Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron
The tests of the pure hydrogen inflow system had been carried out during pulsed discharge cleaning and work regimes of the Uragan-3M torsatron. It had been shown that the inflow system provides required steady flows of hydrogen over the pressure range from 5x10⁻⁷ Torr to 10⁻⁴ Torr. The special cycli...
Saved in:
| Published in: | Вопросы атомной науки и техники |
|---|---|
| Date: | 2005 |
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2005
|
| Subjects: | |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/79532 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron / G.P. Glazunov, E.D. Volkov, D.I. Baron, N.P. Ponomarenko // Вопросы атомной науки и техники. — 2005. — № 2. — С. 96-97. — Бібліогр.: 6 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859619684469440512 |
|---|---|
| author | Glazunov, G.P. Volkov, E.D. Baron, D.I. Ponomarenko, N.P. |
| author_facet | Glazunov, G.P. Volkov, E.D. Baron, D.I. Ponomarenko, N.P. |
| citation_txt | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron / G.P. Glazunov, E.D. Volkov, D.I. Baron, N.P. Ponomarenko // Вопросы атомной науки и техники. — 2005. — № 2. — С. 96-97. — Бібліогр.: 6 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | The tests of the pure hydrogen inflow system had been carried out during pulsed discharge cleaning and work regimes of the Uragan-3M torsatron. It had been shown that the inflow system provides required steady flows of hydrogen over the pressure range from 5x10⁻⁷ Torr to 10⁻⁴ Torr. The special cyclic procedures of membrane heating and pumping to provide the long life time of membranes, and required reliability and stable flow are described.
Проведено іспити системи напуску чистого водню в робочому режимі й у режимі чищення високочастотними імпульсами торсатрону Ураган-3М. Показано, що система напуску забезпечує необхідні потоки в діапазоні тисків 5x10⁻⁷ – 10-⁻⁴ Торр. Для забезпечення необхідної надійності, тривалості терміну служби і стабільності потоку водню пропонується спеціальна процедура періодичного нагрівання і відкачки дифузійних мембран.
Проведены испытания системы напуска чистого водорода в рабочем режиме и в режиме чистки высокочастотными импульсами торсатрона Ураган-3М. Показано, что система напуска обеспечивает требуемые потоки в диапазоне давлений 5x10⁻⁷ – 10⁻⁴ Торр. Для обеспечения требуемой надежности, продолжительности срока службы и стабильности потока водорода предлагается специальная процедура периодического нагрева и откачки диффузионных мембран.
|
| first_indexed | 2025-11-29T03:08:55Z |
| format | Article |
| fulltext |
TEST OF PURE HYDROGEN INFLOW SYSTEM DURING DISCHARGE
CLEANING AND WORK REGIMES OF THE URAGAN-3M TORSATRON
G.P. Glazunov, E.D. Volkov, D.I. Baron, N.P. Ponomarenko
Institute of Plasma Physics, NSC KIPT, Kharkov, Ukraine
The tests of the pure hydrogen inflow system had been carried out during pulsed discharge cleaning and work
regimes of the Uragan-3M torsatron. It had been shown that the inflow system provides required steady flows of
hydrogen over the pressure range from 5x10-7 Torr to 10–4 Torr. The special cyclic procedures of membrane heating and
pumping to provide the long life time of membranes, and required reliability and stable flow are described.
PACS: 52.40.Hf
1. INTRODUCTION
Earlier the simple construction of the diffusion
membrane module system for pure hydrogen inflow in the
Uragan-3M (U-3M) torsatron had been suggested and
simulation experiments with experimental module were
carried out [1]. The results obtained in that work had
shown the principal possibility of such system creation
with the required characteristics for the U-3M torsatron.
Then the real construction have been designed,
manufactured and mounted in the U-3M device. In this
work the tests of the system were carried out during pulsed
RF-discharge cleaning and work regimes of the U-3M
torsatron at the typical parameters [2, 3].
