Control and diagnostic systems
Paper Title Page
WECDMH02
 Testing of Electronic Components at FLNR JINR Accelerator Complex: Current Status and the 7-Year Roadmap  
 
  • S. Mitrofanov, B. Gikal, G.G. Gulbekyan, I.V. Kalagin, N.F. Osipov, S.V. Paschenko, V.A. Skuratov, Yu.G. Teterev
    JINR, Dubna, Moscow Region, Russia
  • V.S. Anashin
    United Rocket and Space Corporation, Institute of Space Device Engineering, Moscow, Russia
  
  To meet the growing requirements of the Russian Space Agency (Roscosmos) in the electronic components testing, the first dedicated beamline was created in 2011. At 2014 the full value facility, consisted of three different beamlines, was successfully commissioned and routinely used. Since then, plenty of efforts were spent for upgrade of beamlines and elaboration of new methods of high energy heavy ion beam parameters evaluation and control under the SEE testing. The current status of the facility, the last news of the ion beam control at high level of LTE and the 7-year roadmap will be presented.  
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THCBSH01 INR RAS Instrumentation for Bunch Shape and Beam Cross-Section Monitoring 204
 
  • S.A. Gavrilov, A. Feschenko, P.I. Reinhardt-Nickoulin
    RAS/INR, Moscow, Russia
  
  Instruments for bunch shape and beam cross-section diagnostics at ion linacs are as important as complicated devices. Widespread Bunch Shape Monitors developed in INR RAS are used during a linac commissioning and optimization of beam dynamics. Beam Cross-Section Monitors implemented at INR RAS linac provide efficient non-destructive beam tuning and control. Features of both monitors investigated in simulations and beam tests are described. A variety of experimental results are presented.  
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THCBSH02 Structure and Hardware of LIA-20 Control System 207
 
  • G.A. Fatkin, A.O. Baluev, A.M. Batrakov, E.A. Bekhtenev, A.G. Chupyra, E.S. Kotov, Ya.M. Macheret, V.R. Mamkin, A.V. Ottmar, A. Panov, A.V. Pavlenko, A.N. Selivanov, P.A. Selivanov, A.I. Senchenko, S.S. Serednyakov, K.S. Shtro, S.R. Singatulin, M.Yu. Vasilyev
    BINP SB RAS, Novosibirsk, Russia
  • E.A. Bekhtenev, G.A. Fatkin, A.V. Pavlenko, A.I. Senchenko, S.S. Serednyakov
    NSU, Novosibirsk, Russia
  
  The control system of a linear induction accelerator LIA-20 for radiography is presented in this paper. The accelerator is designed to provide a series of three consecutive electron pulses with energy up to 20 MeV, current 2 kA and lateral size less than 1 mm. To allow reliable operation of the whole complex, coordinated functioning of more than 700 devices must be guaranteed in time frames from milliseconds to several nanoseconds. Total number of control channels exceeds 6000. The control system structure is described and the hardware in VME and CAN standards is presented.  
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THCBSH03
 National Instruments Software and Hardware for Control, Diagnostics and Measurement for Particle Accelerators  
 
  • A.S. Usenya, A.V. Konyashin, A.V. Mayzel
    National Instruments, Moscow, Russia
  
  Engineers, scientists, and physicists around the world are working on high-energy physics with particle accelerators. It's common for these domain experts to need hardware and software that meets their measurement, diagnostic, control, interlock, and safety system requirements. From programming multicore embedded real-time systems that contain FPGAs to working with high-speed data acquisition systems that require timing and synchronization, National Instruments offers commercial off-the-shelf (COTS) software and hardware to help meet these needs.  
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TUPSA024 On Stabilization of Systems of Linear Equations with Linear Increasing Time Delay by Observation 261
 
  • O.N. Chizhova, A.P. Zhabko
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Differential-difference equations with time delay are often used in mathematical models describing the dynamics of beams of the charged particles. For example linear equation of the second order with a constant time delay describes in the smoothed approach dynamics of a beam of the charged particles in synchrotrons with a feedback system. However the time delay cannot always be considered constant. The time proportional delay can occur at acceleration of beams of the charged particles in the cyclotron. It should be noted that such time delay is unbounded and well known approaches are not applicable for stability analysis such systems. The stabilizing control for the system of linear equations could be constructed by the information on a state vector of the system. Sometimes the state vector is unknown but we know some linear combinations of its components. Then there is a problem on construction of the stabilizing control with incomplete information. In this paper we investigate a possibility of stabilization of system of linear equations with time proportional delay by the linear observation. Using the sufficient conditions of asymptotic stability of system of linear equations with linear increasing delay we obtain some conditions of existence of the asymptotic evaluation system of the original system. Then we use the asymptotic evaluation system for the construction of the stabilizing control and derive the sufficient conditions for the existence of such control.  
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WEPSB035 Model of the Optimal Parameters Choice for the Charged Particles Beam 437
 
  • S.A. Nemnyugin, O.A. Malafeyev
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Problem of the optimal parameters choice for the charged particles beam is considered. The beam is characterized by the set of control parameters and multiple parameters which characterize its quality. So multiple criteria of optimization should be taken into account. Among possible criteria of optimization following ones should be mentioned: energy, intensity, biological efficiency and so on. It is assumed that in general case choice of the control parameters which is optimal for all criteria is not possible. The problem is formulated as the conflict control problem. The case is considered when parameters which should be optimized forms the vector. Finding of the compromise solution is considered. The method and computing algorithms are proposed. Present work is further extension of *.
* G. V. Alferov, O. A. Malafeyev, S. A. Nemnyugin. Charged Particles Beam Focusing with Uncontrollable Changing Parameters // 2014 2nd International Conference on Emission Electronics, Proceedings, 2014. P. 25-27. 		 
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THPSC044
 Beam transfer line alignment and tuning for the HUST THz-FEL  
 
