Ritual Unicorn Sacrifice

Yesterday was a double-occasion: Suren’s birthday, and the first time that we filled the cryostat with liquid nitrogen. To celebrate, and to appease the temperamental cryogenic gods, we performed the ritual sacrifice of a unicorn (pinata). The liquid nitrogen is used to pre-cool everything before we switch to the even colder liquid helium.

In the week leading up to this point, we had to test for leaks in our vacuum vessel (and had no leaks!), pump it out to thermally isolate the different temperature stages, and test all of our cryogenic gear.

Outside of cryostat progress, we also completed the second run of the Bemco thermal/vacuum test chamber, built the gondola frame that will carry everything in flight, and started testing some of our calibration equipment.

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