Real time computations of cryogenic He properties

The Fermilab PIP-II (proton improvement plan - II) project is being constructed at Fermilab to deliver 800\, MeV protons of >1\, MW beam power to replace the present LINAC and provide protons to the remainder of the existing accelerator complex. The new LINAC consists of a warm front end, 23 superconducting RF cryomodules, and a beam transfer line to the existing complex. The cryomodules (CMs) are to be tested at Fermilab's CryoModule Test Facility (CMTF). An important measurement in cryogenic testing is the heat load of each CM. Traditionally, at Fermilab, these measurements were made collecting archived data offline and analyzing it. The new control system for PIP-II is being developed with the EPICS (Experimental Physics and Industrial Control System) framework, which allows us to compute the heat load in real time using the HePak library. We are exploring other He properties, such as flow, where flow meters are not available, which can also be calculated in real time and fed back to the cryogenics engineers. This paper details the real time heat load calculation and He flow software developed for CM testing at CMTF, as well as the first results from the prototype HB650 CM. Future plans for 2-phase LHe flow will also be outlined.