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32-strip detector and electronic system for fission products registration at mass spectrometer
1) Koblik Yu.N., 1) Nam I.V., 1)Nebesniy A.F., 1)Pikul V.P.,
2)Zamiatin N.I., 3) Ioannou P., 4)Loukas D.
1) Institute of Nuclear Physics, 100214, Tashkent, Uzbekistan.
2) Joint Institute for nuclear Research, Dubna, Russia.
3) University of Athens, Nuclear section, Athens, Greece.
4) Institute of Nuclear Physics, Athens, Greece
Electronic system for fission products (FP) registration at mass spectrometer was designed and developed based on 32-strip silicon detector, 32 charge-sensitive amplifiers (working in vacuum) and 32 pulse analyzers of 1024 channels at microcontrollers. Detector contains 32 1.8 mm width strips each at the interface with 60x60 mm area and 300 micron thickness. Detector is placed in a focal plane of magnetic mass-spectrometer and 32 charge-sensitive amplifiers are placed nearby. Pulse analyzers due to microcontrollers allow accumulation of information about quantity and energy of fission products from each strip.
Pulse analyzers are constructed in the separate unit. There are 8 modules with 4 pulse analyzers (PA-4) in each, connected to the control module. Each input of PA-4 receives the signal from appropriate strip and control module transmits data from all of the PA-4 to the host-computer by the driver RS485-USB.
System was calibrated by various α sources and tested by using 252Cf source for all 32 channels.
The analysis of FP nuclei formed under the reactor neutrons was carried out. Based on the FP spectra, registered in spectrometric channels of separate strips, their kinetic energies Eki and corresponding event numbers were defined.
