Fluxes for the NuMI Beam
Flux tables
The flux tables listed here use a common format and set of units. The
format is a list of 7 columns. The first column is the neutrino energy
at the center of the bin in units of GeV. The 6 remaining columns are
the nue, numu, nutau, nue-bar, numu-bar, nutau-bar fluxes in units of
neutrinos/cm^2/1e20POT/bin. The bin size is 50 MeV and the tables
contain 1000 bins from 0 to 50 GeV.
For specific sites...
I have tables for several sites calculated in detail. They are:
|
| Site |
Beam tunes |
Location |
|
| Ash River |
ME
[ gif,
eps]
|
ME-REV
[ gif,
eps]
|
LE
[ gif,
eps]
|
LE-REV
[ gif,
eps]
|
(11.8,810) km |
| NuMI Surface Building |
ME
[ gif,
eps]
|
ME-REV
[ gif,
eps]
|
LE
[ gif,
eps]
|
LE-REV
[ gif,
eps]
|
(-11,97,911) m |
|
Under ground near detector location (station 38+50)
|
ME
[ gif,
eps]
|
ME-REV
[ gif,
eps]
|
LE
[ gif,
eps]
|
LE-REV
[ gif,
eps]
|
(-8,-5,967) m |
|
The beam tunes are the NuMI low energy (LE) and medium energy (ME)
tunes. If the beam is configured for anti-neutrino runing, I've
appended a "REV" to these. One should assume that NuMI will run in LE
mode until roughly the start of NOvA in 2011, and then switch to the
ME beam at that time.
For general sites...
I've created a tool to produce fluxes for general sites. Based on some
spot checks, it produces fluxes that are accurate to about 10%
compared to the more detailed calculations. The interpolation assumes
that the sites are distant enough from Fermilab such that the beam
line can be approximated as a point source. If the site you are
interested in is closer than ~100 km, you will probably want me
to calculate it for you in detail.
To use the pre-calculated tables follow these steps:
- Download the flux tables from here
- Unzip the file in the desired directory:
% gunzip numi-fluxes.tar.gz
% tar xfv numi-fluxes.tar
- Set an environment variable to point to the directory you just
created:
% setenv NUMI_FLUX_DIR ${PWD}/numi-fluxes
- Download the source code from here and
follow the instructions in the header comment to compile and run it.
Mon May 15 14:04:56 EDT 2006
messier@indiana.edu
