Autor: Palka, N. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Extension of the p-Spectrum Method to the Higher Frequencies
Autorzy:: Pałka, N.
Powiązania:: https://bibliotekanauki.pl/articles/1399394.pdf
Data publikacji:: 2013-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 07.57.Ty
78.20.Ci
78.40.-q
78.47.jg
Opis:: The p-spectrum method is a time domain spectroscopy-based technique for reflection analysis of materials (including explosives) that takes into account only part of the reflected signal, which is next analyzed via the Fourier transform. The method is limited to the frequencies of about 1.8 THz due to the pulse properties of our time domain spectroscopy setup. In this paper we theoretically prove that application of a shorter pulse can increase this frequency range up to 2.2 THz, that enables analysis of penthrite and octogen, two important explosives.
Źródło:: Acta Physica Polonica A; 2013, 124, 3; 534-537
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Complex THz Reflectance Spectra of Hexogen Measured for Various Surfaces
Autorzy:: Palka, N.
Powiązania:: https://bibliotekanauki.pl/articles/1418028.pdf
Data publikacji:: 2012-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 07.57.Ty
78.20.Ci
78.40.Pg
78.40.-q
78.47.jg
Opis:: In this paper, we report on measurements of reflection spectra of hexogen (RDX) by means of time domain spectroscopy. We analyzed both phase and amplitude of reflected impulses for three cases: detuning, samples with rough surfaces and samples with curved surfaces. It can be concluded that both spectral characteristics can be applied for identification of explosives in the reflection configuration.
Źródło:: Acta Physica Polonica A; 2012, 122, 5; 854-857
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Transmission Spectra of Materials in the Terahertz Range Measured by a Hot Electron Bolometer-Based System
Autorzy:: Pałka, N.
Walczakowski, M.
Zagrajek, P.
Czerwiński, A.
Sypek, M.
Szustakowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/1399395.pdf
Data publikacji:: 2013-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 07.57.Ty
78.20.Ci
78.40.-q
78.47.jg
Opis:: This paper presents an optical system for transmission spectral measurements in the terahertz range. The source of radiation is a tunable solid-state laser, which generates a narrow-band nanosecond pulses in the range 0.67-2.68 THz and based on optical parametric oscillator phenomenon. The signal is detected with a fast and sensitive hot electron bolometer. Principle of generation and detection of pulses as well as methodology of measuring spectral characteristics are presented. We compared the results obtained with the free-space setup, which is based on the optical parametric oscillator and hot electron bolometer, with a purged time domain spectroscopy system in the range of 0.7-2.2 THz.
Źródło:: Acta Physica Polonica A; 2013, 124, 3; 538-541
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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