1. EHE MC Check K. Mase* on behalf of EHE penguins, Chiba university*

2. Collaboration Meeting Oxford Keiichi Mase ■ Simulated condition @ Chiba  Muons are simulated with JULIeT.  JULIeT → photonics → ROMEO → DOM simulator and calibrator → weighting- module  6 < log 10 E < 9 [GeV]  dF/dE = E -1  The direction is uniform (default)  The position is uniform within 880 m radius.  The interaction of pair creation, brems. and photo-nuclear, and the decay is switched on. (default)  bulk ice photonics table ■ The purpose of this study  To check the MC for the Extremely High Energy (EHE) nutrinos (muons). ■ Test data  generated at Madison (Aya, Paolo) and Chiba (Keiichi, Shigeru)

3. 10 16 eV10 15 eV 10 19 eV10 18 eV10 20 eV 10 17 eV

4. Collaboration Meeting Oxford Keiichi Mase ■ Primary Particle Log 10 (Primary energy) [GeV] cos(theta) [rad.] # ## Azimuth [rad.]  This is fine!

5. Collaboration Meeting Oxford Keiichi Mase ■ The highest energy cascade along a muon track X [m] Log 10 (Primary energy) [GeV] ## ## Z [m] Y [m]

6. Collaboration Meeting Oxford Keiichi Mase ■ The highest energy cascade along a muon track Log 10 (Primary energy) [GeV] Log 10 (highest cascade energy) Pair creation+brems.+photo-nuclear Only pair creation

7. Collaboration Meeting Oxford Keiichi Mase ■ The z position of the highest energy cascade upgoing uniform downgoing  Strange  even only pair creation case  Need debug

8. Collaboration Meeting Oxford Keiichi Mase Log 10 (Primary energy) [GeV] Log 10 (dF/dLog 10 E) [/cm 2 /s/sr] downgoing Log 10 (Primary energy) [GeV] Log 10 (dF/dLog 10 E) [/cm 2 /s/sr] upgoing ■ Weight module for JULIeT (Aya) JULIeT numerical calc. Log 10 (Simulated Flux) [/cm 2 /sr] Log 10 (Primary energy) [GeV] upgoing Log 10 (Primary energy) [GeV] Log 10 (Simulated Flux) [/cm 2 /sr] downgoing Simulated flux → weight

9. Collaboration Meeting Oxford Keiichi Mase ■ Detector response Log 10 (Primary energy) [GeV] log 10 (Total Np.e.) log 10 (OM Hits) Log 10 (Primary energy) [GeV]  There are correlation.

10. Collaboration Meeting Oxford Keiichi Mase ■ Consuming time  It takes too much time for high energy (log 10 E > 9 GeV). Only 1 big event  Xeon 2.4GHz  Used Project I3DefaultPhysicsSource I3DefaultDetectorStatusSource I3DefaultCalibrationSource I3TextFileGeometrySource I3MCCalibrationFiller I3MCRawDOMStatusFiller I3CalibrateStatusModule I3JulietPrimaryParticleSource I3Juliet I3HitConstructor I3NoiseGeneratorModule I3RomeoInterfaceModule I3DOMsimulator I3DOMcalibrator I3BoostPhysicsWriter I3BoostGeometryWriter I3BoostCalibrationWriter Averaged over 100 events Acceptable level (1000 events/week) 5.36 s/event 289 s/event 501 s/event 383 s/event +284 +94 +118 ← 1 hour

11. Collaboration Meeting Oxford Keiichi Mase ■ Summary and future plan  The MC software to study EHE neutrinos are almost ready.  However, there are several problems.  strange distribution of the maximum cascade z position  It takes too much time to simulate high energy events (log 10 E > 9 GeV).  Other parameters and the waveform should be checked.  We will start mass production of MC events after fixing the above problems.  We will develop a reconstruction method for the EHE neutrino events.

12. Collaboration Meeting Oxford Keiichi Mase Backup

13. Collaboration Meeting Oxford Keiichi Mase ■ Technical problem  When I run large number of events, I got a error. > private/dataclasses/I3DOMCalibration.cxx:84 Invalid ATWD channel in I3DOMCalibration > private/root-icetray/RootI3Tray.cxx:443 Invalid ATWD channel in I3DOMCalibration > private/root-icetray/RootI3Tray.cxx:457 Fatal exception caught: Invalid ATWD channel in I3DOMCalibration

14. Collaboration Meeting Oxford Keiichi Mase Neutrino-Induced Cascades: Signature of  e and  are hadronic and electro-magnetic cascades. Neutral Current interactions of all neutrino flavors produce hadronic cascades Background consists of atmospheric muons, emitting energetic secondaries S Signal and Background ~ 5 m

15. Collaboration Meeting Oxford Keiichi Mase Bartol 2004 Angular Spectrum 1400 m 2800 m 11000m UpDown

16. Collaboration Meeting Oxford Keiichi Mase Events in Energy-direction plane By Monte Carlo GZK domain Atm  domain

17. Collaboration Meeting Oxford Keiichi Mase Energy deposit profile in km 3 By the JULIeT Monte Carlo function

18. Collaboration Meeting Oxford Keiichi Mase IceCube EHE Sensitivity 90% C.L. for 10 year observation

19. Collaboration Meeting Oxford Keiichi Mase Particle identification IceCube Solid: particle ID, direction, and energy Shaded: energy only (Supernova detection)

20. Collaboration Meeting Oxford Keiichi Mase ■ Software for EHE neutrinos JULIeT Photonics ROMEODOM Sim EHE propagator Cherenkov Detector Electronics  2D absolute sensitivity included  saturation included  Speed improved → need more. Now, the software is almost ready.

