Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron
In the λ = 3 Uragan-3M torsatron hydrogen plasma is heated by RF fields in the Ålfven range of frequencies (ω≤ωсi). Plasma with the mean density ‾ne units of 10¹² сm⁻³ is produced by the frame antenna and used as an initial plasma (“target”) to produce and heat a denser plasma (up to ‾ne ~ 10¹³ сm⁻³...
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| Опубліковано в: : | Вопросы атомной науки и техники |
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| Дата: | 2014 |
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| Мова: | Англійська |
| Опубліковано: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2014
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron / V.V. Chechkin, L.I. Grigor’eva, D.L. Grekov, R.O. Pavlichenko, A.V. Lozin, A.A. Kasilov, A.A. Beletskii, M.M. Kozulya, A.Ye. Kulaga, N.V. Zamanov, I.K. Tarasov, Yu.K. Mironov, V.S. Romanov, V.S. Voitsenya // Вопросы атомной науки и техники. — 2014. — № 6. — С. 3-7. — Бібліогр.: 9 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859840122580631552 |
|---|---|
| author | Chechkin, V.V. Grigor’eva, L.I. Grekov, D.L. Pavlichenko, R.O. Lozin, A.V. Kasilov, A.A. Beletskii, A.A. Kozulya, M.M. Kulaga, A.Ye. Zamanov, N.V. Tarasov, I.K. Mironov, Yu.K. Romanov, V.S. Voitsenya, V.S. |
| author_facet | Chechkin, V.V. Grigor’eva, L.I. Grekov, D.L. Pavlichenko, R.O. Lozin, A.V. Kasilov, A.A. Beletskii, A.A. Kozulya, M.M. Kulaga, A.Ye. Zamanov, N.V. Tarasov, I.K. Mironov, Yu.K. Romanov, V.S. Voitsenya, V.S. |
| citation_txt | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron / V.V. Chechkin, L.I. Grigor’eva, D.L. Grekov, R.O. Pavlichenko, A.V. Lozin, A.A. Kasilov, A.A. Beletskii, M.M. Kozulya, A.Ye. Kulaga, N.V. Zamanov, I.K. Tarasov, Yu.K. Mironov, V.S. Romanov, V.S. Voitsenya // Вопросы атомной науки и техники. — 2014. — № 6. — С. 3-7. — Бібліогр.: 9 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | In the λ = 3 Uragan-3M torsatron hydrogen plasma is heated by RF fields in the Ålfven range of frequencies (ω≤ωсi). Plasma with the mean density ‾ne units of 10¹² сm⁻³ is produced by the frame antenna and used as an initial plasma (“target”) to produce and heat a denser plasma (up to ‾ne ~ 10¹³ сm⁻³) by means of the shorter wavelength three-half-turn antenna with azimuthal currents. Characteristics of the three-half-turn-antenna-driven discharge are studied experimentally depending on the RF power fed to the antenna and initial plasma parameters.
В трехзаходном торсатроне Ураган-3М водородная плазма создается и нагревается ВЧ-полями в области альфвеновских частот (ω≤ωсi). Плазма со средней плотностью ‾ne единицы 10¹² см⁻³ создается рамочной антенной и используется как исходная для получения и нагрева более плотной плазмы (до ‾ne ~ 10¹³ см⁻³) с помощью более коротковолновой трехполувитковой антенны с азимутальными токами. Экспериментально исследуются характеристики ВЧ-разряда, поддерживаемого трехполувитковой антенной, в зависимости от ВЧ-мощности, подводимой к антенне, и параметров исходной плазмы.
У трьохзаходному торсатроні Ураган-3М воднева плазма створюється і гріється ВЧ-полями в області альфвенівських частот (ω≤ωсi). Плазма з середньою щільністю ‾ne одиниці 10¹² см⁻³ створюється рамковою антеною і використовується як початкова для одержання та нагріву щільнішої плазми (до ‾ne ~ 10¹³ см⁻³) за допомогою більш короткохвильової трьохнапіввиткової антени з азимутальними струмами. Експериментально досліджуються характеристики ВЧ-розряду, який підтримується трьохнапіввитковою антеною, в залежності від ВЧ-потужності, що підводиться до антени, та параметрів початкової плазми.
