RUPAC2012 - List of Keywords (DTL)

Paper	Title	Other Keywords	Page
WEYCH02	Multipurpose Research Complex Based on the INR High Intensity Proton Linac	linac, cavity, proton, neutron	90
	L.V. Kravchuk, A. Feschenko, M.I. Grachev, V.L. Serov RAS/INR, Moscow, Russia
	Funding: Russian Academy of Science Scientific Complex based on the 600 MeV Proton Linac is under operation at the INR, Troitsk, Moscow to provide both basic and applied research. At the moment proton beam from the Linac with energy about 210 MeV and average current about 130 μA is transporting to the Experimental Area to be use for following facilities: three Spallation Neutron sources, the Isotope Production facility and the Beam Therapy complex. Status of the Linac and Experimental Area as well as the tuning procedures to decrease particle loss in high-intensity mode of operation are given in the paper.
	Slides WEYCH02 [2.281 MB]

FRBCH02	Project of Low-Energy Accelerator Driven Power Plant	target, neutron, proton, linac	224
	A.G. Golovkina, D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia A.A. Bogdanov, I.V. Kudinovich, V.P. Struev AN Krylov SRI, St. Petersburg, Russia Y.A. Svistunov NIIEFA, St. Petersburg, Russia
	Project of low-energy accelerator driven nuclear power plant is considered. The accelerator driven system (ADS) with subcritical fast reactor, proton linac and fissile target is proposed. The main performance data of the ADS: proton beam energy 300-400 MeV, accelerator average current 5 mA, reactor thermal power 200 MW, core effective multiplication factor Keff=0.98. The principal design features of the power plant are also represented.
	Slides FRBCH02 [2.663 MB]

MOPPA022	Status of INR DTL RF System	cavity, linac, vacuum, cathode	293
	A.I. Kvasha, A. Feschenko, V.L. Serov RAS/INR, Moscow, Russia
	INR Linac is in regular operation since 1993. The accelerator incorporates DTL and DAW structures operating at 198.2 MHz and 991 MHz correspondingly. Initially two types of high power vacuum tubes specially designed for INR linac (GI-54A for final amplifier and GI-51A for intermediate amplifier) were used in DTL RF power system. However production of these tubes has been terminated resulting in a need of DTL RF system upgrade. The main goal of the recent upgrade is replacement of the old tubes by modern ones. The difficulty of replacement arises due to a need to minimize mechanical changes of the existing equipment. Another goal is improving of operational reliability. The reliability depends on vacuum tube reliability and to a large extent - on crowbar operation. The results and the experience of INR DTL RF system upgrade are presented

MOPPA023	Investigation of INR DTL RF System Operation at 100 Hz Repetition Rate	cathode, cavity, linac, controls	296
	V.L. Serov, A.N. Drugakov, A. Feschenko, A.I. Kvasha, A.N. Naboka RAS/INR, Moscow, Russia
	INR Linac has been operating with 50 Hz beam repetition rate so far. Increasing the repetition rate up to 100 Hz is of importance as it results in doubling of the beam intensity. To solve the task several accelerator systems must be modernized but the most critical one is the DTL rf system (up to 100 MeV). The problems related to the DTL rf system repetition rate increasing are described. One of them is a 50 Hz modulation of a 100 Hz rf pulse sequence. Though the instabilities of accelerating field due to the modulation are reduced by the feedback systems, nevertheless exploration of the effect and its minimizing is of importance. The analysis of the effect is given and the results of experimental studies are presented.

TUPPB022	Mathematical Model of Beam Dynamic Optimization	focusing, emittance, controls, linac	361
	V.V. Altsybeyev St. Petersburg State University, St. Petersburg, Russia
	We treat here the process of simulation of charged particle dynamics using so called hybrid system. Hybrid system is a system with continuous and discrete parts, described by differential and difference equations, respectively. In this case new mathematical model of beam dynamics optimization is suggested. The main parameters of optimization are: coefficient of particle capture in the acceleration mode, phase and energy spectra of particles at the exit of the accelerator, the transverse beam characteristics, etc. Optimization was carried out for the drift tubes accelerator.

