ELFT HÍRADÓ

[Réfy Dániel <refy.daniel AT ek-cer.hu>]

FPL Seminar


Saed J. Al Atawneh (ATOMKI, DE) - Atomic Cross Section for Plasma-wall and
Plasma Edge Interaction Modelling in Controlled Fusion Reactor


abstract:


Atomic Cross Section for Plasma-wall and Plasma Edge Interaction Modelling
in Controlled Fusion Reactor

Saed J. Al Atawneh1, 2 and K Tőkési1

1Institute for Nuclear Research (ATOMKI), 4026 Debrecen Bem tér 18/c,
Hungary

2 Doctoral School of Physics, Faculty of Science and Technology, University
of Debrecen, P.O.400, Debrecen, Hungary

 The hydrogen atoms generated by ion recombination on the fusion reactor's
wall and other plasma-facing components [1-5] play a significant role in the
beam emission spectroscopy (BES), which is an active plasma diagnostic tool
used for density measurements in fusion research [1]. The cross sectional
data of H-H atom collisions act as raw data for BES modeling. Besides
hydrogen atoms, the impurities such as carbon, lithium, oxygen, deuterium,
and tritium have existed in the plasma edge area [4, 5]. As comprehensive
studies, the interactions of carbon and lithium ions with neutral hydrogen
atoms were also investigated [4, 5], where carbon composites are used in
first wall tiles [6-8] and lithium ions were used as a potential solution to
solve the fusion reactor divertor heat flux. The ionized lithium ions can
form a highly radiative layer of plasma, thus could significantly reduce the
heat flux to the divertor surfaces [4, 9]. This work is created toward
developing a theoretical description of inelastic interactions such as
ionization and excitation processes that can give the total cross section
accurately. In addition it is also contribute to creating a database for
total cross sections as raw data for the BES modeling [10].

 Classical calculations for determining atomic collision cross sections have
received a great deal of interest in the past 20 years. There was a great
revival of the CTMC calculations applied in atomic collisions involving
three or more particles [2-5]. The CTMC method is a non-perturbative method,
where classical equations of motions are solved numerically [2-5]. For a
better description of the classical atomic collisions, the quasi-classical
trajectory Monte Carlo model of the Kirschbaum and Wilets (QCTMC) improves
the results of the standard CTMC model [3-5]. 

We present ionization, excitation, and electron capture cross sections in
collisions between hydrogen atom, carbon and lithium ions with hydrogen
atoms. We found a reasonably good agreement between classical results and
the previously obtained experimental data. 

 References: 

[1] Atawneh S. J. A., Asztalos Ö., Szondy B., Pokol G. I. and Tőkési K. 2020
Atoms 8  31 

[2] Saed J.A.A. and Tőkési K. 2021 J. Phys. B: At. Mol. Opt. Phys. 54
065202

[3] Saed J.A.A. and Tőkési K. Ionization cross sections in collisions
between two hydrogen atoms by a quasi-classical trajectory Monte Carlo
model, (To be submitted)

[4] Saed J.A.A. and Tőkési K. Target electron removal in C5+ + H collision,
(Accepted in Nuclear Fusion)

[5] Saed J.A.A. and Tőkési K. Ionization Cross Section in Liq+ + H
Collision. (To be published in Physics letters A)

[6] Lawson K.D., Coffey I.H., Aggarwal K.M., Keenan F.P. and Contributors
J-E. 2013 J. Phys. B: At. Mol. Opt. Phys  46  035701

[7] Federici G. 2006 Phys. Scr  T124  1-8

[8] Lipschultz B., et al 2007 Nucl. Fusion   47  1189-1205

[9] Rognlien T.D. and Rensink M.E. 2002 Physics of Plasmas 9  2120-2126

[10] Saed J.A.A. and Tőkési K. PROJECTILE IONIZATION, EXCITATION AND
DE-EXCITATION CROSS SECTION DATABASE IN COLLISION BETWEEN TWO HYDROGEN ATOMS
IN THE IMPACT ENERGY RANGE BETWEEN 5.0 keV - 5.0 MeV - PART I, TARGET IS IN
GROUND STATE. (To be published in Atomic Data and Nuclear Data tables)

Time: 2021.10.12. 14:00 CEST 

(event link
<https://calendar.google.com/event?action=TEMPLATE&tmeid=amE0Zm8yM3AxZTFodjN
qcW5pYzJuaWRqNzAgdGtrM2hjZGYzczY0NWMyZzJkbWtkbzVqcGtAZw&tmsrc=tkk3hcdf3s645c
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<https://calendar.google.com/calendar/embed?src=tkk3hcdf3s645c2g2dmkdo5jpk%4
0group.calendar.google.com&ctz=Europe%2FBudapest> calendar link)

 

Location:

Live meeting at EK building 6, 2nd floor, 217 - seminar room

Online meeting, will be broadcasted through Teams
<https://teams.microsoft.com/l/meetup-join/19%3a2fd34a2f62ff4f05a2737f2c1070
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1%22%7d> .

 

Kind regards: Daniel Refy

 

 <http://www.ek-cer.hu/> 
Dániel Imre RÉFY
Physicist
Fusion Plasma Physics Department 

Atomic Energy Research Institute 
Centre for Energy Research
Eötvös Loránd Research Network
29-33. Konkoly-Thege Miklós út, Budapest, 1121, Hungary 

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Attachment: Saed-Tokesi-Oktober12.pdf
Description: Adobe PDF document

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