|
| first_indexed | 2025-12-07T15:36:18Z |
| fulltext |
MAGNETIC CONFINEMENT
ISSN 1562-6016. ВАНТ. 2014. №6(94)
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2014, №6. Series: Plasma Physics (20), p. 3-7. 3
CHARACTERISTIC PROPERTIES OF THE THREE-HALF-TURN-
ANTENNA-DRIVEN RF DISCHARGE IN THE URAGAN-3M
TORSATRON
V.V. Chechkin, L.I. Grigor’eva, D.L. Grekov, R.O. Pavlichenko, A.V. Lozin, A.A. Kasilov,
A.A. Beletskii, M.M. Kozulya, A.Ye. Kulaga, N.V. Zamanov, I.K. Tarasov, Yu.K. Mironov,
V.S. Romanov, V.S. Voitsenya
Institute of Plasma Physics NSC KIPT, Kharkov, Ukraine
In the = 3 Uragan-3M torsatron hydrogen plasma is heated by RF fields in the Ålfven range of frequencies
( ≲ сi). Plasma with the mean density
en units of 10
12
сm
-3
is produced by the frame antenna and used as an initial
plasma (“target”) to produce and heat a denser plasma (up to
en ~ 10
13
сm
-3
) by means of the shorter wavelength
three-half-turn antenna with azimuthal currents. Characteristics of the three-half-turn-antenna-driven discharge are
studied experimentally depending on the RF power fed to the antenna and initial plasma parameters.
PACS: 52.25.Fi, 52.55.Hc, 52.55.Pi, 52.70.Pi
INTRODUCTION
In the Uragan-3M torsatron (U-3M; = 3 / m = 9,
R0 = 100 сm, a 12 сm, (а)/2 0,3) hydrogen plasma
is produced and heated by RF fields in the Ålfven range
of frequencies ( ≲ сi). The toroidal magnetic field
В ≲ 1 Т is produced by the helical coils only, and the
entire magnetic system is enclosed into a large 5 m
diameter vacuum chamber, so that an open helical
divertor is realized. The initial plasma with the line-
averaged electron density (mean density)
en of units
10
12
сm
-3
is produced by an unshielded frame-like
antenna (FA) with a broad spectrum of parallel
wavelengths || and large parallel currents [1]. In the
regime where
en ~ (1…3) × 10
12
cm
-3
, Те ≳ 100 eV the
plasma is weakly collisional and its investigation is of
spetial interest for modeling physical processes in large
fusion devices [2, 3].
The FA-produced plasma is also used as a target to
produce and heat a denser plasma (
en ~10
13
см
-3
) with the
help of another, shorter wavelength antenna with azimuthal
currents (three-half-turn antenna, THTA) [4, 5].
In this work being a continuation of [6]
characteristics of the THTA-driven discharge are
studied depending on the RF power fed to the antenna
and initial (target) plasma parameters.
1. EXPERIMENTAL CONDITIONS
THTA (Fig. 1) partly covers the plasma column
toroidally over 30 cm. In comparison with FA, the
parallel conductors of THTA are removed farther away
from the plasma to reduce undesirable excitation of the
slow Ålfven wave at the periphery, while the transversal
conductors embrace a larger part of the plasma column
for a more efficient excitation of the fast wave [7, 8].
The excitation maximum in the parallel wavelength
spectrum generated by the antenna falls at || 30 сm.
The antenna is fed by the Kaskad-2 (K2) RF
oscillator with the frequency 2/2 = 8.7 МHz
( 2 = 0.8 ci(0) and maximum RF power fed to the
antenna РК2 350 kW at the anode voltage UK2 = 9 kV.
The resonance local plasma density corresponding to
the excitation maximum at || 30 сm is ~ 10
13
см
-3
.
Fig. 1. Schematic representation of the three-half-turn
antenna [5]
The density
en was measured by a 2 mm
interferometer. The electron temperature (radiation
temperature, Te
rad
) was estimated by the intensity of the
2nd harmonic ECE from the central region. Taking into
account a probable radial density profile, the maximum
en for which the temperature could be estimated by
ECE cannot exceed ~ (6…7) × 10
12
сm
-3
because of the
cut-off effect. Qualitatively, an idea on the level of
plasma loss can be derived from the value of the plasma
divertor flow (PDF) that is presented by the ion
saturation current Is to a Langmuir probe crossed by the
flow in a gap between the helical coils [2].
