System of spectrally pure hydrogen inflow for Uragan-3M torsatron
The used today system of hydrogen inflow into Uragan-3M torsatron (U-3M) vacuum chamber does not provide the needed purity of hydrogen during plasma experiments. In view of this, the simple construction of a diffusion Pdmembrane module system for spectrally pure hydrogen inflow was suggested and sim...
Збережено в:
| Опубліковано в: : | Вопросы атомной науки и техники |
|---|---|
| Дата: | 2000 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2000
|
| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/78495 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | System of spectrally pure hydrogen inflow for Uragan-3M torsatron / G.P. Glazunov, E.D. Volkov, D.I. Baron // Вопросы атомной науки и техники. — 2000. — № 6. — С. 50-51. — Бібліогр.: 3 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-78495 |
|---|---|
| record_format |
dspace |
| spelling |
Glazunov, G.P. Volkov, E.D. Baron, D.I. 2015-03-18T16:06:45Z 2015-03-18T16:06:45Z 2000 System of spectrally pure hydrogen inflow for Uragan-3M torsatron / G.P. Glazunov, E.D. Volkov, D.I. Baron // Вопросы атомной науки и техники. — 2000. — № 6. — С. 50-51. — Бібліогр.: 3 назв. — англ. 1562-6016 https://nasplib.isofts.kiev.ua/handle/123456789/78495 533.9 The used today system of hydrogen inflow into Uragan-3M torsatron (U-3M) vacuum chamber does not provide the needed purity of hydrogen during plasma experiments. In view of this, the simple construction of a diffusion Pdmembrane module system for spectrally pure hydrogen inflow was suggested and simulation experiments with experimental module were carried out. The tests on the special stand and in the U-3M vacuum vessel have showed such performances of the experimental module at T = 650°C and 1 at. hydrogen pressure: power for heating is ≈200 watt, hydrogen flow through membrane Q ≈ 1 Torr.l/s (specific hydrogen flow through membrane q ≈ 5.10-2 Torr.l/s.cm2). The preliminary results obtained in this work have given the possibility to start the work design and construction of the system for inflow of spectrally pure hydrogen for the U-3M torsatron. Some details of this system are presented. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Magnetic confinement System of spectrally pure hydrogen inflow for Uragan-3M torsatron Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron |
| spellingShingle |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron Glazunov, G.P. Volkov, E.D. Baron, D.I. Magnetic confinement |
| title_short |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron |
| title_full |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron |
| title_fullStr |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron |
| title_full_unstemmed |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron |
| title_sort |
system of spectrally pure hydrogen inflow for uragan-3m torsatron |
| author |
Glazunov, G.P. Volkov, E.D. Baron, D.I. |
| author_facet |
Glazunov, G.P. Volkov, E.D. Baron, D.I. |
| topic |
Magnetic confinement |
| topic_facet |
Magnetic confinement |
| publishDate |
2000 |
| language |
English |
| container_title |
Вопросы атомной науки и техники |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| format |
Article |
| description |
The used today system of hydrogen inflow into Uragan-3M torsatron (U-3M) vacuum chamber does not provide the needed purity of hydrogen during plasma experiments. In view of this, the simple construction of a diffusion Pdmembrane module system for spectrally pure hydrogen inflow was suggested and simulation experiments with experimental module were carried out. The tests on the special stand and in the U-3M vacuum vessel have showed such performances of the experimental module at T = 650°C and 1 at. hydrogen pressure: power for heating is ≈200 watt, hydrogen flow through membrane Q ≈ 1 Torr.l/s (specific hydrogen flow through membrane q ≈ 5.10-2 Torr.l/s.cm2). The preliminary results obtained in this work have given the possibility to start the work design and construction of the system for inflow of spectrally pure hydrogen for the U-3M torsatron. Some details of this system are presented.
