JULIeT JULIeT ((JJava-based ava-based UUHE HE LLepton epton IIntnteegral gral TTransportransport

er)er)MotivationMotivationJava class structure Java class structure What you can doWhat you can doThe version 1.0 releaseThe version 1.0 release

Shigeru YoshidaShigeru YoshidaDept. of PhysicsDept. of Physics

CHIBA Univ.CHIBA Univ.

Bartol 2004

e

e

e/

e/

Weak

Weak

Weak

Inco

min

gProducts

Weak

Weak

Weak

Cascades

Cascades

Decay DecayWeak

Pair/decayBremss Pair Pair PhotoNucl.

PhotoNucl.DecayPair Pair

PairBremssDecay

DecayWeak

DecayDecayDecay

Bartol 2004

Tau(Neutrinos) from

Muon(Neutrinos) from

Nadir Angle

Structure of the JULIeT

Monte-Carlo Simulation

Numerical Calculation

Software Spec・ Propagation in the earth

・ Chain reactions ex.) →→→ ・・・ Save the CPU time

Treat andon the same footing

Solve the transport equations numerically

・ Energy Deposit in the detectorStochastic energy loss

Probability distribution

Monte-Carlo simulation

Interaction pointEnergy Deposit

Bartol 2004

Numerical Calculation modeNumerical Calculation mode

Bartol 2004

Upward-going Downward going!!

Bartol 2004

Angular Spectrum

1400 m

2800 m

11000mUp Down

IceCube EHE IceCube EHE Sensitivity Sensitivity

Published in Phys. Rev. DPublished in Phys. Rev. D S.Yoshida, R.Ishibashi, H,Miyamoto, PRD 69 (2004)S.Yoshida, R.Ishibashi, H,Miyamoto, PRD 69 (2004)

90% C.L. for 10 year observation

Bartol 2004

Monte Carlo modeMonte Carlo mode

Energy deposit profile in kmEnergy deposit profile in km33

By the JULIeT Monte Carlo functionBy the JULIeT Monte Carlo function

Bartol 2004

Version 1.0 releasedVersion 1.0 released

http://www.ppl.phys.chiba-u.jp/JULIeT/http://www.ppl.phys.chiba-u.jp/JULIeT/ The detailed USERS MANUAL availableThe detailed USERS MANUAL available The API Documents The API Documents The Swing-based GUI availableThe Swing-based GUI available Open for EVRYBODY. Visit our web site!Open for EVRYBODY. Visit our web site! Next step: Hook this up to the IceTray/PhotNext step: Hook this up to the IceTray/Phot

onicsonics

Backup SilidesBackup Silides

Laguna Beach 2003

The Whole Structure

Java_lib

sources

classes

icecube UHE

particles

points

interactions decay

propagation

numRecipes

Laguna Beach 2003

particles/

Defines particles with mass, lifetime, and energy

flavor

doublet

0

0

1

1 2 3

e

e 0

+

10 GeV < E < 10 GeV6 11(Initial. Changeable)

Particle.java ParticleArray.java

Laguna Beach 2003

points/ParticlePoint.java

•Define/calculate the point vector to trace particles•Define/calculate the medium(Rock/Ice) in which particles travel

density, mass number, charge, . . .

In Future. . .

Xxxx.javaTake the configuration of the Antarctica Ice

Laguna Beach 2003

interactions/

Interactions.java (abstract)•Total/differential cross sections•Integral differential cross sections•Integral inelasticity term

ddy y

Bremsstrahlung.java KnockOnElectrons.java

NeutrinoCharge.java NeurtinoNeutral.java PairCreation.java

InteractionsMatrix.javaGenerate matrix of (logE), d/dy(logE)

Wisconsin 2003

decay/Decay.java

Calculate weak decay matrixWl

MuDecayMatrix.java TauDecayMatrix.java

Wisconsin 2003

propagation/

PropagationMatrix.javaResolves the transport equation numerically

Build the transfer matrix for propagation overInfinitesimal distance dX[g/cm2], first

Wisconsin 2003

propagation/

PropagationMatrix.javaHas a function of switching on/off any interaction channel

bit6 bit5 bit4 bit3 bit2 bit1 bit0bit7

CCNCe+e-+-+-

Knock-onBremssPhoto-Nucl ->

Wisconsin 2003

numRecipes/

Integration.javaNumerical Integration Methods

• Extended Trapezoidal rule• Romberg Integration

Interpolation.javaPolynomial Interpolation

SpecialFunctions.javaGaussian, Poisson, Gamma Function etc..

RandomDouble.java

Uniform DeviatesBased on “Mersenne Twister”Period 2^19937-1 623 dimensional equi-distribution