution spectra used in Doppler planet searches. We can reproduce different spectrograph configurations and quantify the impact of environmental conditions (like temperature and pressure). A fully-functional high-resolution optical spectrograph in the lab provides us with an excellent testbed for developing and testing components we will incorporate in future instruments such as EXPRES. We are currently using YDDF to test Single-Lock, a novel prototype wavelength calibration system using a stabilized etalon locked to the hyperfine structure of the 5P3/2 Rubidium transition.