  • K.F. Liu, Q.S. Chen, T. Hu, Z.K. Liang, X. Liu, B. Qin, P. Tan, Y.Q. Xiong, J. Yang
    HUST, Wuhan, People's Republic of China
  • Y.J. Pei, W. Wang
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  
  A compact FEL oscillator is constructed to provide THz radiation through 30um to 300um in Huazhong University of Science and Technology (HUST). This project is proposed to produce a type of cost-effective THz source with table-top scale for civil use. So that, besides high performance, an extreme compact layout has been pursued in design and system assembly, by compressing beam line elements and simplifying diagnostic system under the premise of sufficient accuracy. Which means some obstacles come out in beam commissioning, such as inadequate online observation and tuning manners. This paper describes the assembly scheme and beam diagnostic methods for the HUST THz-FEL prototype, reports how to implement beam-based alignment for the transfer line and gives experiment results respectively.  
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THPSC045
 Localisation of RF Breakdown Point in a Coaxial Load Linac Structure  
 
  • Q.S. Chen, M. Fan, T. Hu, J. Huang, B. Qin, P. Tan, Y.Q. Xiong, J. Yang
    HUST, Wuhan, People's Republic of China
  • Y.J. Pei
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  • T. Yu
    Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
  
  A compact terahertz free electron laser (THz-FEL) prototype has been built up in Huazhong University of Science and Technology (HUST). In the prototype, a 0.85m long linac was designed to deliver electron beams with maximum energy of 14MeV and coaxial absorbing load instead of output coupler was selected to achieve a compact structure. In this case, no transmitted power signal could be used to determine the RF breakdown point (RFBP) in the linac cavity. Here we reported how the RFBP can be localized with just the input and reflected power signals through two methods. One refers to the analysis of time delay of the two signals and the other refers to the calculation of amplitude of the two signals. Quantitative analysis showed the two methods were well consistent with each other and indicated the RFBP located at the end of the linac cavity.  
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THPSC046 High-Power High-Temperature Graphite Beam Dump for E-Beam Irradiation Test of Prototype IF Target in RISP 632
 
  • V. Gubin
    Institute of Laser Physics, SB RAS, Novosibirsk, Russia
  • J.Y. Kim, J.-W. Kim, Y.H. Park
    IBS, Daejeon, Republic of Korea
  • Yu. Maltseva, P.V. Martyshkin
    BINP SB RAS, Novosibirsk, Russia
  
  Nowadays project RISP is developed in IBS, Daejeon. One of the main project device is graphite target system meant for production of rare isotopes by means of the in-flight fragmentation (IF) technique. The power inside the target system deposited by the primary beam with energy of 200 MeV/u is estimated to be around 100 kW. The target represents rotating multi-slice graphite disc cooled by thermal radiation. Necessary step of target development is integrated test of target prototype under high power electron beam modelling real energy deposit into target. This test is planned to be held in BINP, Novosibirsk, with the use of ELV-6 accelerator. Heavy-ion beam will be modelled by the e- beam of ELV-6 accelerator with diameter down to ~1 mm and energy 800 keV (minimum possible). IF target is not full stopping target for an electron beam with energy 800 keV. Considerable part of beam energy will be not absorbed by a target material and must be deposited into special beam dump. In this paper the design of beam dump of the graphite cone geometry cooled by thermal irradiation is described.  
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THPSC047 A Faraday Cup for a Low Charge LWFA Electron Beam Measurement 635
 
  • V. Gubin, V.I. Trunov
    Institute of Laser Physics, SB RAS, Novosibirsk, Russia
  • V.V. Gambaryan, A.E. Levichev, Yu. Maltseva, P.V. Martyshkin, A.A. Pachkov, S.N. Peshekhonov
    BINP SB RAS, Novosibirsk, Russia
  
  Nowadays laser wakefield acceleration (LWFA) is considered as one a perspective method for GeV electron beam production. Combination of laser accelerated electrons and Compton backscattering of probe light beam opens possibility to create the table top source of femtosecond light beam in x-ray and gamma range. Project of laser-driven Compton light source started in ILP SB RAS in collaboration with BINP SB RAS. Production of 1-10 pC electron beams sub-ps time range duration with energies up to 100 MeV is expected as a result of the first stage of the project. Since energy of electrons does not exceed of 100 MeV, it allows using Faraday cup (FC) with reasonable dimensions, instead of commonly used integrating current transformer (ICT). Geometry of FC was optimized taking into account of beam stopping simulation as well as low capacity requirement. RF properties, simulation of the system operation were carried out. System has been tested at the VEPP-5 electron linac. Results of development and testing of this FC are presented.  
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THPSC048 Measurement of Gamma Beams Profile by Cherenkov Radiation in Fibers 638
 
  • A.V. Vukolov, A.I. Novokshonov, A. Potylitsyn, E. Shuvalov, S.R. Uglov
    TPU, Tomsk, Russia
  
