A. Kulikov
A5005257125- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Engineering Technology and Methodologies
- Advanced NMR Techniques and Applications
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Material Properties and Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Polymer Science and Applications
- Particle accelerators and beam dynamics
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Quantum, superfluid, helium dynamics
- Neutrino Physics Research
- Injection Molding Process and Properties
- Advanced Chemical Physics Studies
- Manufacturing Process and Optimization
- Muon and positron interactions and applications
- Advanced machining processes and optimization
- Scientific Research and Discoveries
- Electron Spin Resonance Studies
- Electric and Hybrid Vehicle Technologies
- Mechanical Engineering and Vibrations Research
Joint Institute for Nuclear Research
2012-2023
Stanford Synchrotron Radiation Lightsource
2002
SLAC National Accelerator Laboratory
2002
A new method to determine the spin tune is described and tested. In an ideal planar magnetic ring, tune-defined as number of precessions per turn-is given by ν(s)=γG (γ Lorentz factor, G gyromagnetic anomaly). At 970 MeV/c, deuteron spins coherently precess at a frequency ≈120 kHz in Cooler Synchrotron COSY. The deduced from up-down asymmetry deuteron-carbon scattering. time interval 2.6 s, was determined with precision order 10^{-8}, 1×10^{-10} for continuous 100 s accelerator cycle. This...
We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of magnetic storage ring (COSY). This long spin coherence time is maintained through combination bunching, electron cooling, sextupole field corrections, and suppression collective effects current limits. record required for search an intrinsic electric dipole moment on at statistical sensitivity level approaching 10^{-29} e cm.
This Letter reports the successful use of feedback from a spin polarization measurement to revolution frequency $0.97\text{ }\text{ }\mathrm{GeV}/c$ bunched and polarized deuteron beam in Cooler Synchrotron (COSY) storage ring order control both precession rate ($\ensuremath{\approx}121\text{ }\mathrm{kHz}$) phase horizontal component. Real time synchronization with radio (rf) solenoid made possible rotation out plane, yielding demonstration method manipulate polarization. In particular,...
The stable spin direction of polarized particles in a storage ring was determined first experimentally, through an accurate measurement the tune and its response to longitudinal magnetic fields.
The deuteron tensor analysing power T20 of the d→p→He3η reaction has been measured at COSY-ANKE facility in small steps excess energy Q up to Q=11 MeV. Despite square production amplitude varying by over a factor five through this range, shows little dependence. This is evidence that final state interaction causing variation not influenced spin configuration entrance channel. weak angular dependence observed for provides useful insight into structure near threshold.
We report on measurements of the differential cross section $d\ensuremath{\sigma}/d\mathrm{\ensuremath{\Omega}}$ and first measurement analyzing power ${A}_{y}$ in $\mathrm{\ensuremath{\Delta}}(1232)$ excitation energy region reaction $pp\ensuremath{\rightarrow}{{pp}}_{s}{\ensuremath{\pi}}^{0}$ where ${{pp}}_{s}$ is a $^{1}S_{0}$ proton pair. The experiment has been performed with ANKE spectrometer at COSY-J\"ulich. data reveal peak dependence forward section, minimum zero degrees its...
The vector and tensor polarizations of a deuteron beam have been measured using elastic deuteron-carbon scattering at 75.6 MeV deuteron-proton 270 MeV. After acceleration to 1170 inside the COSY ring, deuterons were checked by studying variety nuclear reactions cluster target ANKE magnet spectrometer placed an internal position storage ring. All these measurements consistent with absence depolarization during provide number secondary standards that can be used in subsequent experiments facility.
The unpolarised differential cross section and the two deuteron tensor analysing powers A xx yy of $$\vec dp \to \{ pp\} _s n$$ charge-exchange reaction have been measured with ANKE spectrometer at COSY storage ring. Using beams energies 1.2, 1.6, 1.8, 2.27GeV, data were obtained for small momentum transfers to a {pp} s system low excitation energy. results three lower are consistent impulse approximation predictions based upon current knowledge neutron-proton amplitudes. However, where...
