Study of electron beam energy conversion at gyrocon–linear accelerator facility
A gyrocon together with the high-voltage 1.5 MeV accelerator ELIT-3A represents a power generator at 430 MHz serving for linear electron accelerator pulse driving. The facility description and results of calorimetric measurements of ELIT-3A electron beam power and accelerated beam at the end of ac...
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2004
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| Цитувати: | Study of electron beam energy conversion at gyrocon–linear accelerator facility / M.M. Karliner, E.V. Kozyrev, I.G. Makarov, O.A. Nezhevenko, G.N. Ostreiko, B.Z. Persov, G.V. Serdobintsev // Вопросы атомной науки и техники. — 2004. — № 1. — С. 94-96. — Бібліогр.: 3 назв. — англ. |
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irk-123456789-787032016-04-14T15:11:54Z Study of electron beam energy conversion at gyrocon–linear accelerator facility Karliner, M.M. Kozyrev, E.V. Makarov, I.G. Nezhevenko, O.A. Ostreiko, G.N. Persov, B.Z. Serdobintsev, G.V. Элементы ускорителей A gyrocon together with the high-voltage 1.5 MeV accelerator ELIT-3A represents a power generator at 430 MHz serving for linear electron accelerator pulse driving. The facility description and results of calorimetric measurements of ELIT-3A electron beam power and accelerated beam at the end of accelerator are presented in the paper. The achieved energy conversion efficiency is about 55%. Гирокон разом з високовольтним 1.5 МеВ прискорювачем ЕЛІТ-3А являє собою генератор потужності на частоті 430 МГц і служить для збудження лінійного прискорювача електронів в імпульсному режимі. Приведено опис установки і результати калориметричних вимірів потужності електронного пучка ЕЛІТ-3А і прискореного пучку на виході лінійного прискорювача. Отриманий КПД перетворення 55%. Гирокон совместно с высоковольтным 1.5 МэВ ускорителем ЭЛИТ-3А представляет собой генератор мощности на частоте 430 МГц и служит для возбуждения линейного ускорителя электронов в импульсном режиме. Приведено описание установки и результаты калориметрических измерений мощности электронного пучка ЭЛИТ-3А и ускоренного пучка на выходе линейного ускорителя. Получен КПД преобразования 55%. 2004 Article Study of electron beam energy conversion at gyrocon–linear accelerator facility / M.M. Karliner, E.V. Kozyrev, I.G. Makarov, O.A. Nezhevenko, G.N. Ostreiko, B.Z. Persov, G.V. Serdobintsev // Вопросы атомной науки и техники. — 2004. — № 1. — С. 94-96. — Бібліогр.: 3 назв. — англ. 1562-6016 PACS: 29.27.Eg http://dspace.nbuv.gov.ua/handle/123456789/78703 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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DSpace DC |
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English |
| topic |
Элементы ускорителей Элементы ускорителей |
| spellingShingle |
Элементы ускорителей Элементы ускорителей Karliner, M.M. Kozyrev, E.V. Makarov, I.G. Nezhevenko, O.A. Ostreiko, G.N. Persov, B.Z. Serdobintsev, G.V. Study of electron beam energy conversion at gyrocon–linear accelerator facility Вопросы атомной науки и техники |
| description |
A gyrocon together with the high-voltage 1.5 MeV accelerator ELIT-3A represents a power generator at 430 MHz
serving for linear electron accelerator pulse driving. The facility description and results of calorimetric measurements of
ELIT-3A electron beam power and accelerated beam at the end of accelerator are presented in the paper. The achieved
energy conversion efficiency is about 55%. |
| format |
Article |
| author |
Karliner, M.M. Kozyrev, E.V. Makarov, I.G. Nezhevenko, O.A. Ostreiko, G.N. Persov, B.Z. Serdobintsev, G.V. |
| author_facet |
Karliner, M.M. Kozyrev, E.V. Makarov, I.G. Nezhevenko, O.A. Ostreiko, G.N. Persov, B.Z. Serdobintsev, G.V. |
| author_sort |
Karliner, M.M. |
| title |
Study of electron beam energy conversion at gyrocon–linear accelerator facility |
| title_short |
Study of electron beam energy conversion at gyrocon–linear accelerator facility |
| title_full |
Study of electron beam energy conversion at gyrocon–linear accelerator facility |
| title_fullStr |
Study of electron beam energy conversion at gyrocon–linear accelerator facility |
| title_full_unstemmed |
Study of electron beam energy conversion at gyrocon–linear accelerator facility |
| title_sort |
study of electron beam energy conversion at gyrocon–linear accelerator facility |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| publishDate |
2004 |
| topic_facet |
Элементы ускорителей |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/78703 |
| citation_txt |
Study of electron beam energy conversion at gyrocon–linear accelerator facility / M.M. Karliner, E.V. Kozyrev, I.G. Makarov, O.A. Nezhevenko, G.N. Ostreiko, B.Z. Persov,
G.V. Serdobintsev // Вопросы атомной науки и техники. — 2004. — № 1. — С. 94-96. — Бібліогр.: 3 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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2025-07-06T02:46:23Z |
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| fulltext |
STUDY OF ELECTRON BEAM ENERGY CONVERSION
AT GYROCON–LINEAR ACCELERATOR FACILITY
M.M. Karliner, E.V. Kozyrev, I.G. Makarov, O.A. Nezhevenko, G.N. Ostreiko, B.Z. Persov,
G.V. Serdobintsev
Budker INP, Novosibirsk, Russia
A gyrocon together with the high-voltage 1.5 MeV accelerator ELIT-3A represents a power generator at 430 MHz
serving for linear electron accelerator pulse driving. The facility description and results of calorimetric measurements of
ELIT-3A electron beam power and accelerated beam at the end of accelerator are presented in the paper. The achieved
energy conversion efficiency is about 55%.