2. EXPERIMENTAL
The principle scheme of inflow system is shown in
Fig.1. System comprises a block of diffusion membranes,
which includes seven diffusion modules M1-M7, each of
other is attached through valves to independent heating
system (not shown), to hydrogen input line (V1-V7, VH)
and to pumping line (V0) to provide the functioning of
diffusion modules. There was the possibility to control
membrane heating and pressure in the U-3M vacuum
chamber from the diagnostic room. The diffusion module
comprises a diffusion membrane (Pd-99.98 grade pipes
0.6 cm in diameter, 19cm length, 0.025 cm in thickness)
which was hermetically brazed at the one end. The outer
surface of pipe was presented to the vacuum chamber,
while the inner surface was in contact with hydrogen from
high-pressure cylinder. The membrane was heated by
directly running the current through it. In order to
decrease arc ignition probability during plasma
experiments and to prevent heavy impurities incoming in
plasma, the palladium pipes were coated with a 2-4 µm
thick TiN layer. Earlier the TiN-coatings were
successfully applied in the U-3M to protect RF antenna
frames [4] from erosion and it was shown earlier [5] that
TiN-films have very low level of arc ignition probability
and rather high barrier for molecular hydrogen
penetration. The latter required to examine comparison
characteristics of hydrogen permeability (isobars and
isotherms, activation energies Ea) of such membranes and
bare Pd-membranes. It is seen in Fig.2 and in the Table
that at the medium high temperatures (300-500°C) these
performances are nearest ones. For comparison the
activation energy values Em for activated palladium [6]
are presented in the Table, too.
Activation energy values of hydrogen permeability for Pd
and (2µ TiN)-Pd
Membrane
material
Ea,
Kcal/mol
Em,
Kcal/mol
Ref.
Pd 10.4 3.7 [6]
(2µ TiN)-Pd 5.46 3.6 [5]
The activation energy E of hydrogen permeability was
determined from the slope of ln(j)=-b-E/RT straight lines
as functions of the inverse temperature (Fig.2). For bare
palladium the activation energy E was calculated to be
(10.4±0.52) kcal/mol that is much higher than 3-4 kcal/mol
reported in [6]. It could be explained by higher carbon
concentration on the inner surface of Pd-pipes and
nonactivated state of palladium.
The tests were carried out under typical parameters
for RF-discharge cleaning and work regimes in the U-3M
[2, 3]: for the former it was 1 pulse per 5 s, RF input
power was ~ 50kW, discharge duration was up to 60ms,
the stationary magnetic field was over the range from
250-350 Gs; for the latter it was 1 pulse per 5 minute, RF
power was about 240 kW, discharge duration was 50ms,
magnetic field was 0.7 Gs.
The tests had been shown that the inflow system
provided steady flows of hydrogen over the pressure
range from 5x10-7 Torr to 10–4 Torr. Under RF-discharge
cleaning regime in the Uragan-3M torsatron (hydrogen
pressure was 10-4 Torr) five or six diffusion modules were
required to provide the necessary flow about 10 Torr·l/s.
.
Fig.1. The scheme of the hydrogen inflow system
96 Problems of Atomic Science and Technology. Series: Plasma Physics (11). 2005. № 2. P. 96-97
Fig.2. Permeability isobars (hydrogen pressure
P=760 Torr): closed circles – bare Pd, open circles – (2µ
m TiN)-Pd bimetallic system.
Under plasma experiment condition (required
hydrogen pressure was 10–5 Torr) only one or two
modules were used, providing hydrogen flow about
1Torr·l/s. The maximum power consumption at the work
of one and six diffusion modules (without power of
forevacuum pump) was not more than 60W and 400W,
consequently.
As the construction of the diffusion modules is not
gas-flow, the decay of permeation properties of diffusion
modules was observed caused by impurity release
(mainly, carbon) on the inlet surface of Pd-membrane. To
provide the required stable flow, the special cyclic
procedure of membrane heating in hydrogen atmosphere
and pumping was applied. It allowed to have steady state
hydrogen flow through experiment.
