Difference between revisions of "Libisis and Homer algorithms"
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| − | A neutron detection instrument we are talking about (e.g. [http://www.isis.rl.ac.uk/Excitations/merlin/]) consists of number of long helium filled tubes with a wire passing through their center. High voltage is applied between the tube and the central wire which makes the system as a long | + | A neutron detection instrument we are talking about (e.g. [http://www.isis.rl.ac.uk/Excitations/merlin/]) consists of number of long helium filled tubes with a wire passing through their center. High voltage is applied between the tube and the central wire which makes the system as a long [http://en.wikipedia.org/wiki/Geiger_counter Geiger counter], sensitive to a neutron arrival. The electronics connected to the tube measures resistivity between the tube and the central wire and can establish the position of the neutron caused discharge by calculating the ratio of the resistivities between two parts of the tube around the discharge. |
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| + | * file "Spectra.dat" is located on data acquisition electronics maps physical detectors to "spectrum" 4-1 mapping because of the electronics limitations (balance between time resolution and the spacial resolution). Processed by hardware. Its influence to the data in the number of spatial and temporal channels. | ||
| + | * file "Detector.dat" provides physical position of the detectors on the instrument. Detectors are recognized by their label. Libisis uses it to restore real position of the detectors from their label | ||
| + | * "mask file" is created by Libisis diagnose function and used to | ||
Revision as of 13:19, 13 June 2009
Instrument operations and the description of the data processing algorithm
This page is under construction 
A neutron detection instrument we are talking about (e.g. [1]) consists of number of long helium filled tubes with a wire passing through their center. High voltage is applied between the tube and the central wire which makes the system as a long Geiger counter, sensitive to a neutron arrival. The electronics connected to the tube measures resistivity between the tube and the central wire and can establish the position of the neutron caused discharge by calculating the ratio of the resistivities between two parts of the tube around the discharge.
- file "Spectra.dat" is located on data acquisition electronics maps physical detectors to "spectrum" 4-1 mapping because of the electronics limitations (balance between time resolution and the spacial resolution). Processed by hardware. Its influence to the data in the number of spatial and temporal channels.
- file "Detector.dat" provides physical position of the detectors on the instrument. Detectors are recognized by their label. Libisis uses it to restore real position of the detectors from their label
- "mask file" is created by Libisis diagnose function and used to