TY  - GEN
AU  - Spasojevic, Djordje
AU  - Ivanović, Nikola V.
AU  - Šišović, Nikola M.
AU  - Nedić, Nikodin V.
AU  - Konjevic, Nikola
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6933
AB  - We present an iterative kinetic model of the cathode-fall region in an abnormal glow
discharge of pure neon, which enables determination of the distribution of electric
field strength E, the distribution of the number densities of Ne atoms and Ne+ ions
together with the spectral shapes of Ne I and Ne II lines recorded end-on and side on at various distances from the cathode. We compare our model predictions with
corresponding experimental electric field strength distributions determined from Ne
I 515.443 nm line recorded side-on under same experimental conditions. These Ne I
line recordings enable experimental determination of the electric field distribution via
measurement of the Stark shift ∆λ and by using the Stark shift coefficient C in a well
known quadratic relation ∆λ = −λ
2CE; the value of C is reported in Ivanovi´c et al.
2017. Furthermore, we compare the model prediction for the shape of Ne II 371.308
nm spectral line which serves as a test for validity of our theoretical model
PB  - Faculty of Mathematics, University of Belgrade
T2  - XII SERBIAN CONFERENCE ON SPECTRAL LINE SHAPES IN ASTROPHYSICS
T1  - ON THE SPECTRAL SHAPES OF Ne II LINES RECORDED FROM THE CATHODE FALL REGION OF AN ABNORMAL GLOW DISCHARGE
SP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6933
ER  - 

@misc{
author = "Spasojevic, Djordje and Ivanović, Nikola V. and Šišović, Nikola M. and Nedić, Nikodin V. and Konjevic, Nikola",
year = "2019",
abstract = "We present an iterative kinetic model of the cathode-fall region in an abnormal glow
discharge of pure neon, which enables determination of the distribution of electric
field strength E, the distribution of the number densities of Ne atoms and Ne+ ions
together with the spectral shapes of Ne I and Ne II lines recorded end-on and side on at various distances from the cathode. We compare our model predictions with
corresponding experimental electric field strength distributions determined from Ne
I 515.443 nm line recorded side-on under same experimental conditions. These Ne I
line recordings enable experimental determination of the electric field distribution via
measurement of the Stark shift ∆λ and by using the Stark shift coefficient C in a well
known quadratic relation ∆λ = −λ
2CE; the value of C is reported in Ivanovi´c et al.
2017. Furthermore, we compare the model prediction for the shape of Ne II 371.308
nm spectral line which serves as a test for validity of our theoretical model",
publisher = "Faculty of Mathematics, University of Belgrade",
journal = "XII SERBIAN CONFERENCE ON SPECTRAL LINE SHAPES IN ASTROPHYSICS",
title = "ON THE SPECTRAL SHAPES OF Ne II LINES RECORDED FROM THE CATHODE FALL REGION OF AN ABNORMAL GLOW DISCHARGE",
pages = "62",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6933"
}

Spasojevic, D., Ivanović, N. V., Šišović, N. M., Nedić, N. V.,& Konjevic, N.. (2019). ON THE SPECTRAL SHAPES OF Ne II LINES RECORDED FROM THE CATHODE FALL REGION OF AN ABNORMAL GLOW DISCHARGE. in XII SERBIAN CONFERENCE ON SPECTRAL LINE SHAPES IN ASTROPHYSICS
Faculty of Mathematics, University of Belgrade., 62.
https://hdl.handle.net/21.15107/rcub_agrospace_6933

Spasojevic D, Ivanović NV, Šišović NM, Nedić NV, Konjevic N. ON THE SPECTRAL SHAPES OF Ne II LINES RECORDED FROM THE CATHODE FALL REGION OF AN ABNORMAL GLOW DISCHARGE. in XII SERBIAN CONFERENCE ON SPECTRAL LINE SHAPES IN ASTROPHYSICS. 2019;:62.
https://hdl.handle.net/21.15107/rcub_agrospace_6933 .

Spasojevic, Djordje, Ivanović, Nikola V., Šišović, Nikola M., Nedić, Nikodin V., Konjevic, Nikola, "ON THE SPECTRAL SHAPES OF Ne II LINES RECORDED FROM THE CATHODE FALL REGION OF AN ABNORMAL GLOW DISCHARGE" in XII SERBIAN CONFERENCE ON SPECTRAL LINE SHAPES IN ASTROPHYSICS (2019):62,
https://hdl.handle.net/21.15107/rcub_agrospace_6933 .

