Design and application of glow discharge cleaning at Uragan-2M stellarator
For the Uragan-2M stellarator, a glow discharge cleaning (GDC) system is developed. An overview of the GDC system design is presented. The first experimental studies of GDC in an argon atmosphere have been carried out. The dependence of the breakdown voltage on the argon pressure is determined. The...
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2021
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| Цитувати: | Design and application of glow discharge cleaning at Uragan-2M stellarator / Yu.V. Kovtun, V.E. Moiseenko, S.M. Maznichenko, A.V. Lozin, V.B. Korovin, E.D. Kramskoy, Y.V. Siusko, M.M. Kozulya, A.Yu. Krasiuk, V.M. Listopad, D.I. Baron // Problems of atomic science and tecnology. — 2021. — № 1. — С. 19-24. — Бібліогр.: 29 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859471430968672256 |
|---|---|
| author | Kovtun, Yu.V. Moiseenko, V.E. Maznichenko, S.M. Lozin, A.V. Korovin, V.B. Kramskoy, E.D. Siusko, Y.V. Kozulya, M.M. Krasiuk, A.Yu. Listopad, V.M. Baron, D.I. |
| author_facet | Kovtun, Yu.V. Moiseenko, V.E. Maznichenko, S.M. Lozin, A.V. Korovin, V.B. Kramskoy, E.D. Siusko, Y.V. Kozulya, M.M. Krasiuk, A.Yu. Listopad, V.M. Baron, D.I. |
| citation_txt | Design and application of glow discharge cleaning at Uragan-2M stellarator / Yu.V. Kovtun, V.E. Moiseenko, S.M. Maznichenko, A.V. Lozin, V.B. Korovin, E.D. Kramskoy, Y.V. Siusko, M.M. Kozulya, A.Yu. Krasiuk, V.M. Listopad, D.I. Baron // Problems of atomic science and tecnology. — 2021. — № 1. — С. 19-24. — Бібліогр.: 29 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | For the Uragan-2M stellarator, a glow discharge cleaning (GDC) system is developed. An overview of the GDC system design is presented. The first experimental studies of GDC in an argon atmosphere have been carried out. The dependence of the breakdown voltage on the argon pressure is determined. The current-voltage characteristics of the gas discharge were measured as a function of the working gas pressure also in presence of a magnetic field.
На стелараторі Ураган-2М розроблена система для чищення стінок вакуумної камери жевріючим розрядом. Представлено огляд системи жевріючого розряду. Проведено перші експериментальні дослідження розряду в атмосфері аргону. Визначено залежність пробивної напруги від тиску аргону. Виміряні вольт-амперні характеристики газового розряду в залежності від тиску робочого газу при відсутності і наявності магнітного поля.
На стеллараторе Ураган-2М разработана система для чистки стенок вакуумной камеры тлеющим разрядом. Представлен обзор системы тлеющего разряда. Проведены первые экспериментальные исследования разряда в атмосфере аргона. Определена зависимость пробивного напряжения от давления аргона. Измерены вольт-амперные характеристики газового разряда в зависимости от давления рабочего газа при отсутствии и наличии магнитного поля.
|
| first_indexed | 2025-11-24T10:02:20Z |
| format | Article |
| fulltext |
ISSN 1562-6016. ВАНТ. 2021. №1(131)
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2021, №1. Series: Plasma Physics (27), p. 19-24. 19
https://doi.org/10.46813/2021-131-019
DESIGN AND APPLICATION OF GLOW DISCHARGE CLEANING AT
URAGAN-2M STELLARATOR
Yu.V. Kovtun, V.E. Moiseenko, S.M. Maznichenko, A.V. Lozin, V.B. Korovin, E.D. Kramskoy,
Y.V. Siusko, M.M. Kozulya, A.Yu. Krasiuk, V.M. Listopad, D.I. Baron
Institute of Plasma Physics, National Science Center “Kharkov Institute of Physics and
Technology”, Kharkiv, Ukraine
E-mail: Ykovtun@kipt.kharkov.ua
For the Uragan-2M stellarator, a glow discharge cleaning (GDC) system is developed. An overview of the GDC
system design is presented. The first experimental studies of GDC in an argon atmosphere have been carried out.