The fueling gas (hydrogen) was admitted
continuously into the vacuum chamber at the initial
pressure of р ~ 10
-5
Тоrr.
The initial FA-driven RF discharge can stay in two
regimes depending on the pressure p and the RF power
PK1 fed to the antenna [6]. The regime 1 is characterized
by a low density,
en ~ (1…3) × 10
12
сm
-3
, a high Те
rad
(up to
~ 700 eV [6]) and a large plasma loss. In the
regime 2 a higher density is attained (up to
en ~ 7 × 10
12
сm
-3
) with a lower level of ECE and a
lower plasma loss. With a low RF power РК1
4 ISSN 1562-6016. ВАНТ. 2014. №6(94)
0
1
2
3
4
5
6
7
8
9
10
20 25 30 35 40 45 50
0
1
2
3
4
5
6
7
8
9
10
20 25 30 35 40 45 50
K1
K2
1
2
3
4
a
Time, ms
b
K2
K1
1
2
3
4
c
K2
K1
1
2
3
4
n
e
,
1
0
1
2
с
m
-3
d
K2
K1
1
2
3
4
–
Fig. 2. Time evolution of 1 –
en ; 2 – ECE ; 3 – PDF (current Is) and 4 – line CIII intensity at fixed UK1 = 5 kV and
(а) UK2 = 5.0 kV, (b) 6.0 kV, (c) 7.5 kV, (d) 8.5 kV. The mean electron density is in units of 10
12
cm
–3
, while the other
signals are in arbitrary units
(the oscillator anode voltage is UK1 ~ 5…7 kV) during
the RF pulse, as the density increases, the discharge
goes from the regime 1 to the regime 2. With a higher
power the regime 1 spreads over the whole RF pulse.
2. DISCHARGE EVOLUTION DEPENDING
ON THE RF POWER FED TO THTA
With a fixed UK1 = 5 kV (РК1 45 kW) UK2 was
raised from 5 kV ( 150 kW) to 8.5 kV ( 300 kW).
The moment t0 = 28 ms of K1 switched off, with the
initial discharge going from the regime 1 to the regime
2, coincided with the moment t1 of K2 switched on.
With р = 1.05 × 10
-5
Тоrr, the shot-to-shot variation of
the initial density
0en was within ~ (4…5) × 10
12
сm
-3
.
With the lowest value UK2 = 5.0 kV,
en (t) continues
to increase and traverses max
en ~ 8 × 10
12
сm
-3
at the
moment 32.5 ms (Fig. 2,а). ЕСЕ goes on falling to the
level comparable with the interference. The cooling of
electrons is confirmed by a loss decrease (by PDF) and
a rise of the impurity carbon line CIII emission. With
stepping up UК2 (6 kV, see Fig. 2,b), the start of plasma
heating (ECE rise at the beginning of the K2 pulse)
results in a loss increase (a PDP rise) with
corresponding slowing down of the density rise and max
en shift toward RF pulse termination (35 ms in
Fig. 2,b). Beginning in UK2 ~ 7 kV (see Fig. 2,c,
7.5 kV), ЕСЕ and PDF already appreciably exceed their
initial values, and the density rise is slowed down so
that max
en ~ 8 × 10
12
cm
-3
is no more reached within
the THTA pulse, and the density can rise only to
en 5.6 × 10
12
cm
-3
. With UK2 ≳ 8 kV (see Fig. 2,d,
8.5 kV), juxtaposing time behaviors of ЕСЕ, PDP and
en , one can conclude that with the increase of the
heating power and energetic electrons content, the
plasma loss becomes so high that it cannot be balanced
by ionization of neutrals inflowing from the ambient
volume at the adjusted pressure p. This results in a
density decrease in the 1st half of the THTA pulse to
en 3.7 × 10
12
cm
-3
, thus resembling plasma behavior
in the regime 1 of the FA-driven discharge [6]. A
considerable electron heating in Figs. 2,c,d conditions is
evidenced by not only high levels of ECE and PDF but
by a low level of the CIII emission in the active phase of
the discharge and occurrence of the “recombination”
maximum of this emission after K2 switched off.