TY  - CONF
AU  - Ivanović, Nikola V.
AU  - Šišović, Nikola M.
AU  - Majstorović, Gordana Lj.
AU  - Spasojevic, Djordje
AU  - Konjevic, Nikola
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6931
AB  - We report the initial results of a study of the Ne I 503.775 nm spectral line profiles in an abnormal Grimm glow discharge of pure neon. The profiles were recorded under same experimental conditions both end-on (i.e. along the discharge axis) and side-on (i.e. in a direction parallel to the cathode surface). We show that Our findings may have a considerable importance for the elemental trace analysis performed with the aid of optical emission spectroscopy of the end-on radiation profiles preventing possible misinterpretation of the profile wavy features as a weak radiation emitted by some elements that are contained in traces in the samples under study.
PB  - Faculty of Physics, Univerisity of Belgrade
C3  - The XII Symposium of Belarus and Serbia on Physics and Diagnostics of Laboratory and Astrophysical Plasmas
T1  - ON THE ORIGIN OF THE WAVY RED WING OF A Ne I SPECTRAL LINE OBSERVED END-ON
SP  - 67
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6931
ER  - 

@conference{
author = "Ivanović, Nikola V. and Šišović, Nikola M. and Majstorović, Gordana Lj. and Spasojevic, Djordje and Konjevic, Nikola",
year = "2018",
abstract = "We report the initial results of a study of the Ne I 503.775 nm spectral line profiles in an abnormal Grimm glow discharge of pure neon. The profiles were recorded under same experimental conditions both end-on (i.e. along the discharge axis) and side-on (i.e. in a direction parallel to the cathode surface). We show that Our findings may have a considerable importance for the elemental trace analysis performed with the aid of optical emission spectroscopy of the end-on radiation profiles preventing possible misinterpretation of the profile wavy features as a weak radiation emitted by some elements that are contained in traces in the samples under study.",
publisher = "Faculty of Physics, Univerisity of Belgrade",
journal = "The XII Symposium of Belarus and Serbia on Physics and Diagnostics of Laboratory and Astrophysical Plasmas",
title = "ON THE ORIGIN OF THE WAVY RED WING OF A Ne I SPECTRAL LINE OBSERVED END-ON",
pages = "67",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6931"
}

Ivanović, N. V., Šišović, N. M., Majstorović, G. Lj., Spasojevic, D.,& Konjevic, N.. (2018). ON THE ORIGIN OF THE WAVY RED WING OF A Ne I SPECTRAL LINE OBSERVED END-ON. in The XII Symposium of Belarus and Serbia on Physics and Diagnostics of Laboratory and Astrophysical Plasmas
Faculty of Physics, Univerisity of Belgrade., 67.
https://hdl.handle.net/21.15107/rcub_agrospace_6931

Ivanović NV, Šišović NM, Majstorović GL, Spasojevic D, Konjevic N. ON THE ORIGIN OF THE WAVY RED WING OF A Ne I SPECTRAL LINE OBSERVED END-ON. in The XII Symposium of Belarus and Serbia on Physics and Diagnostics of Laboratory and Astrophysical Plasmas. 2018;:67.
https://hdl.handle.net/21.15107/rcub_agrospace_6931 .

Ivanović, Nikola V., Šišović, Nikola M., Majstorović, Gordana Lj., Spasojevic, Djordje, Konjevic, Nikola, "ON THE ORIGIN OF THE WAVY RED WING OF A Ne I SPECTRAL LINE OBSERVED END-ON" in The XII Symposium of Belarus and Serbia on Physics and Diagnostics of Laboratory and Astrophysical Plasmas (2018):67,
https://hdl.handle.net/21.15107/rcub_agrospace_6931 .

TY  - CONF
AU  - Nedić, Nikodin V.
AU  - Ivanović, Nikola V.
AU  - Šišović, Nikola M.
AU  - Spasojevic, Djordje
AU  - Konjevic, Nikola
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6926
AB  - We present the results of spectroscopic investigation of hydrogen
Balmer the Hα line in external magnetic field. Hydrogen atoms were excited in a
hollow cathode glow discharge operating in gas mixture of argon and hydrogen
(vol. 99.2% Ar + 0.8% H2). Homogenous magnetic field is generated along the
axis of Helmholtz coils, which generated homogenous magnetic field where the
hollow cathode glow discharge was located. The influence of magnetic field
(B=30, 50, and 70 mT) to the parameters of hollow cathode glow discharge, total
intensity, change in relative contributions and the energy of individual
components of the Hα line was studied. It is shown that not only the changes in
line intensity are detected, but also significant changes in the relative
contributions and energy of individual components of the Hα line occur.
PB  - Vinča Institute of Nuclear Sciences
C3  - 29th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2018)
T1  - THE INFLUENCE OF MAGNETIC FIELD ON THE HYDROGEN BALMER ALPHA LINE IN A HOLLOW CATHODE GLOW DISCHARGE
SP  - 210
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6926
ER  - 