The dependence of the breakdown voltage on the argon pressure is determined. The current-voltage characteristics
of the gas discharge were measured as a function of the working gas pressure also in presence of a magnetic field.
PACS: 52.80.-s; 52.80.Hc; 51.50.+v
INTRODUCTION
In experimental studies of high-temperature plasma,
which are aimed at solving the problems of controlled
thermonuclear fusion, it is important to reduce the flux
of light and heavy impurities to the plasma column.
Presence of impurities at the inner walls of the vacuum
chambers of installations for high-temperature plasma
confinement leads to their entry into the plasma and,
accordingly, to several negative consequences as
decrease of plasma parameters, increase of energy
losses, and even to radiation collapses and disruptions in
the case of tokamaks. For this reason, the preparation of
inner vacuum surfaces is an integral part of the
functioning of fusion installations.
Various methods are used for wall conditioning [1,
2]. To create plasma in cleaning modes, various types of
cleaning discharges, both stationary and pulsed, are
used. Glow discharge [1, 2] and various types of high-
frequency discharges [1-7] are widely used for cleaning
the inner surfaces of vacuum chambers of tokamaks and
stellarators. High-frequency discharges in various
frequency ranges (electron-cyclotron frequency [1-3],
ion-cyclotron frequency [1-3], ultrashort waves [6, 7])
are used mainly in the presence of a magnetic field. on
the contrary Glow discharge cleaning (GDC), is used
mainly without a magnetic field, although, in principle,
the discharge can also burn in a magnetic field. The
advantage of a glow discharge is the possibility of
implementing it in large vacuum volumes and technical
simplicity. A significant disadvantage is the sputtering
of materials in contact with the plasma, which leads to
the deposition of metal films on the equipment located
in it [8, 9]. Despite this drawback, the technology of
cleaning the wall of the vacuum chamber with a glow
discharge plasma is the most common and is used in
large installations, for example, in TEXTOR [8],
Wendelstein 7-X [9-11], ASDEX-U [12], JET [13],
LHD [14], EAST [15], SST-1 [16]. In the future, it is
planned to use the GDC system at ITER [17].
Each of the systems used for GDC has its own
design and technical features. Common to all systems is
the use of a vacuum chamber wall as a cathode, and
specially designed electrodes as anodes, which are
placed into the vacuum volume. The number of
electrodes (anodes) is usually from 2 (SST-1 [16], LHD
[14]) to 4 (ASDEX-U [12], JET [13], EAST [15]). The
electrodes (anodes) 10, are installed on Wendelstein 7-X
[9-11]. The electrodes are usually placed symmetrically
along the torus. Stainless steel [15, 16] or graphite [9-
12] are used as the electrode material.
Earlier, the Uragan-2M (U-2M) stellarator did not
use a glow discharge to clean the vacuum chamber, and,
accordingly, the installation was not equipped with an
electrode system for its implementation. The GDC
system at the U-2M would allow expanding the
experimental capabilities when conducting experiments
on cleaning the vacuum chamber. Therefore, the GDC
system was developed, manufactured, and installed on
the U-2M. The design and technical features of which,
as well as the results of the first studies of a glow
discharge, are presented in this work.
1. EXPERIMENTAL SETUP
The U-2M setup (see Fig. 1) is a medium-sized
stellarator (torsatron type) with a major radius
R = 1.7 m, the average plasma radius rpl < 0.24 m, and a
toroidal magnetic field B0 < 2.4 T [18]. The vacuum
chamber has a toroidal shape with a radius of rc=0.34 m,
a volume of Vс = 3.9 m
3
(excluding vacuum ports), and
a torus surface area S = 22.8 m
2
. The chamber has 48
ports, which are used for diagnostic tools, for working
gas puff, and vacuum pumping. The vacuum chamber is
pumped using three turbomolecular pumps of the TMN-
500 type with a pumping rate of 500 l/s. In the fore-
vacuum pressure area, pumping is carried out only by a
mechanical fore-vacuum pump AVZ-63D with a
pumping speed of 63 l/s.