  Funding: This work was partially supported by the Russian Ministry of Education and Science within the program 'Nauka' Grant 3.709.2014/K and by RFBR Grant 15-52-50028-YaFa.
Results of gamma beam profile experimental investigations by measuring of Cherenkov radiation* generated in a fiber with 0.6 mm thickness and in a glass rod with 5 mm diameter are presented. These experiments were carried out on bremsstrahlung beam of the linear accelerator 'Philips SL-75' with 6 MeV energy and 4 Gr/min dose rate at 1 m distance. In works ** and *** authors have showed feasibility of Cherenkov radiation applying for high energy beam diagnostics. In our work the Cherenkov radiation yield dependence on the fiber orientation relative to the beam axis was investigated and showed that the maximal light yield corresponds to the angle between fiber and beam axes closed to the Cherenkov angle. When dose rate is higher than 1 Gr/min at 1 m distance one can register a light yield for the fiber orientation even less than Cherenkov angle. We suppose that the observed effect is connected with generating of electromagnetic shower by initial photons. Proposed technique of bremsstrahlung and electron **** beams profile measurements differs from well-known techniques based on ionization chambers due to its insensitive to low energy part of the bremsstrahlung spectrum and to undesirable background. Using this technique for beam profile scanning it is possible to construct compact and noise insensitive device relative to the well-known systems. It is also possible to reach submillimeter resolution with this device.
* Jelley J V, Cherenkov Radiation and its Application, 1958, Pergamon Press.
** Wulf F, Korfer M, Proc. of DIPAC 2009, p. 411.
*** A. Murokh, R. Agustsson etc., Proc of IPAC2012, p.996.
**** A V Vukolov, A I Novokshonov, A P Potylitsyn, S R Uglov, Proc of RREPS-15, 2015, Sain-Petersburg 		 
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THPSC049 Dielectric Chart as a Tool for Diagnosis of Dielectric Materials 641
 
  • V.A. Klemeshev, A.G. Karpov
    St. Petersburg State University, St. Petersburg, Russia
  
  One of the most informative diagnostic methods dielectric materials is the analysis of the complex permittivity depending on the frequency of the electric field*. Dielectric chart is the dependence of the imaginary part of the complex permittivity of its real part. Thus, difference between the real dielectric chart from the reference or change it during the operation can be a means of diagnostics of dielectric materials. Dielectric chart in the classical theory of Debye is a semicircle with its center lying on the real axis. For solid dielectric the dielectric chart deviation from the semicircle can be quite large, but it still remains a circular arc. This deviation is characterized by parameter a (in the case of the Debye a=0). To clarify the physical meaning of the deviations of the experimental data on the Debye theory, expressed in the value of a, several possible causes have been considered: the effect hindered reorientation of dipoles, the effect of the non-sphericity of the molecules, the complex nature of viscosity. However, the main cause of deviations, in our opinion, is the availability of the distribution of relaxation times around a central relaxation time, in particular, due to defects in the sample. Gaussian distribution width increases rapidly with increasing a. In this paper we propose an algorithm for calculating a, allowing you to quickly determine the condition of the sample on a single parameter.
* Karpov A.G., Egorov N.V. An Automated dielectrometer. // Pribory i tehnika eksperimenta.- 1999.- 6.- P.63-67. 		 
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THPSC050 Possibilities of Diffraction Radiation Non-Destructive Diagnostics for Non- and Moderately Relativistic Beams 644
 
  • D.A. Shkitov, A. Potylitsyn
    TPU, Tomsk, Russia
  
  Funding: The work was partially supported by the RFBR grant No 15-52-50028.
In order to design and construct new modern accelerators with high brightness beams, the development new non-destructive diagnostic tools for accelerated beams is required. Diffraction radiation (DR) is generated by charged particles moving in the vicinity of the conductive target. The DR technique is used successfully for non-destructive diagnostics for ultrarelativistic beams*,**. For non-relativistic and moderately relativistic charged particles beams (g ~ a few tens or less, g is the Lorentz factor) non-destructive DR diagnostics can be applied also if a beam intensity is high enough due to coherent effect. Intensity of coherent radiation is proportional to the squared bunch population. In this report estimations of non-destructive bunch diagnostics possibility based on DR for the beam parameters of a few machines are presented. Those estimations were performed for electron machine: PITZ project*** and laser wakefield accelerator****, and moreover for ESS proton linear accelerator*****. First evaluation of whole wavelength range DR from 4-mm-slit target gave about 56 mJ from one macro-pulse of ESS accelerator. Amplification of DR spectral-angular intensity due to coherent effect will be in N = 108 times than incoherent radiation from the same beam, where N is the bunch population.
* P. Karataev et al., PRL 93 (2004) 244802
** A. Cianchi et al., PRST-AB 14 (2011) 102803
*** http://pitz.desy.de
**** B.S. Rao et al., PRST-AB 17 (2014) 011301
***** https://europeanspallationsource.se 		 
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THPSC051 The Magnetic Energy Analyzer for Electron Beam Of LUE-200 Linac of IREN Facility 647
 
  • A.P. Sumbaev, V.I. Shokin, N.I. Tarantin
    JINR, Dubna, Moscow Region, Russia
  
  Theses for a base substantiation, results of the calculation for the electron optical parameters and design features of the magnetic energy analyzer for the beam of the electron LUE-200 linac are presented. The static dipole magnet with homogeneous transverse field and with a combined functions (the functions of a spectrometer and of a spectrograph) established after the second accelerating section, allows to spend measurements in a wide energy range of the analyzed particles up to 224 MeV with the instrumentation resolution not worse ± 5 %.  
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THPSC052 The Longitudinal Broadband Impedance and Energy Spread Measurements at VEPP-4M 650
 
  • V.M. Borin, V.A. Kiselev, G.Y. Kurkin, O.I. Meshkov, S.A. Nikitin, M.A. Skamarokha
    BINP SB RAS, Novosibirsk, Russia
  • V.L. Dorokhov
    BINP, Novosibirsk, Russia
  
  The paper presents studies of the longitudinal broadband impedance of VEPP-4M and measurements of its bunch energy spread at different energies in range of 1.45 - 3.5 GeV. In order to measure the longitudinal bunch size at different currents we used PS-1/S1 streak camera with picosecond temporal resolution. Considering that influence of collective effects is negligible at low currents we determined bunch energy spread from its length at low currents. Collected bunch length data demonstrate microwave instability thresholds and potential well distortion lengthening. Potential well distortion was studied at 3 GeV and 3.5 GeV. Measured potential well distortion lengthening was used to estimate a value of the reactive part of the longitudinal impedance. Observed microwave instability thresholds was used to measure the value of broadband impedance. Measured value of the VEPP-4M is 7.9 ± 1.5 Ohm.  
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THPSC053 The Pepper-Pot Emittance Measuring Device at the 400 keV H-minus LEBT Channel 653
 
