Keyword: damping
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WEXMH01 Feeding BINP Colliders with the New VEPP-5 Injection Complex injection, positron, electron, linac 56
 
  • F.A. Emanov, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, O.V. Belikov, D.E. Berkaev, M.F. Blinov, Y.M. Boimelshtain, D. Bolkhovityanov, A.G. Chupyra, N.S. Dikansky, A.R. Frolov, Ye.A. Gusev, G.V. Karpov, A.S. Kasaev, V.I. Kokoulin, A.A. Kondakov, I. Koop, I.V. Kuptsov, G.Y. Kurkin, R.M. Lapik, N.N. Lebedev, A.E. Levichev, P.V. Logatchov, Yu. Maltseva, P.V. Martyshkin, A.A. Murasev, D.A. Nikiforov, A.V. Pavlenko, V.M. Pavlov, A.V. Petrenko, V. Podlevskih, V.V. Rashchenko, S.L. Samoylov, S.V. Shiyankov, A.N. Skrinsky, A.A. Starostenko, D.P. Sukhanov, A.G. Tribendis, A.S. Tsyganov, S.V. Vasiliev, V.D. Yudin, I.M. Zemlyansky
    BINP SB RAS, Novosibirsk, Russia
  • Yu. A. Rogovsky
    Budker INP & NSU, Novosibirsk, Russia
  • A.L. Romanov
    Fermilab, Batavia, Illinois, USA
 
  VEPP-4 and VEPP-2000 e+e colliders are switching to feed from VEPP-5 Injection Complex via newly constructed K-500 beam transfer line. Since first operation of K-500 at the end of 2015 injection complex delivered e+ and e- beams to VEPP-2000 facility and is getting ready to work with VEPP-4. Upgraded injection chain demonstrated ability to provide design luminosity toVEPP-2000 and techniques of reliable operation are now under development. The designand operation experience of Injection Complex and transfer lines will be presented.  
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TUPSA024 On Stabilization of Systems of Linear Equations with Linear Increasing Time Delay by Observation controls, feedback, synchrotron, acceleration 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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THPSC052 The Longitudinal Broadband Impedance and Energy Spread Measurements at VEPP-4M impedance, synchrotron, scattering, electron 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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THPSC057 Application of Model Independent Techniques at VEPP-2000 and SIS100 betatron, collider, electron, experiment 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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THPSC074 Longitudinal Beam Distribution Measurements in Damping Ring of VEPP-5 Injection Complex injection, impedance, electron, operation 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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