@conference{
author = "Nedić, Nikodin V. and Ivanović, Nikola V. and Šišović, Nikola M. and Spasojevic, Djordje and Konjevic, Nikola",
year = "2018",
abstract = "We present the results of spectroscopic investigation of hydrogen
Balmer the Hα line in external magnetic field. Hydrogen atoms were excited in a
hollow cathode glow discharge operating in gas mixture of argon and hydrogen
(vol. 99.2% Ar + 0.8% H2). Homogenous magnetic field is generated along the
axis of Helmholtz coils, which generated homogenous magnetic field where the
hollow cathode glow discharge was located. The influence of magnetic field
(B=30, 50, and 70 mT) to the parameters of hollow cathode glow discharge, total
intensity, change in relative contributions and the energy of individual
components of the Hα line was studied. It is shown that not only the changes in
line intensity are detected, but also significant changes in the relative
contributions and energy of individual components of the Hα line occur.",
publisher = "Vinča Institute of Nuclear Sciences",
journal = "29th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2018)",
title = "THE INFLUENCE OF MAGNETIC FIELD ON THE HYDROGEN BALMER ALPHA LINE IN A HOLLOW CATHODE GLOW DISCHARGE",
pages = "210",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6926"
}

Nedić, N. V., Ivanović, N. V., Šišović, N. M., Spasojevic, D.,& Konjevic, N.. (2018). THE INFLUENCE OF MAGNETIC FIELD ON THE HYDROGEN BALMER ALPHA LINE IN A HOLLOW CATHODE GLOW DISCHARGE. in 29th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2018)
Vinča Institute of Nuclear Sciences., 210.
https://hdl.handle.net/21.15107/rcub_agrospace_6926

Nedić NV, Ivanović NV, Šišović NM, Spasojevic D, Konjevic N. THE INFLUENCE OF MAGNETIC FIELD ON THE HYDROGEN BALMER ALPHA LINE IN A HOLLOW CATHODE GLOW DISCHARGE. in 29th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2018). 2018;:210.
https://hdl.handle.net/21.15107/rcub_agrospace_6926 .

Nedić, Nikodin V., Ivanović, Nikola V., Šišović, Nikola M., Spasojevic, Djordje, Konjevic, Nikola, "THE INFLUENCE OF MAGNETIC FIELD ON THE HYDROGEN BALMER ALPHA LINE IN A HOLLOW CATHODE GLOW DISCHARGE" in 29th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2018) (2018):210,
https://hdl.handle.net/21.15107/rcub_agrospace_6926 .

TY  - GEN
AU  - Ivanović, Nikola V.
AU  - Šišović, Nikola M.
AU  - Spasojevic, Djordje
AU  - Konjevic, Nikola
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6932
AB  - The analysis of DC Stark shift for NeI 511.367 nm
line was previously reported by Jäger and Windholz
[1] who found that the line splits into three Stark
components, shifted towards larger wavelengths
(i.e. smaller wave numbers). In a wide range of
electric field (>50 kV/cm), they successfully fitted
measured Stark shifts with eq. 2, using the Stark
coefficients listed in table 2, see [1].
Unfortunately, this neon line exhibits small Stark
shifts, which require high spectral resolution for
reliable electric field strength measurement in the
cathode sheath (CS) region of neon glow discharge
(GD). Fortunately, there are another neutral neon
lines, such as NeI 503.134 nm, which have much
larger Stark shifts, but there are no experimental data
for determination of algebraic coefficients for
electric field strength evaluation.
To measure the Stark shifts of the
NeI 511.367 nm line, we have fitted its experimental
profiles with the model function developed for this
purpose. The aim of this work are measurements
Stark shift of NeI 511.367 nm and comparison with
results obtained in [1].
PB  - Fizički fakultet, Univerzitet u Beogradu
T2  - 12th Frontiers in Low Temperature Plasma Diagnostics (FLTPD XII)
T1  - Model function for measuring neon line Stark shift
SP  - 20
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6932
ER  - 