WEPPC013	Novel DTL Section for ITEP-TWAC Heavy Ion Injector	rfq, quadrupole, simulation, ion	469
	V. Andreev, N.N. Alexeev, A. Kolomiets, V.A. Koshelev ITEP, Moscow, Russia A.S. Plastun MEPhI, Moscow, Russia
	A novel 81.5 MHz H-type drift tube (DTL) accelerating structure with rf quadrupoles following RFQ in the new injector I-4 for acceleration ions up to energy about 5 MeV/u for ITEP TWAC facility has been proposed. It is based on a combination of a DTL structure and the resonator with magnetic coupling windows. Computer simulations show that it can provide some advantages in comparison with conventional IH-DTL structure. Results of both electrodynamics and beam dynamics computer simulations of the structure as well as a new approach for beam matching RFQ and the section are presented.

WEPPD054	Some Aspects of the Cavity Resonant Frequency Control System Heater Operating Point Choice	linac, cavity, controls, acceleration	665
	V.V. Grechko, G.I. Yamshikov RAS/INR, Moscow, Russia
	To adjust and to stabilize a resonant frequency of the accelerating cavities INR Linac comprises a Cavity Resonant Frequency Control System (CRFCS). The main final control element of the system is an electric heater (EH). Operating point of EH determines power consumption of the system and rf power feed in duration. Electromagnetic noise originated from thyristor regulators of the heaters and influencing linac electronics also depends on the operating point. One of the most sensitive systems is Fast Beam Interlock System (FBIS) intended for prevention of excessive activation and damage of linac components. To exclude false responses of FBIS and to decrease power consumption of CRFCS operating point of the heater has been shifted to a range of smaller power. This approach has been tested during several beam runs with the following results: no false responses of FRIB were observed; the quality of frequency stabilization during beam runs remained at the same level; relatively rare restarts of RF channels did not increase a downtime to beam time ratio; CRFCS power consumption was decreased twice. The rf power feed in duration increased insignificantly.

WEPPD056	Development of INR Linac BCT System	linac, proton, neutron, acceleration	671
	P.I. Reinhardt-Nickoulin, S. Bragin, V. Gaidash, O.V. Grekhov, Yu.V. Kiselev, N.F. Lebedeva, A.N. Mirzojan, A.N. Naboka, I.V. Vasilyev, O. Volodkevich RAS/INR, Moscow, Russia
	New electronics of automatic BCT system was developed to provide beam intensity measurements along INR linac. BCT electronics details are described. The available results of beam measurements are given.

Paper

Title

Other Keywords

Page

WEYCH02

Multipurpose Research Complex Based on the INR High Intensity Proton Linac

linac, cavity, proton, neutron

90

L.V. Kravchuk, A. Feschenko, M.I. Grachev, V.L. Serov
RAS/INR, Moscow, Russia

Funding: Russian Academy of Science
Scientific Complex based on the 600 MeV Proton Linac is under operation at the INR, Troitsk, Moscow to provide both basic and applied research. At the moment proton beam from the Linac with energy about 210 MeV and average current about 130 μA is transporting to the Experimental Area to be use for following facilities: three Spallation Neutron sources, the Isotope Production facility and the Beam Therapy complex. Status of the Linac and Experimental Area as well as the tuning procedures to decrease particle loss in high-intensity mode of operation are given in the paper.

Slides WEYCH02 [2.281 MB]

FRBCH02

Project of Low-Energy Accelerator Driven Power Plant

target, neutron, proton, linac

224

A.G. Golovkina, D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia
A.A. Bogdanov, I.V. Kudinovich, V.P. Struev
AN Krylov SRI, St. Petersburg, Russia
Y.A. Svistunov
NIIEFA, St. Petersburg, Russia

Project of low-energy accelerator driven nuclear power plant is considered. The accelerator driven system (ADS) with subcritical fast reactor, proton linac and fissile target is proposed. The main performance data of the ADS: proton beam energy 300-400 MeV, accelerator average current 5 mA, reactor thermal power 200 MW, core effective multiplication factor Keff=0.98. The principal design features of the power plant are also represented.