Note that under Fig. 2,d conditions, PDF, after
passing over the maximum in the 1st half of the THTA
pulse, drops more quickly than ECE, while
en , after
passing over a minimum in the 1st half of the RF pulse,
increases to 4.3 × 10
12
cm
-3
(see, also, Fig. 5,a in
Sec. 4). This means that the plasma loss decreases over
the THTA pulse and the discharge regime changes
toward a better plasma confinement with a relatively
high electron temperature.
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
0
1
2
3
4
5
6
7
8
– n
e
,
1
0
1
2
c
m
-3
UK2 , kV
1
2
3
Fig. 3. 1 – mean electron density
en ; 2 – ECE; 3 – PDF
(Is) versus anode voltage UK2 at fixed UK1 = 5 кV. The
values of
en , ЕСЕ и Is were taken at t = 32.5 ms where
en took a maximum at UK2 = 5 kV (see Fig. 2,a). The
mean electron density is in units of 10
12
cm
–3
, while the
other quantities are in arbitrary units
ISSN 1562-6016. ВАНТ. 2014. №6(94) 5
A short-time
en increase after RF pulse termination
with a subsequent slower density decay that is observed
in Fig. 2,c (UK2 = 7.5 kV) and at higher UK2 (see
Fig. 2,d; 8.5 kV) result from a plasma loss decrease
after the end of RF heating. This is evidenced by a rapid
(~ 1 ms) PDF drop. With this, the temperature of the
cooling electrons still is high enough to ionize neutrals
that enter continuously the confinement volume (see,
e.g., [9]). The absence of the “recombination”
maximum of the CIII emission as well as the absence of
the afterglow plasma density increase after K2 switched
off in high density regimes (Figs. 2,a,b) evidence the
presence of a low electron temperature before RF off.
In Fig. 3 plots are shown of ECE, PDF (current Is) and
en against UK2 made from the data similar to those shown in
Fig. 2. The values of the parameters were taken at the
moment 32.5 ms, where
en passed over the maximum at the
lowest anode voltage UK2 = 5kV (see Fig. 2,а). It is seen that
with PK2 (voltage UK2) increasing, ECE, plasma loss and
en
behave qualitatively like behavior of these parameters in the
FA-driven discharge when going from the regime 2 to the
regime 1 (Fig. 5 in [6]).
0
1
2
3
4
5
6
7
8
9
10
20 25 30 35 40 45 50
0
1
2
3
4
5
6
7
8
9
10
20 25 30 35 40 45 50
K2K1
1
2
a b
K2K1
1
2
c
Time, ms
– n
e
,
1
0
1
2
c
m
-3
K2
K1
1
2
d
K2K1
1
2
Fig. 4. Time evolution of 1 – mean electron density en and 2 – 2nd harmonic ECE from the central region at fixed
UK1 = 5.0 kV, UK2 = 9.0 and with (а) t0 = t1 = 28 мс; (b) t0 = t1 = 30 мс; (c) t0 = t1 = 34 мс; (d) t0 = 30 мс,
t1 = 34 мс. The mean electron density is in units of 10
12
cm
–3
, while the other signals are in arbitrary units
3. INITIAL ELECTRON TEMPERATURE EFFECT
ON PLASMA HEATING WITH THTA
With fixed UK1 = 5 kV (РК1 45 kW),
UK2 = 9 kV ( 350 kW) and р = 1.05 × 10
-5
Тоrr, the
time t0 was increased from shot to shot. Accordingly,
the moment t1 = t0 was shifted (Figs. 4,а-c), and the FA-
driven RF discharge went from the regime 1 with a high
initial ECE (see Fig. 4,а: t0 = 28 ms, ЕСЕ 3.2 a.u.) to
the regime 2 with initial ECE decreasing to 0.7 a.u. at
t0 = 30 ms (see Fig. 4,b) and to the level 0.2 a.u.
comparable with interference at t0 = 34 ms (see
Fig. 4,c). Both the initial density
0en and the density
en
corresponding to the measured ECE maximum with
THTA in operation changed within relatively small
limits (4.2…5.5) × 10
12
cm
-3
and were lower than the
values
en ~ (7…8) × 10
12
cm
-3
, where the cut off effect
on the ECE level supposedly expected.
