Ions acceleration in a temporary and spatially modulated intense REB
The conception, proposed by Lymar, Khizhnyak, and Belikov, to use collective electromagnetic fields of space charge excited in high-current relativistic electron beam (REB), modulated in time and space, have been experimentally investigated. At plasma assistance the low frequency oscillations of 4...
Gespeichert in:
| Veröffentlicht in: | Вопросы атомной науки и техники |
|---|---|
| Datum: | 2004 |
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2004
|
| Schlagworte: | |
| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/80452 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Ions acceleration in a temporary and spatially modulated intense REB / P.T. Chupikov, D.V. Medvedev, I.N. Onishchenko, B.D. Panasenko, Yu.V. Prokopenko, S.S. Pushkarev, A.M. Yegorov // Вопросы атомной науки и техники. — 2004. — № 4. — С. 113-117. — Бібліогр.: 8 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859878110936170496 |
|---|---|
| author | Chupikov, P.T. Medvedev, D.V. Onishchenko, I.N. Panasenko, B.D. Prokopenko, Yu.V. Pushkarev, S.S. Yegorov, A.M. |
| author_facet | Chupikov, P.T. Medvedev, D.V. Onishchenko, I.N. Panasenko, B.D. Prokopenko, Yu.V. Pushkarev, S.S. Yegorov, A.M. |
| citation_txt | Ions acceleration in a temporary and spatially modulated intense REB / P.T. Chupikov, D.V. Medvedev, I.N. Onishchenko, B.D. Panasenko, Yu.V. Prokopenko, S.S. Pushkarev, A.M. Yegorov // Вопросы атомной науки и техники. — 2004. — № 4. — С. 113-117. — Бібліогр.: 8 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | The conception, proposed by Lymar, Khizhnyak, and Belikov, to use collective electromagnetic fields of space
charge excited in high-current relativistic electron beam (REB), modulated in time and space, have been experimentally investigated. At plasma assistance the low frequency oscillations of 46 MHz are excited in the overcritical
REB. The flow of C⁺ ions accelerated by the space charge field of virtual cathode up to 500 keV with density of
6×10⁶ cm⁻³ was formed. The fluence of ions on the collector during the ion pulse has the value 5×10⁷ particles/cm². The
periodic magnetic field with 12% modulation was created by a sequence of aluminum and iron rings. After acceleration in the section with temporary and spatially modulated REB ions achieved energy 1.5 MeV and ion current 1 A.
Експериментально досліджена запропонована Хижняком і інш. концепція використання колективних
електромагнітних полів просторового заряду в сильнострумовому РЕП, модульованому в часі та просторі.Наявність віртуального катоду та плазмового джерела дозволили промодулювати РЕП на частоті 46 МГц і
прискорити іони C⁺ до 500 кеВ. В другій секції, що складається із 9 змінних періодів магнітного поля, ці іони
досягали енергії 1.5 МеВ при струмі 1 А.
Экспериментально исследована предложенная Хижняком и др. концепция использования коллективных
электромагнитных полей пространственного заряда в сильноточном РЭП, модулированном во времени и
пространстве. Наличие виртуального катода и плазменного источника позволили промодулировать РЭП на
частоте 46 МГц и ускорить ионы C⁺ до 500 кэВ. Во второй секции, состоящей из 9 переменных периодов
магнитного поля, эти ионы ускорялись до энергии 1.5 МэВ при токе 1 А.
|
| first_indexed | 2025-12-07T15:51:38Z |
| format | Article |
| fulltext |
IONS ACCELERATION IN A TEMPORARY AND SPATIALLY MODU-
LATED INTENSE REB
P.T. Chupikov, D.V. Medvedev, I.N. Onishchenko, B.D. Panasenko,
Yu.V. Prokopenko, S.S. Pushkarev, A.M. Yegorov
NSC "Kharkov Institute of Physics and Technology"
Akademic St. 1, 61108, Kharkov, Ukraine;
E-mail: onish@kipt.kharkov.ua
The conception, proposed by Lymar, Khizhnyak, and Belikov, to use collective electromagnetic fields of space
charge excited in high-current relativistic electron beam (REB), modulated in time and space, have been experimen-
tally investigated. At plasma assistance the low frequency oscillations of 46 MHz are excited in the overcritical
REB. The flow of C+ ions accelerated by the space charge field of virtual cathode up to 500 keV with density of
6×106 cm-3 was formed. The fluence of ions on the collector during the ion pulse has the value 5×107 particles/cm2. The
periodic magnetic field with 12% modulation was created by a sequence of aluminum and iron rings. After accelera-
tion in the section with temporary and spatially modulated REB ions achieved energy 1.5 MeV and ion current 1 A.
