1. Deployment Monitoring & Drill Logging (offline) at Pole Kurt Woschnagg IceCube collaboration meeting, Berkeley, March 2005

2. Drill logging in 04/05 season The plan –Monitor drilling, hole quality –Produce hole profile for string geometry What was done –Drill data transferred to public disk in 5 min chunks –Real-time logging analysis in North… Bob Morse, Varun Gopalakrishna at UW (Bob’s talk) Jack Ambuel, Bruce Koci, others Example: hole profile (x, y) –…and at Pole Cindy Mackenzie: data transfer KW: logging, analysis Communication: web, email, phone Example 1: web based drill depth/speed info (Steffen Richter) Example 2: caliper data for final go –Logging and analysis scripts run in both places Some more about

3. Hole profile (x, y) for geometry

4. From the archives: Actual plot used in final go/no-go decision Drilling (down) Ream (up) hole diameter [cm] depth [m]

5. Suggestions for Next Season Faster codes (perl instead of java) Integrate into drill monitoring …also keep independent –Crucial for cross-checks Define standard plots Define procedure & plots for hole hand-over Bob M to Pole!

6. Deployment Monitoring 1 60 59 dust logger Paro2 (pressure, temp) Paro1 (pressure, temp) 29 Keller (pressure) Thermistor (temp) Thermistors (temp) not read out during deployment 39 47 55 Readout (Data Deployment Box): Jack Ambuel, PSL Monitoring system (chucknet): Chuck Rentmeesters, UW Cables/breakouts/connectors: Jim Baccus, UW Harold Mattison, PSL Sensors: Michael Solarz, UCB Pole support: Mark Thoma Steffen Richter Data transfer: Cindy Mackenzie, UW 2435.8 m

7. Project Phase Transition Management- dense Physics dominated

8. Water Compressibility Correction The compressibility of pure water is tiny, κ 0 = 3.4456e-6 (PSI) -1 but not negligible in a 2500 m hole! Slightly higher for aerated water. Use depth difference between Paros to fit effective compressibility: κ = 3.78e-6 (PSI) -1 Then (after integration): depth[m] = C/(Dκ)·(exp(- κP 0 )-exp(- κP)) P,P 0 in PSI D = 0.99987 g/cm 3 ; C = 0.7030696 Not implemented in monitoring system, so final depth is 2435.8 m (not 2450.8)

10. Deployment Monitoring 1 60 59 29 39 47 55 Monitored during deployment: Depth (bottom DOM) from pressure sensors - Paro1 - Paro2 - Keller Pressure differences - Paro2-Paro1 - Paro2-Keller - Paro1-Keller Payout Drop speed Well depth (by hand, with laser ranger) Monitored during freeze-in: Pressures (x3) Temperatures (x3)

11. deployment drop Density of oil column changes with temperature Pressure build-up when hole closed off at OM – pressure release when water breaks through A typical Paro pressure profile in AMANDA Water frozen at Paro - Oil column volume fixed Freeze-in begins Total pressure release corresponds to change in density between water and ice

12. Freeze-in Monitoring 1 60 59 Paro2 (pressure, temp) Paro1 (pressure, temp) 29 Keller (pressure) Thermistor (temp) 39 47 55