RuPAC2014 - List of Keywords (ion-source)

Paper	Title	Other Keywords	Page
TUPSA17	Axial Injection to a Compact Cyclotron with High Magnetic Field	cyclotron, injection, ion, simulation	75
	V.L. Smirnov, S.B. Vorozhtsov JINR/DLNP, Dubna, Moscow region, Russia
	One of advantages of a compact cyclotron over other type accelerators is a small size mainly defined by the facility’s bending magnetic field. In such cyclotrons an application of an external injection is required in some cases. But for high magnetic field of the cyclotrons (over 4-5 T) there appears a severe problem to make the 1st turns in the machine with external injection of accelerated particles. This paper describes a proposal of a new central region structure of a compact cyclotron that permits one to successfully solve the problem of the axial injection into such a facility using a spiral inflector.

TUPSA28	The Advanced Nanostructure Steel Modification by Gas Ions Beams	ion, experiment, power-supply, operation	97
	S.L. Andrianov, B.B. Chalykh, P.A. Fedin, B. Kondratiev, A.V. Kozlov, R.P. Kuibeda, T. Kulevoy, A.A. Nikitin, S.V. Rogozhkin, A. Sitnikov ITEP, Moscow, Russia
	New constriction materials are under developing for the energy sector. They will provide: energy prodaction, store and transportation with high efficiency and ecology safety. One of the main modern direction of new materials developing are nanostructures steel which consolidation oxide dispersion strengthened (ODS). ODS and EK-181 steels have high hot, radiation and corrosion resistance. The experimental program for investigation of nanoclusters generation and growth (in ODS steels) under irradiation of N (and also Ti, V) ion beams is ongoing in ITEP. Ion irradiation is performed at the accelerator complex TIPr with gas ion source duoplasmatron. In this article the source installation and it's power systems development of, as well as the results of ion beam charge state distribution measurements and the first results of ODS materials irradiation by gas ions are described and discussed.

WEX01	Development of Accelerator Facilities at FSUE SSC RF – IPPE	ion, tandem-accelerator, high-voltage, heavy-ion	120
	V. Romanov, S.V. Bazhal, K.A. Řežvykh IPPE, Obninsk, Russia
	There is a short overview and performed work of FSUE "SSC RF – IPPE" accelerator facilities presented in this paper. This work is reviewed in terms of application in nuclear science and technology. There are some of received results and prospect of accelerator facilities development described.
	Slides WEX01 [0.976 MB]

WECA05	Operation and Development of the BINP AMS Facility	ion, background, detector, controls	134
	S. Rastigeev, A.R. Frolov, A.D. Goncharov, V. Klyuev, E.S. Konstantinov, V.V. Parkhomchuk, A.V. Petrozhitskii BINP SB RAS, Novosibirsk, Russia L.A. Kutnykova Institute of Archaeology and Ethnography, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
	The BINP AMS facility is the accelerator complex for accelerator mass spectrometry. The most distinguishing features of BINP AMS is the use of the middle energy separator of ion beams, the magnesium vapors target as a stripper and time-of-flight telescope for accurate ion selection. Present status and development of AMS complex for extension of applications are reviewed.
	Slides WECA05 [1.129 MB]

