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Data-Analysis Software

 

Several software packages are currently available for the analysis and simulation of experimental data.

land02

Contact person: Ralf Plag

land02 is a collection of programs for the calibration of the electronics and the reconstruction of hits in terms of position in cm, energy loss in MeV and time in ns. Starting from the raw data stored in lmd files, the various programs analyse either physics data and write the reconstructed hit data into root trees. Or they analyse calibration and cosmic data which is automatically taken in the few-seconds breaks between adjacent beam pulses (spills) and produce calibration parameters for the subsequent analysis of physics data. This way a continous calibration over the whole duration of the experiment is guaranteed.
land02 also provides track information for neutrons and the incoming particle (before the reaction).

More information can be found here.

 

UCESB unpacker - Bridging the gap between DAQ systems and data analysis tools

Contact person: Hakan T. Johanson

This system helps unpacking event-wise experimental data from e.g. nuclear physics experiments, and provide easy access to the various data members, in form of hbook ntuple files, root trees, or plain C structures in any program via the network, but also in user functions or for quick viewing from the command line. The work is done as a part of Swedish in-kind contribution to FAIR.

More details can be found here.

 

r3broot

Contact person: Dmytro Kresan

R3BRoot is a software framework developed at GSI, used for simulations and data analysis of R3B experiments. It inherits basic framework functionality from FairRoot, extending it with R3B-specific detectors and algorithms implementation. R3BRoot has a modular design with shared libraries, which are loaded on demand. The simulation part is based on the Virtual Monte Carlo (VMC) concept. For the description of detector geometry and input for the simulation, multiple formats are supported. It also includes parameter handling, event display, etc.

More information can be found here.

 

Tracker

Contact person: Ralf Plag

In order to determine the complete kinematics of a reaction, the "tracker"
determines particle type and three momentum of all outgoing charged particles.
While the charge of the particles is directly measured via energy loss, the mass is reconstructed via a measurement of B*rho using the deflection of the particle in the dipole magnet.
This analysis requires a precise knowledge of the (non uniform) magnetic field inside and outside the magnet which was measured for the Aladin magnet along all three coordinate axis on 10-thousends of grid points for different field intensities.
Since the new Glad magnet is an Iron-free super conducting magnet, the field can be calculated from the layout of the coils.

More details can be found here.

The figure shows the tracks reconstructed from several 17Ne(g,2p)15O-reactions.
fileadmin/_migrated/pics/ne17-tracked.png
The figure shows the tracks reconstructed from several 17Ne(g,2p)15O-reactions.
The figure shows the tracks reconstructed from several 17Ne(g,2p)15O-reactions.