Project of RF station for “FAIR” accelerator facility, GSI, Germany
The project of RF station which is supposed to be used on accelerators of ions SIS100/300, and after a small
 modification in the storing ring NESR is presented. The maximal RF voltage on the cavity accelerating gap is 20 кV
 in the CW mode. The operational RF frequency range for all...
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| Veröffentlicht in: | Вопросы атомной науки и техники |
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| Datum: | 2008 |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2008
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| Zitieren: | Project of RF station for “FAIR” accelerator facility, GSI, germany / V.S. Arbuzov, Y.A. Biruchevsky, E.I. Gorniker, Y.G. Kruchkov, S.A. Krutikhin, G.Y. Kurkin, V.N. Osipov, V.M. Petrov, A.M. Pilan // Вопросы атомной науки и техники. — 2008. — № 3. — С. 113-115. — Бібліогр.: 2 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860256326788055040 |
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| author | Arbuzov, V.S. Biruchevsky, Y.A. Gorniker, E.I. Kruchkov, Y.G. Krutikhin, S.A. Kurkin, G.Y. Osipov, V.N. Petrov, V.M. Pilan, A.M. |
| author_facet | Arbuzov, V.S. Biruchevsky, Y.A. Gorniker, E.I. Kruchkov, Y.G. Krutikhin, S.A. Kurkin, G.Y. Osipov, V.N. Petrov, V.M. Pilan, A.M. |
| citation_txt | Project of RF station for “FAIR” accelerator facility, GSI, germany / V.S. Arbuzov, Y.A. Biruchevsky, E.I. Gorniker, Y.G. Kruchkov, S.A. Krutikhin, G.Y. Kurkin, V.N. Osipov, V.M. Petrov, A.M. Pilan // Вопросы атомной науки и техники. — 2008. — № 3. — С. 113-115. — Бібліогр.: 2 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | The project of RF station which is supposed to be used on accelerators of ions SIS100/300, and after a small
modification in the storing ring NESR is presented. The maximal RF voltage on the cavity accelerating gap is 20 кV
in the CW mode. The operational RF frequency range for all three accelerators is 0.9…2.8 MHz. The descriptions of
the RF station design and of the control system are given.
Представлено проект ВЧ-станції, що передбачається використати в прискорювачах іонів SIS100/300, а
також після невеликої модифікації в накопичувачі NESR. Максимальна напруга на прискорювальному зазорі резонатору 20 кВ у безперервному режимі. Діапазон робочих частот ВЧ-станції для всіх трьох прискорювачів 0.9...2.8 МГц. Приводяться опис конструкції ВЧ-станції і побудова системи керування.
Представлен проект ВЧ-станции, которую предполагается использовать в ускорителях ионов SIS100/300,
а также после небольшой модификации в накопителе NESR. Максимальное напряжение на ускоряющем зазоре резонатора 20 кВ в непрерывном режиме. Диапазон рабочих частот ВЧ-станции для всех трех ускорителей 0.9…2.8 МГц. Приводятся описание конструкции ВЧ-станции и построение системы управления.
|
| first_indexed | 2025-12-07T18:49:30Z |
| format | Article |
| fulltext |
PROJECT OF RF STATION FOR “FAIR” ACCELERATOR FACILITY,
GSI, GERMANY
V.S. Arbuzov, Yu.A. Biruchevsky, E.I.Gorniker, Ya.G. Kruchkov, S.A. Krutikhin,
G.Ya. Kurkin, V.N. Osipov, V.M. Petrov, A.M. Pilan
The Budker Institute of Nuclear Physics, 11 Lavrentyev Prospect, Novosibirsk 630090, Russia
The project of RF station which is supposed to be used on accelerators of ions SIS100/300, and after a small
modification in the storing ring NESR is presented. The maximal RF voltage on the cavity accelerating gap is 20 кV
in the CW mode. The operational RF frequency range for all three accelerators is 0.9…2.8 MHz. The descriptions of
the RF station design and of the control system are given.
PACS: 29.20.-c
INTRODUCTION
The Budker Institute of Nuclear Physics, Novosibirsk
participates in realization of the project of accelerating
complex “FAIR”, GSI, Darmstadt, Germany. In the
scope of the project, a large number of RF systems will
be built at the GSI.
The Institute of Nuclear Physics in cooperation with
experts of GSI has developed a project of RF systems
for accelerating rings SIS100, SIS300 and NESR. Key
parameters of RF of systems are given in Table.