As is seen in Figs. 4,а-c, the maximum ЕСЕ attained
with THTA in operation, weakly depends on the initial
value, amounting 8-9 a.u. with a discharge regime
similar to the regime 1 of the FA-driven discharge.
It is appropriately also to present here the data taken
from other measurement session where UK1 = 6 kV,
UK2 = 9 kV (see Fig. 4,d). Here the moments t0 = 30 ms
and t1 = 35 ms were separated, so that the oscillator K2
was switched on in the phase of the afterglow plasma
produced by FA with an ultimately low initial ECE. In
these conditions the maximum ECE attained with
THTA in operation (7.5 a.u.) also is close to the values
attained in the t0 = t1 conditions.
4. INITIAL PLASMA DENSITY EFFECT
ON DENSITY AND HEATING
OF THE THTA-DRIVEN PLASMA
As in Sec. 3 with respect to the initial ECE, with
fixed UK1 = 5 kV and UK2 = 9 kV various
0en values
were selected by changing t0 and t1. In contrast to Sec. 2
and 3, here the measurements were carried out at the
higher p = 1.15 × 10
-5
Тоrr. This enabled to widen the
limits of considered
0en values from 3.5 × 10
12
cm
-3
at
t0 = t1 = 26 ms (Fig. 5,а, regime 1) to 5.7 × 10
12
cm
-3
at
t0 = t1 = 30 ms (see Fig. 5,b, regime 2) and to
6 ISSN 1562-6016. ВАНТ. 2014. №6(94)
6.4 × 10
12
cm
-3
at t0 = 28 ms and t1 = 30 ms (see Fig. 5,c,
the THTA pulse was applied to the afterglow plasma).
The initial ECE decayed with
0en increase. Basing
on the Sec. 3 data, one can suppose, however, that in the
conditions under consideration where max
en ~ (7…8) × 10
12
cm
-3
is achieved with THTA in
operation (see Figs. 5,b,c) and Те estimation by ЕСЕ
becomes incorrect, the electron temperature also weakly
depends on the initial value.
0
1
2
3
4
5
6
7
8
9
10
K1
K2
1
23
a
0
1
2
3
4
5
6
7
8
9
10
n
e
,1
0
1
2
c
m
-3
K1
K2
1
2
3
b
20 25 30 35 40 45 50
0
1
2
3
4
5
6
7
8
9
10
Time, ms
K1
K2
1
2
3
c
Fig. 5. Time evolution of 1, mean electron density
en , 2,
2nd harmonic ECE, 3, PDF current Is depending on the
times t0 of K1 switched off and t1 of K2 switched on:
(а) t1 = t0 = 26 ms; (b) t1 = t0 = 30 ms; (c) t0 = 28 мс,
t1= 30 мс. The mean electron density is in units of
10
12
cm
–3
, while the other signals are in arbitrary units
At the lowest value
0en = 3.5 × 10
12
cm
-3
(see
Fig. 5,а) with RF voltage applied to THTA, ЕСЕ
undergoes 1.5-fold increase from the initial value
to 6.5 a.u. and afterwards weakly changes to the end
of the RF pulse by analogy with the regime 1 of the
initial discharge. At the same time, PDF (current Is),
after passing over the maximum in the 1st half of the
THTA RF pulse, undergoes ~ 2 times decrease. The
decrease of the plasma loss results in a density rise to
en = 5.0 × 10
12
cm
-3
. As it has been already mentioned
above (see Sec. 2 and Fig. 2,d), this is an indication of
plasma confinement improvement at a relatively high
electron temperature. With a higher
0en ~ 6 × 10
12
cm
-3
,
the density
en increases during the THTA pulse to
~ 8.0 × 10
12
cm
-3
(see Figs. 5,b,c). Taking account of a
relatively high PDF level in the active phase of the
discharge and a finite, though lower, level of ECE
together with a short-time
en rise after RF pulse
termination, some electron heating could be supposed to
occur in these conditions as well.
