Anyone doing work on millennium has probably wondered at one time or another
who is that user amanda, running something on almost all nodes sometimes for
several weeks in a row. Well, AMANDA stands for ... 1. Over the last couple of
years it has been one of the major users of the cluster.

As a short summary, ... 2 (1 sentence). On this slide you can see that the
detector consists of 19 strings with more than 600 Optical modules located in
the ice at depths from 1200 to 2300 meters. The main goal of the detector ...
2.

To simulate background, one needs to use the measured spectra of the cosmic
ray primaries to generate air showers (the CORSIKA step). The muons created
during air shower development are propagated through ice with Muon Monte Carlo
(MMC); and then the photons left by muons in the ice are propagated to the
detector, which is simulated with AMASIM ... 3.

I am going to skip over a couple of CORSIKA slides, and go straight to

MMC optimizations: ... On the first plot the red dashed line represents a
histogram obtained with the fully parametrized version of MMC and shows a
sharp dip at small energies. While one could think of the physical arguments
in favor of the dip, the exact version result obtained on millennium and shown
in blue solid line exhibits no such dip. Therefore this must have been due to
a loss of precision during interpolation step. It was fixed in the next
version of the program: as you can see both histograms follow each other at
all energies with no dips.

MMC has been a very successful project and has been reported about at the last
International Cosmic Ray Conference. Now it is the main muon propagator for
AMANDA and has been used for data processing in at least one other experiment
(Frejus) by our colleges from Germany.

Light in Ice: One of the main challenges in reproducing AMANDA data is
simulating light in ice. i... which allows muon to be recorded with optical
modules spaced as far as they are in AMANDA.

Several other projects are performed by our research group on millennium. One
of them is supposed to calculate the shear ice flow in the lower part of the
glacier which has been predicted to be measurable with AMANDA. Downgoing muon
tracks, reconstructed with the main body of AMANDA are tied by timing and
geometry considerations to the true positions of the lower optical modules in
AMANDA. Getting the locations of the lower optical modules over several years
will result in the determination of the ice flow with AMANDA.

Another project done on millennium relates to ...