PACS: 29.27.-а
1. INTRODUCTION
The idea to create the space charge slow-wave aris-
ing at temporary and spatial modulation of REB and use
it for ions acceleration was stated by Khizhnyak et al
[1]. One of the first attempt to perform state-of-art ex-
periment has been made in [2]. This work pursues the
object to continue these researches and clarify accelera-
tion mechanisms.
In the first section of the proposed ion accelerator
the collective fields are formed when an intense REB
with the current that exceeds the vacuum limiting cur-
rent is being injected into the drift chamber and thus vir-
tual cathode appears. Plasma source in the vicinity of
virtual cathode (VC) gives two virtues: firstly, accelera-
tion of plasma ions to the energy compared to the elec-
tron beam energy and thus realization ion injector, need-
ed for the second section of ion accelerator; secondly,
compensation the virtual cathode by plasma ions occurs
periodical because its compensation allows ions to run
away and the compensation process can repeat again.
The periodic compensation should lead to the temporal
modulation of electron beam current at low frequency
(LF). In the second section temporary modulated intense
REB is being modulated additionally in space during its
motion through the spatially periodical magnetic field.
Such double modulated REB can be considered as a
slow space charge wave whose phase velocity can be
resonantly adjusted to ions velocity by means of fre-
quency or/and spatial period variation [1,2].
The pulsed electron accelerator produces REB with
parameters: energy 280 keV, current 4.4 kA, pulse dura-
tion 0.8 µsec. VC in magnetically insulated diode was
realized by means of sharp change of drift chamber di-
ameter from 40 mm to 50 mm. The outer plasma source
consisted of 4 plasma guns for radial injection into VC
region to obtain accelerated ions and low frequency
REB modulation. The plasma density was 1012 cm-3.
At plasma assistance the low frequency oscillations
of 46 MHz are excited in the high-current REB. At the
exit of the first section the flow of C+ ions accelerated
by the space charge field of virtual cathode up to energy
490 keV with density of 6×106 cm-3 was formed. The
fluence of ions on the collector during the ion pulse has
the value 5×107 particles/cm2.
The periodic magnetic field was created by a se-
quence of aluminum and iron rings. The periodic mag-
netic field with 12% modulation was obtained. After ad-
ditional acceleration in the second section ions energy
1.5 MeV and ion current 1 A were achieved.
2. THE FIRST SECTION
WITH EXTERNAL PLASMA SOURCE
The structures with virtual cathode are successfully
applied in collective accelerators of charged particles
[3, 4]. Such structure serves as the first section of two-
sectioned collective ion accelerator (Fig. 1) based on
joint temporary and spatial modulation of REB. In such
accelerator the ions are accelerated by a field of space
charge slow wave generated in electron beam at its tem-
porary modulation by virtual cathode with plasma and
spatial modulation by spatially periodic magnetic struc-
ture. The mechanisms of the REB low frequency by the
field of virtual cathode that experiences periodical com-
pensation by plasma ions at low frequency were studied
theoretically and numerically [5, 6].
For REB producing the high-voltage pulse of Marx
generator with the amplitude of 280 V is supplied to the
magnetically-insulated diode on electron accelerator
"Agat". The cylindrical cathode has diameter of 31 mm
and depth of an emission edge of 0.1 mm. The entrance
diameter of cylindrical anode with 40 mm allows to take
the electron beam current of 4.4 kA. The inside diame-
ter of transport electron cylindrical liner is equal 50 mm
and the limit vacuum current is 3.4 kA for it. The jump
of electrodynamics’ structure provides the formation of
virtual cathode [7].
The electron beam was transported in a longitudinal
external magnetic field of the solenoid with inductance
of 810 µH. Magnetic field value of 1.33 T that was pro-
duced by the system of external magnetic field forma-
tion. The time period of the external magnetic field was
of 11.4 ms. In the cathode region the induction value of
___________________________________________________________
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2004. № 4.
