Počet záznamů: 1  

Simulation of optimal measurement setting and calibration of a novel time-offlight spectrometer

  1. 1.
    0510317 - ÚPT 2020 DE eng A - Abstrakt
    Zouhar, Martin - Daniel, Benjamin - Radlička, Tomáš - Oral, Martin - Konvalina, Ivo
    Simulation of optimal measurement setting and calibration of a novel time-offlight spectrometer.
    Microscopy Conference: MC 2019. Abstracts. Berlin: DSE, 2019. s. 603-604.
    [Microscopy Conference : MC 2019. 01.09.2019-05.09.2019, Berlin]
    Grant CEP: GA TA ČR(CZ) TN01000008; GA TA ČR(CZ) TE01020118
    Institucionální podpora: RVO:68081731
    Klíčová slova: measurement setting and calibration * novel time-offlight
    Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika
    Obor OECD: Electrical and electronic engineering

    We present setting optimal measurement parameters of components of the time-of-flight (ToF) spectrometer via electron tracing in the regions below the sample. The results of the optimization are used to generate a time-to-energy (T2E) conversion table and to consequently convert spectra measured in the time-domain.
    The goal is to find optimal potentials on the electrodes of the ToF spectrometer which shall be used during
    measurement and in creation of the T2E conversion table.
    A particle tracing library is used to generate data for a given set of values of voltages at the components of the ToF spectrometer for specified outgoing energies up to the landing energy (LE) and angles. The relevant part of the data consists of the triplet the ToF, the angle, and the energy. These values are used to construct a descriptor Q that is optimized to reach the best achievable properties of the spectrometer. Q consists of three interrelated contributions. The first is the signal S, ratio of the counts of the detected and emitted electrons. The second is the resolution R, constructed from a time-spread due to multiple electron trajectories with the same outgoing energy but different angles being detected. The third is the length of the spectrum in the time-domain T, the difference in the ToF corresponding to the LE and some (lower) reference energy. The quantity Q is optimized and the data set of the triplets (ToF, angle, energy) corresponding to the optimal point in the voltage space are used to generate the T2E conversion table.

    Trvalý link: http://hdl.handle.net/11104/0300825
Počet záznamů: 1