@misc{
author = "Ivanović, Nikola V. and Šišović, Nikola M. and Spasojevic, Djordje and Konjevic, Nikola",
year = "2017",
abstract = "The analysis of DC Stark shift for NeI 511.367 nm
line was previously reported by Jäger and Windholz
[1] who found that the line splits into three Stark
components, shifted towards larger wavelengths
(i.e. smaller wave numbers). In a wide range of
electric field (>50 kV/cm), they successfully fitted
measured Stark shifts with eq. 2, using the Stark
coefficients listed in table 2, see [1].
Unfortunately, this neon line exhibits small Stark
shifts, which require high spectral resolution for
reliable electric field strength measurement in the
cathode sheath (CS) region of neon glow discharge
(GD). Fortunately, there are another neutral neon
lines, such as NeI 503.134 nm, which have much
larger Stark shifts, but there are no experimental data
for determination of algebraic coefficients for
electric field strength evaluation.
To measure the Stark shifts of the
NeI 511.367 nm line, we have fitted its experimental
profiles with the model function developed for this
purpose. The aim of this work are measurements
Stark shift of NeI 511.367 nm and comparison with
results obtained in [1].",
publisher = "Fizički fakultet, Univerzitet u Beogradu",
journal = "12th Frontiers in Low Temperature Plasma Diagnostics (FLTPD XII)",
title = "Model function for measuring neon line Stark shift",
pages = "20",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6932"
}

Ivanović, N. V., Šišović, N. M., Spasojevic, D.,& Konjevic, N.. (2017). Model function for measuring neon line Stark shift. in 12th Frontiers in Low Temperature Plasma Diagnostics (FLTPD XII)
Fizički fakultet, Univerzitet u Beogradu., 20.
https://hdl.handle.net/21.15107/rcub_agrospace_6932

Ivanović NV, Šišović NM, Spasojevic D, Konjevic N. Model function for measuring neon line Stark shift. in 12th Frontiers in Low Temperature Plasma Diagnostics (FLTPD XII). 2017;:20.
https://hdl.handle.net/21.15107/rcub_agrospace_6932 .

Ivanović, Nikola V., Šišović, Nikola M., Spasojevic, Djordje, Konjevic, Nikola, "Model function for measuring neon line Stark shift" in 12th Frontiers in Low Temperature Plasma Diagnostics (FLTPD XII) (2017):20,
https://hdl.handle.net/21.15107/rcub_agrospace_6932 .

TY  - CONF
AU  - Ivanović, Nikola V.
AU  - Spasojevic, Djordje
AU  - Šišović, Nikola M.
AU  - Konjevic, Nikola
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6924
AB  - Spatially resolved profiles of hydrogen Balmer lines have been 
recorded in a low current, low pressure, obstructed neon-hydrogen dc discharge of 
the Grimm type. The polarization dependent Stark splitting of the Halfa line has 
been used to measure the electric field in the cathode fall region. Due to presence 
of mixing of polarization components in line spectra, a dedicated computer 
routine has been developed and utilized for their demixing
PB  - University of Belgrade, Faculty of Physics
C3  - 26th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2014)
T1  - A ROUTINE FOR DEMIXING OF POLARIZATION  COMPONENTS IN PROFILES OF HYDROGEN  BALMER SPECTRAL LINES
SP  - 288
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6924
ER  - 

@conference{
author = "Ivanović, Nikola V. and Spasojevic, Djordje and Šišović, Nikola M. and Konjevic, Nikola",
year = "2016",
abstract = "Spatially resolved profiles of hydrogen Balmer lines have been 
recorded in a low current, low pressure, obstructed neon-hydrogen dc discharge of 
the Grimm type. The polarization dependent Stark splitting of the Halfa line has 
been used to measure the electric field in the cathode fall region. Due to presence 
of mixing of polarization components in line spectra, a dedicated computer 
routine has been developed and utilized for their demixing",
publisher = "University of Belgrade, Faculty of Physics",
journal = "26th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2014)",
title = "A ROUTINE FOR DEMIXING OF POLARIZATION  COMPONENTS IN PROFILES OF HYDROGEN  BALMER SPECTRAL LINES",
pages = "288",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6924"
}

Ivanović, N. V., Spasojevic, D., Šišović, N. M.,& Konjevic, N.. (2016). A ROUTINE FOR DEMIXING OF POLARIZATION  COMPONENTS IN PROFILES OF HYDROGEN  BALMER SPECTRAL LINES. in 26th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2014)
University of Belgrade, Faculty of Physics., 288.
https://hdl.handle.net/21.15107/rcub_agrospace_6924

Ivanović NV, Spasojevic D, Šišović NM, Konjevic N. A ROUTINE FOR DEMIXING OF POLARIZATION  COMPONENTS IN PROFILES OF HYDROGEN  BALMER SPECTRAL LINES. in 26th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2014). 2016;:288.
https://hdl.handle.net/21.15107/rcub_agrospace_6924 .

Ivanović, Nikola V., Spasojevic, Djordje, Šišović, Nikola M., Konjevic, Nikola, "A ROUTINE FOR DEMIXING OF POLARIZATION  COMPONENTS IN PROFILES OF HYDROGEN  BALMER SPECTRAL LINES" in 26th Summer School and International Symposium on the Physics of Ionized Gases (SPIG2014) (2016):288,
https://hdl.handle.net/21.15107/rcub_agrospace_6924 .