Uniform air-flow cooling for high power crates

In the course of developing circuits requiring wide dynamic range, low noise, and high precision, the authors needed to know how well they could control ambient temperatures. They built a standard cooling unit that provides reasonably uniform air flow with relatively high air speed. Other data were included that were obtained during the R&D research and development work for the unit. It was found that the uniformity of the cooling air flow should be expected to be worse than 30% and the gradient of the air velocity to be worse than 1.6 (m/s)/2 cm. It was concluded that a cooling system should be attached if each module consumes significantly more than 30 W