While most of the team was on vacation or otherwise out of the country, Jasper, Milan, and Constantin visited ZARM in Bremen to have our Experiment Acceptance Review (EAR), which we passed!
The main part of this review was not the presentation but a thermal vacuum test of the whole instrument, simulating the expected conditions we will face during the balloon flight in October.
We struggled with temperature management of the experiment: The experiment lost too much temperature too fast. To counteract this, we removed some emmissive tape and added a small “hat” to keep some temperature in the sensor-head, the part where the BGO crystals and photodiodes are located.
We were allowed another hour in the chamber after modifying SETH to verify that our improvements worked. After a presentation on the following day, the experiment was packed and turned over to ZARM to ship to Kiruna. We will fly to ESRANGE on the 3rd of October. Until then, we are working on an analysis of the test measurements we took.