Серия: Плазменная электроника и новые методы ускорения (4), с.113-117. 113
magnetic field has value 60% from induction value in-
side the solenoid. Such configuration of the magnetic
field formed the electron cylindrical beam with diameter
of 32 mm and wall thickness of 3 mm in the liner. In our
system the limiting current of electron beam is 3.4 kA.
3
II-section I-section
VC
PG
2
1
5
5 4
5
MG ASCS EMFF
Fig.1. Scheme of collective ion accelerator
MG-Marx generator; ASCS–accelerator starting and
control system; EMFF-external magnetic field forma-
tion; VC-virtual cathode; PG-plasma gun; 1 – magneti-
cally-insulated diode; 2 – solenoid; 3 – aluminum and
iron rings; 4 – high-voltage resistive divider; 5 – Ro-
govsky coil for Faraday cup current measuring
In the first section of the collective ion accelerator,
where ions are pre-accelerated by an electrostatic field
of a space charge of virtual cathode. Ions are extracted
from plasma cloud formed by an external plasma
source. The second consequence of plasma assistance
was a low frequency modulation of REB current due to
periodic compensation with plasma of VC space charge.
The plasma cloud was formed at synchronous
switching of four plasma guns. Plasma guns were
placed in the same plane on peripherals of the cylindri-
cal drift chamber. For tubular configuration of plasma
flow the dielectric insert was placed in the region of
plasma injection. The dielectric insert forms a tubular
flow of external plasma along force lines of an external
magnetic field.
At the absence of the dielectric insert plasma mov-
ing radially to the drift chamber axis forms a planar
plasma anode. In this case the maximum REB current at
the collector was registered that was almost equal to
maximum diode current. It means that at REB transport-
ing in the drift chamber with plasma filling the virtual
cathode did not appear.
The cylindrical dielectric insert has allowed to form
near-wall plasma tubular column. By change of longitu-
dinal size of the insert the different operational regimes
of the virtual cathode were realized. In experiments with
a lengthy dielectric insert a pulse of the collector current
on Faraday cup coincided to the pulse of REB without
external plasma. When the insert was shorter current
pulse on the collector the peak was observed (Fig.2, (3))
whose amplitude was equal to maximum value of the
diode current. It allowed to make a conclusion that for
this short time interval VC disappeared.
3. LF-MODULATION OF REB
The operation of accelerator comes to switching in
series pulses of magnetic field, plasma gun, and
diode. In Fig.2 the oscillograms of current pulses of
plasma gun (1), diode (2), and Faraday cup (3) are
shown. The time delay between pulses of currents
of the plasma gun and diode are chosen so that in-
jection of REB corresponds to the moment of
steady state of plasma density.
Fig.2. Time evolution of plasma gun, diode and
collector currents
Peak on the oscillogram of the current of Faraday
cup (3) corresponds to short-time disappearance of the
VC due to its charge compensation by plasma ions. The
time of 480 ns from the beginning of Faraday cup cur-
rent pulse to peak appearance is determined by the time
of motion of plasma ions from the plasma source to the
region of the virtual cathode.
Due to VC space charge compensation by plasma
ions, then relaxation and repeated ones REB experience
temporal modulation with frequency equaled inverse ion
time flight.
Fig.3. Low frequency modulation of REB
In Fig.3 the oscillograms of diode and Faraday cup
currents are shown. The lower oscillogram shows the
low frequency temporary modulation of REB current
obtained with a short length of the dielectric insert.
The modulation frequency of 46 MHz at modulation
depth 10% were observed in experiments.
Additional confirmation of low frequency REB
modulation was modulation of X-radiation on the same
__________________________________________________________________
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2004. № 4.
Серия: Плазменная электроника и новые методы ускорения (4), с.
118-122.
114
frequency. The REB produced the X-radiation at bom-
bardment of the target from stainless steel. X-radiation
registration technique used here is shown in paper [8].
In Fig. 4 the results obtained at presence of plasma from
the external source are shown.
