Hydrodynamic Calculations and Bench Tests of the Cooling System of ADC64ECal Electronics in the Leakless Mode

In this paper, an approach to the analysis of hydraulic characteristics for the cooling and thermal stabilization systems of subdetectors in the MPD setup is described, including mathematical modeling and bench tests. Distributed and discrete models are used to simulate the cooling fluid flow. For bench tests, an automated test bench representing a software–hardware complex with vacuum and circulation pumps and liquid pressure, liquid flow rate, and temperature sensors has been developed. The test bench design may be transformed in compliance with formulated test problems. It has been experimentally established that, at a nominal cooling fluid flow rate of 0.006 kg/s, the pressure drop on one cooling pipeline of ADC64ECal modules is ≈0.12 atm. Numerical calculation and experimental measurement results for the pressure drop agree with each other with a deviation less than 2%. The transition to the leakless mode (absolute pressure, 0.4–0.0 atm) does not change the pressure–flow rate characteristic of the ECal panel when compared to the regime of flow at a superatmospheric pressure. The proposed approach is applicable to a broad spectrum of problems on the characterization and commissioning of the thermal stabilization and cooling system of the ТРС detector and other MPD setup detectors.