Development of a superconducting magnetic system of a plasma mass-separator
The paper presents the design and parameters of a superconducting magnetic system of a mass-separator with a maximum magnetic field value of about 5 and 3 T in the separation area. The magnetic system is designed for a NbTi copper-stabilized superconductor; for current leads HTSC is used. The stor...
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| Опубліковано в: : | Вопросы атомной науки и техники |
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| Дата: | 2006 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Англійська |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2006
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Development of a superconducting magnetic system of a plasma mass-separator / V.О. Ilichova, O.S. Druj, V.B. Yuferov, S.V. Sharyi // Вопросы атомной науки и техники. — 2006. — № 2. — С. 110-112. — Бібліогр.: 3 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859901042170265600 |
|---|---|
| author | Ilichova, V.О. Druj, O.S. Yuferov, V.B. Sharyi, S.V. |
| author_facet | Ilichova, V.О. Druj, O.S. Yuferov, V.B. Sharyi, S.V. |
| citation_txt | Development of a superconducting magnetic system of a plasma mass-separator / V.О. Ilichova, O.S. Druj, V.B. Yuferov, S.V. Sharyi // Вопросы атомной науки и техники. — 2006. — № 2. — С. 110-112. — Бібліогр.: 3 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | The paper presents the design and parameters of a superconducting magnetic system of a mass-separator with a
maximum magnetic field value of about 5 and 3 T in the separation area. The magnetic system is designed for a NbTi
copper-stabilized superconductor; for current leads HTSC is used. The stored energy is 6 MJ. Heat inputs to the
surfaces with T of 4.5 and 40 K are equal to 1 and 50 W, respectively.
Представлены конструкция и параметры сверхпроводящей магнитной системы сепаратора изотопов с
максимальной величиной магнитного поля ~5 и 3 Тл в области сепарации. Магнитная система расcчитана на
Nb-Ti сверхпроводник, стабилизированный медью; для токовводов используется ВТСП. Запасенная энергия
составляет ~ 6 МДж. Теплоподводы к поверхностям с температурой 4.5 и 40 К равны 1 и 50 Вт
Представлені конструкція та параметри надпровідної магнітної системи сепаратора ізотопів з
максимальним значенням магнітного поля біля ~5 та 3 Тл в області сепарації. Магнітна система розрахована
на Nb-Ti надпровідник, стабілізований міддю; для струмовводів використовується ВТНП. Запасена енергія
становить ~ 6 МДж. Теплопідводи до поверхонь з температурою 4.5 та 40К становлять 1 та 50 Вт.
|
| first_indexed | 2025-12-07T15:57:52Z |
| format | Article |
| fulltext |
DEVELOPMENT OF A SUPERCONDUCTING MAGNETIC SYSTEM
OF A PLASMA MASS-SEPARATOR
V.О. Ilichova, O.S. Druj, V.B. Yuferov, S.V. Sharyi
NSC KIPT, Kharkov, Ukraine
E-mail: v.yuferov@kipt.kharkov.ua
The paper presents the design and parameters of a superconducting magnetic system of a mass-separator with a
maximum magnetic field value of about 5 and 3 T in the separation area. The magnetic system is designed for a Nb-
Ti copper-stabilized superconductor; for current leads HTSC is used. The stored energy is 6 MJ. Heat inputs to the
surfaces with T of 4.5 and 40 K are equal to 1 and 50 W, respectively.
PACS: 28.60.+s
1. INTRODUCTION
A problem of producing isotope-pure materials and
isotopes as well as developing the methods for their pro-
duction is the problem of today. Electromagnetic separ-
ators (plasma separators being a promising version) and
electromagnetic methods of isotope separation are con-
tinuously upgrading.
Previous papers [1-3] were devoted to consideration
of plasma separators with cyclotron heating of compon-
ents. In the present paper we continue to consider a su-
perconducting magnetic system (SCMS) of the separat-
or [3] making it possible to reduce significantly the
power consumption, mentioned in [1], in the case of us-
ing SC magnets. Development of materials and techno-
logies promote the advancement in this field simplifying
the conduct of operations and decreasing the cost of
magnetic systems developed for different applications,
for example, induction linacs, stellarators, torsatrons,
separators, etc.