1,5µ 2,0µ 2,5µ 3,0µ 3,5µ 4,0µ 4,5µ
-1,0
-0,5
0,0
0,5
2
1
V
ol
ta
ge
, V
Time, s
a
2,0x107 4,0x107 6,0x107 8,0x107 1,0x108
0,0
0,2
0,4
0,6
0,8
1,0
Frequency (Hz)
A
m
pl
itu
de
b
Fig.4. Pulses of input diode current (1) and
X-radiation (2) (a), and spectrum function
of X- radiation (b) with external plasma
The duration of REB current was equal to pulse
duration of the X-radiation and had value 0.8 µs close to
REB current duration. In Fig.4,b the spectrum function
of the X-radiation is shown with the maximum in the re-
gion of 46 MHz.
4. ENERGY OF IONS ACCELERATED BY A
SPACE CHARGE FIELD OF VC
For ions detection we used cellulose nitrate film that
was bombardment by ion flow. Ions tracks were ob-
tained after etching of the track detector in 10% NaOH
solution at temperature 60 C during 2 minutes. The im-
ages were observed by using the microscope.
For determination of ions energy, which were pre-
accelerated by space charge field of VC in the first sec-
tion of the accelerator, magnetic analyzer was used. Ki-
netic energy of ion is determined by the relation
2
2
1
= ⊥qB
l
L
m
W δ , (1)
where m , q , are mass, charge of the ion, δ is the
cross-sectional size of transversal magnetic field ⊥B , L
is the distance between the magnetic field and screen; l
is the deflection of ion from the initial direction, which
is registered on the screen. In our experiments the
screen was made from the cellulose nitrate that was also
the track detector of ion flow.
In our experiments the deflection system was used
with following parameters: ⊥B
=0.144 T; δ =40 mm;
L =40 cm. The width of the slot diaphragm placed be-
fore transversal magnetic field was equal 1 mm. For
one-charge ions of carbon С+ the deflection l was 6.08±
0.82 mm. Accordingly to (1) the estimated ion energy is
E ≈ 0.54±0.06 MeV.
Time-of-flight diagnostics were used for research of
ion velocity at exit of the first section of accelerator In
Fig. 5 the pulses registered by two grid probes of the
time-of-flight diagnostics.
250,00ns 500,00ns 750,00ns 1,00µs 1,25µs
0,0
0,2
0,4
0,6
0,8
2
1
V
ol
ta
ge
, V
Time
Fig.5. Pulses from first (1) and second (2) grid probes
of the unit for time-of-flight measurements
The time delay between pulses had the value within
180...200 ns. For the distance between grids 50 cm it
corresponded to ions velocity (2...2.5)×108 cm/s. If ions
were one-charged ions of carbon C+ (because plasma
was produced by evaporating and ionizing of plexiglas)
their energy was within 330...490 keV. The maximum
value of determined energy of ions was in agreement
with the energy measured by magnetic analyzer. Excess
of ions energy above energy of REB electrons testifies
about presence of the movement of negative potential
well created by the space charge of VC. In the case,
when the potential well and the ions are moved in the
same direction, the ions obtain additional energy. The
registered energy spread of one-charged carbon ions is
probably caused by the complicated self-consistent dy-
namics of the space charge potential of VC.
The estimations of ion density in ion flow
iicoliii mESqIn /2/= with the charge iq and mass
im at the exit of the first section of the collective ion ac-
celerator were based on measurements of ion energy iE
by magnetic analyzer and time-of-flight diagnostics and
___________________________________________________________
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2004. № 4.
Серия: Плазменная электроника и новые методы ускорения (4), с.113-117. 115
ion current iI registered by the Faraday cup with the
collector square of colS . The fluence of the ions
colSN / that have reached the collector was determined
by the relation coliicol SqISN // τ= , where N is total
number of ions; τ is the duration of ion pulse on half-
level of power. Besides, the fluence of ions was also de-
termined by the straight counting of the slides of ions
bombardment of the track detector. In the Table the re-
search results of the flow of one-charged carbon ions C+
pre-accelerated by the space charge field of virtual cath-
ode are shown. The ions were extracted from plasma
produced by REB bombardment of the special dielectric
(plexiglas) insert in the drift liner near the virtual
cathode location.