SUMMARY AND DISCUSSION
To find out possible regimes of the RF discharge
driven by the three-half-turn antenna (THTA), time
evolution has been studied of the average electron
density
en , the intensity of the electron cyclotron
emission ECE (radiation temperature) from the central
region of the plasma column, and the plasma loss from
the confinement volume (plasma divertor flow PDF –
current Is ) depending on the frame-antenna-produced
initial values of ECE and the mean density
0en as well
as RF power PK2 fed to the antenna (anode voltage UK2
of the oscillator K2).
With fixed or weakly varying for the time of
measurements initial plasma parameters and low values
of PK2 (voltage UK2), the THTA-driven discharge is in
the regime similar to the regime 2 of the initial
discharge (see Figs. 2,a,b). In this regime
en continues
to grow and passes over the maximum
(8…8.5) × 10
12
см
-3
. Judging on the low plasma loss,
during the most part of the RF pulse the plasma remains
cold, while the predominant fraction of the RF power
РК2 coming to the confinement volume is spent for
ionization of the neutral hydrogen, continuously
entering this volume from the ambient space, as it has
been already discussed in [6] for the FA-antenna-
produced discharge.
With РК2 increasing, heating of the plasma (in part
electrons, by the level of ECE) results in the loss
increase, that is evidenced by slowing-down of the
en
rise and the PDF increase. Finally, at a fixed pressure p
the loss of the plasma is no more compensated by
ionization of the coming neutrals. The slowing down of
the density rise is replaced by its decay, and the mean
plasma density lowers to
en ~ 4 × 10
12
cm
-3
in the
middle of the RF pulse, with Te
rad
being approximately
2 times as high as the initial one (see Figs. 2,c,d). As a
result, the discharge goes to the regime similar to the
regime 1 during FA operation [6]. A new effect here are
indications of the hot plasma confinement improvement
during evolution of the THTA-driven discharge.
With RF voltage being applied to THTA at different
values of the initial ECE, it is shown that the resultant
heating of the electrons weakly depends on their initial
temperature (see Fig. 4). As follows from Figs. 4,c,d a
high heating occurs even at ultimately low values of the
initial electron temperature.
Basing on results of studies of the density
0en effect
on the density and temperature of the THTA-driven
ISSN 1562-6016. ВАНТ. 2014. №6(94) 7
plasma with using available diagnostics, we can state
reliably that a plasma with high radiation temperature
and the density up to
en ~ 5 × 10
12
cm
-3
can be produced
within the range of
0en (3.5…5) × 10
12
cm
-3
(see Fig. 5,a, see, also, [8]) against
en ~ (1…3) × 10
12
cm
-3
in the FA-produced discharge
in the regime 1 [6]. At
0en > 5 × 10
12
cm
-3
the mean
density produced by THTA can be raised to
~ 8 × 10
12
cm
-3
. However, the method of electron
temperature estimation used here does not allow to
deduce a reliable conclusion about the level of electron
heating at such a high density. Nevertheless, with the
final values of ECE and plasma loss together with the
mean electron density rise after the end of RF pulse (see
Figs. 5,b, c) taken into account, a certain plasma heating
with THTA should be expected even at
en ~ 8 × 10
12
cm
-3
. It seems that to realize the problem
which THTA has been designed for, namely, production
of the hot plasma with the mean density up to ~ 10
13
cm
-3
,
it is the regimes shown in Figs. 5,b, c that are the most
promising.
When saying about optimum parameters of the
initial frame-antenna-driven discharge to produce
denser and hotter plasmas with the three-half-turn
antenna, a conclusion could be made that even an
afterglow plasma can be used as a target. This allows to
produce the initial plasma using an ultimately low RF
power PK1 that provides a stable discharge ignition and
brings the initial mean density to ~ (5…6) × 10
12
cm
-3
in
the regime 2.
REFERENCES
1. O.M. Shvets, I.A. Dikij, S.S. Kalinichenko, et al. //
Nucl. Fusion. 1986, v. 26, p. 23.
2. V.V. Chechkin, L.I. Grigor’eva, M.S. Smirnova, et al.
// Nucl. Fusion. 2002, v. 42, p. 192.
3. V.V. Chechkin, I.M. Pankratov, L.I. Grigor’eva, et al.
// PAST. Ser. “Plasma Physics”. 2012, № 6, p. 3.