PACS: 29.27.Eg
1. INTRODUCTION
The high-current (up to 20 A) 50 MeV linear accel-
erator (linac) operated in energy accumulating mode [1]
is used as an electron and positron source at the VEPP-4
storage facility at the Budker INP SB RAS. Making
such accelerator has been made possible by develop-
ment at BINP of a high-power RF power source – gyro-
con [2]. The gyrocon uses a non-bunched relativistic
electron beam form the high-voltage direct action accel-
erator ELIT-3A [3]. The linear accelerator has been op-
erating as a part of the VEPP-4 facility since 1978.
Availability of the high-efficiency (>75%) RF power
source and safely operated linac enabled us to carry out
experiments on study of relatively low-voltage (1.5…
1.7 MeV) high-power electron beam energy conversion
into the energy of electrons accelerated up to energy of
15…20 MeV. Such investigations are still actual be-
cause of availability of effective accelerator projects for
applied applications and future linear collider projects,
operated at the same concept.
2. EXPERIMENTAL SETUP
Fig. 1 represents the schematic diagram of the exper-
imental setup and its main parts.
Fig.1. Experimental setup schematics
1.5 MeV electron beam formed by ELIT-3A acceler-
ator (1) is injected via electron-optic channel (2) into
gyrocon (3). Conversion of the electron kinetic energy
into RF power at 430 MHz takes place in the gyrocon
output cavity (4). Two vacuum-proof waveguides (5)
serve for RF power output from the gyrocon. Length of
these waveguides is divisible by integer number of the
half-wavelength and provides the resonant coupling be-
tween the RF power source –gyrocon and linac.
The linear accelerator consists of two sections (6,7),
each of them is a biperiodic chain of coupled cavities. π
/2 type oscillations are excited in the structure with
TM010 field distribution in the cavities. Each section con-
tains 10 accelerating and 9 coupling cavities. The cou-
pling coefficient of the accelerating cavities is about
10% and provides short transition time of linac oscilla-
tions comparing with RF feeding pulse length.
A diode gun serves as an electron injector (8) in
linac. The gun is installed into the center of the end wall
of the first accelerating section (6). The gun anode is re-
alized as a grid with transparency coefficient of 0.8 and
has a galvanic coupling with the end wall. The negative
voltage pulse of 40…60 kV with duration up to 10 µs is
formed by the gun modulator and is applied to the cath-
ode through the step-up transformer, thus providing in-
jection of the electron current into linac. In the first cav-
ity, bunches of ~2 radians length are formed from the
electron flow, then they are accelerated in linac sections,
are focused, and hit the cooled target (9) connected to
the calorimeter (10).
A general view of the experimental setup is shown
in Fig.2. Fig. 3 represents a time diagram, which clari-
fies the device operating. Efficiency of low-energy
ELIT-3A beam power conversion into high-energy linac
electron beam power is determined by the ratio of the
average during a pulse beam power at linac output Pu to
the beam power exciting the gyrocon Pg, i.e. η= Pu/ Pg.
To measure these values, the method of calorimetrical
calibration has been chosen. Such a method is preferred
because of the electrons are injected into the linac
without pre-bunching. Pulse forms were controlled by
automated system, which simultaneously carried out the
functional dependence processing. The target (Fig.1
pos.9) which absorbs the beam from linac is made of
aluminium and lead. Its dimensions has been chosen to
absorb more than 98% of the beam power for 40 MeV
electron beam. The target is heat-insulated and is cooled
by water pumped through the calorimeter. The calori-
meter contains the heating element, which is used for
calibration by heating the water up to the fixed temper-
ature difference by alternate current of low frequency. It
allowed us to eliminate inaccuracies of water current
speed measurements and thermal couple calibration, as
well as to decrease error of power measurement down to
±2…3%.
___________________________________________________________
PROBLEMS OF ATOMIC SIENCE AND TECHNOLOGY. 2004. № 1.