WECA09	Dedicated DC-110 Heavy Ion Cyclotron for Industrial Production of Track Membranes	ion, cyclotron, acceleration, heavy-ion	146
	B. Gikal, P.Yu. Apel, S.L. Bogomolov, O.N. Borisov, V.A. Buzmakov, S.N. Dmitriev, A.A. Efremov, A.A. Fateev, G.G. Gulbekyan, I.A. Ivanenko, G.N. Ivanov, I.V. Kalagin, V.I. Kazacha, N.Yu. Kazarinov, M.V. Khabarov, I.V. Kolesov, V.A. Kostyrev, A.M. Lomovcev, V.N. Melnikov, V.I. Mironov, N.F. Osipov, S.V. Pashchenko, O.V. Semchenkova, V.A. Sokolov, A. Tikhomirov, V.A. Verevochkin JINR, Dubna, Moscow Region, Russia
	In the Laboratory of nuclear reactions JINR dedicated accelerator complex on the basis of the heavy ion cyclotron DC110 for the industrial track membrane production has been developed and created. The isochronous cyclotron DC110 accelerates the ions Ar, Kr and Xe with a fixed energy of 2.5 MeV/nucleon and intensity of 10^-15 mkA. The cyclotron is equipped with ECR ion source - DECRIS-5 (18 GHz) and axial injection system. The pole diameter of the magnet is 2 m. Isochronous magnetic field formed by shimming sectors on the level of 1.67 T. Accelerated ions 40Ar⁶⁺, 86Kr¹³⁺, 132Xe²⁰⁺ have close mass-to-charge ratio, which allows changing particles without changing the operation mode of the cyclotron. Accelerator complex DC-10 is capable of producing up to 2 million square meters of track membranes per the year.
	Slides WECA09 [1.603 MB]

WEPSB17	Development of the Injector for Vacuum Insulated Tandem Accelerator	ion, vacuum, neutron, acceleration	191
	A.S. Kuznetsov, A.A. Alexander, M.A. Tiunov BINP SB RAS, Novosibirsk, Russia D.A. Kasatov, A.M. Koshkarev NSU, Novosibirsk, Russia
	The Vacuum Insulated Tandem Accelerator is built at the Budker Institute of Nuclear Physics.* The accelerator is designed for development of the concept of accelerator-based boron neutron capture therapy of malignant tumors in the clinic.** In the accelerator the negative hydrogen ions are accelerated by the high voltage electrode potential to the half of required energy, and after conversion of the ions into protons by means of a gas stripping target the protons are accelerated again by the same potential to the full beam energy. A number of innovative ideas posited in the design make it possible to accelerate intense beams in a compact accelerator. Number of investigations revealed weak points of the accelerator injector: unnecessary beam stripping by the residual gas and complexity to improve the vacuum conditions, the influence of the stripping gas to the ion source operation stability. To ensure the beam parameters and reliability of the facility operation required for clinical applications, the new injector is designed based on the ion source with a current up to 15 mA, providing the possibility of preliminary beam acceleration upto 120-200 keV. The paper presents the design of the injector and the results of calculations performed. Aleynik V., Bashkirtsev A., et al. Applied Radiation and Isotopes 88 (2014) 177-179. *Bayanov B., Belov V., et al. Nuclear Instr. and Methods in Physics Research A 413/2-3 (1998) 397-426.

WEPSB26	Study of Possibility of Industrial Application of Ion Injector I-3	ion, target, simulation, laser	217
	P.N. Alekseev ITEP, Moscow, Russia
	Ions injector I-3 of the ITEP-TWAC accelerator complex consists of a buncher, two-gap accelerating cavity and a beam transport line. Laser ion source is used to generate ions for the injector. Possibility of application of the injector to dope semiconductor materials with variable energy ions is considered. Results of beam parameters optimization by numerical simulation to produce uniform distribution of particles density and required energy spread on the target are presented.

THPSC08	The Project of the HV Axial Injection for the DC-280 Cyclotron at the FLNR JINR	ion, ECR, cyclotron, injection	333
	G.G. Gulbekyan, V. Bekhterev, S.L. Bogomolov, A.A. Efremov, B. Gikal, I.A. Ivanenko, I.V. Kalagin, N.Yu. Kazarinov, M.V. Khabarov, V.N. Melnikov, N.F. Osipov, S.V. Prokhorov, A. Tikhomirov JINR, Dubna, Moscow Region, Russia
	The project of the high-voltage (HV) axial injection for the DC-280 cyclotron which is being created at the FLNR JINR is presented. The injection system will consists of a Permanent Magnet ECR ion source and a Superconducting ECR ion source, beam analyzing magnets, focusing solenoids, beam choppers, a polyharmonic buncher, 75 kV DC accelerating tubes, a commutating electrostatic deflector and a spiral inflector. One part of the injection system is situated on the HV platform, another part is on the grounded yoke of the DC-280 magnet. The injection system will allow one to inject efficiently ions of elements from Helium to Uranium with the atomic mass to charge ratio in the range of 4-7.5 providing acceleration of ion currents with intensity more than 10 pmkA.