  • V.S. Klenov, S. Bragin, O.T. Frolov, S.E. Golubovski, O.V. Grekhov, O. Volodkevich, V. Zubets
    RAS/INR, Moscow, Russia
  
  The emittance measuring device has been developed for operational control of INR RAS linac 400 keV H-minus injector beam parameters. It includes the "pepper-pot", the quartz screen, the CCD camera, PC, the software for camera data processing and beam phase portrait formation. The device has been mounted at the first straight section extension of H-minus LEBT after 45 degree bending magnet. When the bending magnet is switched off the device is possible to measure and to represent single shot beam phase portrait. The results of the H-minus beam emittance measurements and the device performance have been discussed.  
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THPSC054 Modernization of the Electron Beam Stabilization System in the KSRS 656
 
  • K. Moseev, E.V. Kaportsev, Y.V. Krylov, A.G. Valentinov
    NRC, Moscow, Russia
  
  The stabilization system is designed to prevent drift of the spot SR at the experimental stations by local changes of the orbit. This system was developed and implemented about twelve years ago as an element of the ACS and worked well. Produced by modernization has led to the need of adaptation of the system of stabilization not only in hardware but also in software. Work on updating of the stabilization system and will be shown next.  
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THPSC055 Electrodynamic Characteristics of RF-Deflector for Bunch Shape Monitor 659
 
  • D.A. Chermoshentsev, A. Feschenko, S.A. Gavrilov
    RAS/INR, Moscow, Russia
  • D.A. Chermoshentsev
    MIPT, Dolgoprudniy, Moscow Region, Russia
  • D.A. Chermoshentsev
    Skoltech, Moscow, Russia
  
  Bunch shape monitors, based on a transverse RF-scanning of secondary electrons, are used for measurements of particles longitudinal distribution in bunches at different linear ion accelerators. The phase resolution of such monitors depends crucially on accuracy of fabrication and tuning of RF-deflector, thus preliminary simulations of its electrodynamic characteristics are of importance for subsequent commissioning of the monitor. Simulations of some basic operational electrodynamic parameters and results of experimental measurements are presented.  
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THPSC056 Proposal to Symmetric Quench Detection at Superconducting Elements by Bridge Scheme Usage 662
 
  • E.V. Ivanov
    JINR, Dubna, Moscow Region, Russia
  • A.O. Sidorin, A.L. Svetov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  
  In the frame of the NICA project two new superconducting accelerators will be constructed - the Booster and the NICA collider. Specialized facility for manufacturing and testing of the SC magnets for the NICA and FAIR projects is under development at JINR. Proposal to quench detection system for these and similar facilities is described in this paper.  
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THPSC057 Application of Model Independent Techniques at VEPP-2000 and SIS100 664
 
  • D.V. Rabusov, Yu. A. Rogovsky
    BINP SB RAS, Novosibirsk, Russia
  
  In order to exploit an accelerator successfully all parameters should be set correctly. To check and fix errors in the accelerator lattice measurements of parameters of the betatron motion and measurements of optical functions of the accelerator lattice are used. Due to Model Independent Analysis it is possible to carry out measurements of the beta-function and the phase advance fast. Using NAFF technique lets us compute betatron tune with good precision. Limiting capabilities of the MIA at SIS100 project are discussed, the first results of the application of MIA and NAFF techniques at booster VEPP-5 and at collider VEPP-2000 are shown.  
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THPSC058 Beam Diagnostics and Instrumentation Upgrade for Multipurpose Research Complex of INR RAS 667
 
  • S.A. Gavrilov, V. Gaidash, V.K. Gorbunov, Y.Z. Kalinin, Yu.V. Kiselev, P.I. Reinhardt-Nickoulin, I.V. Vasilyev
    RAS/INR, Moscow, Russia
  
  Accelerated proton beam of INR linac is used for various facilities in multipurpose research complex of INR RAS, including experiments of neutron investigations and medical physics laboratories. In recent years beam instrumentation for transport channels of the complex has been upgraded and supplemented. Electrostatic pick-ups, beam current transformers, ionization chambers, multiwire SEM-grids, as well as its front-end and processing electronics were developed and combined to improve beam diagnostics. Some technical details and available results of beam measurements are presented in the paper.  
poster icon Poster THPSC058 [7.154 MB]  
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THPSC059 Thermal Loads of Wire-Based Beam Instrumentation at Ion Linacs 670
 
  • M.M. Churaev, S.A. Gavrilov
    RAS/INR, Moscow, Russia
  • M.M. Churaev
    Skoltech, Moscow, Russia
  • M.M. Churaev
    MIPT, Dolgoprudniy, Moscow Region, Russia
  
  Wire-based beam instrumentation remains a reference for calibration of many other instruments, providing direct and accurate measurements with high resolution. However beam power increasing of existing and forthcoming ion linacs results in strict constraints on operation modes acceptable for control and diagnostics. Relevant simulations of wire thermal loads are necessary not only for a mode choice, but also for a preliminary design of such instrumentation. Simulations for different wire materials and various beam parameters are made. Features of the model are discussed. Numerical estimations and conclusions are presented in comparison with some experimental results.  
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THPSC060 The Longitudinal Distribution and Bunch Length Measurements at VEPP-2000 Collider 673
 
  • Yu. A. Rogovsky, E. Perevedentsev, V. Volkov, Yu.M. Zharinov
    BINP SB RAS, Novosibirsk, Russia
  