2. OVERVIEW OF THE GDS DESIGN
A system of 4 identical water-cooled electrodes
(anodes) was developed, manufactured and installed on
the U-2M. They were made in the form of bent
cylindrical rods made of stainless steel (Fig. 2,a). The
length of the current-collecting part of the electrode was
59 cm, the diameter was 2 cm. The electrodes are
installed on a standard flange with a feedthrough
insulator made of fluoroplastic F-4. The measured
resistance between the electrode and the flange was
mailto:Ykovtun@kipt.kharkov.ua
20 ISSN 1562-6016. ВАНТ. 2021. №1(131)
more than 200 MΩ. Use of water to cool the electrodes
reduces the resistance between the electrode and the
vacuum chamber to a value of ~ 300 kΩ. To prevent
breakdown, a part of the electrode, 10.5 cm long, is
covered with a quartz tube ø 38 and 2 mm thick (see
Fig. 2,a).
Fig. 1. Scheme U-2M. I – poloidal coils; II – helical
coils; III – toroidal field coils toroidal field
coils numbered 1–16
This design also increases the distance from the current-
collecting part of the electrode to the chamber wall. The
area of the current-collecting surface of one electrode is
392 cm
2
. The total area of four electrodes is 1560 cm
2
.
The electrodes were installed on the U-2M (Fig. 2,b) at
standard ports ø 45 mm in the cross-sections Z1, Z2, Z3,
Z4 (see Fig. 1). The electrodes were located at a
distance of 3 cm from the last closed flux surface at
kφ = 0.32 (kφ=Bth/(Bth+Btt), where Bth and Btt`, are the
toroidal components of the magnetic fields created by
the helical and toroidal coils respectively). They are
directed along the plasma column to keep maximum
distance from the chamber wall and, in the same time,
not to penetrate into the plasma column.
A universal power supply of the UIP-1 type was
used to feed the glow discharge, the output voltage on
which could be smoothly tuned from 20 to 610 V at a
current of up to 600 mA. To feed the discharge at higher
discharge currents and voltages, a power supply unit
with an output voltage of up to 1.9 kV at a current of up
to 5 A was used. The electric scheme for the glow
discharge is shown in Fig. 3. The voltage at the
discharge gap was measured with voltmeters V1 and
V2, and the total anode current was measured with an
ammeter (milliammeter). To avoid arcing, two ballast
resistors R were used, each with a resistance of 1026 Ω
(total resistance 513 Ω). Assuming the resistance
between each electrode and the vacuum chamber
~ 300 kΩ, the maximum earth leakage current at 610 V
is ~ 8 mA.
3. EXPERIMENTAL RESULTS AND
DISCUSSION
The first experiments to study the GDC were carried
out after two weeks of wall conditioning of the U-2M
chamber. During the first week of 4 days, the chamber
was baked at temperature of 70...80 ºС and pumped. In
the second week, the surfaces of the chamber were
cleaned with N2 and Ar plasma created by a stationary
discharge in the very high frequency (VHF) range with
baking continued.
a
b
Fig. 2. Photo of a general view of the electrode (anode).
a – assembled before installation in U-2M
(1 ‒ electrode, 2 ‒ insulator, 3 ‒ flange, 4 ‒ water inlet
and outlet pipes); b ‒ in the U-2M vacuum chamber
(1 ‒ electrode, 2 ‒ insulator, 3 ‒ the wall of the vacuum
chamber)
Fig. 3. Scheme of connecting electrodes to a power
source. 1-4 ‒ electrodes (anodes) respectively installed
in cross-sections Z2, Z4, Z3, Z1 (see Fig. 1); 5 ‒ power
source; 6 ‒ vacuum chamber (cathode); V, V1, V2 ‒
voltmeters, A ‒ ammeter (milliammeter); R ‒ ballast
resistors
The cleaning mode was as described in [19]. After that,
experiments were started with GDC without a magnetic
field or in a field B0 ≈ 0.01 T.