Energy,
keV
Current,
mA
Pulse dura-
tion, nsec
Ion density
cm-3
Fluence, ions/cm2
Collector
current
track detec-
tor
Fi
rs
t
se
ct
io
n
500 200 50 6,3×108 8,8×109 (5,6±0,5)×109
Se
co
nd
se
ct
io
n
N
=5 680 1600 60 4,3×109 8,45×1010 –
N
=9 1500 1000 40 1,8×109 3,52×1010 –
5. THE SECOND SECTION WITH PERIOD-
IC MAGNETIC FIELD
In collective ions accelerator being developed the
spatial modulation of REB is provided by the periodic
magnetic field of the second section. From synchronism
condition of a slow wave of space charge in REB and
accelerated ions the period of the external magnetic
field should be fvL i /= , where iv is the velocity of
ions pre-accelerated by space charge field of virtual
cathode, and f is the frequency of temporal modula-
tion of REB in the first section. In our experiments the
first section of the ions accelerator provides the tempo-
ral modulation of REB with frequency 46 MHz and the
energy of accelerated carbon ions C+ 500 keV. Period of
the external magnetic field should be L = 6 cm.
The section of modulated magnetic field with peri-
od of L is created by alternating iron and aluminum
rings, which are placed on the external surface of the
drift liner. The modulated structure of the external mag-
netic field 0H = 4.4 kOe consists of N=5 periods of iron
and aluminum rings with the longitudinal size of each
3 cm. The radial thickness of aluminum ring is 1 cm and
iron one is 0.5 cm. In Fig. 6 the distribution of the exter-
nal magnetic field along the liner of ions transporting is
shown.
It is seen that in the part with metal rings magnetic
field with 12% modulation as a whole twice less com-
paratively to magnetic field of solenoid. Period of mag-
netic field is determined by metal rings period. Maxi-
mum corresponds to Al-rings and minimum corresponds
to Fe-rings.
Propagating inside drift tube (diode anode) tubular
REB becomes modulated too. The form of REB tube
alog the axis was determined by means of portrait prints
of REB on the metallic plates placed at different dis-
tances from cathode. As it is seen from Fig. 7 REB is
modulated with increasing thickness of REB tube. How-
ever electrons didn’t follow magnetic field lines.
0 6 12 18 24 30 36 42 48 54 60 66
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
1,1
Aluminium
Ferrum
H
/H
0
z, cm
Magnetic field distribution
Fig.6. Magnetic field distribution along drift tube
In the second section ions gained additional energy
due to acceleration by space charge slow wave. It is
concluded from the results of ions energy and current
measurements represented in Table (second line). Ions
achieved energy 680 keV and current 1,6 A.
__________________________________________________________________
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2004. № 4.
Серия: Плазменная электроника и новые методы ускорения (4), с.
118-122.
116
0 6 12 18 24 30
0,0
0,2
0,4
0,6
0,8
1,0
1,2
1,4
1,6
1,8
2,0
2,2
2,4
2,6
Beam transport in the experiment
Aluminium
Ferrum
r,
cm
z, cm
Fig.7. Picture of REB propagation in drift tube
To prove the resonant character of accelerating by
traveling slow wave the length of the second section
was increased twice and modulation period was made
variable. Successive N=9 periods were equal to 6 cm,
6cm, 7cm, 7cm, 8cm, 8cm, 9cm, 9cm, 10cm. Magnetic
field distribution for this case is shown in Fig. 8.
0 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
1,1
Aluminium
Ferrum
H
/H
0
z, cm
Magnetic field distribution
Fig.8. Magnetic field distribution along drift tube at
twice enlarged second section
Results of ions acceleration in enlarged section are
represented in Table (third line). Energy of ions at exit
was 1,5 MeV, ion beam current 1 A. Ion beam duration
was one order less comparatively to REB pulse dura-
tion.
6. CONCLUSIONS
In the first section of collective ion accelerator the
low frequency REB modulation and the pre-acceleration
of ions were realized using an external plasma source.
The low frequency was observed on Faraday cup cur-
rent and on the spectrum of X-radiation. The modula-
tion frequency was near 46 MHz. Pre-accelerated ions
had energy 540 keV, registered by track detector (cellu-
lose) and measured by magnetic analyzer and flight-of-
time analyzer. In the second section consisted of 9 vari-
able length periods of magnetic field, ions gained ener-
gy up to 1.5 MeV, current 1 A, pulse duration 40 nsec.
This work was supported by STCU project #1569.
REFERENCES
1. A.G.Lymar, N.A.Khizhnyak, V.V.Belikov // VANT
Seria: “High-Energy Physics” 3(5), 78, 1973.