The second problem was the utilizing of the rather
thin palladium tubes (0.25mm thickness) in diffusion
modules. It was caused by the necessary to provide high
hydrogen flows up to 10 Torr·l/s. To provide the long
lifetime and reguired high reliability of such membranes
it was needed to exclude the membrane work in the
temperature range of α-β transition (20-300°C) at high
hydrogen pressure. So, before the system shutoff the
special procedure of diffusion membranes heating and
pumping of dissolved hydrogen had been anticipated.
3. SUMMARY
The system of pure hydrogen input had been designed,
manufactured and mounted in the Uragan-3M device. The
compises seven diffusion modeles, lines of forevacuum
pumpdown, lines of letting-to-ballon hydrogen and
seven independent systems of diffusion module heating.
The tests of the pure hydrogen inflow system had been
carried out during pulsed discharge cleaning and work regimes
of the Uragan-3M torsatron. It had been shown that the inflow
system provides required steady flows of hydrogen over the
pressure range from 5x10-7 to 10–4 Torr required reability due
to the special cyclic procedures of membrane heating and
pumping.
REFERENCES
1. G.P.Glazunov et al. // Problems of Atomic Science and
Technology. Series: “Plasma Physics” (6). 2000, N6,
p.50-51.
2. E.D.Volkov et al. // Proc. of Int. Conf. on Phenomena
in Ionized Gases, July, 11-16, 1999, Warsaw, Poland.
Contributed papers. 1999, v.1, p.205-206.
3. V.V. Chechkin et al. // Problems of Atomic Scince and
Technology. Series: “Plasma Physics” (7). 2000, N7,
p.48-50.
4. V.V. Vasil’ev et al. // J. Nucl. Mater. 1989, v.162-164,
p. 787-790.
5. G.P. Glazunov et al. // J. Nucl. Mater. 2001, v.290-293,
p. 266-270.
6. G.P.Glazunov // Int. J. of Hydrogen Energy. 1997,
v.20, No 2/3, p. 263-268.
ИСПЫТАНИЕ СИСТЕМЫ НАПУСКА ЧИСТОГО ВОДОРОДА В РАБОЧЕМ РЕЖИМЕ
И РЕЖИМЕ ЧИСТКИ ТОРСАТРОНА УРАГАН-3М
Г.П. Глазунов, Е.Д. Волков, Д.И. Барон, Н.П. Пономаренко
Проведены испытания системы напуска чистого водорода в рабочем режиме и в режиме чистки
высокочастотными импульсами торсатрона Ураган-3М. Показано, что система напуска обеспечивает
требуемые потоки в диапазоне давлений 5x10-7 – 10-4 Торр. Для обеспечения требуемой надежности,
продолжительности срока службы и стабильности потока водорода предлагается специальная процедура
периодического нагрева и откачки диффузионных мембран.
ІСПИТ СИСТЕМИ НАПУСКУ ЧИСТОГО ВОДНЮ В РОБОЧОМУ РЕЖИМІ
І РЕЖИМІ ЧИЩЕННЯ ТОРСАТРОНА УРАГАН-3М
Г.П. Глазунов, Є.Д. Волков, Д.І. Барон, М.П. Пономаренко
Проведено іспити системи напуску чистого водню в робочому режимі й у режимі чищення
високочастотними імпульсами торсатрону Ураган-3М. Показано, що система напуску забезпечує необхідні
потоки в діапазоні тисків 5x10-7 – 10-4 Торр. Для забезпечення необхідної надійності, тривалості терміну служби
і стабільності потоку водню пропонується спеціальна процедура періодичного нагрівання і відкачки
дифузійних мембран.