The residual pressure in the vacuum chamber was
po.p. = 2·10
−5
Pa. Then, a working gas was continuously
puffed into the vacuum volume to a pressure of
0.1...14 Pa. High-purity argon (99.998 %) was used as a
working gas.
Since the geometry of the cathode was the walls of
the U-2M toroidal vacuum chamber, in this case, a
hollow cathode discharge can be realized. Hollow
ISSN 1562-6016. ВАНТ. 2021. №1(131) 21
cathode discharges [20, 21] often represent an
independent gas discharge with cold cathodes. In these
discharges, ionization of molecules (atoms) of a neutral
gas occurs due to primary electrons emitted from the
surface of the cathodes when a voltage is applied to the
interelectrode gap and secondary emission when
particles interact with the surface of the cathodes. And
also plasma electrons can take part in gas ionization.
Electric breakdown and the ignition of a self-maintained
discharge in low-pressure gases occurs as a result of the
development of Townsend breakdown, which has the
character of electron avalanche multiplication [22, 23].
One of the peculiarities of a discharge with a hollow
cathode is the inhomogeneity of the electric field in the
discharge gap. In this case, the theoretical consideration
of this type of discharge becomes much more
complicated and often it is necessary to carry out
additional experimental studies and measurements. In
this case, first of all, it was required to determine the
voltage of the discharge ignition on the gas pressure, as
well as the current-voltage characteristics of the
discharge.
The first switching on of the GDC showed that at a
discharge current of more than 50 mA, the discharge
burns unstably, fluctuations in the voltage U and the
current Id of the discharge appeared. The higher the
discharge current was, the higher amplitude the
fluctuations of U and Id. were observed. Similar
fluctuations in GDC were observed earlier on
Wendelstein 7-X [9]. In this case, the fluctuations in the
voltage and discharge current were associated with the
formation of micro arcs on the surface of the vacuum
chamber (cathode), which were observed visually (see
Fig. 4). The formation of micro arcs is associated with
the presence of dust and dielectric films on the cathode
surface. In this case, the value of the discharge current
was chosen such that there were practically no micro
arcs and voltage (current) fluctuations. The situation
gradually improved, and it possible to increase Id to
500 mA without arcing and fluctuations in U and Id.
After this, the discharge ignition voltage and its current-
voltage (I-V) characteristics were measured.
Fig. 5 shows the dependence of the breakdown
voltage on the Ar pressure. The minimum discharge
ignition voltage was Umin ≈ 253 V, the value of which
corresponds to the Stoletov point [23], where the
ionization probability by the electron impact is
maximum, and the conditions for repeatability of the
discharge are optimal. At small p (the left branch of the
Paschen curve [23]), a very strong field is required to
achieve the proper charges multiplication; therefore, the
breakdown voltage rises rapidly with decreasing
pressure. Due to the limited effective cross-section of
ionization, the ionization coefficient is also limited. In
the region of high pressures (on the right branch of the
Pashen curve), the breakdown voltage increases almost
proportionally to the pressure. This is due to the fact
that in the case of high pressures or long gaps, the
electron has the ability to make many ionizing collisions
before reaching the anode.
In Fig. 6 shows a family of current-voltage
characteristics (CVC) for three values of the working
gas pressure. Dependencies have a slight positive slope.
The discharge currents increase with the increasing
voltage across the electrodes. In the case of p = 0.6 Pa,
the discharge voltage across the two pairs of electrodes
is practically the same. A slight difference in voltage of
the order of 0.6...0.7 % is due to the measurement error.