Series: Nuclear Physics Investigations (42), p.94-96.94
The distantly replaceable gyrocon central probe
(Fig.1 pos.11) is used as an absorbing target to measure
an average beam power excited the gyrocon. This probe
is made as a cooled Faraday cup, which can be connec-
ted to the calorimeter. The probe is located between the
gyrocon input cavity (Fig.1 pos.12) and deflecting sys-
tems (Fig.1 pos.13). To measure the beam average
power, which excites the gyrocon, the central probe is
Fig.2. Experimental setup: a general view
Fig.3. Pulses time dependencies
positioned on the axis, and the drive cavity is not excited.
In this case, the direct beam from ELIT-3A is absorbed in
the Faraday cup, so heating it, and the calorimeter allows
us to measure an average consumed power.
3. STUDY RESULTS
The maximal beam power at the linac output has
been obtained by thorough gyrocon tuning, adjusting the
coupling between the output cavity and linac sections,
and choosing the parameters of the beam injected into
the linac (such as voltage, current, duration, and mo-
ment of injection). The main parameters of ELIT-3A
and linac are correspondingly listed in Tables 1 and 2.
Table 1
ELIT-3A accelerating voltage, MV 1.75
ELIT-3A pulsed current, exciting the gyro-
con, A 42
Beam energy, J 848
ELIT-3A current pulse duration at 0.5 pow-
er level, µs 11.4
ELIT-3A average per pulse beam power,
exciting the gyrocon, MW 74.4
Table 2
Operating frequency, MHz 429.5
Type of oscillations in the structure π/2
Coupling coefficient of accelerating cavi-
ties, % 10.6
___________________________________________________________
PROBLEMS OF ATOMIC SIENCE AND TECHNOLOGY. 2004. № 1.
Series: Nuclear Physics Investigations (42), p.94-96.95
Accelerating section quality factor Q 20000
Shunt impedance R, MOhm/m 12.5
Accelerator output electron energy, MeV ~19
Beam pulsed current, A 2.2
Beam energy, J 335
Beam current duration at 0.5 power level, µs 8.1
Average per pulse beam power, MW 41.4
4. CONCLUSION
As a result of work carried out, the experimental ef-
ficiency η=0.55±0.03 of electron beam energy conver-
sion at the gyrocon–linear accelerator setup has been
obtained. The experiments were realized at a facility not
optimized for the maximal efficiency obtaining: linac
and gyrocon cavities were made of duralumin, coupling
cavities in linac sections are located along the beam mo-
tion direction, etc. Nevertheless, the experiments have
demonstrated a possibility to create such devices with
high conversion efficiency of low-energy electron
beams into high-energy beams.
REFERENCES
1. G.I. Budker et al. Positron source for VEPP-4 stor-
age facility // Proc. of V All-Union Conf. on
Charged particle Acc. M.: “Nauka”, 1978, v.1,
p.280–283.
2. G.I. Budker et al. Gyrocon – a high efficiency con-
verter of the high-power relativistic beam energy
for RF powering of charged particle accelerators//
Atomnaya energiya. 1978, v.44, issue 5, p.397–403.
3. S.B. Vasserman et al. High-voltage pulsed electron
beam source ELIT-3A: Preprint INP 79-111, 1979.
ИССЛЕДОВАНИЕ ПРЕОБРАЗОВАНИЯ ЭНЕРГИИ ЭЛЕКТРОННОГО ПУЧКА НА УСТАНОВКЕ
ГИРОКОН – ЛИНЕЙНЫЙ УСКОРИТЕЛЬ
М.М. Карлинер, Е.В. Козырев, И.Г. Макаров, О.А. Нежевенко, Г.Н. Острейко, Б.З. Персов, Г.В. Сердо-
бинцев
Гирокон совместно с высоковольтным 1.5 МэВ ускорителем ЭЛИТ-3А представляет собой генератор
мощности на частоте 430 МГц и служит для возбуждения линейного ускорителя электронов в импульсном
режиме. Приведено описание установки и результаты калориметрических измерений мощности электронно-
го пучка ЭЛИТ-3А и ускоренного пучка на выходе линейного ускорителя. Получен КПД преобразования
55%.
ДОСЛІДЖЕННЯ ПЕРЕТВОРЕННЯ ЕНЕРГІЇ ЕЛЕКТРОННОГО ПУЧКА НА УСТАНОВЦІ
ГИРОКОН – ЛІНІЙНИЙ ПРИСКОРЮВАЧ
М.М. Карлинер, Є.В. Козирєв, І.Г. Макаров, О.А. Нежевенко, Г.Н. Острейко, Б.З. Персів,
Г.В. Сердобинцев
Гирокон разом з високовольтним 1.5 МеВ прискорювачем ЕЛІТ-3А являє собою генератор потужності
на частоті 430 МГц і служить для збудження лінійного прискорювача електронів в імпульсному режимі.
Приведено опис установки і результати калориметричних вимірів потужності електронного пучка ЕЛІТ-3А і
прискореного пучку на виході лінійного прискорювача. Отриманий КПД перетворення 55%.
96
Budker INP, Novosibirsk, Russia
REFERENCES
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