THPSC28	Development of Automation System of the Ion Source	controls, PLC, experiment, ion	380
	A.M. Koshkarev, Y.I. Belchenko, A.N. Kvashnin, A.L. Sanin, P.V. Zubarev BINP SB RAS, Novosibirsk, Russia
	To operate a source of negative hydrogen ions an automatic distributed control system was developed. This system consists of master controller (Slab C8051F120) and a set of peripheral local controllers (PLC) based on microcontroller Slab C8051F350. Using an optical link between PLC and master controller there was created a system resistant to high-voltage breakdowns of the ion source. To control the system, a special programming language has been created. It includes procedures for checking the necessary parameters, setting the value of the physical quantities to simplify the experiment, verifying the lock status and protection. This system provides two programmable timers, as well as procedures in emergency situations, such as: lack of water, poor vacuum. It can be operated in semi-automatic mode: the script asks operator about preferable actions and then it continues actions depending on the response. All scripts are performed by master controller, and this makes system very rapid (for example system response time is 1 ms).

THPSC44	Development of Remote Control System for H-minus Ions Source of INR LINAC	ion, controls, linac, H-minus	423
	V.S. Klenov, Yu.V. Kiselev, O. Volodkevich, V. Zubets RAS/INR, Moscow, Russia
	A system of remote control of surface plasma source of negative ions for INR RAS LINAC was designed, constructed and put into operation. The INR LINAC negative ions injector is based on the accelerating tube at energy of 400 keV and surface plasma source of negative ions. Galvanic isolation and spatial separation of elements that are at potential 400 kV in the power rack of the ion source and the host computer are carried out by means of fiber-optic USB-interface extender from firms Icron. A set of multifunctional units from National Instruments allows to monitor the oscilloscope signals with up to 50 Ms/s and to control the ions source power settings. The data acquisition devices programming performed in a LabView graphical environment. Algorithm and LabVew code for fast and safe "conditioning" of the ion source discharge gap and extractor gap from arcing and breakdowns were developed.

THPSC47	Production of Metal Ion Beams from ECR Ion Sources by MIVOC Method	ion, experiment, cyclotron, ECR	432
	K.I. Kuzmenkov, S.L. Bogomolov, A.E. Bondarchenko, A.A. Efremov, N. Lebedev, K.V. Lebedev, V.Ya. Lebedev, V.N. Loginov, Yu. Yazvitsky JINR, Dubna, Moscow Region, Russia Z. Asfari, B.J.P. Gall IPHC, Strasbourg Cedex 2, France
	Funding: Work supported by Russian Foundation for Basic Research under grant number 13-02-12011 The production of metal ion beams with ECR ion sources using MIVOC method is described. The method is based on the use of metal compounds having a high vapor pressure at room temperature: for example, C2B10H12, Fe(C5H5)2 and several others. Intense ion beams of B and Fe were produced at the FLNR JINR cyclotrons using this method. The main efforts were went into production and acceleration of 50Ti ion beam at the U-400 cyclotron. The experiments on production of 50Ti ion beam were performed at the test bench with the natural and enriched compounds of titanium (CH3)5C5Ti(CH3)3. In the experiments at the test bench the beam currents of Ti⁵⁺ - 80 mkA and Ti¹¹⁺ - 70 mkA were achieved at different settings of the source. After successful tests two 3 weeks runs with Ti-50 beam were performed at the U-400 cyclotron for the experiments on spectroscopy of super heavy elements. The intensity of the injected beam of 50Ti⁵⁺ was about of 50-60 mkA, during experiment the source have shown stable operation. The compound consumption rate was determined to be about of 2.4 mg/h, corresponding to 50Ti consumption of 0.52 mg/h.