Fig. 4. Discharge photograph
1 – discharge glow in the flange, 2 – micro arcs
Fig. 5. Breakdown voltage versus Ar pressure
Fig. 6. CVC characteristics of the discharge at a
pressure of 0.6 Pa (a), 1.3 Pa (b), 6.7 Pa (c).
(U1 voltage on anodes 1 and 2, U1 voltage on anodes 3
and 4, see Fig. 3)
22 ISSN 1562-6016. ВАНТ. 2021. №1(131)
The maximum power in the discharge was 175 W at a
pressure of 0.6 Pa. The glow of the gas discharge is
observed throughout the optical window. In Fig. 7
shows photographs of the discharge in different sections
of the chamber. In the case of pressure p = 6.7 Pa, the
difference in voltage across two pairs of electrodes is
about 2.1...4.1 %. In this case, the power delivered to
the discharge was ≈ 100 W.
Fig. 7. A photograph of the discharge in different
sections of the chamber P1 (a), V (b), and N (c)
(p = 0.6 Pa)
It was of interest to conduct experiments with only
one anode turned on. First, it is important for
understanding the physics of the discharge. Multiple
anodes complicate somewhat the consideration of the
discharge. Secondly, from the technical point of view, it
is important to realize the discharge if it is impossible to
turn on all the anodes for technical reasons. Note that in
large toroidal chambers, the presence of only one anode
can lead to inhomogeneity of the plasma density and the
density of the ion current per cathode (wall of the
vacuum chamber) along the torus [24].
The experiments were carried out with only one
anode turned on, installed in the Z1 section. In this case,
the resistance of the ballast resistor was 1026 Ω. In the
case of one anode, the value of the breakdown voltage
corresponded to the previously measured value for the
case of four anodes (see Fig. 5). The behavior of the I-V
characteristic of a discharge with one anode was the
same as for four anodes (Fig. 8). The discharge voltage
and discharge current were close in value to those
measured for 4 anodes. Thus, the maximum adsorbed
power in the discharge was 87 W at a pressure of 0.8 Pa.
The dependence of the voltage across the discharge on
the pressure at Id = const is not monotonic (Fig. 9). In
general, in this case, for a GDC, the behavior of the
CVC and the dependence U(p) at Id = const are typical
for a discharge with a hollow cathode [20, 21, 25].
Thus, under these experimental conditions, a discharge
similar to a discharge with a hollow cathode was
realized.
A discharge with a hollow cathode can also be
realized in a magnetic field [21, 25]. The I-V
characteristics of discharges in a magnetic field and
without a magnetic field were compared (Fig. 10). As
seen from Fig. 10 at a discharge current of up to 0.04 A,
the discharge voltage in a magnetic field is slightly less
than without it. At currents more than 0.05 A, on the
contrary, for example, at a current of 0.28 A, the
discharge voltage in a magnetic field is 40 V lower than
without a magnetic field. Similar behavior of the I-V
characteristic was observed earlier in [25].
In a stationary discharge, the total current Ia through
the anode should be equal to the total current Ic through
the cathode [22]. For GDC in large vacuum chambers, it
is characteristic that the cathode area Sc is much larger
than the area of the anodes Sa [26]. In this case, the Sc/Sa
ratio for the case of 4 anodes and one anode,
respectively, is ≈7 · 10
-3
and ≈2 · 10
-3
. Accordingly, the
average value of the current density at the anodes will
be higher than at the cathode.
Fig. 8. CVC characteristics of the discharge at
pressure: 1 ‒ 0.8 Pa, 2 ‒ 1.8 Pa, 3 ‒ 5.6 Pa
(one anode is included in the Z1 section)
Fig. 9. Dependence of the discharge burning voltage on
the pressure at the discharge current: 1 ‒ 0.08 A,
2 ‒ 0.18 A, 3 ‒ 0.26 A (one anode is enabled in the Z1
section)
Fig. 10. CVC of the discharge at B0 = 0 T (1) and
B0 ≈ 0.01 T (2) (one anode is included in the section Z1,
p = 0.6 Pa)
ISSN 1562-6016. ВАНТ. 2021. №1(131) 23
An estimate shows that at a current of 0.5 A, the
average current density at the cathode is
jc ≈ 2.2 μA/cm
2
, and at the anode, ja ≈321 μA/cm
2
. Note
that the current density may not be substantially uniform
over the surface of the electrodes, and the effective
surface area is not equal to the geometric one.
