1. Status of HO Installation Shashi Dugad Tata Institute of Fundamental Research India-CMS Collaboration Meeting, Chandigar 05-06 April 2007

2. Progress and plans in nutshell... ● Surface installation activity restarted after X-mas ● Installation of all 5 Rings is more or less completed ● We should start working towards commissioning of each of Ring

3. Mechanical Installation of HO ● Burning and installation of RBXes ● Making and routing Signal Cable Bundles ● Routing HV, LV, DCS and DSS Cables ● Laying megatile cables between RBX and trays ● Assembling and installation of optical patch panel ● Installation and assembly of LV and DCS patch panel

4. Status of Mechanical Commissioning ● Mechanical Installation on all 5 Rings is almost completed ● Few remaining activities – Installation of YB-1 S10 RBX in June – Installation of YB-2 S12 RBX with SiPM (after Aug2007?) – Installation of optical patch panel and DCS Hub for YB-1 and YB-2 – Making and laying of LV cable for 2 sectors on YB-1 (in June-2007)

5. Commissioning of HO ● This activity can be taken up after YB-1 and YB-2 are lowered (in June07) ● Cabling (Signal, Calibration, TTC etc.) of YB0 – Scheduled in July07 ● Laying HV and signal cable bundle from counting room to the cavern (to be done by central team). ● Powering up HV, LV and DAQ system for HO ● Taking ped. and calibration data ● Debugging all hardware problems with the help of this data

6. Action plan ● Mechanical installation in concluding phase ● HO commissioning can start in early June – We should make our plans accordingly