I3PropagatorMMC module

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I3PropagatorMMC module

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based on jni (sun's java native interface) ... jre initialization is handled by c2j-icetray, which is an independent project ... – PowerPoint PPT presentation

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Title: I3PropagatorMMC module

1
I3PropagatorMMC module
Dmitry Chirkin, LBNL
IceCube meeting, Uppsala, 2004
2
I3PropagatorMMC module status

V01-00-00
bfd co -r V00-02-00 mmc
bfd co -r V01-00-00 mmc-icetray
cvs co -D '2004-09-01' c2j-icetray
add log4cxx to USES_TOOLS

Files of mmc-icetray V00-01-01
private/mmc/I3PropagatorMMC.cxx
public/mmc/I3PropagatorMMC.h
New files of mmc-icetray V01-00-00
public/mmc/I3MMCTrack.h
public/mmc/I3MMCCompositeTrack.h

mmc V00-02-00 is based on mmc release 1.3.2,
which is contained within the src/ directory
3
mmc package

MMC V00-02-00
based on mmc version 1.3.2
the sources and compiled mmc.jar archive are
exactly the same as used for AMANDA therefore
bug fixes for AMANDA become immediately available
for IceCube.
based on jni (suns java native interface)
version of jni libraries must match version of
header files (check LD_LIBRARY_PATH).
jre initialization is handled by c2j-icetray,
which is an independent project maintained by
Simon.
In addition to compiling with ant, the mmc.jar
archive can be compiled by running ammc ca
from the src/ directory.
Parameterization tables and mediadef
configuration file are/should be placed in the
resources/ directory of the mmc-icetray package.

4
mmc-icetray package

most of the private routines of
I3PropagatorMMC.cxx,h are based on functions of
i3module.c,h of the i3m (native interface)
package of mmc.
to avoid Fortran code compilation (CTEQ PDF
parameterization is a Fortran code which is used
by MMC for the calculation of neutrino cross
sections), the pre-calculated parameterization
table file .cteqPDF_raw.data file (48239 bytes)
is placed in the resources/ directory. This file
will need to be updated when the new version of
CTEQ PDF parameterization becomes available.
mmc-specific modules
libjvm.so
lib2cj-icetray.so
libmmc-icetray.so
must be loaded at the beginning of your root
script.

5
mmc-icetray V01-00-00 functionality

for each IceTop lepton of the event (except e
and e-), copies it into an InIce particle of the
I3MMCCompositeI3MCTrack
type.
This primary particle, together with all
additional secondaries are added to the
I3MMCComposite track as
I3MCCascade (cascades),
I3MCTrack (neutrinos), or
I3MMCTrackI3MCTrack
(muons and taus) types.

6
I3PropagatorMMC parameters
/ mmc_mode1 propagate muons or taus only
mmc_mode2 use as phenomenological event
generator mmc_mode3 propagate all leptons,
not just muons or taus mmc_modelt0 output
debugging (extra) info / int mmc_mode-2 tray.Se
tParameter("propagate","mode", mmc_mode) tray.Set
Parameter("propagate","opts", "") / Linking up
inboxes to outboxes /

if(mmc_mode2 mmc_mode-2) // using MMC
as event generator tray.ConnectBoxes("source",
"OutBox", "propagate") else // using
CORSIKA as event generator tray.ConnectBoxes("so
urce", "OutBox", "corsika") tray.ConnectBoxes("
corsika","OutBox","propagate")
7
Conclusions

I3 Propagator module I3PropagatorMMC is
basically an interface to the mmc package, which
is identical for AMANDA and IceCube.
It has been updated for DATACLASS-APP V01-00-00
and tracks have been structured using the
Composite Track functionality.
Two new classes derived from I3MCTrack have been
added to mmc-icetray. They allow to record extra
information such as the total energy deposited
inside the detector cylinder and energy of the
muons and taus at the entry and exit points
to/from this cylinder (what is known as USER info
in AMANDA lines mmc_en and mmc_et).
I3PropagatorMMC module can be used not only as a
muon/tau propagator, but also an atmospheric/E-g
muon and muon- and electron neutrino generator,
thus potentially simplifying development.
I3PropagatorMMC is the first neutrino generator
implemented in IceCube simulation software.
Most of the mmc options (listed with opts-h)
can be set through the parameter opts of your
root script.