DURATION: 2020/04/15  9:00-17:00 JST, all times posted in JST

operator shift : M. Nakano
co-operator shift : H. Hayakawa
 
CURRENT ENVIRONMENT: very unstable due to unknown reason

shift SUMMARY : down at almost all time

time / event

9:00 / shift started. detector was unlocked.

9:20 / obs. mode (21min)
yaw of IMMT1 was moved from -9000 to -8500 counts before getting this obs. mode. (by Ushiba-san)
9:41 / lock loss

Nakano-san, Tomaru-san and Miyoki-san have been trying to recover it in the mine since this afternoon.

duty cycle 2020/04/15 09:00 -- 17:00 : Observation mode 4.4%