4. V.E. Moiseenko // VIII IAEA Stellarator Workshop,
Kharkov, 1991, Vienna: IAEA, 1991, p. 207.
5. S.V. Kasilov, A.I. Lysoivan, V.E. Moiseenko,
V.V. Plyusnin // Stellarator and Other Helical
Confinement Systems. Collection of Papers Presented at
the IAEA TCM, Garching, Germany, 10-14 May 1993.
Vienna: IAEA, 1993, p. 277.
6. V.V. Chechkin, L.I. Grigor’eva, R.O. Pavlichenko, et
al. // Plasma Phys. Reports. 2014, v. 40, № 8, p. 697.
7. A.I. Lysoivan, V.E. Moiseenko, V.V. Plyusnin, et al.
// Fusion Eng. Des. 1995, v. 26, p. 185.
8. V.E. Moiseenko, V.L. Berezhnyj, V.N. Bondarenko,
et al. // Nucl. Fusion. 2011, v. 51, p. 083036.
9. V.S. Voitsenya, A.N. Shapoval, R.O. Pavlichenko, et
al. // Phys. Scr. 2011, v. T161, p. 014009.
Article received 20.09.2014
ХАРАКТЕРНЫЕ СВОЙСТВА ВЧ-РАЗРЯДА, ПОДДЕРЖИВАЕМОГО ТРЕХПОЛУВИТКОВОЙ
АНТЕННОЙ В ТОРСАТРОНЕ УРАГАН-3М
В.В. Чечкин, Л.И. Григорьева, Д.Л. Греков, Р.О. Павличенко, A.В. Лозин, A.A. Kaсилов,
A.A. Белецкий, M.M. Koзуля, A.Е. Kулага, Н.В. Заманов, И.К. Тарасов, Ю.К. Миронов,
В.С. Романов, В.С. Войценя
В трехзаходном торсатроне Ураган-3М водородная плазма создается и нагревается ВЧ-полями в области
альфвеновских частот ( ≲ сi). Плазма со средней плотностью
en единицы 10
12
см
-3
создается рамочной
антенной и используется как исходная для получения и нагрева более плотной плазмы (до
en ~ 10
13
см
-3
) с
помощью более коротковолновой трехполувитковой антенны с азимутальными токами. Экспериментально
исследуются характеристики ВЧ-разряда, поддерживаемого трехполувитковой антенной, в зависимости от
ВЧ-мощности, подводимой к антенне, и параметров исходной плазмы.
ХАРАКТЕРНІ ВЛАСТИВОСТІ ВЧ-РОЗРЯДУ, ЩО ПІДТРИМУЄТЬСЯ ТРЬОХНАПІВВИТКОВОЮ
АНТЕНОЮ В ТОРСАТРОНІ УРАГАН-3М
В.В. Чечкін, Л.І. Григор’єва, Д.Л. Греков, Р.О. Павличенко, О.В. Лозін, A.A. Kaсілов,
О.О. Білецький, M.M. Koзуля, A.Є. Kулага, М.В. Заманов, І.К. Тарасов, Ю.К. Миронов,
В.С. Романов, В.С. Войценя
У трьохзаходному торсатроні Ураган-3М воднева плазма створюється і гріється ВЧ-полями в області
альфвенівських частот ( ≲ сi). Плазма з середньою щільністю
en одиниці 10
12
см
-3
створюється рамковою
антеною і використовується як початкова для одержання та нагріву щільнішої плазми (до
en ~ 10
13
см
-3
) за
допомогою більш короткохвильової трьохнапіввиткової антени з азимутальними струмами.
