Preparation for vibration isolation system installation in NM2 vacuum tank.

Workers: Tatsumi and Eleonora


We star by checked the double-pendulum system which were moved form warehouse to TAMA central room.
We found that coil mass and electric cable were missing (fig 1-2).

We opened PD vacuum chamber and we found a completely assembled isolator stack with a double-pendulum system (fig 3).
(It was meant to be used to suspend a signal recycling mirror in TAMA.)

We checked this system too and we found that just the electric connectig cable was missing.

Since this vibration isolation system (both double pendulum and stack isolator) is in a better condition than the one stored in the warehouse,
we planned to use this one for suspending filter cavity input mirror in NM2 vacuum tank.

In order to do that, we checked that system dimensions were compatible with the ones needed for NM2 tank (fig 4-5).

Next week we will remove current TAMA SAS system from NM2 vacuum tank and we will replace it with the vibration isolation system at present placed in PD vacuum chamber.