2. V.A.Balakirev, I.I.Magda, I.N.Onishchenko, S.S.-
Pushkarev, et al. // Plasma Physics. 1997, 23, 350.
3. W. Peter, R.J. Faehl, C. Snell et al. // IEEE Trans-
actions on Nuclear Science. 1985, v. NS-32, No.5,
p. 3506-3508.
4. V. A. Balakirev, A. M. Gorban, I. I. Magda et al. //
Plasma Physics Reports. 1997, v. 23, No.4, p. 323.
5. V.A. Balakirev, I.N. Onishchenko, N. Onishchenko
// Proc. of the 12th Int. Conf. "Microwave and
Telecommunication Technology". (Sevastopol,
Ukraine) September, 9-13, 2002, p.373-374.
6. P.I.Markov, I.N.Onishchenko, G.V.Sotnikov //
Technical Physics Letters. 2003, v.29, No.12,
p.967-970.
7. P.T.Chupikov, D.V.Medvedev, I.N.Onishchenko, et
al. // Problems of Atomic Science and Technology.
Series: “Plasma Physics” 2002, No.4, (7), p.132.
8. V.A. Bondarenko, I.I. Magda, S.I. Naisteter et al. //
Pribory i technika experimenta. 1979, No.2, p.261.
УСКОРЕНИЕ ИОНОВ В СИЛЬНОТОЧНОМ РЭП, МОДУЛИРОВАННОМ ВО ВРЕМЕНИ И ПРО-
СТРАНСТВЕ
П.Т. Чупиков, Д.В. Медведев, И.Н. Онищенко, Б.Д. Панасенко, Ю.В. Прокопенко,
С.С. Пушкарев, А.М. Егоров
Экспериментально исследована предложенная Хижняком и др. концепция использования коллективных
электромагнитных полей пространственного заряда в сильноточном РЭП, модулированном во времени и
пространстве. Наличие виртуального катода и плазменного источника позволили промодулировать РЭП на
частоте 46 МГц и ускорить ионы C+ до 500 кэВ. Во второй секции, состоящей из 9 переменных периодов
магнитного поля, эти ионы ускорялись до энергии 1.5 МэВ при токе 1 А.
ПРИСКОРЕННЯ ІОНІВ В СИЛЬНОСТРУМОВОМУ РЕП, МОДУЛЬОВАНОМУ В ЧАСІ ТА
ПРОСТОРІ
П.Т. Чупіков, Д.В. Мєдвєдєв, І.М. Онищенко, Б.Д. Панасенко, Ю.В. Прокопенко,
С.С. Пушкарьов, О.М. Єгоров
Експериментально досліджена запропонована Хижняком і інш. концепція використання колективних
електромагнітних полів просторового заряду в сильнострумовому РЕП, модульованому в часі та просторі.
___________________________________________________________
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2004. № 4.
Серия: Плазменная электроника и новые методы ускорения (4), с.113-117. 117
Наявність віртуального катоду та плазмового джерела дозволили промодулювати РЕП на частоті 46 МГц і
прискорити іони C+ до 500 кеВ. В другій секції, що складається із 9 змінних періодів магнітного поля, ці іони
досягали енергії 1.5 МеВ при струмі 1 А.
__________________________________________________________________
ВОПРОСЫ АТОМНОЙ НАУКИ И ТЕХНИКИ. 2004. № 4.
Серия: Плазменная электроника и новые методы ускорения (4), с.
118-122.