THPSC55	Improvement of the Beam Transmission in the Central Region Of Warsaw U200P Cyclotron	cyclotron, ion, injection, ECR	453
	O. Steczkiewicz, J. Choinski, P. Gmaj HIL, Warsaw, Poland V. Bekhterev, I.A. Ivanenko JINR, Dubna, Moscow Region, Russia
	To date, Warsaw U200P cyclotron exploited a mirror inflector to feed heavy ions extracted from ECR ion source (10 GHz, 11 kV) to the central region of the cyclotron. However, in such configuration very low transmission was reachable after many optimizations. Additionally, the new ECR ion source (14,5 GHz, 14-24 kV) was installed, which offers energies far exceeding capabilities of the currently operated inflector and central region. To avoid these obstacles, we have developed a spiral inflector and redesigned central region of the cyclotron. It was a very challenging task, bearing in mind limited volume of central region in our compact machine, to carve these elements suitably for decent versatility of ion beams offered by Warsaw cyclotron. This project was executed in the collaboration with FLNR in Dubna, Russia. The cyclotron equipped with the new central region works in the "constant orbit" regime. Here we present the results of both computational simulations and measurements of the beam transmission in upgraded central region.

FRCA02	Time Dependence of Ion Beam Transverse Phase-Space Portrait Orientation During Linac Proton Injector Pulse	ion, high-voltage, proton, focusing	459
	O.T. Frolov, A. Belov, S.E. Golubovskiy, E.S. Nikulin, V. Zubets RAS/INR, Moscow, Russia
	As a result of analysis conducted a transients of the 400 kV column intermediate electrode potential have been determined as one of the main processes responsible for change of beam phase-space portrait orientation during 200 mks, 50 Hz proton injector high voltage accelerating pulse. Beam transport simulation shows high sensitivity of the beam phase-space portrait orientation to variation of the intermediate electrode potential. It has been found that significant variation of this potential takes place due to transition process during a pulse in the capacitor-resistor voltage water divider of the accelerating tube. The divider capacities matching procedure has been performed. The beam emittance measurements results have shown that within the accuracy of observation the beam transverse phase-space portrait orientation remains constant during injector pulse with the accelerating tube voltage divider being compensated.
	Slides FRCA02 [0.824 MB]

Paper

Title

Other Keywords

Page

TUPSA17

Axial Injection to a Compact Cyclotron with High Magnetic Field

cyclotron, injection, ion, simulation

75

V.L. Smirnov, S.B. Vorozhtsov
JINR/DLNP, Dubna, Moscow region, Russia

One of advantages of a compact cyclotron over other type accelerators is a small size mainly defined by the facility’s bending magnetic field. In such cyclotrons an application of an external injection is required in some cases. But for high magnetic field of the cyclotrons (over 4-5 T) there appears a severe problem to make the 1st turns in the machine with external injection of accelerated particles. This paper describes a proposal of a new central region structure of a compact cyclotron that permits one to successfully solve the problem of the axial injection into such a facility using a spiral inflector.

TUPSA28

The Advanced Nanostructure Steel Modification by Gas Ions Beams

ion, experiment, power-supply, operation

97

S.L. Andrianov, B.B. Chalykh, P.A. Fedin, B. Kondratiev, A.V. Kozlov, R.P. Kuibeda, T. Kulevoy, A.A. Nikitin, S.V. Rogozhkin, A. Sitnikov
ITEP, Moscow, Russia

New constriction materials are under developing for the energy sector. They will provide: energy prodaction, store and transportation with high efficiency and ecology safety. One of the main modern direction of new materials developing are nanostructures steel which consolidation oxide dispersion strengthened (ODS). ODS and EK-181 steels have high hot, radiation and corrosion resistance. The experimental program for investigation of nanoclusters generation and growth (in ODS steels) under irradiation of N (and also Ti, V) ion beams is ongoing in ITEP. Ion irradiation is performed at the accelerator complex TIPr with gas ion source duoplasmatron. In this article the source installation and it's power systems development of, as well as the results of ion beam charge state distribution measurements and the first results of ODS materials irradiation by gas ions are described and discussed.

