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collider

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TUCHX03 Crab Waist Approach: from DAΦNE to SuperB luminosity, emittance, sextupole, factory 6
 
  • M. Zobov
    INFN/LNF, Frascati (Roma)
  The crab waist collision scheme (CW) was proposed and successfully tested at the Phi-factory DAΦNE. At present this scheme is considered to be most attractive for the next generation lepton factories. In particular, the novel scheme is a key element of the SuperB project, a new SuperB-factory with a luminosity about two orders of magnitude higher than that achieved at the present B-factories (KEKB and PEPII). In this paper we summarize the results achieved at DAΦNE after implementation of the CW collision scheme and discuss the status of the SuperB project.  
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TUCHA01 Accelerator Aspects of the Precision Mass Measurement Experiments at the VEPP-4M Collider with the KEDR Detector polarization, electron, resonance, positron 11
 
  • S. A. Nikitin
    BINP SB RAS, Novosibirsk
  One of most important constituents of the mass measurement experiments at colliders is a precision absolute beam energy calibration. Two methods for particle energy measurement are realized at the electron-positron collider VEPP-4M: one based on the resonant depolarization technique and another using the Back Compton Scattering. KEDR detector measurements of the J/Psi-, Psi' – mesons and the tau-lepton masses performed with the help of these methods is better in accuracy now in the world. Peculiarities of the beam energy calibraton as well as of the mass measurement experiments are represented in the viewpoint of requirements on beam parameters and accelerator systems.  
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TUCHB02 Project of the Nuclotron-based Ion Collider fAcility (NICA) at JINR ion, heavy-ion, booster, proton 14
 
  • A. O. Sidorin, N. N. Agapov, V. Aleksandrov, A. V. Butenko, E. D. Donets, A. V. Eliseev, V. V. Fimushkin, A. Govorov, V. Karpinsky, V. D. Kekelidze, H. G. Khodzhibagiyan, V. Kobets, S. A. Kostromin, A. D. Kovalenko, O. S. Kozlov, A. Kuznetsov, I. N. Meshkov, V. A. Mikhailov, V. Monchinsky, V. Shevtsov, A. N. Sissakian, A. V. Smirnov, A. Sorin, G. V. Trubnikov, V. Volkov, V. Zhabitsky
    JINR, Dubna, Moscow Region
  • O. I. Brovko
    JINR/VBLHEP, Moscow
  • T. Katayama
    GSI, Darmstadt
  The Nuclotron-based Ion Collider fAcility (NICA) is the new accelerator complex being constructed at JINR aimed to provide collider experiments with heavy ions up to uranium at the center of mass energy from 4 to 11 GeV/u. It includes 6 Mev/u linac, 600 MeV/u booster, upgraded SC synchrotron Nuclotron and collider consisting of two SC rings, which provide average luminosity of the level of 1027cm-2s-1.  
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TUCHB03 Optics Design for NICA Collider optics, lattice, proton, emittance 17
 
  • S. A. Kostromin, O. S. Kozlov, I. N. Meshkov, V. A. Mikhaylov, A. O. Sidorin
    JINR, Dubna, Moscow Region
  • A. Bolshakov, P. Zenkevich
    ITEP, Moscow
  • V. A. Lebedev, S. Nagaitsev
    Fermilab, Batavia
  • Y. Senichev
    FZJ, Jülich
  The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR collider experiments with ions at maximum energy (center of mass) SNN(1/2) ~ 11GeV/u. Collider ring has to provide ion-ion and ion-proton collisions in energy range 1-4.5 GeV/u and collisions of polarized proton-proton and deuteron-deuteron beams. Collider conceptions with constant gammatr and with possibility of its variation are considered. In the ring with changeable gammatr the optics design should allow to work with gammatr ~40 for protons mode as well as with γtr in range 3-11 for ions mode. The NICA has the racetrack shape (circumference ~450m) with two arcs and two straight sections which optimized to have betta*~35cm in two IPs. Duality of optics adjustable for different energy and different particles puts the special requirements on the arc and straight sections. Suppressing of rather high normalized chromaticity with changeable tune compels us to use the multi-family sextupole scheme. Three variants of the ring optics (based on FODO-cells, ODFDO-cells) were tested to provide acceptable IBS-time. Final version of the lattice is under discussion.  
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TUCHY01 Muon Collider Design Status emittance, proton, acceleration, target 20
 