  The paper describes the bunch length measurement system for VEPP-2000 collider, equiped with optical analysers based on LI-602 dissector, which provides permanent measurements of the longitudinal beam profile. Potential well distorsion lengthening was measured at different bunch currents for the energies below 500 MeV. First measurements reveals the presence of microwave instabilty with turbulent emittance growth. The thresholds of these processes was used to estimate the values of reactive part of the longitudinal impedance. Measured energy loss factors was compared with computer simulations for the RF cavity. All results will be discussed and further estimations will be given.  
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THPSC061 Beam Diagnostics Overview for Collector Ring at FAIR 676
 
  • Yu. A. Rogovsky, E.A. Bekhtenev, M.I. Bryzgunov, O.I. Meshkov
    BINP SB RAS, Novosibirsk, Russia
  • O. Chorniy
    GSI, Darmstadt, Germany
  
  The Collector Ring (CR) is a dedicated storage ring in the FAIR project, where the main emphasis is laid on the effective stochastic precooling of intense secondary beams of stable ions, rare isotopes or antiprotons. A complex operation scheme with several types of operational cycles with beams in CR starting from injection, RF gymnastics, stochastic cooling then, and finishing to extraction is foreseen. Beam parameters changes significantly during the cycles. This demands an exceptional high dynamic range for the beam instrumentation. Non-destructive methods are mandatory for high currents as well as for the low current secondary beams due to the low repetition rate. Precise measurements of all beam parameters and automatic steering with short response time are required due to the necessary exploitation of the full ring acceptances. An overview of the challenges and solutions for various diagnostic installations will be given.  
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THPSC062
 System for Diagnostics of Local Electron Beam Losses in Microtron-Recuperator at Novosibirsk Free Electron Laser Beamline via Registration of Induced X-Rays  
 
  • S.S. Serednyakov, M.A. Scheglov
    BINP SB RAS, Novosibirsk, Russia
  • E.N. Dementiev
    Budker INP & NSU, Novosibirsk, Russia
  
  The Novosibirsk Free Electron Laser (FEL) is based on a 4-turn microtron-recuperator. To ensure its stable operation and radiation generation, it is necessary to provide a stable mode of electron beam recirculation and minimize beam losses on the vacuum chamber wall on all the way of beam in the accelerator beamline. To fulfil this task it is necessary to know the longitudinal distribution of these losses along the beamline. To this end, a system for registration of beam losses was created. The system applies optical fibers placed along the full length of the vacuum chamber and nearby it. In case of local electron beam losses somewhere in the vacuum chamber, electrons falling to the vacuum chamber wall cause generation of X- and gamma rays. This radiation in turn causes generation of optical radiation in the optic fiber nearby the region of electron 'precipitation' on the chamber wall. Then, executing some transformation and processing of the time dependencies of signals from these optic fibers, one can obtain the longitudinal distribution of electron beam losses along the whole accelerator channel in all its 4 turns.  
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THPSC063 System of Thermomonitoring and Thermostabilizing of Kurchatov Synchrotron Radiation Source 680
 
  • N.I. Moseiko, E.V. Kaportsev, K. Moseev, A.G. Valentinov
    NRC, Moscow, Russia
  • Y.V. Krylov
    RRC, Moscow, Russia
  
  The modern system of thermomonitoring and thermostabilizing (TERMOCS) of KSRS - Kurchatov synchrotron radiation source is described. The TERMOCS system provides: a monitoring of temperatures of the magnets and RF-resonators of KSRS; informing operator on violations of the course of technological process; data protection from illegal access; an archiving and displaying of archive data in a trend type. The system includes 480 temperature sensors of the AD592 type, providing the accuracy of measurements 0,2 C. System of thermo stabilizing of the linear accelerator - the proportional integral differentiating regulator for support of stability of temperatures at the level of 0,05 C. During creation of the system the modern decisions on the basis of the modular complexes of NI, the modern servers and the Citect SCADA software system were used.  
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THPSC064 Monitoring of Low Intensity Ion Beams at FLNR Accelerator Complex 683
 
  • S. Mitrofanov, Yu.G. Teterev
    JINR, Dubna, Moscow Region, Russia
  • A.I. Krylov
    JINR/FLNR, Moscow region, Russia
  
  FLNR JINR host experimental researches in wide area of applied science, including medical, biological and radiation hardness investigations, where the beam diagnostics plays the key role. We provide beam monitoring at all stages of the experiment: inside the cyclotron, beam transport and ion beam profile visualization close to the physical target. The detailed overview of beam control and diagnostic solutions used in FLNR JINR for the low intensity and highly charged ion beams parameters evaluation will be presented.  
poster icon Poster THPSC064 [4.715 MB]  
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THPSC065 Diagnostics of Accelerator Beams by the Dependence of the Vavilov-Cherenkov Radiation Intensity on the Refractive Index of the Radiator "n" 686
 
  • K.A. Trukhanov
    SSC RF- IBMP RAS, Moscow, Russia
  • A.I. Larkin
    NRNU, Moscow, Russia
  • V.I. Shvedunov
    MSU, Moscow, Russia
  
  The report presents the results of development the method TLSH* for finding of the particle speed distribution (PSD) in beams of accelerators. PSD is deduced from the Volterra integral equation of the first kind with the right part, which is by the dependence of Cherenkov radiation intensity (ChRI) from n, experimentally obtained for the given beam. PSD is the second derivative of ChRI. The problem of stability of the second derivative is solved by attracting the priori information (for example, nonnegative of the solution). Using optical dispersion of radiator is discussed. It enables to find PSD even in the single cluster of particles. The possibility of determining the PSD in the cross section beam is discussed too. The method also enables to find PSD upon a noticeable transverse speed of the particles in the beam. The method is virtually non-destructive in many cases.
*Measurement of the distributions of particle velocity in the accelerator beam on the basis of the Vavilov-Cherenkov radiation at optical and microwave ranges. Trukhanov K. A., Larkin A. I., Shvedunov V. I. Izv. RAS. Ser. Phys. 2010. V. 74, No. 11, Pp. 1665-1668. 		 
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THPSC066
 Diagnostics the Structure of Liquid-Crystal Phase on the Basis of Changes the Spectra of Dyes  
 
