by google translation
We succeeded in stably generating the current flow by autonomously controlling the function of emitting electrons from the field emission type electron source and the voltage of the field emission type electron source.
We confirmed that the charging state of "KOUNOTORI" changes as expected by emitted electrons, and demonstrated the effectiveness of field emission type electron source.
1. Background and results
January 28 21:35 (Japan time, same below)
Prior to endmass emission, cutting of the four bolts holding the end mass is started.
Only the No. 3 bolt does not indicate "disconnection" even if a disconnection command is sent, and sends a disconnection instruction multiple times.
After the command, after a few minutes it became "disconnected", so continue the experiment preparation.
January 28 22:35
End-mass release ready
January 29 00:08
End Mass emission command transmission. It can not be discharged.
After that, further troubleshooting was done, and until the end of the experiment on February 5,
We tried to release but could not discharge.
2. Cause investigation situation
Currently, we investigate the data obtained during the experiment and are investigating the cause.
One of the four bolts fixing the endmass is not separated and the endmass is solved
I think that the possibility that it is not released is the highest.