  • Y. Alexahin
    Fermilab, Batavia
  Muon Collider (MC) - proposed by G. I. Budker and A. N. Skrinsky almost half a century ago - is now considered as the most exciting option for the energy frontier machine in the post-LHC era. A national Muon Accelerator Program (MAP) is being formed in the USA with the ultimate goal of building a MC at the Fermilab site with c.o.m. energy in the range 1.5-3 TeV and luminosity of ~1-5*1034 cm-2s-1. As the first step on the way to MC it envisages construction of a Neutrino Factory (NF) for high-precision neutrino experiments. The baseline scheme of the NF-MC complex is presented and possible options for its main components are discussed.  
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TUPSA001 Compensation of Nonlinearities in NICA Collider Optics sextupole, proton, lattice, dynamic-aperture 35
 
  • S. A. Kostromin, O. S. Kozlov, I. N. Meshkov, V. A. Mikhailov, A. O. Sidorin, G. V. Trubnikov
    JINR, Dubna, Moscow Region
  • V. A. Lebedev
    Fermilab, Batavia
  • Y. Senichev
    FZJ, Jülich
  Intra-beam scattering is the limiting factor of the luminosity lifetime for Nuclotron-based Ion Collider fAcility (NICA). To minimize IBS growth the dispersion should be lowered as much as possible. Due to this fact and rather long dispersionless straight sections with two IPs the normalized chromaticity reaches a high value ~4. Therefore the strong chromatic sextupoles magnets on arcs are required which in turn bring significant non-linear distortions in beam dynamics. Different schemes involving several families of sextupoles and are tested. Optimization of the chromaticity correction scheme was carried out to increase the dynamic aperture. Use of octupole correctors was studied to compensate the nonlinearities from sextupole magnets and minimize the non-linear tune shift in region of beam. Obtained design of the NICA collider lattice was used for the long term tracking to understand the beam transverse parameters behavior.  
 
TUPSA004 Superconducting Magnets for the NICA Accelerator Complex in Dubna dipole, booster, quadrupole, synchrotron 41
 
  • E. V. Muravieva, H. G. Khodzhibagiyan, V. A. Mikhailov
    JINR, Dubna, Moscow Region
  The Nuclotron-based Ion Collider Facility (NICA) is the new accelerator complex being constructed at JINR aimed to provide collider experiments with heave ions and polarized deuterons. It includes new linac, Booster, upgraded superconducting (SC) synchrotron Nuclotron and Collider consisting of two storage rings. The NICA Booster dipole and quadrupole magnets are based on the Nuclotron type magnet with "cold" iron yoke and winding of hollow superconductor. This paper presents the basic characteristics, describes the design and status of manufacturing of the NICA Booster dipole and quadrupole full size model magnets.  
 
TUPSA016 Stochastic Cooling System Prototype for Nuclotron pick-up, kicker, ion, vacuum 74
 
  • A. O. Sidorin
    JINR, Dubna, Moscow Region
  Joint Institute for Nuclear Research (JINR) initiated the creation of a new and unique heavy-ion collider – Nuclotron-based Ion Collider Facility (NICA). By estimations the luminosity will mainly be limited by the intra-beam scattering effect. To suppress one, it was proposed to use the beam cooling. In the coming years it’s planned to construct stochastic cooling system prototype at operating accelerator Nuclotron to test different working modes. An analyze of existing methods of stochastic cooling is given in the report. The first results of simulations and different elements of the system prototype for Nuclotron, as well as plans for its realization at JINR are presented.  
 
