1. 04/05 IceTop schedule * Power required ** Water required Dec 1 Dec 10 Dec 20 Jan 6 Connect to TCH Fill tanks Jan 20 Feb 3 Backfill Cover tanks Run DOMs Evenson 11/30 – 12/28 Gaisser 11/26-12/14 Tilav 1/12 – 1/27 Roth 11/26-12/19 Jamesway SMURF TCH

2. IceTop Station and Surface Junction Box Interface to IceCube System 24VDC +/-48VDC Freeze Controller Temporary Smurf Cables 2 +/-48VDC Cables 1 RS485 Data Cable Surface Cable from Counting House Surface to DOM Cable From Hole Surface Junction Box IceTop Excavation NOTES: 1. Drawing is in approximate relative scale. 2. Tanks are 10 meters between centers. 3. DOM cables are 17 meters long. 4. RS485 Master source is controlled by plugging in the desired data cable. 5. Tank power source is controlled by plugging in desired power cable. 6. Power Converter contains +/-48VDC to 24VDC converter and EMI filter. George Anderson Sept 17, 2004 File Rev F Power Converter (green box)

3. BA C Tank positioning J Cable trench to counting house A = Tank A B = Tank B C = String/hole J = Junction box Distance AC=BC=25±5 m Distance AB = 10±0.5m Tank trench: Ramp-down access from both sides; constant depth between A and B Excess cable: Anywhere between A and B, 1.5 m clearance to tanks To be buried at trench level. Junction box: located between the tanks, exact location TBD on the ice. Not to scale

5. BA C Freeze-control cables from SMURF until TCH available J Cable trench to counting house A = Tank A B = Tank B C = String/hole J = Junction box Distance AC=BC=25±5 m Distance AB = 10±0.5m Tank trench: Ramp-down access from both sides; constant depth between A and B Excess cable: Anywhere between A and B, 1.5 m clearance to tanks To be buried at trench level. Junction box: located between the tanks, exact location TBD on the ice.

6. Nominal layout of IceTop Minimize deviations from nominal 125 m grid

7. Station configurations for 04/05