  • T.A. Andreeva, M.E. Bedrina
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Molecule of 4-pentyl-4'-cyanobiphenyl (CB5), its dimers and their interaction with such dyes as diaminonitrobenzol, nitrozodimethylaniline and dimetilaminonitrostirol were investigated by the method of density functional theory (DFT). The electronic absorption spectra of isolated dye molecules and the resulting complexes with 4-pentyl-4'-cyanobiphenyl were calculated. It was shown that the shift of the absorption bands in the spectra of the dye depends on the structure of the complex. The shift and splitting of the bands minor impurity dye molecules placed in the liquid crystal gives an indication of the mesophase structure.  
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THPSC074 Longitudinal Beam Distribution Measurements in Damping Ring of VEPP-5 Injection Complex 705
 
  • V.V. Balakin, O. Anchugov, D.E. Berkaev, F.A. Emanov, G.Y. Kurkin, O.I. Meshkov
    BINP SB RAS, Novosibirsk, Russia
  • V.L. Dorokhov
    BINP, Novosibirsk, Russia
  
  Injection Complex VEPP-5 was turned into operation in the end of 2015 in the Budker Institute of Nuclear Physics (Novosibirsk, Russia). The main task of the facility is production, acceleration and transportation of high intensity electron and positron beams for two BINP's colliders. Now, VEPP-5 successfully delivers electron and positron beams to the collider VEPP-2000 and ready to start operation with the acceleration complex VEPP-4M. Beam diagnostics issues are very important for VEPP-5 facility tuning during the operation. Longitudinal beam diagnostic based on synchrotron radiation in the VEPP-5 Damping Ring is presented in the article. Equipment operation principle, main measurement results and future prospects are presented in this paper.  
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THPSC075
 Two-Section Ionization Chambers for Monitoring Beams of Protons of Variable Energy  
 
  • V.V. Pashuk, D.A. Amerkanov, G.I. Gorkin, E.M. Ivanov, Ivanov, N.A. Ivanov, O.V. Lobanov
    PNPI, Gatchina, Leningrad District, Russia
  
  In the process of creating a bench for radiation tests of electronic products on the synchrocyclotron of the PNPI absolute monitor, providing on-line measurement of the total number of protons with energy of 64 - 1000 MeV in the range fluxes of 106 - 109 s−1 with a cross section of the beam 2 - 20 cm2, was developed and extensively investigated. As detector we use a two-section ionization chamber filled with air at normal pressure. It structurally consists of two ionization chambers with different interelectrode distances, combined into a single module. Electrodes made of aluminum foil with a thickness of 10 mkm. The number of protons that have passed through the two-section ionization chamber, is calculated in real time according to the developed algorithm. Experimental information about the total number of protons and the average value of the flux of protons is displayed on the screen of the computer monitor. Photographic images of the proton beam of various energy were used for the analysis of the density distribution of protons in the beam. With their help, the method of computing the number of protons falling on any given area of the irradiated object was developed and experimentally verified.  
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THPSC076 Host-Based System to Control the Accelerator 709
 
  • V.N. Zamriy
    JINR, Dubna, Moscow Region, Russia
  
  The report discusses development of the host-based data acquisition system to control the accelerator. We consider modes of timing and allocation of operations of the system node. The time of any working cycle, rate of a data flow and an amount of serviced tasks are coordinated with characteristics of the node. Estimations of the readout rate of the data and the waiting time demonstrate the system efficiency. The data acquisition technique has been developed to provide checking of pulse parameters and control the linac LUE-200 of the neutron source IREN*.
* Ju. Becher et al. "The LUE-200 accelerator at the IREN facility: current status and development", Physics of Elementary Particles and Nuclei: Letters, 11, 1029-1039 (2014). 		 
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THPSC077 Control System for the 1 MW Neutral Beam Injector 712
 
  • V.V. Oreshonok, V.V. Kolmogorov
    BINP SB RAS, Novosibirsk, Russia
  • A.N. Karpushov
    SPC-EPFL, Lausanne, Switzerland
  • V.V. Oreshonok
    NSU, Novosibirsk, Russia
  
  Funding: This work supported in part by the Swiss National Science Foundation.
This paper presents general description of hardware and software of the neutral beam injector control system. The system is developed for control of the neutral beam injector which operates with 15-25 keV deuterium and hydrogen beams of 2 s maximum duration. It performs injection parameters calculation according to the desired beam power vs time curve, synchronizes and protects the injector subsystems and acquires its data during the shot. It also controls the injector operation between the shots. The system is based on an industrial computer with National Instruments PCIe boards: two PCIe-7842R reconfigurable input-output modules and a PCIe-6323 data acquisition module. An in-house developed interfacing module (cross-box) as well as serial to fiber optic converters are used for galvanic isolation and electrical compatibility with the injector subsystems. User interface software and PCIe boards programmable logic firmware are implemented in LabVIEW. Injection calculations and results acquired are represented with MATLAB. 		 
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THPSC078 Controller of Power Supplies for Corrector Magnets of European XFEL 715
 