Main parameters of RF systems
Parameter SIS100/300 NESR
Operating frequency
range: 1.1…2.8 MHz 0.9…2.7 MHz
Nominal gap voltage: 20 кV 15 кV
Output power of RF
generator:
65 kW 45 kW
Maximum vacuum
leakage rate: <1·10-10 mbar l/s <1·10-10 mbar l/s
Length of the cavities
(flange to flange): 2800 mm 2800 mm
Circular beam tube
aperture: 150 mm 200mm
Number of channels
in RF system: 20 / 8 1
One channel of the RF system consists of an acceler-
ating cavity, RF power amplifier and control electron-
ics. The accelerating cavity and the output stage of RF
amplifier are assembled as one module. Transistor RF
preamplifier, power supplies of the RF generator and
the control electronics are placed separately, in the radi-
ation-safe zone. Power supplies of screen and control
grid of the tetrode, RF preamplifier, cavity ferrites bias-
ing power supply, control electronics and interlocks will
be placed in one rack. The anode power supply of RF
generator with the circuit of the fast protection against
sparking in the tube will be made and installed by the
firm BRUKER, France.
ACCELERATING CAVITY
Cavity design ideas and technology which were real-
ized and tested in the projects of RF stations for the In-
stitute of Modern Physics, Lanzhou, China [1], [2] were
used in the design of RF cavity for GSI. The accelerating
RF cavity consists of two shorted quarter wave pieces of
a coaxial line. In the gap between open central conductors
of the line a ceramic insulator is welded up, the internal
space of the coaxial line is filled by ferrite of 400NN-2
type. Ferrite will be made by factory MAGNETON, St.-
Petersburg first in the form of plates, which after machin-
ing will be glued up into rings (see Fig.1).
Thickness of a ring is 25 mm; total number of rings
in the cavity is 56.
590
340
Fig.1. Outline of the ferrite ring
The ferrite stack of every half-cavity is divided in
two equal groups. The ferrite biasing winding is wound
up in these groups so, that the voltages induced in loops
of both group are compensated (see Fig.2). Number of
coils in a winding is 48, windings both половинок the
resonator are connected in series. The biasing current in
the winding varies in the range of up to 30 A for tuning
the cavity resonant frequency in the whole range. The to-
tal resistance of the winding is less than 0.5 Ohm.
RF cavity ferrites are cooled by water. Copper plates
with internal water channels are inserted between ferrite
rings.
For better thermal contact between ferrite rings and
copper plates, for mechanical rigidity of the design as
well as for higher insulation strength the free space in-
side the cavity is filled with a silicon sealant. The maxi-
mal power dissipation in ferrite is 0.2 Вт/см3.
RF GENERATOR
The output stage of RF generator has one tetrode
RS1054SK, made by the firm Siemens/Thales. The an-
ode of the tube is connected with the half-cavity through
a decoupling capacity. For reduction of the inphase
component of RF cavity gap voltage with the unbalance
tube loading a pair of ∞-shape turns couples two quar-
ters of the cavity ferrite stack. (see Fig.2).
____________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2008. № 3.
Series: Nuclear Physics Investigations (49), p.113-115. 113
Ceramic
insulator
Ferrites
Anode DC
voltageFerrite biasing
current
~
Coupling
turn
Fig.2. Sketch of RF cavity
Accelerating ring SIS100 will share the same tunnel
with the SIS300, the SIS300 will be built on top of the
SIS100, with a slight transversal displacement. The am-
plifier of SIS100 will be installed under cavity. The
small distance between planes of their orbits compels to
mount the SIS300 amplifier on top of the cavity SIS300.
Therefore a design foresees the opportunity of connec-
tion cavity with RF amplifier in both cases without
change of orientation in space of both constructions.
The high level of the induced radio-activity in the
accelerating hall also imposes restrictions on arrange-
ment of equipment and design of RF station. The equip-
ment of an accelerating hall does not contain semi-con-
ductor elements; RF generator box contains only tetrode
and the transformer of the filament heater. For fast re-
placement of the tube it is located in a sliding module.
Quick plug connections of the sliding module with the
amplifier are used (electric connections, connections of
the cooling water, air).
Accelerators operate with large current of charged
particles. For reduction of interaction of RF system with
ion bunches the negative feedback is introduced in the
output stage. The voltage from the anode capacitor di-
vider is applied to cathode of a tube through the invert-
ing transformer. As a result, the output impedance of RF
system seen from the beam does not exceed 3000 Ohm
at the operating frequency.