2. SC MAGNETIC SYSTEM
A schematic view of the superconducting system of
the plasma mass-separator is presented in Fig.1. A re-
quired magnetic field configuration (Fig.2), capable to
be modified in the general case, is formed by 5 wind-
ings placed, in a special manner, along the field axis.
The windings are laying-out in a single cryostat. The
walls of a “warm” hole in the cryostat are cooled by a
water flow, as they are the walls of the plasma source
and of the separator. The superconducting magnetic sys-
tem wound on the aluminium cylinder, being cooled by
the helium flow through pipes welded on the heat con-
tact, is placed inside of the radiation shield with a tem-
perature of 30…40 K. The shield, in its turn, is heat-in-
sulated from the external walls of the vacuum object us-
ing a multilayer superinsulation with the heat input of
about 1.5 W/m2 in the temperature difference range
from 300 to 40 К.
Fig.1. The cross-cut of the superconducting magnetic system
___________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 2.
Series: Nuclear Physics Investigations (46), p.110-112.
Radiation shield 30 -40К
Aluminum cylinder 4 -7К
Superconducting solenoid
Internal wall surface (T=300К)
Superconducting mirror solenoids Heat
superinsulation Coolants
310 cm
∅
60 cm
№3 №2
№4 №5 №1
110
SCMS and the thermal screen are mounted on the
thermoforce supports inside the special space in the va-
cuum chamber interior.
Requirements to the magnetic field homogeneity
when conducting operations with heavy isotopes are on
the level ∆B/B =10-2…5⋅10-3, that is sufficiently simply
provided in the system where the winding is applied
with turns touching. (The wire diameter/chamber dia-
meter ratio is at a level of 3⋅10-3 and the plasma diamet-
er/winding diameter is approximately 0.8). At the same
time in the region of the plasma source (PS), in the re-
gion of the collisional plasma the homogeneous field is
not necessary. Here, the control of output plasma para-
meters can be performed with the help of high-gradient
and periodical magnetic field (Fig.2). It is seen from the
figure that the value and topography of the magnetic
field in the PS region is controlled by three solenoids
№1, №3, №4. The region of the homogeneous magnetic
field is controlled, besides the above-mentioned solen-
oids, by the solenoids №2, №5. In addition, the value of
the magnetic moment of ions, contained in the separa-
tion area, can be controlled, too [2].
Fig2. The axial topography of the magnetic field
of system with 5 solenoids
An important feature in developing SCMS is the
current leads which also determine the parameters and
operating properties of the system. For our work we se-
lect the current leads with the use of HTSC having a
critical temperature of 80…100 K. In this case they de-
crease, almost to zero, the heat input through the current
leads to the helium system, as at a temperature of the
thermal screen T=30…40 K they are superconducting,
not requiring the coolant flow for their operation. They
are superconducting up to 80…100 K and, therefore, the
heat load to the thermal screen significantly decreases,
too. However, it is essential that there is not necessity to
lower the values of a transport current along the wind-
ings (in order the heat load be decreased).Thus, the in-
ductivities of magnetic system sections, and of the sys-
tem on the whole, can be decreased. Consequently, it
will be possible not only to decrease the voltages at cur-
rent leads in the case of emergency power release from
the solenoids, proportional to U= L dI/dt, but, also, to
increase the transport current density in the winding, or
the safety factor − the ratio of the transport current in
the winding to the current of the short specimen, It.c/Iss.
An important moment for the safe operation of
SCMS with high values of the critical current and en-
ergy is the system of energy release. Since, while SCMS
transition into the normal state, because of low velocit-
ies of normal phase propagation, Vϕ, VR, VZ, are at a
level of 20…23 сm/s, 1…3 сm/s and 3…5 сm/s, re-
spectively, the normal phase will occupy an insignific-
ant part of the volume throughout the system at a high
temperature values. Indeed, at a given current density
values the rate of winding heating is approximately
50 K/s, and the energy, released during the first second,
does not reach even 1 kJ. By that time, at this temperat-
ure the values of arising thermal stresses do not exceed
yet the strength of the winding, however, this value, in
the process of making the system, cannot be controlled,
and, therefore, a high safety factor is expedient. It is not
desirable to exceed the above-mentioned values because
then the risk of the system failure can take place. To
prevent this, the control and safety system, responsible
for the SCMS transition into the normal phase, must
connect SCMS in time of about 0.1 s, with the external
nonlinear resistance, to which during ~1 s, at a constant
voltage, the stored energy is leaded. If the total stored
energy is released in the winding, then its temperature
increases up to 50 K.