118
IONS ACCELERATION IN A TEMPORARY AND SPATIALLY MODULATED INTENSE REB
NSC "Kharkov Institute of Physics and Technology"
WITH EXTERNAL PLASMA SOURCE
Fig.3. Low frequency modulation of REB
REFERENCES
С.С. Пушкарьов, О.М. Єгоров
|
| id | nasplib_isofts_kiev_ua-123456789-80452 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T15:51:38Z |
| publishDate | 2004 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Chupikov, P.T. Medvedev, D.V. Onishchenko, I.N. Panasenko, B.D. Prokopenko, Yu.V. Pushkarev, S.S. Yegorov, A.M. 2015-04-18T04:58:37Z 2015-04-18T04:58:37Z 2004 Ions acceleration in a temporary and spatially modulated intense REB / P.T. Chupikov, D.V. Medvedev, I.N. Onishchenko, B.D. Panasenko, Yu.V. Prokopenko, S.S. Pushkarev, A.M. Yegorov // Вопросы атомной науки и техники. — 2004. — № 4. — С. 113-117. — Бібліогр.: 8 назв. — англ. 1562-6016 PACS: 29.27.-а https://nasplib.isofts.kiev.ua/handle/123456789/80452 The conception, proposed by Lymar, Khizhnyak, and Belikov, to use collective electromagnetic fields of space charge excited in high-current relativistic electron beam (REB), modulated in time and space, have been experimentally investigated. At plasma assistance the low frequency oscillations of 46 MHz are excited in the overcritical REB. The flow of C⁺ ions accelerated by the space charge field of virtual cathode up to 500 keV with density of 6×10⁶ cm⁻³ was formed. The fluence of ions on the collector during the ion pulse has the value 5×10⁷ particles/cm². The periodic magnetic field with 12% modulation was created by a sequence of aluminum and iron rings. After acceleration in the section with temporary and spatially modulated REB ions achieved energy 1.5 MeV and ion current 1 A. Експериментально досліджена запропонована Хижняком і інш. концепція використання колективних електромагнітних полів просторового заряду в сильнострумовому РЕП, модульованому в часі та просторі.Наявність віртуального катоду та плазмового джерела дозволили промодулювати РЕП на частоті 46 МГц і прискорити іони C⁺ до 500 кеВ. В другій секції, що складається із 9 змінних періодів магнітного поля, ці іони досягали енергії 1.5 МеВ при струмі 1 А. Экспериментально исследована предложенная Хижняком и др. концепция использования коллективных электромагнитных полей пространственного заряда в сильноточном РЭП, модулированном во времени и пространстве. Наличие виртуального катода и плазменного источника позволили промодулировать РЭП на частоте 46 МГц и ускорить ионы C⁺ до 500 кэВ. Во второй секции, состоящей из 9 переменных периодов магнитного поля, эти ионы ускорялись до энергии 1.5 МэВ при токе 1 А. This work was supported by STCU project #1569. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Новые методы ускорения заряженных частиц Ions acceleration in a temporary and spatially modulated intense REB Прискорення іонів в сильнострумовому РЕП, модульованому в часі та просторі Ускорение ионов в сильноточном РЭП, модулированном во времени и пространстве Article published earlier |
| spellingShingle | Ions acceleration in a temporary and spatially modulated intense REB Chupikov, P.T. Medvedev, D.V. Onishchenko, I.N. Panasenko, B.D. Prokopenko, Yu.V. Pushkarev, S.S. Yegorov, A.M. Новые методы ускорения заряженных частиц |
| title | Ions acceleration in a temporary and spatially modulated intense REB |
| title_alt | Прискорення іонів в сильнострумовому РЕП, модульованому в часі та просторі Ускорение ионов в сильноточном РЭП, модулированном во времени и пространстве |
| title_full | Ions acceleration in a temporary and spatially modulated intense REB |
| title_fullStr | Ions acceleration in a temporary and spatially modulated intense REB |
| title_full_unstemmed | Ions acceleration in a temporary and spatially modulated intense REB |
| title_short | Ions acceleration in a temporary and spatially modulated intense REB |
| title_sort | ions acceleration in a temporary and spatially modulated intense reb |
| topic | Новые методы ускорения заряженных частиц |
| topic_facet | Новые методы ускорения заряженных частиц |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/80452 |
| work_keys_str_mv | AT chupikovpt ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT medvedevdv ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT onishchenkoin ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT panasenkobd ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT prokopenkoyuv ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT pushkarevss ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT yegorovam ionsaccelerationinatemporaryandspatiallymodulatedintensereb AT chupikovpt priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT medvedevdv priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT onishchenkoin priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT panasenkobd priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT prokopenkoyuv priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT pushkarevss priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT yegorovam priskorennâíonívvsilʹnostrumovomurepmodulʹovanomuvčasítaprostorí AT chupikovpt uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve AT medvedevdv uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve AT onishchenkoin uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve AT panasenkobd uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve AT prokopenkoyuv uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve AT pushkarevss uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve AT yegorovam uskorenieionovvsilʹnotočnomrépmodulirovannomvovremeniiprostranstve |