97
|
| id | nasplib_isofts_kiev_ua-123456789-79532 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-11-29T03:08:55Z |
| publishDate | 2005 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Glazunov, G.P. Volkov, E.D. Baron, D.I. Ponomarenko, N.P. 2015-04-02T18:53:18Z 2015-04-02T18:53:18Z 2005 Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron / G.P. Glazunov, E.D. Volkov, D.I. Baron, N.P. Ponomarenko // Вопросы атомной науки и техники. — 2005. — № 2. — С. 96-97. — Бібліогр.: 6 назв. — англ. 1562-6016 PACS: 52.40.Hf https://nasplib.isofts.kiev.ua/handle/123456789/79532 The tests of the pure hydrogen inflow system had been carried out during pulsed discharge cleaning and work regimes of the Uragan-3M torsatron. It had been shown that the inflow system provides required steady flows of hydrogen over the pressure range from 5x10⁻⁷ Torr to 10⁻⁴ Torr. The special cyclic procedures of membrane heating and pumping to provide the long life time of membranes, and required reliability and stable flow are described. Проведено іспити системи напуску чистого водню в робочому режимі й у режимі чищення високочастотними імпульсами торсатрону Ураган-3М. Показано, що система напуску забезпечує необхідні потоки в діапазоні тисків 5x10⁻⁷ – 10-⁻⁴ Торр. Для забезпечення необхідної надійності, тривалості терміну служби і стабільності потоку водню пропонується спеціальна процедура періодичного нагрівання і відкачки дифузійних мембран. Проведены испытания системы напуска чистого водорода в рабочем режиме и в режиме чистки высокочастотными импульсами торсатрона Ураган-3М. Показано, что система напуска обеспечивает требуемые потоки в диапазоне давлений 5x10⁻⁷ – 10⁻⁴ Торр. Для обеспечения требуемой надежности, продолжительности срока службы и стабильности потока водорода предлагается специальная процедура периодического нагрева и откачки диффузионных мембран. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Basic plasma physics Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron Іспит системи напуску чистого водню в робочому режимі і режимі чищення торсатрона Ураган-3М Испытание системы напуска чистого водорода в рабочем режиме и режиме чистки торсатрона Ураган-3М Article published earlier |
| spellingShingle | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron Glazunov, G.P. Volkov, E.D. Baron, D.I. Ponomarenko, N.P. Basic plasma physics |
| title | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron |
| title_alt | Іспит системи напуску чистого водню в робочому режимі і режимі чищення торсатрона Ураган-3М Испытание системы напуска чистого водорода в рабочем режиме и режиме чистки торсатрона Ураган-3М |
| title_full | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron |
| title_fullStr | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron |
| title_full_unstemmed | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron |
| title_short | Test of pure hydrogen inflow system during dischare cleaning and work regimes of the Uragan-3M torsatron |
| title_sort | test of pure hydrogen inflow system during dischare cleaning and work regimes of the uragan-3m torsatron |
| topic | Basic plasma physics |
| topic_facet | Basic plasma physics |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79532 |
| work_keys_str_mv | AT glazunovgp testofpurehydrogeninflowsystemduringdischarecleaningandworkregimesoftheuragan3mtorsatron AT volkoved testofpurehydrogeninflowsystemduringdischarecleaningandworkregimesoftheuragan3mtorsatron AT barondi testofpurehydrogeninflowsystemduringdischarecleaningandworkregimesoftheuragan3mtorsatron AT ponomarenkonp testofpurehydrogeninflowsystemduringdischarecleaningandworkregimesoftheuragan3mtorsatron AT glazunovgp íspitsisteminapuskučistogovodnûvrobočomurežimíírežimíčiŝennâtorsatronauragan3m AT volkoved íspitsisteminapuskučistogovodnûvrobočomurežimíírežimíčiŝennâtorsatronauragan3m AT barondi íspitsisteminapuskučistogovodnûvrobočomurežimíírežimíčiŝennâtorsatronauragan3m AT ponomarenkonp íspitsisteminapuskučistogovodnûvrobočomurežimíírežimíčiŝennâtorsatronauragan3m AT glazunovgp ispytaniesistemynapuskačistogovodorodavrabočemrežimeirežimečistkitorsatronauragan3m AT volkoved ispytaniesistemynapuskačistogovodorodavrabočemrežimeirežimečistkitorsatronauragan3m AT barondi ispytaniesistemynapuskačistogovodorodavrabočemrežimeirežimečistkitorsatronauragan3m AT ponomarenkonp ispytaniesistemynapuskačistogovodorodavrabočemrežimeirežimečistkitorsatronauragan3m |