G. Battistoni, A. Ferrari, C. Pardiin collaboration with LNGS/Aq group

Some progress in the light production/transport simulation

in ICARUS using FLUKA

Reproduce some muon data from actual data(both with “vertical” and “horizontal” trigger)

with and without Rayleigh scattering

Usual conditions:

no reflection from cathode 128

cathode holes at 60%

24000 photons/MeV @ 128 nm

no detailed PMT eff.

Comparison with data

run 649minimal distance (cm)

AD

C c

ount

s

pmt#1 pmt#2 pmt#3 pmt#4

phot

ons

From last J. Lagoda presentation:

“Vertical” muons

This work: Reproducing muons from Run 649 (reconstruction got from J. Lagoda + LNGS people)

“Vertical” Muons

No Rayleigh Rayleighwith = 90 cm

Comparison with data

run 781

AD

C c

ount

s

minimal distance (cm)

pmt#1 pmt#2 pmt#3 pmt#4

phot

ons

“Horizontal” muons

This work: Reproducing muons from Run 781

No Rayleigh Rayleighwith = 90 cm

“Horizontal” Muons

Remarks

Introducing Rayleigh scattering increases the slope inthe plot of Npho vs distance from PMT

Slope of ADC counts vs distance from PMT in real datais closer to the case of no Rayleigh Scattering (~as in first LNGS simulation)

But R.Sc. must be there ! (plus maybe some absorption)

So what is missing?

Are there any saturation in PMT pulses in real data?NOT IN THESE RUNS (Selected events)

Some news about FLUKA

Since Feb 19th there exists a scientific agreement between

INFN, CERN (EP and AB divisions) and FLUKA authors

to develop maintain and distribute FLUKA to HEP community

Main milestone:a full release within 18 months

with a proper licence(already a milestone of INFN Gr.V)

A Beginner's course

My idea and intention is still valid (delayed due to FLUKA issues and work on T600 paper)

LNGS agrees to host a FLUKA course provided it is general and not only for ICARUS.

This is not a problem

Project: 3 days, including examples dedicated to underground physics plus a dedicated appendix to specific Icarus library and cases

When: we cannot think of it before CHEP-2003 (end of March) most likely April or May