A transistor preamplifier with the maximal output
power of 1.5 kW in CW mode drives the tetrode stage
of RF amplifier.
CONTROL SYSTEM
Control electronics together with power supplies for
the tube’s grids and the source of the ferrites biasing
current are located in one rack. Control electronics have
two feedback circuits. One of them stabilizes accelerat-
ing voltage at the RF cavity accelerating gap, the second
tunes RF cavity to resonance by adjusting the ferrite bi-
asing current.
Interlocks protect powerful elements of RF system
and personal in case of emergency situations. A module
which controls the tetrode power supplies together with
interlock of RF power amplifier are made in one module
using PLM “ALTERA” which guarantees online control
of all input signals and increases reliability of the whole
system. The remote monitoring and control of RF sta-
tion is realized with the selection of the Siemens
S7 modules.
MESUREMENT OF FERRITE PARAME-
TERS
Parameters of the 400NN-2 ferrite have been mea-
sured in regimes which correspond to regimes of the RF
stations. Magnetic permeability and Q-value factor were
measured in a frequency range of 0.9…3 MHz at vari-
ous levels of RF and DC biasing.
~
Oscilloscope
TDS 3032
Tektronix
50
Ohm
DC power
supply
TEC 5010
V
R
2.8nF
N1=4 N2=16
1 2
Fig.3. Setup for measuring the ferrite ring parameters
A setup was made for the ferrite measurement (see
Fig.3). Two rings of 400NN-2 material with outside dimen-
sions of D x d x h = 32 x 20 x 6 mm were tested. 16 turns of
∞ – shape were wound up around rings for biasing and
4 turns of 0 – shape made inductance for the resonance LC
circuit. One turn of 0 – shape was used to measure RF mag-
netic flux in ferrite, RF voltage at 50 Ohm indicated losses
in ferrite and was use to calculate the equivalent shunt
impedance of the circuit. Knowing capacitance of the LC
circuit (2.8 nF), the Q – value of ferrite was calculated.
1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0
0
1
2
3
4
5
6
7
8
9
10
11
12
4
32
1
4
32
1
Frequency ,MHz
4
32
1
4
32
μQ
F*
10
3
Fig.4. Dependence of µQF product of ferrite ring ver-
sus frequency
The resonant LC circuit was excited from a signal gen-
erator Aligent 33250A through a broadband amplifier with
the maximal output power of 15 W. Fig.4 presents the µ
QF product of ferrite versus frequency. Each curve of the
plot is made on condition that product of the measurement
114
frequency and of RF magnetic flux density is constant, i.e.
F · B = const. Thus the curves 1, 2, 3, and 4 corresponds
to RF voltages of 10 kV, 14.9 kV, 17.1 kV and 20 kV ac-
cordingly at the real cavity accelerating gap.
REFERENCES
1. V.S. Arbuzov et al. Accelerating RF Station for
HIRFL-CSR. Lanzhou, China; (RUPAC 2004).
2. V.S. Arbuzov et al. RF Station for Ion Beam Stack-
ing in HIREL-CSR. (RUPAC 2004).
ПРОЕКТ ВЧ-СТАНЦИИ ДЛЯ УСКОРИТЕЛЬНОГО КОМПЛЕКСА “FAIR”, GSI, ГЕРМАНИЯ
В.С. Арбузов, Ю.А. Бирючевский, Э.И. Горникер, Я.Г. Крючков, С.А. Крутихин, Г.Я. Куркин,
В.Н. Осипов, В.М. Петров, А.М. Пилан
Представлен проект ВЧ-станции, которую предполагается использовать в ускорителях ионов SIS100/300,
а также после небольшой модификации в накопителе NESR. Максимальное напряжение на ускоряющем за-
зоре резонатора 20 кВ в непрерывном режиме. Диапазон рабочих частот ВЧ-станции для всех трех ускори-
телей 0.9…2.8 МГц. Приводятся описание конструкции ВЧ-станции и построение системы управления.
