We present the results of tuning and calibration of the detector electronics in the signal digitization mode. The goal of the experiment is to search for a possible sterile neutrino signature in ...tritium beta-decay. The read-out electronics work in direct oscilloscope mode, which requires to optimize time frame the with the goal to minimize noise and energy resolution. We use a 7-pixel silicon drift detector (SDD) and a CMOS charge sensitive preamplifier with very low integration capacitor. Amplifier forms a slowly rising output shape and operates in pulse-reset mode. The 125 MHz ADC digitizes the signals. Using calibration data from Fe
55
and Am
241
gamma sources we check triangular and trapezoid digital filters to obtain the best noise and energy resolution performance. We are also examining the option to differentiate the output signal.
The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at - 18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise ...high-voltage dividers were developed and built in cooperation with the German national metrology institute Physikalisch-Technische Bundesanstalt (PTB). Until now, regular absolute calibration of the voltage dividers required bringing the equipment to the specialised metrology laboratory. Here we present a new method based on measuring the energy difference of two Formula omittedKr conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN's commissioning measurements in July 2017. The measured scale factor Formula omitted of the high-voltage divider K35 is in agreement with the last PTB calibration 4 years ago. This result demonstrates the utility of the calibration method, as well as the long-term stability of the voltage divider.
A detector for detection of beta-decay electrons in experiments on recording of a signal of sterile neutrinos is searched for. A set of parameters indicates that an avalanche silicon precision ...detector is a promising detector that allows electron counting rates of up to 2.5 × 10
7
s
–1
for an active area of 0.785 mm
2
at room temperature with a possibility of spectrometric detection.
Light ion beams for ADS energy production Baldin, A. A.; Berlev, A. I.; Paraipan, M. ...
EPJ Web of Conferences,
01/2017, Letnik:
138
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
The comparative analysis and optimization of the energy efficiency for proton and ion beams in ADS systems is performed via GEANT4 simulation with account of energy consumption for different ...accelerator types. It is demonstrated that for light nuclei, beginning from 7Li, with energies above 1 GeV/nucleon ion beams are substantially more efficient than 1–3 GeV proton beams.
A comparative analysis and optimization of energy efficiency for proton and ion beams in ADS systems is performed via simulation using a GEANT4 code with account for energy consumption for different ...accelerator types. It is demonstrated that for light nuclei, beginning from
7
Li, with energies above 1 GeV/nucleon, ion beams are considerably (several times) more efficient than the 1–3 GeV proton beam. The possibility of achieving energy deposition equivalent to 1 GeV protons in a quasi-infinite uranium target with higher efficiency (and twice as small accelerator size) in the case of acceleration of light ions is substantiated.
Results of the “Troitsk
ν-mass” experiment on the search for the neutrino rest mass in the tritium beta-decay are presented. Study of time dependence of anomalous, bump-like structure at the end of ...beta spectrum reported earlier gives indication of periodic shift of the position of the bump with respect to the end-point energy with a period of 0.5 year. A new upper limit for electron antineutrino rest mass
m
ν
<2.5 eV/c
2 95% C.L. is derived after accounting for the bump.
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