1. Dust Logger stratigraphy studies
Ryan Bay
for
IceCube, Robert Rohde, Nathan Bramall

2. Hole 21 dust log

3. Improvements for Hole 50 More powerful laser Ruggedized
sapphire side port
Embedded Rabbit
CPU w/ feedback laser control
Dedicated
pressure sensor
DSL comms

4. 3-D South Pole stratigraphy
400 m

5. Hole 50 vs. Hole 21 Dust Logs

6. Hole 50 vs. Hole 21 Dust Logs

7. Hole 50 vs. Hole 21 Dust Logs

8. Hole 50 vs. Hole 21 Dust Logs

9. Hole 50 vs. Hole 21 Dust Logs

10. 3-D South Pole stratigraphy
Flow direction

11. A Deep Proposal Physics Motivation: Drill one hole down to 2700 m58
A Deep Proposal 59
Drill one hole down to 2700 m
Dust logger on extension cable
Physics Motivation:
Map ice properties below array
Ice flow (shear) modeling
2450 60
Disp. DL
weights
2700
2820

13. Square-wave impurity layer MC input
Timing distribution fitting powerful, not perfect
Square-wave impurity layer MC input e
Fit results a

16. Enfolded debris from bedrock?

17. A reusable dust logger Modify DL to work on caliper winch
Log prior to deployment (~4 hrs)
Advantages:
Higher data quality
Duplicate logs of each hole
Saves $$$
Standby use as needed based on:
- position in array
- hole quality
- radar profiles
- convenience