|
| issn |
1562-6016 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/78495 |
| citation_txt |
System of spectrally pure hydrogen inflow for Uragan-3M torsatron / G.P. Glazunov, E.D. Volkov, D.I. Baron // Вопросы атомной науки и техники. — 2000. — № 6. — С. 50-51. — Бібліогр.: 3 назв. — англ. |
| work_keys_str_mv |
AT glazunovgp systemofspectrallypurehydrogeninflowforuragan3mtorsatron AT volkoved systemofspectrallypurehydrogeninflowforuragan3mtorsatron AT barondi systemofspectrallypurehydrogeninflowforuragan3mtorsatron |
| first_indexed |
2025-11-25T20:39:24Z |
| last_indexed |
2025-11-25T20:39:24Z |
| _version_ |
1850525513722888192 |
| fulltext |
UDC 533.9
50 Problems of Atomic Science and Technology. 2000. № 6. Series: Plasma Physics (6). p. 50-51
SYSTEM OF SPECTRALLY PURE HYDROGEN INFLOW FOR
URAGAN-3M TORSATRON
G.P. Glazunov, E.D. Volkov, D.I. Baron
Institute of Plasma Physics of NSC KhIPT, 61108 Kharkov, Ukraine
e-mail: glazunov@ipp.kharkov.ua
The used today system of hydrogen inflow into Uragan-3M torsatron (U-3M) vacuum chamber does not provide
the needed purity of hydrogen during plasma experiments. In view of this, the simple construction of a diffusion Pd-
membrane module system for spectrally pure hydrogen inflow was suggested and simulation experiments with
experimental module were carried out. The tests on the special stand and in the U-3M vacuum vessel have showed
such performances of the experimental module at T = 650°C and 1 at. hydrogen pressure: power for heating is ≈200
watt, hydrogen flow through membrane Q ≈ 1 Torr.l/s (specific hydrogen flow through membrane q ≈ 5.10-2
Torr.l/s.cm2). The preliminary results obtained in this work have given the possibility to start the work design and
construction of the system for inflow of spectrally pure hydrogen for the U-3M torsatron. Some details of this
system are presented.
1. Introduction
The today system of hydrogen inflow into Uragan-
3M torsatron (U-3M) vacuum chamber was made of
hydrogen inlet from a high pressure vessel through
automatic inlet system. However, even if the high purity
hydrogen is contain in a high pressure vessel, such
system does not provide the needed purity of hydrogen
during plasma experiments (usually about a few
percents of impurities) . So the value of the most
experimental results comes lower and a new system for
spectrally pure hydrogen inflow is needed. It is the main
reason that in this work the new diffusion Pd-membrane
module system for spectrally pure hydrogen inflow was
suggested and the simulation experiments with the
experimental module of such system were carried out.
2. Conception and design
The usually used for spectrally pure hydrogen inflow
Pd-membranes have thickness about 1 mm ( in order to
provide the long life time and reliability). However, it is
the difficult task to release the high required hydrogen
flow Q ( up to 5 Torr.l/s) for the U-3M by the use of
such membranes (one must remember that Q ~ d-1). In
this work the utilizing of the rather thin Pd-membrane
0.1-0.25 mm thickness is suggested. And, in order to
provide the required reliability, the special procedure of
membrane heating and pumping of dissolved hydrogen
is anticipated. This excludes the possibility of
membrane disruption due to α-β transition in Pd. To
exclude of heavy Pd-atom input into plasma volume it is
suggested to use the TiN-coated palladium membranes.