  • V.R. Kozak, O.V. Belikov
    BINP SB RAS, Novosibirsk, Russia
  
  The European XFEL is under construction now in Hamburg. It is a big international project. Budker Institute of Nuclear Physics (BINP) developed, produced and delivered power supplies for corrector magnets of XFEL. A controller for these power supplies was developed. It provides an 18 bits resolution of digital-to-analog converter and 6 channels of precise analog-to-digital converter with high accuracy and resolution. A combination of the general purpose functions with the specific function for power supplies allowed using the same controller for different equipment of corrector magnet subsystem. Here is described the controller, its properties and main applications.  
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THPSC079
 Realtime Presentation Broadcasting System for Diverse Information Exchange Between the U-70 Accelerator Complex Control Rooms  
 
  • I. Lobov, V. Gotman
    IHEP, Moscow Region, Russia
  
  A system for live presentation broadcasting has been developed on top of OGG streaming container utilization. The system was built on the base of media server for video and audio exchange between the U70 Accelerator Complex control rooms. A possibility has been added to media server allowing both the variety of clients connections and using of diverse broadcasting sources. The system kernel is represented by special program module that receives live streams from different broadcasting sources and transmits it to the number of connected clients. Any program module with ability of converting data to OGG container format could play the role of broadcasting source. The data for the broadcasting source could be taken from IP camera, computer screen or database table. The client program is a set of HTML5 pages that displays the information about available remote presentation, makes connection and displays the selected ones.  
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THPSC080 Data Processing Automatization for Gamma-Spectrometry Diagnostics of Neutron Accelerator BNCT 718
 
  • T.A. Bykov
    Budker INP & NSU, Novosibirsk, Russia
  • D.A. Kasatov
    BINP SB RAS, Novosibirsk, Russia
  
  Funding: The study was supported by the grants from the Russian Science Foundation (Project No.14-32-00006), Budker Nuclear Institute and Novosibirsk State University.
There is the accelerator-tandem at the Nuclear physics institute in Novosibirsk which is suitable for malignancies treatment such as glioblastoma and melanoma using BNCT methods. There are different gamma spectrometry diagnostics which apply under this project. One of these is used to determine the parameters of the neutron beam. The method is to irradiate a set of activation foils with neutrons. Then measure the gamma-spectrum of foils using gamma detector. Based on these data it can be calculated the activity of foil, as well as the amount and the energy of neutrons. For data processing of these diagnostics there was developed a software which is used for convenient display of gamma-spectrometer data and the activity of the foil. Software allows setting a canal calibration and the sensitivity calibration which is needed to calculate the foil activity. 		 
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THPSC081 VME Based Digitizers for Waveform Monitoring System of Linear Induction Accelerator LIA-20 721
 
  • E.S. Kotov, A.M. Batrakov, G.A. Fatkin, A.V. Pavlenko, K.S. Shtro, M.Yu. Vasilyev
    BINP SB RAS, Novosibirsk, Russia
  • G.A. Fatkin, E.S. Kotov, A.V. Pavlenko, M.Yu. Vasilyev
    NSU, Novosibirsk, Russia
  
  The Linear Induction Accelerator LIA-20 is being created at the Budker Institute of Nuclear Physics. Waveform monitoring system (WMS) is an important part of LIA-20 control system. WMS includes "slow" and "fast" monitoring subsystems. Three kinds of digitizers have been developed for WMS. "Slow" subsystem is based on ADCx32. This digitizer uses four 8 channel multiplexed SAR ADCs (8 us conversion cycle) with 12-bit resolution. Main feature of this module is program configurable channel sequencing, which allows to measure signals with different timing characteristics. Two types of digitizers are involved in "fast" subsystem. The first one, ADC4x250-4CH, is 4-channel 250 MSPS digitizer. The second one, ADC4x250-1CH, is single channel digitizer with sample rate of 1 GSPS. Resolution of both devices is 12 bit. "Fast" modules are based on the common hardware. This paper describes hardware and software architecture of these modules.  
poster icon Poster THPSC081 [1.072 MB]  
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THPSC082
 Control System of LUE-200 of IREN Facility - Status  
 
  • V.F. Minashkin, J. Boettcher, E.A. Golubkov, A.V. Kalmykov, A.S. Kayukov, V. Kobets, I.D. Ponomarev, V.G. Pyataev, A.P. Sumbaev, K.V. Udovichenko, V.N. Zamriy, I.S. Zhironkin
    JINR, Dubna, Moscow Region, Russia
  • V.N. Shvetsov
    JINR/FLNP, Moscow Region, Russia
  
  The control system of LUE-200 an intensive pulse source of resonant neutrons (IREN) is described. The architecture of a control system and equipment structure is shown. Control system construction bases on the maximum use of instrumentation and the software for industrial systems. The control system solves following problems: set and t control of parameters of the basic systems of the accelerator (modulators, the RF-systems, focusing elements, the synchronizer, vacuum system etc.) with display of these parameters; beam diagnostics (a beam current, a profile and a beam position, energy etc.); protection of elements of the accelerator at an exit of their parameters from a working range; creation of a database of operating regimes of the accelerator; monitoring radiation level and the organization of lockup.  
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THPSC083 System of Geodetic Measurements for LIA-20 724
 
  • A.G. Chupyra, E.A. Bekhtenev, G.V. Karpov
    BINP SB RAS, Novosibirsk, Russia
  • E.A. Bekhtenev
    NSU, Novosibirsk, Russia
  
  The system of geodetic measurements for accelerator LIA-20 is presented. The system consists of two subsystems. The first one is hydrostatic level system and the second one is system with the stretched wire. The system of geodetic measurements controls vertical and horizontal shifts of the accelerating structures, and also their inclinations in the longitudinal and cross directions.  
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THPSC084 The New Control for Magnet System of KSRS 727
 
  • E.V. Kaportsev, Y.V. Krylov
    RRC, Moscow, Russia
  • K. Moseev, N.I. Moseiko, A.G. Valentinov
    NRC, Moscow, Russia
  