Slides FRBCH02 [2.663 MB]

MOPPA022

Status of INR DTL RF System

cavity, linac, vacuum, cathode

293

A.I. Kvasha, A. Feschenko, V.L. Serov
RAS/INR, Moscow, Russia

INR Linac is in regular operation since 1993. The accelerator incorporates DTL and DAW structures operating at 198.2 MHz and 991 MHz correspondingly. Initially two types of high power vacuum tubes specially designed for INR linac (GI-54A for final amplifier and GI-51A for intermediate amplifier) were used in DTL RF power system. However production of these tubes has been terminated resulting in a need of DTL RF system upgrade. The main goal of the recent upgrade is replacement of the old tubes by modern ones. The difficulty of replacement arises due to a need to minimize mechanical changes of the existing equipment. Another goal is improving of operational reliability. The reliability depends on vacuum tube reliability and to a large extent - on crowbar operation. The results and the experience of INR DTL RF system upgrade are presented

MOPPA023

Investigation of INR DTL RF System Operation at 100 Hz Repetition Rate

cathode, cavity, linac, controls

296

V.L. Serov, A.N. Drugakov, A. Feschenko, A.I. Kvasha, A.N. Naboka
RAS/INR, Moscow, Russia

INR Linac has been operating with 50 Hz beam repetition rate so far. Increasing the repetition rate up to 100 Hz is of importance as it results in doubling of the beam intensity. To solve the task several accelerator systems must be modernized but the most critical one is the DTL rf system (up to 100 MeV). The problems related to the DTL rf system repetition rate increasing are described. One of them is a 50 Hz modulation of a 100 Hz rf pulse sequence. Though the instabilities of accelerating field due to the modulation are reduced by the feedback systems, nevertheless exploration of the effect and its minimizing is of importance. The analysis of the effect is given and the results of experimental studies are presented.

TUPPB022

Mathematical Model of Beam Dynamic Optimization

focusing, emittance, controls, linac

361

V.V. Altsybeyev
St. Petersburg State University, St. Petersburg, Russia

We treat here the process of simulation of charged particle dynamics using so called hybrid system. Hybrid system is a system with continuous and discrete parts, described by differential and difference equations, respectively. In this case new mathematical model of beam dynamics optimization is suggested. The main parameters of optimization are: coefficient of particle capture in the acceleration mode, phase and energy spectra of particles at the exit of the accelerator, the transverse beam characteristics, etc. Optimization was carried out for the drift tubes accelerator.

WEPPC013

Novel DTL Section for ITEP-TWAC Heavy Ion Injector

rfq, quadrupole, simulation, ion

469

V. Andreev, N.N. Alexeev, A. Kolomiets, V.A. Koshelev
ITEP, Moscow, Russia
A.S. Plastun
MEPhI, Moscow, Russia

A novel 81.5 MHz H-type drift tube (DTL) accelerating structure with rf quadrupoles following RFQ in the new injector I-4 for acceleration ions up to energy about 5 MeV/u for ITEP TWAC facility has been proposed. It is based on a combination of a DTL structure and the resonator with magnetic coupling windows. Computer simulations show that it can provide some advantages in comparison with conventional IH-DTL structure. Results of both electrodynamics and beam dynamics computer simulations of the structure as well as a new approach for beam matching RFQ and the section are presented.

WEPPD054

Some Aspects of the Cavity Resonant Frequency Control System Heater Operating Point Choice

linac, cavity, controls, acceleration

665

V.V. Grechko, G.I. Yamshikov
RAS/INR, Moscow, Russia

To adjust and to stabilize a resonant frequency of the accelerating cavities INR Linac comprises a Cavity Resonant Frequency Control System (CRFCS). The main final control element of the system is an electric heater (EH). Operating point of EH determines power consumption of the system and rf power feed in duration. Electromagnetic noise originated from thyristor regulators of the heaters and influencing linac electronics also depends on the operating point. One of the most sensitive systems is Fast Beam Interlock System (FBIS) intended for prevention of excessive activation and damage of linac components. To exclude false responses of FBIS and to decrease power consumption of CRFCS operating point of the heater has been shifted to a range of smaller power. This approach has been tested during several beam runs with the following results: no false responses of FRIB were observed; the quality of frequency stabilization during beam runs remained at the same level; relatively rare restarts of RF channels did not increase a downtime to beam time ratio; CRFCS power consumption was decreased twice. The rf power feed in duration increased insignificantly.

WEPPD056

Development of INR Linac BCT System

linac, proton, neutron, acceleration

671

P.I. Reinhardt-Nickoulin, S. Bragin, V. Gaidash, O.V. Grekhov, Yu.V. Kiselev, N.F. Lebedeva, A.N. Mirzojan, A.N. Naboka, I.V. Vasilyev, O. Volodkevich
RAS/INR, Moscow, Russia

New electronics of automatic BCT system was developed to provide beam intensity measurements along INR linac. BCT electronics details are described. The available results of beam measurements are given.