Depending on the geometrical factors of the anode and
the discharge parameters, various sheath structures can
be observed, such as: ion sheaths, electron sheaths,
double sheaths, double layers, anode glow, fireballs, as
well as anode spots [27].
Sputtering is one of the main processes leading to
the destruction of the cathode material and, accordingly,
its entry into the plasma. The main characteristic of the
sputtering process is the sputtering coefficient Y, which
depends on the charge and mass of the incident ion, its
energy, angle of incidence, as well as on the material
and temperature of the target. The sputtering coefficient
Y of iron by Ar
+
ions in the energy range 190...350 eV at
normal incidence is in the range 0.37...0.67 [28]. For
carbon Y at the same energies of Ar
+
ions is in the range
of 0.05...0.15 [28]. In the case of sputtering of a–C:H
films by Ar
+
ions in the presence of neutral hydrogen
atoms in the plasma, Y significantly increases due to the
mechanism of chemical sputtering [29]. Hydrogen can
enter the discharge through the processes of dissociation
of water and hydrogen-containing compounds.
CONCLUSIONS
The GDC system was developed, manufactured and
installed on the U-2M. The design and technical
features of this system are described. The first
experimental studies of GDC in an argon atmosphere
have been carried out. The dependence of the
breakdown voltage on the argon pressure is determined.
The CVC of the gas discharge were measured
depending on the pressure of the working gas in the
absence and presence of a magnetic field.
The GDC system at the U-2M expands the
experimental possibilities when carrying out
experiments on cleaning the vacuum chamber.
ACKNOWLEDGEMENTS
The work was done according to the program
“Priority scientific research development support” in the
project № 25/22-2019.
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Article received 23.12.2020
КОНСТРУКЦИЯ И ПРИМЕНЕНИЕ ТЛЕЮЩЕГО РАЗРЯДА ДЛЯ ЧИСТКИ В СТЕЛЛАРАТОРЕ
УРАГАН-2М
Ю.В. Ковтун, В.Е. Моисеенко, С.М. Мазниченко, А.В. Лозин, В.Б. Коровин, Е.Д. Крамской, Е.В. Сюсько,
M.M. Козуля, А.Ю. Красюк, В.М. Листопад, Д.И. Барон
На стеллараторе Ураган-2М разработана система для чистки стенок вакуумной камеры тлеющим
разрядом. Представлен обзор системы тлеющего разряда. Проведены первые экспериментальные
исследования разряда в атмосфере аргона. Определена зависимость пробивного напряжения от давления
аргона. Измерены вольт-амперные характеристики газового разряда в зависимости от давления рабочего
газа при отсутствии и наличии магнитного поля.
КОНСТРУКЦІЯ І ЗАСТОСУВАННЯ ЖЕВРІЮЧОГО РОЗРЯДУ ДЛЯ ЧИСТКИ В СТЕЛАРАТОРІ
УРАГАН-2М
Ю.В. Ковтун, В.Є. Моісеєнко, С.М. Мазніченко, О.В. Лозін, В.Б. Коровін, Є.Д. Крамський, Є.В. Сюсько,
M.M. Козуля, О.Ю. Красюк, В.М. Листопад, Д.І. Барон
На стелараторі Ураган-2М розроблена система для чищення стінок вакуумної камери жевріючим
розрядом. Представлено огляд системи жевріючого розряду. Проведено перші експериментальні
дослідження розряду в атмосфері аргону. Визначено залежність пробивної напруги від тиску аргону.
