Siberian Snake for the Cooler Synchrotron Cosy
نویسندگان
چکیده
Siberian snakes avoid crossing depolarizing resonances in circular accelerators by forcing the spin tune to half integer independent of beam energy. This concept has been proposed by Ya.S. Derbenev and A.M. Kondratenko in 1974 [1]. If only one Siberian snake is used, the invariant spin axis1 is in the horizontal plane. This is an interesting feature to deliver longitudinally polarized beam to internal experiments. In this papers possibilities for spin preparation at the Cooler Synchrotron COSY are discussed.
منابع مشابه
Overcoming intrinsic and synchrotron depolarizing resonances with a Siberian snake.
We overcame the strong Gy = -3+vy intrinsic depolarizing resonance using a Siberian Snake acting on a stored beam of 177 MeV polarized protons at the Indiana University Cooler Ring. We also saw the first evidence for a synchrotron depolarizing resonance in a proton ring. Two synchrotron resonances were studied by varying the rf accelerating voltage and the imperfectio~i field at 104 MeV. The Si...
متن کاملSiberian Snake Experiments at the Iucf Cooler Ring
Recent polarized proton beam experiments in the IUCF Cooler Ring found an evidence for a second-order snake depolarizing resonance, when the vertical betatron tune was inadvertently set near a quarter-integer. We have also studied the possibility of spin-flipping the beam polarization in the presence of a full Siberian snake using an rf solenoid. By varying the rf solenoid’s ramp time and frequ...
متن کاملStatus of the Cooler Synchrotron Cosy Juelich
The Cooler Synchrotron COSY delivers proton and deuteron beams in the momentum range from 300 MeV/c to 3400 MeV/c. The different modes of operation – internal experiments with thin or thick targets, external target experiments with slow extraction or with very short extraction pulses – require different ion optical conditions. Polarisation experiments are of increasing interest in the COSY comm...
متن کاملThe Performance of Cosy
At the cooler synchrotron COSY the stochastic cooling system for both transverse and longitudinal cooling came into operation and was successfully applied to an internal target experiment. Further developments to accelerate polarized protons to the maximum momentum 3.3 GeV/c of COSY were carried out. Stacking with the electron cooler was applied to increase the injected proton intensity. In the...
متن کاملsubmitted to acta physica slovaca 1 – 6 WASA at COSY
The Wide Angle Shower Apparatus (WASA) has been transferred from the storage ring CELSIUS (TSL, Uppsala, Sweden) to the cooler synchrotron COSY (FZ Jülich, Germany). In this presentation, the status and planning of the WASAatCOSY project are reported. The main physics aspects are rare decays of η and η' mesons and isospin violation in deuteron-deuteron interactions.
متن کامل