(Facility) Support - LCGT Handy Man -

1. (Facility) Support- LCGT Handy Man - • The definition of “Support” is now under construction. • Many missing-tasks will be delivered to the support group. • CCD monitor deliver  Circuit? • Scattered light control (IFO and Input optics)  IOP? • Local sensing of mirrors’ motion  Suspension? • Network • Etc… • Anyway, in 2010, the support group supports about mainly facility including… • Clean environment construction and rule • Power supply and HAM(60Hz) buster • Entrance System • Network LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

2. How to Make Clean Environment - Basic Policy - • Dry the area • Keep out dust • Not raise dust • Not collect dust • Avoid sound and vibration LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

3. Humidity Control Humidity kills IFO • Problems • Water from concrete walls and floors. • Water from side ditch. • Solutions for tunnel section • Baking after construction. But, no money and no time due to tight schedule ? • Dry coverage only around vacuum instruments. • Vacuum ducts taping with sheets.(but stainless steel) • Duct supports should be made of stainless steel ? or steel with corrosion control. • Solutions for Center , End station • Baking. LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

4. Dust Control Dust kills Optics • Problems • Dust from Outside (arm and entrance tunnels). • Dust from walls (blowing concrete) and floors. • Dust from people. • Solutions • Clean and dry air generation using outside fresh air.(Sound and vibration should be small.) • Keep a clean air flow from stations to outside. • Antistatic floor and wall painting, etc…. • Extra clean area around TM Tanks using deck structure. • Air shower system introduction and clothes policy. • Rules about instrument introduction. LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

5. Vibration and Sound Control No additional vibration and sound • Problems • Clean and Dry air Generator (CDG) makes large sound and vibration. • HEPA in the lab also makes sound and vibration. • Solutions • CDG is put as far as away from stations. • HEPAs are turned off during operation in stations • Small CDG in tunnels for vacuum stuff and electronics should be enclosed in some houses. LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

6. Clean Environment Ideal Plan 1 (Side view) (Top view) クレーン ２F １F 1000 Entrance Access Tunnel 10000 10000 Anterior room 1 Anterior room 2 Dry and clean air generation Anterior room Anterior room LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

7. Compromised Plan 1 by Tunnel Group LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

8. Power Supply • Problems • There is no ground earth in the tunnel. • According to experience, HAM (60Hz) spoiled IFO control and data quality a lot, unless it was minimized. • Ground loops due to cabling often troubles. • How supply power line for the end station ? (from center ? or individual?) • Solutions • 6000VAC(where is it set ?)  100VAC(where?)  24VDC. • 100VAC generation is isolated from lab area or not? If isolated, many commercial electronics should be modified. • 24VDC is delivered to each electronics? If so, Be careful with ground loops. • Ground copper bars will be set on walls in stations for ? • Never use switching regulators. • Battery is possible? LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

9. Entrance and Security System • Conditions and Requirements • The LCGT entrance is completely different with that for SK. • We should keep tabs on every worker inside the mine by ourselves. • We should make some rules (security, car usage, emergency contact) and do security education like SK. We should note especially security in 3km tunnel !! • “Emergency route”, “O2 monitor”, “fire-alarm box”, “surveillance monitors”, “air bottles”, “hand extinguisher”, etc… are required from the point of view of fire laws. • A security guard should come around. • Mobile PHS and commercial mobile phone around the entrance introduction. (We can scarcely use a mobile phone at Atotsu Entrance.) • Solutions • We should learn many things from SK group. • Can we ask SK to extend his system and a guard security for LCGT by cost sharing ? In the worst case, we should manual entrance check. • Ask a commercial company to build an antenna ? LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

10. Entrance and Security System • CLIO members and collaborators use this system. LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba

11. Network • Present Conditions & Requirements • Several 1G or 10G lines for SK area are ready, but we don’t know we can use one of them that are belong to SK group. • Mozumi UT -> SINET3 -> Kashiwa ICRR UT -> SINET3 -> Hongo UT -> WWW. • SINET3 -> SINET4 in March 2011, and • Because we have a plan to build a house at the new entrance for LCGT, should we have an individual line from Mozumi UT buildings? • How distribute the network to the end stations ? Because the Y-arm end around Mozumi can be directly provided from Mozumi UT building. Whereas, X-arm end should be provided from the center station? LCGT f2f meeting Sept 27 2010 @ Kashiwa, Chiba