WEX01

Development of Accelerator Facilities at FSUE SSC RF – IPPE

ion, tandem-accelerator, high-voltage, heavy-ion

120

V. Romanov, S.V. Bazhal, K.A. Řežvykh
IPPE, Obninsk, Russia

There is a short overview and performed work of FSUE "SSC RF – IPPE" accelerator facilities presented in this paper. This work is reviewed in terms of application in nuclear science and technology. There are some of received results and prospect of accelerator facilities development described.

Slides WEX01 [0.976 MB]

WECA05

Operation and Development of the BINP AMS Facility

ion, background, detector, controls

134

S. Rastigeev, A.R. Frolov, A.D. Goncharov, V. Klyuev, E.S. Konstantinov, V.V. Parkhomchuk, A.V. Petrozhitskii
BINP SB RAS, Novosibirsk, Russia
L.A. Kutnykova
Institute of Archaeology and Ethnography, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

The BINP AMS facility is the accelerator complex for accelerator mass spectrometry. The most distinguishing features of BINP AMS is the use of the middle energy separator of ion beams, the magnesium vapors target as a stripper and time-of-flight telescope for accurate ion selection. Present status and development of AMS complex for extension of applications are reviewed.

Slides WECA05 [1.129 MB]

WECA09

Dedicated DC-110 Heavy Ion Cyclotron for Industrial Production of Track Membranes

ion, cyclotron, acceleration, heavy-ion

146

B. Gikal, P.Yu. Apel, S.L. Bogomolov, O.N. Borisov, V.A. Buzmakov, S.N. Dmitriev, A.A. Efremov, A.A. Fateev, G.G. Gulbekyan, I.A. Ivanenko, G.N. Ivanov, I.V. Kalagin, V.I. Kazacha, N.Yu. Kazarinov, M.V. Khabarov, I.V. Kolesov, V.A. Kostyrev, A.M. Lomovcev, V.N. Melnikov, V.I. Mironov, N.F. Osipov, S.V. Pashchenko, O.V. Semchenkova, V.A. Sokolov, A. Tikhomirov, V.A. Verevochkin
JINR, Dubna, Moscow Region, Russia

In the Laboratory of nuclear reactions JINR dedicated accelerator complex on the basis of the heavy ion cyclotron DC110 for the industrial track membrane production has been developed and created. The isochronous cyclotron DC110 accelerates the ions Ar, Kr and Xe with a fixed energy of 2.5 MeV/nucleon and intensity of 10^-15 mkA. The cyclotron is equipped with ECR ion source - DECRIS-5 (18 GHz) and axial injection system. The pole diameter of the magnet is 2 m. Isochronous magnetic field formed by shimming sectors on the level of 1.67 T. Accelerated ions 40Ar⁶⁺, 86Kr¹³⁺, 132Xe²⁰⁺ have close mass-to-charge ratio, which allows changing particles without changing the operation mode of the cyclotron. Accelerator complex DC-10 is capable of producing up to 2 million square meters of track membranes per the year.

Slides WECA09 [1.603 MB]

WEPSB17

Development of the Injector for Vacuum Insulated Tandem Accelerator

ion, vacuum, neutron, acceleration

191

A.S. Kuznetsov, A.A. Alexander, M.A. Tiunov
BINP SB RAS, Novosibirsk, Russia
D.A. Kasatov, A.M. Koshkarev
NSU, Novosibirsk, Russia

The Vacuum Insulated Tandem Accelerator is built at the Budker Institute of Nuclear Physics.* The accelerator is designed for development of the concept of accelerator-based boron neutron capture therapy of malignant tumors in the clinic.** In the accelerator the negative hydrogen ions are accelerated by the high voltage electrode potential to the half of required energy, and after conversion of the ions into protons by means of a gas stripping target the protons are accelerated again by the same potential to the full beam energy. A number of innovative ideas posited in the design make it possible to accelerate intense beams in a compact accelerator. Number of investigations revealed weak points of the accelerator injector: unnecessary beam stripping by the residual gas and complexity to improve the vacuum conditions, the influence of the stripping gas to the ion source operation stability. To ensure the beam parameters and reliability of the facility operation required for clinical applications, the new injector is designed based on the ion source with a current up to 15 mA, providing the possibility of preliminary beam acceleration upto 120-200 keV. The paper presents the design of the injector and the results of calculations performed.
*Aleynik V., Bashkirtsev A., et al. Applied Radiation and Isotopes 88 (2014) 177-179.
**Bayanov B., Belov V., et al. Nuclear Instr. and Methods in Physics Research A 413/2-3 (1998) 397-426.