  The running cycle of Kurchatov Synchrotron Radiation Source (KSRS) includes the injection of electrons with energy 80 MeV from the linear accelerator in the booster storage ring Siberia-1, the accumulation of a electron current up to 400 mA and, then, electron energy ramping up to 450 MeV with the subsequent extraction of electrons in the main ring, storage ring Siberia-2, and accumulation there up to 300 mA, and at last the energy ramping up to 2.5 GeV. Several years ago, a modernization of the current system of automated control systems (ACS) has started. This article presents one of the most important parts - the new control subsystem of the magnet system  
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THPSC085 Present Status of VEPP-5 Injection Complex Control System 730
 
  • F.A. Emanov, D.E. Berkaev, D. Bolkhovityanov, P.B. Cheblakov
    BINP SB RAS, Novosibirsk, Russia
  
  VEPP-5 injection complex is being put into operation as beam source of VEPP-2000 and VEPP-4 colliders at the end of 2016. Its control system is being upgraded in order to reliably work with beam users and increase its manageability computer infrastructure was reconsidered to provide high availability and flexibility through virtualization of control servers. The paper presents architecture and implementation of complex computer infrastructure. A control software set based on CXv4, EPICS and VCAS frameworks under operating system Linux deals with a set of CAN, CAMAC and Ethernet specialized hardware. The software and hardware architecture and implementation is described.  
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THPSC086 Development and Implementation of the Automation System of the Ion Source for BNCT 733
 
  • A.M. Koshkarev, A.S. Kuznetsov, A.L. Sanin, V.Ya. Savkin, S.Yu. Taskaev, P.V. Zubarev
    BINP SB RAS, Novosibirsk, Russia
  
  Funding: Ministry of Science of the Russian Federation, unique identifier of applied research RFMEFI60414X0066.
The new source of epithermal neutrons*, designed for boron neutron capture therapy (BNCT)** of cancer in oncology clinic, was proposed and developed in Budker Institute of Nuclear Physics. This method of treatment is effective against several currently incurable radioresistant tumors, such as brain glioblastoma and melanoma metastases. The neutron source includes a new type of accelerator: accelerator-tandem with vacuum insulation, lithium neutron generating target and neutron beam shaping assembly. Current accelerator produces a stationary 5 mA proton beam with 2 MeV energy, but this is not sufficient for therapy on humans. For conducting the experiment on humans it is necessary to create a new power rack for the ion source. The report summarizes results of the development and implementation of new power rack, with remote control and data collection systems, to reach 15 mA beam current. This system will increase the proton beam current and, as a result, the neutron yield, that is needed to heal people.
* S. Taskaev. Accelerator based epithermal neutron source. Physics of Particles and Nuclei, 2015, Vol. 46, No. 6, pp. 956'990.
** Neutron Capture Therapy. Principles and Applications. Eds: W. Sauerwein, A. Wittig, R. Moss, Y. Nakagawa. Springer, 2012. 		 
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THPSC087 Stabilization of the Equilibrium Position of a Magnetic Control System with Delay 736
 
  • A.Yu. Aleksandrov, A.P. Zhabko, I.A. Zhabko
    Saint Petersburg State University, Saint Petersburg, Russia
  • A.A. Kosov
    ISDCT SB RAS, Irkutsk, Russia
  
  Funding: The research was partially supported by the Saint Petersburg State University (project No. 9.37.157.2014), and by the Russian Foundation for Basic Research (grant Nos. 15-08-06680 and 16-01-00587-a).
Nonlinear oscillatory systems are widely applied for the modeling of charge particles motions in cyclotrons in neighborhoods of equilibrium orbits. They are also used for the analysis and synthesis of magnetic control devices. An actual problem for such systems is stabilization of their operating modes. In this report, analytical and numerical investigations of stability of the equilibrium position for a nonlinear oscillatory system are presented. The system can be treated as a mathematical model of magnetic suspension control system of a gyro rotor. A delay in the feedback control scheme and dissipative forces occurring due to energy losses at the interaction of the magnetic field with currents in the control loops are taken into account. Two approaches to the synthesis of stabilizing controls are proposed. The first one is based on the using of gyroscopic control forces. It is applicable in the case of essentially nonlinear homogeneous dissipative forces. The second approach is efficient for systems with linear dissipative forces. For this case, potential control forces are constructed. With the aid of a computer simulation of dynamics of closed-loop systems, a comparison of these approaches is fulfilled, and their features and conditions of applicability are determined. 		 
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THPSC088 Software and Computational Infrastructure of LIA-20 Control System 739
 
  • A.I. Senchenko, G.A. Fatkin, P.A. Selivanov, S.S. Serednyakov
    BINP SB RAS, Novosibirsk, Russia
  • G.A. Fatkin, A.I. Senchenko, S.S. Serednyakov
    NSU, Novosibirsk, Russia
  
  The linear induction accelerator LIA­20 for radiography is currently under construction at Budker Institute of Nuclear Physics. This paper presents software architecture and computational infrastructure for the accelerator controls. System and application software are described. Linux operating system is used on PC and embedded controllers. Application software is based on TANGO. Overall data transfer rate estimations are provided.  
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THPSC090 The Stochastic Characteristics Stability in the Problem of Observation and Estimate of the Charged Particles Movement 742
 
  • M.V. Chashnikov
    Saint Petersburg State University, Saint Petersburg, Russia
  
  The charged beam moving in the accelerator is modelled by particle-in-cell method. The control with delay in the connection canal is simulated by the after-effect. Thus, the model is described by system of the differential equations with delay. We observe and estimate changes of particles coordinates in the cross-section of the accelerator. It is supposed that initial conditions are the set with random error and we have chance of updating the solution in periodic timepoints with the same error. The dependence between the estimate dispersion and the measuring error dispersion is recieved.  
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