1. Preliminary Comparison of Monte Carlo and 9-string IceCube Data
Jon Dumm,
Paolo Desiati
IceCube Collaboration Meeting
Baton Rouge – April 2006 1

2. Comparisons Outline Lower level – the basics
Trigger rates, Occupancy, Hit Doms (LC), and Hit Strings (LC)
Higher level – the reconstructions
line fit, direct walk, muon-llh, wf-llh
Jon Dumm 2

3. Corsika Simulation 12 min. of Atmospheric Muons
Production: Simulation V
Reconstruction: IceRec V
Hard Local Coincidence Nearest Neighbor DOM within ±800 ns (HLC NN DOM)
Trigger-sim
Majority Trigger - Events with >= 8 DOMs with LC in 2 µs
Feature Extractor
Jon Dumm 3

4. Experimental Data TestDAQ run 28696 from March 8th, 2006
Majority trigger ( >= 8 DOMs with LC in 2 µs)
Trigger rate around 120 Hz
Feature Extractor
Reconstruction: V
Jon Dumm 4

5. Trigger Rates MC trigger rate is about 4 times too high
Issues with Real vs Test DAQ which have to be solved
Jon Dumm 5

6. Occupancy Photonics layered table with bin sizes: 80 m in depth
60 deg in zenith angle
Occupancy
Black – Exp
Red – MC
DOM 1 at depth 1440 m
DOM 60 at depth 2440 m
Jon Dumm 6

7. Occupancy
Jon Dumm 7

8. Number of Hit DOMs Black – Exp Red – MC (DOM + LC)
Blue – MC (all DOMs)
Is anything important being thrown away due to LC?
Jon Dumm 8

9. Number of Hit Strings Black – Exp Red – MC (DOM + LC)
Blue – MC (all DOMs)
Jon Dumm 9

10. Reco Hits – (reconstructed by Feature Extractor )
Black – Exp
Red – MC
Agreement looks fine in this range...
Jon Dumm 10

11. Reco Hits – (MC only)
No Exp counterpart
Jon Dumm 11

12. Higher Level Muon-llh Wf-llh uses Pandel likelihood function
uses Feature Extractor
Wf-llh
uses photonics tables
independent of Feature Extractor
Jon Dumm 12

13. Angular Resolution (MC only)
Black – muon-llh
Red – wf-llh
Angular Resolution (MC only)
LF seed
no cuts
DW seed
no cuts
LF seed
nstring>1
DW seed
nstring>1
Space Angle Difference (deg)
Jon Dumm 13

14. Angular Resolution (MC only)
Quality cuts: Ldir >100; abs(smoothness)< 0.3
Black – wf-llh
Magenta – muon-llh
Courtesy of Sean Grullon
Space Angle Difference (deg)
Jon Dumm 14

15. Zenith Distribution – MC Truth
theta (deg)
Jon Dumm 15

16. Zenith Distribution – muon-llh
Black – nstring >1 cut
Red – no cuts
Zenith Distribution – muon-llh
LF Seed
DW Seed
MC ->
LF Seed
DW Seed
Exp ->
theta (deg)
Jon Dumm 16

17. Zenith Distribution – wf-llh
Black – nstring >1 cut
Red – no cuts
Zenith Distribution – wf-llh
DW Seed
LF Seed
MC ->
LF Seed
DW Seed
Exp ->
theta (deg)
Jon Dumm 17

18. Black – Exp
Red – MC
Azimuth Distribution
Jon Dumm 18

19. Number of Direct Hits
Black – Exp
Red – MC
ndir
Jon Dumm 19

20. Outlook – lots more to look at!
Basic checks before doing physics
other quality parameters (Ldir, Smoothness)
integrated charge of the waveform
Trigger rate issues
DCV2
Jon Dumm 20