Status of vacuum system in South arm of TAMA

I checked the vacuum system for South arm in TAMA on 20th.
The 300m arm tube is in vacuum, 71mTorr at the South End and 92mTorr at the Mid point.
Three TMPs (Near, Mid, and End) along the arm can work with the rotary pumps (RPs).
We can start to evacuate the tube without initial pumping by a large RP.

The next step;
1) Start evacuation.
2) Check the penning gauges in HV (<10^-4 Torr).
3) Check the ionization pumps (IPs) in UHV (<10^-7 Torr).