ПРОЕКТ ВЧ-СТАНЦІЇ ДЛЯ ПРИСКОРЮЮЧОГО КОМПЛЕКСУ “FAIR”, GSI, НІМЕЧЧИНА
В.С. Арбузов, Ю.А. Бірючевський, Е.І. Горникер, Я.Г. Крючков, С.А. Крутихін, Г.Я. Куркін, В.Н. Осипов,
В.М. Петров, А.М. Пілан
Представлено проект ВЧ-станції, що передбачається використати в прискорювачах іонів SIS100/300, а
також після невеликої модифікації в накопичувачі NESR. Максимальна напруга на прискорювальному
зазорі резонатору 20 кВ у безперервному режимі. Діапазон робочих частот ВЧ-станції для всіх трьох
прискорювачів 0.9...2.8 МГц. Приводяться опис конструкції ВЧ-станції і побудова системи керування.
____________________________________________________________
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2008. № 3.
Series: Nuclear Physics Investigations (49), p.113-115. 115
INTRODUCTION
ACCELERATING CAVITY
RF GENERATOR
CONTROL SYSTEM
MESUREMENT OF FERRITE PARAMETERS
|
| id | nasplib_isofts_kiev_ua-123456789-111400 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T18:49:30Z |
| publishDate | 2008 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Arbuzov, V.S. Biruchevsky, Y.A. Gorniker, E.I. Kruchkov, Y.G. Krutikhin, S.A. Kurkin, G.Y. Osipov, V.N. Petrov, V.M. Pilan, A.M. 2017-01-09T18:48:33Z 2017-01-09T18:48:33Z 2008 Project of RF station for “FAIR” accelerator facility, GSI, germany / V.S. Arbuzov, Y.A. Biruchevsky, E.I. Gorniker, Y.G. Kruchkov, S.A. Krutikhin, G.Y. Kurkin, V.N. Osipov, V.M. Petrov, A.M. Pilan // Вопросы атомной науки и техники. — 2008. — № 3. — С. 113-115. — Бібліогр.: 2 назв. — англ. 1562-6016 https://nasplib.isofts.kiev.ua/handle/123456789/111400 PACS: 29.20.-c The project of RF station which is supposed to be used on accelerators of ions SIS100/300, and after a small
 modification in the storing ring NESR is presented. The maximal RF voltage on the cavity accelerating gap is 20 кV
 in the CW mode. The operational RF frequency range for all three accelerators is 0.9…2.8 MHz. The descriptions of
 the RF station design and of the control system are given. Представлено проект ВЧ-станції, що передбачається використати в прискорювачах іонів SIS100/300, а
 також після невеликої модифікації в накопичувачі NESR. Максимальна напруга на прискорювальному зазорі резонатору 20 кВ у безперервному режимі. Діапазон робочих частот ВЧ-станції для всіх трьох прискорювачів 0.9...2.8 МГц. Приводяться опис конструкції ВЧ-станції і побудова системи керування. Представлен проект ВЧ-станции, которую предполагается использовать в ускорителях ионов SIS100/300,
 а также после небольшой модификации в накопителе NESR. Максимальное напряжение на ускоряющем зазоре резонатора 20 кВ в непрерывном режиме. Диапазон рабочих частот ВЧ-станции для всех трех ускорителей 0.9…2.8 МГц. Приводятся описание конструкции ВЧ-станции и построение системы управления. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Физика и техника ускорителей Project of RF station for “FAIR” accelerator facility, GSI, Germany Проект ВЧ-станції для прискорюючого комплексу “FAIR”, GSI, Hімеччина Проект ВЧ-станции для ускорительного комплекса “FAIR”, GSI, Германия Article published earlier |
| spellingShingle | Project of RF station for “FAIR” accelerator facility, GSI, Germany Arbuzov, V.S. Biruchevsky, Y.A. Gorniker, E.I. Kruchkov, Y.G. Krutikhin, S.A. Kurkin, G.Y. Osipov, V.N. Petrov, V.M. Pilan, A.M. Физика и техника ускорителей |
| title | Project of RF station for “FAIR” accelerator facility, GSI, Germany |
| title_alt | Проект ВЧ-станції для прискорюючого комплексу “FAIR”, GSI, Hімеччина Проект ВЧ-станции для ускорительного комплекса “FAIR”, GSI, Германия |
| title_full | Project of RF station for “FAIR” accelerator facility, GSI, Germany |
| title_fullStr | Project of RF station for “FAIR” accelerator facility, GSI, Germany |
| title_full_unstemmed | Project of RF station for “FAIR” accelerator facility, GSI, Germany |
| title_short | Project of RF station for “FAIR” accelerator facility, GSI, Germany |
| title_sort | project of rf station for “fair” accelerator facility, gsi, germany |
| topic | Физика и техника ускорителей |
| topic_facet | Физика и техника ускорителей |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/111400 |
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