TUPSA029 Pickup Beam Measurement System at the VEPP-2000 Collider injection, betatron, controls, pick-up 101
 
  • Yu. A. Rogovsky, E. A. Bekhtenev
    BINP SB RAS, Novosibirsk
  This paper reviews the present state of electromagnetic beam position monitors (pickups) at VEPP-2000 collider. It includes descriptions of position monitors, typical interfaces for these monitors and their system characteristics (resolution, stability, bandwidth and problems or limitations) are discussed. The paper also reviews several types of diagnostic measurements using beam position monitors which are useful in improving accelerator operations.  
 
TUPSA030 Beam Measurements With Visible Synchrotron Light on VEPP-2000 Collider controls, diagnostics, vacuum, electron 104
 
  • Yu. A. Rogovsky, D. E. Berkaev, A. N. Kyrpotin, I. Nesterenko, A. L. Romanov
    BINP SB RAS, Novosibirsk
  This paper describes beam diagnostics at VEPP-2000 collider, based on visible synchrotron light analysis. These beam instruments include: SR beamline and optics; acquisition tools and high resolution CCD cameras distributed around the storage ring to measure the transverse beam profile and its position in vacuum chamber; photomultiplier tubes (PMT) which enables beam current measurements; video system. Some applications of these measurement systems and their measurement results are presented.  
 
TUPSA039 HV Electron Cooler for the NICA Collider electron, acceleration, gun, cathode 125
 
  • I. N. Meshkov, E. V. Ahmanova, A. G. Kobets, R. Pivin, A. Yu. Rudakov, A. V. Smirnov, N. D. Topilin, Yu. A. Tumanova, S. Yakovenko
    JINR, Dubna, Moscow Region
  • A. A. Filippov
    Allrussian Electrotechnical Institute, Moskow
  • A. V. Philippov, A. V. Shabunov
    JINR/VBLHEP, Dubna, Moscow region
  The goal of the cooling system of the NICA collider is to meet the required parameters of ion beams in energy range of 1 - 4.5GeV/u that corresponds to the 0.5 - 2.5 MeV of the electron energy. The electron cooler project is developed according to the world experience of similar systems consruction. The main peculiarity of the electron cooler for the NICA collider is use of two cooling electron beams (one electron beam per each ring of the collider) that never has been done before. The acceleration and deceleration of the electron beams is produced by common high-voltage generator. The cooler consists of three tanks. Two of them contain acceleration/deceleration tubes and are immersed in superconducting solenoids. The third one contains HV generator. The scheme of the electron cooler, its main parameters and operation regime are presented.  
 
WEPSB031 Transverse Bunch-by-bunch Digital Feedback for the VEPP-4M Collider feedback, betatron, kicker, controls 236
 
  • D. P. Sukhanov, V. P. Cherepanov, V. V. Oreshonok, V. V. Smaluk
    BINP SB RAS, Novosibirsk
  The coupled-bunch instability is the base reason of the operating current limitation and even an beam loss at the VEPP-4M electron-positron collider. For suppression any excited transverse mode of oscillation of the accumulated beam, the transverse bunch-by-bunch digital feedback has been installed. The paper reports on the current design and status of the feedback system. The available diagnostic tools and latest operational results and beam measurements is given.  
 
WEPSB034 Wideband BPM Electronics for the VEPP-4M Collider electron, positron, storage-ring, pick-up 245
 
  • E. A. Bekhtenev, G. V. Karpov
    BINP SB RAS, Novosibirsk
  New beam position monitor (BPM) FPGA-based electronics has been developed and tested at the VEPP-4M electron-positron collider. The VEPP-4M operates with two electron and two positron bunches. Compared to the old BPM electronics the new one can measure the position of each of four bunches with any BPM of storage ring including the BPMs near interaction point. Wide bandwidth of electronics (200 MHz) allows the separate measurements of electron and positron bunches with time interval between bunches up to 20 ns. BPM system works at two modes: slow closed orbit measurements and turn-by-turn measurements. We present details of system design and operation