The block-scheme of suggested system is shown in
Fig.1. System comprises a block of diffusion
membranes, which includes six diffusion modules, each
of other has independent heating system. There are also
the hydrogen pressure and temperature control systems,
and pumping system to provide the functioning of
diffusion modules. If it is needed the automatic systems
can be used to keep the temperature and hydrogen
pressure regime of diffusion module (pushed in the
Fig.1). Also one can use the scheme with hydrogen
generation block through the use of a palladium
membrane and ethyl alcohol vapors. It was
demonstrated earlier [1] that at an optimum ethyl
alcohol vapor pressure and a membrane temperature
such hydrogen generation scheme can provide
hydrogen flow about 1 Torr.l/s for one Pd-membrane
with surface area ≈ 20 cm2 . But some additional
investigations to be carried out to clarify the influence
of carbon, releasing on the membrane surface due to
ethyl vapor dehydration and thermal decomposition of
ethylene, on the kinetics of hydrogen generation and
penetration.
3. Experimental set-up
The experimental module (Fig.2) comprises a
diffusion membrane (Pd-99.98 grade pipes 0.6 cm in
diameter, 19 cm 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 of
high pressure vessel. The experimental modules under
studies were also with the similar palladium pipes
coated with a 3-µm-thick TiN layer. The membrane was
heated by directly running the current through it. The
temperature was controlled by chromel-Copel
thermocouple located inside the pipe.
The tests of above mentioned diffusion module on
the special stand, the scheme of which is similar to that
described in [1] and in the U-3M vacuum vessel have
showed such performances at T=650°C and 1 at.
hydrogen pressure: power for heating is ≈200 watt,
hydrogen flow through membrane Q ≈ 1 Torr.l/s
(specific hydrogen flow through membrane q ≈ 5.10-2
Torr.l/s.cm2). The H2 pressure increase up to 2.10-5 Torr
was observed in the U-3M vacuum chamber during such
hydrogen inlet. Taking into account the net hydrogen
pumping speed ~ 105 l/s in the U-3M vacuum chamber
and ~ 5.10-4 Torr hydrogen pressure needed during
experiments, the total number five/six of mentioned
modules are necessary in order to get the required
hydrogen flow 5 Torr.l/s into the U-3M vacuum
chamber. The diffusion module performances can be
mailto:glazunov@ipp.kharkov.ua
51
improved by utilizing of more thin (up to 0.1 mm in U-
3M) Pd-pipes with larger diameter as the membrane
thickness d dependence of Q is Q ~ d-1. The hydrogen
pressure dependence of hydrogen flow through
membrane is Q ~ p0.5. More detail description of
hydrogen behavior in Pd-membranes and TiN-coated
Pd-membranes is given in [2,3].
Fig. 1. Block-scheme of experimental set-up
Fig.2. Experimental diffusion module
Conclusion
The preliminary results obtained in this work has
shown the principal possibility for creation of a work
system of spectrally pure hydrogen inflow for the U-
3M torsatron . The nearest future steps in this
direction will be the work design, construction and
mounting of such system.
References
[1] G.P.Glazunov, E.D. Volkov, D.I. Baron. Study of
low hydrogen flows into high-vacuum systems. Int. J.
Hydrogen Energy. 1999, v. 24, p. 829-831.
[2] G.P.Glazunov. Hydrogen permeation through
palladium after hydrogen-thermal treatment and
exposure to a plasma of glow discharge in hydrogen,
helium and argon. J. Hydrogen Energy, 1997, v. 20
No 2/3, p. 263-268.
[3] G.P.Glazunov, E.D. Volkov, V.P. Veremeenko et
al. Erosion and outgassing behavior of TiN-coated
plasma facing components of the Uragan-3M
torsatron. 14th Int. Conf. on Plasma Surface
Interactions in Controlled Fusion Devices,
Rosenheim, Germany, May 22-26, 2000, Book of
Abstracts, P-3.18, to be published in J. Nucl. Mater.
H
2
Diffusion membrane
block
Uragan-3M vacuum
chamber
Pressure control
system
Pumping systemHeating system
Hydrogen
generation
system
Automatic
pressure
control
Automatic
temperature
control
Temperature
control
system
Heating
Diffusion membrane
Thermocouple
Insulator
F
Fig. 1. Block-scheme of experimental set-up
|