Before we have shown that at rates of energy release
of about 1…3 T/s it is possible to lead out up to 80% of
the stored energy from the system while the simultan-
eous transition of the entire SC-winding into the “nor-
mal” state. For this purpose the electrical insulation of
windings should be performed by 12…15 kV, the en-
ergy is leaded out from the windings simultaneously.
For the winding we used a cable having the copper-
superconductor ratio at a level of 12, diameter 2 mm,
varnish insulation and current-carrying capacity, see
Table 1.
Table 1. I vs. B of Nb-Ti cable
I (A ) 1.05⋅103 6.5⋅102 2.0⋅102
B (T ) 3 5 8
As is seen from Fig.2 a part of the solenoid №2
winding is in the zone of 5 T, therefore the winding of
this solenoid can made with cables of variable cross-
section for the field region of 3 T and 5 T, respectively.
Thus, the saving of the SC cable can be appreciable, as
this section of the winding is almost 40% of the total
weight of the system and its optimization can decrease
its cost.
So, the SCMS parameters should be as follows:
length of the system – 310 cm; diameter of the “warm”
hole – 60 cm; maximum magnetic filed – 5 T; material
of the winding - niobium-titanium with the ratio to cop-
per – 12; stored energy – 6.0 MJ; structural current
density – 1.5⋅104 А/сm2. The weight of the SC part of
the cable winding – 700 kg, of the electric insulation
material – up to 80 kg, of the aluminium frame –
180 kg; total summary weight of the cryostat part
at 4.5 K – up to 1000 kg.
In calculations for the heat inputs to the cryostat
with T=4.5 K we have taken into account the radiating
heat input and heat input by the supports. In calculations
of heat inputs to the radiation shield the contribution of
current leads was also taken into account. The heat input
0
20
40
60
0 100 200 300 400
z,cm
111
H
,k
O
e
to the cryostat with T=4.5 K is of about 1 W, the heat
input to the thermal screen with T=30 K is 50 W.
The axial topography of the magnetic field was calcu-
lated by the method of superposition of fields from
single-turn solenoids. The parameters of solenoids №1-5
for the maximum filed of 5 T are given in Table 2.
Table 2. Parameters of solenoids
solenoid №1 №2 №3 №4 №5
N*I, *106
(А-turns)
3 4.5 1.625 1.125 1
I(А ) 600 600 600 600 1000
L(H ) 7.0 11 5.8 2.75 0.75
W (MJ) 1.3 2 1.05 0.5 0.4
Vacuum in the cryostat is maintained due to the use
of sorption internal pumps located at the surfaces with
T=30 K and 4.5 K. The length of the SC cable is
~23 km. At the cost of the Nb-Ti superconductor of
~2 $/kА•m and the cost of HTSCs of ~100 $/kА•m
(length up to 10 m), the cost of the SC winding is estim-
ated at a level of ~$50 thousands.
REFERENCES
1. V.I. Volosov, I.A. Kotelnikov, I.N. Churkin et al.
Facility for isotope separation // Atomnaya En-
ergiya. 2000, v.88, №5. p.370-378 (in Russian).
2. А.N. Dovbnya, О.S. Druj, А.М. Yegorov et al.
Comparative analysis of projects for plasma sep-
arators of isotopes with cyclotron frequency os-
cillations // Problems of Atomic Science and
Technology. Series: Plasma electronics and new
acceleration methods. 2004, №4(3), p.323-325.
3. V.B. Yuferov, D.V. Vinnikov, О.S. Druj et al.
Resonance plasma separator for isotope separa-
tion. Choice of parameters // Vestnik NTU KhPI.
Series: Electric power and converting technique.
2004, №35, p.169-179.
СВЕРХПРОВОДЯЩАЯ МАГНИТНАЯ СИСТЕМА ПЛАЗМЕННОГО СЕПАРАТОРА ИЗОТОПОВ
В.О. Ильичева, О.С. Друй, В.Б. Юферов, C.B. Шарый
Представлены конструкция и параметры сверхпроводящей магнитной системы сепаратора изотопов с
максимальной величиной магнитного поля ~5 и 3 Тл в области сепарации. Магнитная система расcчитана на
Nb-Ti сверхпроводник, стабилизированный медью; для токовводов используется ВТСП. Запасенная энергия
составляет ~ 6 МДж. Теплоподводы к поверхностям с температурой 4.5 и 40 К равны 1 и 50 Вт.
