During March 2021 three test campaigns were performed making tests 4048 to 4051 using the fusion chamber ERC-39. In the last test number 4051, it was read an average radiation measurement of 21.2 millivolts instead of 0.262 to 0.293mV measured in previous tests. The measurement is done using a broadband high-speed photodiode at a  50 ohms load. In order to avoid saturating the photodiode, a black body filter is inserted that reduces the energy received to 1/15000 Here is the plot result without loss reduction. It was used a 4GHz 12bit oscilloscope. Channel 1 corresponds to the photodiode sensor: And here is the plot correspondingRead More →