WEPSB26

Study of Possibility of Industrial Application of Ion Injector I-3

ion, target, simulation, laser

217

P.N. Alekseev
ITEP, Moscow, Russia

Ions injector I-3 of the ITEP-TWAC accelerator complex consists of a buncher, two-gap accelerating cavity and a beam transport line. Laser ion source is used to generate ions for the injector. Possibility of application of the injector to dope semiconductor materials with variable energy ions is considered. Results of beam parameters optimization by numerical simulation to produce uniform distribution of particles density and required energy spread on the target are presented.

THPSC08

The Project of the HV Axial Injection for the DC-280 Cyclotron at the FLNR JINR

ion, ECR, cyclotron, injection

333

G.G. Gulbekyan, V. Bekhterev, S.L. Bogomolov, A.A. Efremov, B. Gikal, I.A. Ivanenko, I.V. Kalagin, N.Yu. Kazarinov, M.V. Khabarov, V.N. Melnikov, N.F. Osipov, S.V. Prokhorov, A. Tikhomirov
JINR, Dubna, Moscow Region, Russia

The project of the high-voltage (HV) axial injection for the DC-280 cyclotron which is being created at the FLNR JINR is presented. The injection system will consists of a Permanent Magnet ECR ion source and a Superconducting ECR ion source, beam analyzing magnets, focusing solenoids, beam choppers, a polyharmonic buncher, 75 kV DC accelerating tubes, a commutating electrostatic deflector and a spiral inflector. One part of the injection system is situated on the HV platform, another part is on the grounded yoke of the DC-280 magnet. The injection system will allow one to inject efficiently ions of elements from Helium to Uranium with the atomic mass to charge ratio in the range of 4-7.5 providing acceleration of ion currents with intensity more than 10 pmkA.

THPSC28

Development of Automation System of the Ion Source

controls, PLC, experiment, ion

380

A.M. Koshkarev, Y.I. Belchenko, A.N. Kvashnin, A.L. Sanin, P.V. Zubarev
BINP SB RAS, Novosibirsk, Russia

To operate a source of negative hydrogen ions an automatic distributed control system was developed. This system consists of master controller (Slab C8051F120) and a set of peripheral local controllers (PLC) based on microcontroller Slab C8051F350. Using an optical link between PLC and master controller there was created a system resistant to high-voltage breakdowns of the ion source. To control the system, a special programming language has been created. It includes procedures for checking the necessary parameters, setting the value of the physical quantities to simplify the experiment, verifying the lock status and protection. This system provides two programmable timers, as well as procedures in emergency situations, such as: lack of water, poor vacuum. It can be operated in semi-automatic mode: the script asks operator about preferable actions and then it continues actions depending on the response. All scripts are performed by master controller, and this makes system very rapid (for example system response time is 1 ms).

THPSC44

Development of Remote Control System for H-minus Ions Source of INR LINAC

ion, controls, linac, H-minus

423

V.S. Klenov, Yu.V. Kiselev, O. Volodkevich, V. Zubets
RAS/INR, Moscow, Russia

A system of remote control of surface plasma source of negative ions for INR RAS LINAC was designed, constructed and put into operation. The INR LINAC negative ions injector is based on the accelerating tube at energy of 400 keV and surface plasma source of negative ions. Galvanic isolation and spatial separation of elements that are at potential 400 kV in the power rack of the ion source and the host computer are carried out by means of fiber-optic USB-interface extender from firms Icron. A set of multifunctional units from National Instruments allows to monitor the oscilloscope signals with up to 50 Ms/s and to control the ions source power settings. The data acquisition devices programming performed in a LabView graphical environment. Algorithm and LabVew code for fast and safe "conditioning" of the ion source discharge gap and extractor gap from arcing and breakdowns were developed.