A study of the deuteron breakup reaction $pd \to (pp)n$ with forward emission a fast proton pair small excitation energy $E_{pp}<$ 3 MeV has been performed at ANKE spectrometer COSY--J\"ulich. An exclusive measurement was carried out six proton--beam energies $T_p=$~0.6,~0.7,~0.8,~0.95,~1.35, and 1.9 GeV by reconstructing momenta two protons. The differential cross section reaction, averaged up to $8^{\circ}$ over cm polar angle total momentum $pp$ pairs, obtained. Since kinematics this...
The pp -> pi0 differential cross section has been measured with the ANKE spectrometer at COSY-Juelich for pion cms angles between 0 and 15.4 degrees a proton beam energy of 0.8 GeV. selection diproton pairs an excitation E_{pp} < 3 MeV ensures that final system is dominantly in spin-singlet 1S0 state. kinematics are therefore very similar to those d pi+ but different spin isospin transitions. results will thus provide crucial extra test production models nucleon-nucleon collisions....
The cross section for inclusive multipion production in the $pp\ensuremath{\rightarrow}ppX$ reaction was measured at COSY-ANKE four beam energies, 0.8, 1.1, 1.4, and 2.0 GeV, low excitation energy final $pp$ system, such that diproton quasiparticle is $^{1}S_{0}$ state. At three higher missing-mass ${M}_{X}$ spectra show a strong enhancement ${M}_{X}$, corresponding to an Abashian-Booth-Crowe effect moves steadily larger values as increased. Despite structure looking very different 0.8...
The pp -> {pp}_s pi0 differential cross section has been measured with the ANKE spectrometer at COSY-Juelich for seven proton beam energies T_p between 0.5 and 1.97 GeV. By selecting pairs an excitation energy of less than 3 MeV it is ensured that final system in 1S0 state. In region theta_{pp}^{cm} < 18 deg, data reveal a forward dip =< 1.4 GeV whereas peaking seen dependence shows broad peak 0.6-0.8 region, probably associated Delta(1232) excitation, minimum Some these features...
The proton analysing power in $\vec{p}p$ elastic scattering has been measured at small angles COSY-ANKE 796 MeV and five other beam energies between 1.6 2.4 GeV using a polarised beam. asymmetries obtained by detecting the fast ANKE forward detector or slow recoil silicon tracking telescope are completely consistent. Although results agree well with many published data MeV, also most recent partial wave solution this energy, higher lie above predictions of angles. An updated phase shift...
In order to establish links between p-wave pion production in nucleon-nucleon collisions and low energy three-nucleon scattering, an extensive programme of experiments on is currently underway at COSY-ANKE. The final proton pair detected very excitation energy, leading S-wave diproton, denoted here as {pp}_s. We now report measurements the differential cross section analysing power pol{p}p->{pp}_s pi^0$ reaction 353 MeV. Both observables can be described terms s- d-wave and, by using phase...
A low-energy spin-physics program is being developed at the COSY storage ring. To support planned experimental activities, several tools for polarized beams and targets have been developed. The paper presents physics case readiness of setup its realization.
The fundamental reaction $pp\ensuremath{\rightarrow}{pp{}}_{s}\ensuremath{\gamma}$, where ${pp{}}_{s}$ is a proton pair with low excitation energy, has been observed the ANKE spectrometer at COSY-J\"ulich for beam energies of ${T}_{p}=0.353$, 0.500, and 0.550 GeV. This equivalent to photodisintegration free $^{1}S_{0}$ diproton photon ${E}_{\ensuremath{\gamma}}\ensuremath{\approx}{T}_{p}/2$. differential cross sections measured c.m. angles...
The deuteron breakup reaction $\mathit{pd}\ensuremath{\rightarrow}{\mathit{pp}}{}_{s}n$, where ${\mathit{pp}}{}_{s}$ is a fast proton pair emitted in forward direction with small excitation energy ${E}_{\mathit{pp}}<3$ MeV, has been studied at beam energies of $0.5--2.0$ GeV using the ANKE spectrometer COSY-J\"ulich. differential c.m. cross sections are measured complete kinematics and provide angular distributions neutron emission angle range...