nEDM Heat Flush Test at Harvard

By Doug Beck
November 7, 2016


In the nEDM experiment, we have to move 3He from one place to another during each measurement. To do this we create a “wind” of phonons (like sound waves) using a heater. The wind actually blows the 3He atoms from warmer to colder regions. In Ike Silvera’s lab at Harvard, we test the effect by measuring the increase in pressure due to the higher 3He concentration in the cold region. After seeing the effect for the first time in our last run in August, we are now trying to improve the signal-to-noise ratio and improve our understanding of the timescales for this “heat flush” effect.