MUMON (Suzuki)

MUMON room and MUMON – Checked the outside and the inside by viewing– There seems to be no damage to the wall of the room and sensors– It was confirmed that the moving stage can be controlled from Muhut, and

was not damaged. (Electric power cable of moving stand was not damaged)

Signal and HV cables btw MUMON and Muhut– Checked by using test pulse and confirmed the reflection pulse by the

oscilloscope

MUMON room

Si

Moving stage

16

gas line

MUMON• Electric power cable btw NU3 and Muhut

– Cut by the gap of the ground due to the earthquake

– Repaired by facility group on Mar.12.• Gas-line– Confirmed: No leakage in whole gas line

including MUMON chamber was found after initial leak check. (Further leak check will be done when all equipments are ready)

– Some parts are distorted by the earthquake• The distorted part outside NU3 is tentatively

removed for the repair work around NU3.

Electric power cable

Gas-line

17

MUMON: Detail items1. PCs in Muhut: No damage2. Electronics in Muhut: No damage－ AVR is not turned on yet (Need Sakashita san’s check) 3. Equipments (incl. its cables) to measure the gas

pressure, the temperature, the gas flow and the O2 which are located in NU3

- Pressure sensors were checked by tester, and not damaged.- O2 monitor was turned on, and worked OK.- Temperature and flow sensors will be check within few weeks.

4. Sensors (Si and IC)-Will be checked after the full recovery of the power in the Muhut.-The schedule is not decided yet

5. Alignment of MUMON－ Need to be done. The schedule is not decided yet.

18