Виміряні вольт-амперні характеристики газового розряду в залежності від тиску робочого газу при
відсутності і наявності магнітного поля.
|
| id | nasplib_isofts_kiev_ua-123456789-194724 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-11-24T10:02:20Z |
| publishDate | 2021 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Kovtun, Yu.V. Moiseenko, V.E. Maznichenko, S.M. Lozin, A.V. Korovin, V.B. Kramskoy, E.D. Siusko, Y.V. Kozulya, M.M. Krasiuk, A.Yu. Listopad, V.M. Baron, D.I. 2023-11-29T10:09:26Z 2023-11-29T10:09:26Z 2021 Design and application of glow discharge cleaning at Uragan-2M stellarator / Yu.V. Kovtun, V.E. Moiseenko, S.M. Maznichenko, A.V. Lozin, V.B. Korovin, E.D. Kramskoy, Y.V. Siusko, M.M. Kozulya, A.Yu. Krasiuk, V.M. Listopad, D.I. Baron // Problems of atomic science and tecnology. — 2021. — № 1. — С. 19-24. — Бібліогр.: 29 назв. — англ. 1562-6016 PACS: 52.80.-s; 52.80.Hc; 51.50.+v https://nasplib.isofts.kiev.ua/handle/123456789/194724 For the Uragan-2M stellarator, a glow discharge cleaning (GDC) system is developed. An overview of the GDC system design is presented. The first experimental studies of GDC in an argon atmosphere have been carried out. The dependence of the breakdown voltage on the argon pressure is determined. The current-voltage characteristics of the gas discharge were measured as a function of the working gas pressure also in presence of a magnetic field. На стелараторі Ураган-2М розроблена система для чищення стінок вакуумної камери жевріючим розрядом. Представлено огляд системи жевріючого розряду. Проведено перші експериментальні дослідження розряду в атмосфері аргону. Визначено залежність пробивної напруги від тиску аргону. Виміряні вольт-амперні характеристики газового розряду в залежності від тиску робочого газу при відсутності і наявності магнітного поля. На стеллараторе Ураган-2М разработана система для чистки стенок вакуумной камеры тлеющим разрядом. Представлен обзор системы тлеющего разряда. Проведены первые экспериментальные исследования разряда в атмосфере аргона. Определена зависимость пробивного напряжения от давления аргона. Измерены вольт-амперные характеристики газового разряда в зависимости от давления рабочего газа при отсутствии и наличии магнитного поля. The work was done according to the program “Priority scientific research development support” in the project № 25/22-2019. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Magnetic confinement Design and application of glow discharge cleaning at Uragan-2M stellarator Конструкція і застосування жевріючого розряду для чистки в стелараторі Ураган-2М Конструкция и применение тлеющего разряда для чистки в стеллараторе Ураган-2М Article published earlier |
| spellingShingle | Design and application of glow discharge cleaning at Uragan-2M stellarator Kovtun, Yu.V. Moiseenko, V.E. Maznichenko, S.M. Lozin, A.V. Korovin, V.B. Kramskoy, E.D. Siusko, Y.V. Kozulya, M.M. Krasiuk, A.Yu. Listopad, V.M. Baron, D.I. Magnetic confinement |
| title | Design and application of glow discharge cleaning at Uragan-2M stellarator |
| title_alt | Конструкція і застосування жевріючого розряду для чистки в стелараторі Ураган-2М Конструкция и применение тлеющего разряда для чистки в стеллараторе Ураган-2М |
| title_full | Design and application of glow discharge cleaning at Uragan-2M stellarator |
| title_fullStr | Design and application of glow discharge cleaning at Uragan-2M stellarator |
| title_full_unstemmed | Design and application of glow discharge cleaning at Uragan-2M stellarator |
| title_short | Design and application of glow discharge cleaning at Uragan-2M stellarator |
| title_sort | design and application of glow discharge cleaning at uragan-2m stellarator |
| topic | Magnetic confinement |
| topic_facet | Magnetic confinement |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/194724 |
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