THPSC47

Production of Metal Ion Beams from ECR Ion Sources by MIVOC Method

ion, experiment, cyclotron, ECR

432

K.I. Kuzmenkov, S.L. Bogomolov, A.E. Bondarchenko, A.A. Efremov, N. Lebedev, K.V. Lebedev, V.Ya. Lebedev, V.N. Loginov, Yu. Yazvitsky
JINR, Dubna, Moscow Region, Russia
Z. Asfari, B.J.P. Gall
IPHC, Strasbourg Cedex 2, France

Funding: Work supported by Russian Foundation for Basic Research under grant number 13-02-12011
The production of metal ion beams with ECR ion sources using MIVOC method is described. The method is based on the use of metal compounds having a high vapor pressure at room temperature: for example, C2B10H12, Fe(C5H5)2 and several others. Intense ion beams of B and Fe were produced at the FLNR JINR cyclotrons using this method. The main efforts were went into production and acceleration of 50Ti ion beam at the U-400 cyclotron. The experiments on production of 50Ti ion beam were performed at the test bench with the natural and enriched compounds of titanium (CH3)5C5Ti(CH3)3. In the experiments at the test bench the beam currents of Ti⁵⁺ - 80 mkA and Ti¹¹⁺ - 70 mkA were achieved at different settings of the source. After successful tests two 3 weeks runs with Ti-50 beam were performed at the U-400 cyclotron for the experiments on spectroscopy of super heavy elements. The intensity of the injected beam of 50Ti⁵⁺ was about of 50-60 mkA, during experiment the source have shown stable operation. The compound consumption rate was determined to be about of 2.4 mg/h, corresponding to 50Ti consumption of 0.52 mg/h.

THPSC55

Improvement of the Beam Transmission in the Central Region Of Warsaw U200P Cyclotron

cyclotron, ion, injection, ECR

453

O. Steczkiewicz, J. Choinski, P. Gmaj
HIL, Warsaw, Poland
V. Bekhterev, I.A. Ivanenko
JINR, Dubna, Moscow Region, Russia

To date, Warsaw U200P cyclotron exploited a mirror inflector to feed heavy ions extracted from ECR ion source (10 GHz, 11 kV) to the central region of the cyclotron. However, in such configuration very low transmission was reachable after many optimizations. Additionally, the new ECR ion source (14,5 GHz, 14-24 kV) was installed, which offers energies far exceeding capabilities of the currently operated inflector and central region. To avoid these obstacles, we have developed a spiral inflector and redesigned central region of the cyclotron. It was a very challenging task, bearing in mind limited volume of central region in our compact machine, to carve these elements suitably for decent versatility of ion beams offered by Warsaw cyclotron. This project was executed in the collaboration with FLNR in Dubna, Russia. The cyclotron equipped with the new central region works in the "constant orbit" regime. Here we present the results of both computational simulations and measurements of the beam transmission in upgraded central region.

FRCA02

Time Dependence of Ion Beam Transverse Phase-Space Portrait Orientation During Linac Proton Injector Pulse

ion, high-voltage, proton, focusing

459

O.T. Frolov, A. Belov, S.E. Golubovskiy, E.S. Nikulin, V. Zubets
RAS/INR, Moscow, Russia

As a result of analysis conducted a transients of the 400 kV column intermediate electrode potential have been determined as one of the main processes responsible for change of beam phase-space portrait orientation during 200 mks, 50 Hz proton injector high voltage accelerating pulse. Beam transport simulation shows high sensitivity of the beam phase-space portrait orientation to variation of the intermediate electrode potential. It has been found that significant variation of this potential takes place due to transition process during a pulse in the capacitor-resistor voltage water divider of the accelerating tube. The divider capacities matching procedure has been performed. The beam emittance measurements results have shown that within the accuracy of observation the beam transverse phase-space portrait orientation remains constant during injector pulse with the accelerating tube voltage divider being compensated.

Slides FRCA02 [0.824 MB]