НАДПРОВІДНА МАГНІТНА СИСТЕМА ПЛАЗМОВОГО СЕПАРАТОРА ІЗОТОПІВ
В.О. Ільічова, О.С. Друй, В.Б. Юферов, C.B. Шарий
Представлені конструкція та параметри надпровідної магнітної системи сепаратора ізотопів з
максимальним значенням магнітного поля біля ~5 та 3 Тл в області сепарації. Магнітна система розрахована
на Nb-Ti надпровідник, стабілізований міддю; для струмовводів використовується ВТНП. Запасена енергія
становить ~ 6 МДж. Теплопідводи до поверхонь з температурою 4.5 та 40К становлять 1 та 50 Вт.
PACS: 28.60.+s
|
| id | nasplib_isofts_kiev_ua-123456789-78864 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T15:57:52Z |
| publishDate | 2006 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Ilichova, V.О. Druj, O.S. Yuferov, V.B. Sharyi, S.V. 2015-03-22T08:48:39Z 2015-03-22T08:48:39Z 2006 Development of a superconducting magnetic system of a plasma mass-separator / V.О. Ilichova, O.S. Druj, V.B. Yuferov, S.V. Sharyi // Вопросы атомной науки и техники. — 2006. — № 2. — С. 110-112. — Бібліогр.: 3 назв. — англ. 1562-6016 PACS: 28.60.+s https://nasplib.isofts.kiev.ua/handle/123456789/78864 The paper presents the design and parameters of a superconducting magnetic system of a mass-separator with a maximum magnetic field value of about 5 and 3 T in the separation area. The magnetic system is designed for a NbTi copper-stabilized superconductor; for current leads HTSC is used. The stored energy is 6 MJ. Heat inputs to the surfaces with T of 4.5 and 40 K are equal to 1 and 50 W, respectively. Представлены конструкция и параметры сверхпроводящей магнитной системы сепаратора изотопов с максимальной величиной магнитного поля ~5 и 3 Тл в области сепарации. Магнитная система расcчитана на Nb-Ti сверхпроводник, стабилизированный медью; для токовводов используется ВТСП. Запасенная энергия составляет ~ 6 МДж. Теплоподводы к поверхностям с температурой 4.5 и 40 К равны 1 и 50 Вт Представлені конструкція та параметри надпровідної магнітної системи сепаратора ізотопів з максимальним значенням магнітного поля біля ~5 та 3 Тл в області сепарації. Магнітна система розрахована на Nb-Ti надпровідник, стабілізований міддю; для струмовводів використовується ВТНП. Запасена енергія становить ~ 6 МДж. Теплопідводи до поверхонь з температурою 4.5 та 40К становлять 1 та 50 Вт. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Линейные ускорители заряженных частиц Development of a superconducting magnetic system of a plasma mass-separator Сверхпроводящая магнитная система плазменного сепаратора изотопов Надпровідна магнітна система плазмового сепаратора ізотопів Article published earlier |
| spellingShingle | Development of a superconducting magnetic system of a plasma mass-separator Ilichova, V.О. Druj, O.S. Yuferov, V.B. Sharyi, S.V. Линейные ускорители заряженных частиц |
| title | Development of a superconducting magnetic system of a plasma mass-separator |
| title_alt | Сверхпроводящая магнитная система плазменного сепаратора изотопов Надпровідна магнітна система плазмового сепаратора ізотопів |
| title_full | Development of a superconducting magnetic system of a plasma mass-separator |
| title_fullStr | Development of a superconducting magnetic system of a plasma mass-separator |
| title_full_unstemmed | Development of a superconducting magnetic system of a plasma mass-separator |
| title_short | Development of a superconducting magnetic system of a plasma mass-separator |
| title_sort | development of a superconducting magnetic system of a plasma mass-separator |
| topic | Линейные ускорители заряженных частиц |
| topic_facet | Линейные ускорители заряженных частиц |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/78864 |
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