LabVIEW based High Precision Temperature Logger for the project PARAS

Abstract

The “High Precision Temperature Logger” is designed for the project PARAS (PRL Advance Radial velocity Abu sky Search) to achieve a maximum temperature stability (like 0.01°C rms) throughout the period of observation of thermally insulated chamber where PARAS spectrograph is installed. The scientific aspect of the temperature controlled environment is to bring down the error in radial velocity measurement to 1m/s. Radial velocity (RV) technique is used to determine various orbital parameters in exo-planet search. It has been found that temperature variation of 1°C at the spectrograph environment can increase the error in radial velocity measurement by few thousands of m/s. Mechanical flexures (in the scale of micrometers) in the optical components can increase the error by a significant percentage due to temperature and pressure variations. So the temperature stability is very important for the PARAS project. So high precision temperature logger with a high stability is designed for PARAS project with the help of LabVIEW.