Експериментально досліджуються характеристики ВЧ-розряду, який підтримується трьохнапіввитковою
антеною, в залежності від ВЧ-потужності, що підводиться до антени, та параметрів початкової плазми.
|
| id | nasplib_isofts_kiev_ua-123456789-81165 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016. ВАНТ. 2014. №6(94) |
| language | English |
| last_indexed | 2025-12-07T15:36:18Z |
| publishDate | 2014 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Chechkin, V.V. Grigor’eva, L.I. Grekov, D.L. Pavlichenko, R.O. Lozin, A.V. Kasilov, A.A. Beletskii, A.A. Kozulya, M.M. Kulaga, A.Ye. Zamanov, N.V. Tarasov, I.K. Mironov, Yu.K. Romanov, V.S. Voitsenya, V.S. 2015-05-11T20:05:44Z 2015-05-11T20:05:44Z 2014 Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron / V.V. Chechkin, L.I. Grigor’eva, D.L. Grekov, R.O. Pavlichenko, A.V. Lozin, A.A. Kasilov, A.A. Beletskii, M.M. Kozulya, A.Ye. Kulaga, N.V. Zamanov, I.K. Tarasov, Yu.K. Mironov, V.S. Romanov, V.S. Voitsenya // Вопросы атомной науки и техники. — 2014. — № 6. — С. 3-7. — Бібліогр.: 9 назв. — англ. 1562-6016. ВАНТ. 2014. №6(94) PACS: 52.25.Fi, 52.55.Hc, 52.55.Pi, 52.70.Pi https://nasplib.isofts.kiev.ua/handle/123456789/81165 In the λ = 3 Uragan-3M torsatron hydrogen plasma is heated by RF fields in the Ålfven range of frequencies (ω≤ωсi). Plasma with the mean density ‾ne units of 10¹² сm⁻³ is produced by the frame antenna and used as an initial plasma (“target”) to produce and heat a denser plasma (up to ‾ne ~ 10¹³ сm⁻³) by means of the shorter wavelength three-half-turn antenna with azimuthal currents. Characteristics of the three-half-turn-antenna-driven discharge are studied experimentally depending on the RF power fed to the antenna and initial plasma parameters. В трехзаходном торсатроне Ураган-3М водородная плазма создается и нагревается ВЧ-полями в области альфвеновских частот (ω≤ωсi). Плазма со средней плотностью ‾ne единицы 10¹² см⁻³ создается рамочной антенной и используется как исходная для получения и нагрева более плотной плазмы (до ‾ne ~ 10¹³ см⁻³) с помощью более коротковолновой трехполувитковой антенны с азимутальными токами. Экспериментально исследуются характеристики ВЧ-разряда, поддерживаемого трехполувитковой антенной, в зависимости от ВЧ-мощности, подводимой к антенне, и параметров исходной плазмы. У трьохзаходному торсатроні Ураган-3М воднева плазма створюється і гріється ВЧ-полями в області альфвенівських частот (ω≤ωсi). Плазма з середньою щільністю ‾ne одиниці 10¹² см⁻³ створюється рамковою антеною і використовується як початкова для одержання та нагріву щільнішої плазми (до ‾ne ~ 10¹³ см⁻³) за допомогою більш короткохвильової трьохнапіввиткової антени з азимутальними струмами. Експериментально досліджуються характеристики ВЧ-розряду, який підтримується трьохнапіввитковою антеною, в залежності від ВЧ-потужності, що підводиться до антени, та параметрів початкової плазми. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Магнитное удержание Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron Характерные свойства ВЧ-разряда, поддерживаемого трехполувитковой антенной в торсатроне Ураган-3М Характерні властивості ВЧ-розряду, що підтримується трьохнапіввитковою антеною в торсатроні Ураган-3М published earlier |
| spellingShingle | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron Chechkin, V.V. Grigor’eva, L.I. Grekov, D.L. Pavlichenko, R.O. Lozin, A.V. Kasilov, A.A. Beletskii, A.A. Kozulya, M.M. Kulaga, A.Ye. Zamanov, N.V. Tarasov, I.K. Mironov, Yu.K. Romanov, V.S. Voitsenya, V.S. Магнитное удержание |
| title | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron |
| title_alt | Характерные свойства ВЧ-разряда, поддерживаемого трехполувитковой антенной в торсатроне Ураган-3М Характерні властивості ВЧ-розряду, що підтримується трьохнапіввитковою антеною в торсатроні Ураган-3М |
| title_full | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron |
| title_fullStr | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron |
| title_full_unstemmed | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron |
| title_short | Characteristic properties of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron |
| title_sort | characteristic properties of the three-half-turn-antenna-driven rf discharge in the uragan-3m torsatron |
| topic | Магнитное удержание |
| topic_facet | Магнитное удержание |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/81165 |
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