21. Collaboration Meeting Oxford Keiichi Mase ■ Consuming time  It takes too much time for high energy (log 10 E > 9 GeV). Only 1 big event  Xeon 2.4GHz  Used Project I3DefaultPhysicsSource I3DefaultDetectorStatusSource I3DefaultCalibrationSource I3TextFileGeometrySource I3MCCalibrationFiller I3MCRawDOMStatusFiller I3CalibrateStatusModule I3JulietPrimaryParticleSource I3Juliet I3HitConstructor I3NoiseGeneratorModule I3RomeoInterfaceModule I3DOMsimulator I3DOMcalibrator I3BoostPhysicsWriter I3BoostGeometryWriter I3BoostCalibrationWriter 100 events 21.45s/4events 1154s/4events 2003s/4events 3015s/4events 1533s/4events

22. Collaboration Meeting Oxford Keiichi Mase amanda-core http://code.icecube.wisc.edu/svn/projects/amanda-core/releases/V01-00-02 dataclasses http://code.icecube.wisc.edu/svn/projects/dataclasses/releases/V01-08-02 dataio http://code.icecube.wisc.edu/svn/projects/dataio/releases/V02-00-01 examples-offline http://code.icecube.wisc.edu/svn/projects/examples-offline/releases/V01-04-01 icetray http://code.icecube.wisc.edu/svn/projects/icetray/releases/V01-05-01 offline-mk http://code.icecube.wisc.edu/svn/projects/offline-mk/releases/V01-06-01 phys-services http://code.icecube.wisc.edu/svn/projects/phys-services/releases/V01-07-01 root-icetray http://code.icecube.wisc.edu/svn/projects/root-icetray/releases/V01-05-00 ithon http://code.icecube.wisc.edu/svn/projects/ithon/releases/V01-00-01 eventviewer http://code.icecube.wisc.edu/svn/projects/eventviewer/releases/V01-05-00 eventviewer-modules http://code.icecube.wisc.edu/svn/projects/eventviewer-modules/releases/V01-05-00 I3Db http://code.icecube.wisc.edu/svn/projects/I3Db/releases/V01-04-01 analysis-tree http://code.icecube.wisc.edu/svn/projects/analysis-tree/releases/V02-03-00 monolith-reader http://code.icecube.wisc.edu/svn/projects/monolith-reader/releases/V02-00-02 triggerUtil-C++ http://code.icecube.wisc.edu/svn/projects/triggerUtil-C++/releases/V00-01-03 DOMcalibrator http://code.icecube.wisc.edu/svn/projects/DOMcalibrator/releases/V01-00-01/ ICETRAY-APP http://code.icecube.wisc.edu/svn/projects/ICETRAY-APP/releases/V01-05-00 OFFLINE-SOFTWARE http://code.icecube.wisc.edu/svn/projects/OFFLINE-SOFTWARE/releases/V01-06-03 DOMsimulator http://code.icecube.wisc.edu/svn/projects/DOMsimulator/releases/V01-02-01 PSInterface http://code.icecube.wisc.edu/svn/sandbox/ehe_sandbox/PSInterface c2j-icetray http://code.icecube.wisc.edu/svn/projects/c2j-icetray/releases/V02-01-01 corsika++ http://code.icecube.wisc.edu/svn/projects/corsika++/releases/V01-05-02 hit-constructor http://code.icecube.wisc.edu/svn/sandbox/ehe_sandbox/hit-constructor mmc http://code.icecube.wisc.edu/svn/projects/mmc/releases/V00-02-04 mmc-icetray http://code.icecube.wisc.edu/svn/projects/mmc-icetray/releases/V01-01-01 noise-generator http://code.icecube.wisc.edu/svn/projects/noise-generator/releases/V00-01-00 romeo http://code.icecube.wisc.edu/svn/projects/romeo/trunk romeo-amanda http://code.icecube.wisc.edu/svn/projects/romeo-amanda/releases/V00-00-04 romeo-interface http://code.icecube.wisc.edu/svn/projects/romeo-interface/trunk i3anis http://code.icecube.wisc.edu/svn/projects/i3anis/releases/V00-00-02 simple-muon http://code.icecube.wisc.edu/svn/projects/simple-muon/releases/V00-00-02/ juliet http://code.icecube.wisc.edu/svn/projects/juliet/trunk juliet-interface http://code.icecube.wisc.edu/svn/projects/juliet-interface/trunk ucr-icetray http://code.icecube.wisc.edu/svn/projects/ucr-icetray/releases/V00-01-00/ TWRSimulator http://code.icecube.wisc.edu/svn/projects/TWRSimulator/releases/V00-00-02/ cascade-generator http://code.icecube.wisc.edu/svn/projects/cascade-generator/releases/V00-00-01/ examples-simulation http://code.icecube.wisc.edu/svn/projects/examples-simulation/releases/V00-10-00/ topsim http://code.icecube.wisc.edu/svn/projects/topsim/releases/V00-00-01/ weighting-module http://code.icecube.wisc.edu/svn/sandbox/weighting-module FeatureExtractor http://code.icecube.wisc.edu/svn/projects/FeatureExtractor/trunk atmo-flux http://code.icecube.wisc.edu/svn/sandbox/atmo-flux fat-reader http://code.icecube.wisc.edu/svn/projects/fat-reader/trunk