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

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

Corsika Simulation 12 min. of Atmospheric Muons Production: Simulation V01-02-01 Reconstruction: IceRec V01-04-03 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

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: V01-04-03 Jon Dumm 4

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

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

Occupancy Jon Dumm 7

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

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

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

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

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

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

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

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

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

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

Black – Exp Red – MC Azimuth Distribution Jon Dumm 18

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

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