IPAC2012 - List of Authors (Maier, R.)

Paper	Title	Page
MOPPD009	Stochastic Cooling Developments for HESR at FAIR	388
	H. Stockhorst, R. Maier, D. Prasuhn, R. Stassen FZJ, Jülich, Germany C. Dimopoulou, A. Dolinskii, T. Katayama, Yu.A. Litvinov, M. Steck, T. Stöhlker GSI, Darmstadt, Germany
	The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. The HESR is planned to dedicate to the field of high-energy antiproton physics to explore the research areas of charmonium spectroscopy, hadronic structure, and quark-gluon dynamics with high-quality beams over a broad momentum range from 1.5 to 15 GeV/c. The new facility provides the combination of powerful phase-space cooled antiproton beams and internal Pellet and gas jet targets to achieve the requirements of the experiment PANDA in terms of beam quality and luminosity. Detailed theoretical analyses have been carried out to design the stochastic cooling system for accumulation and stochastic cooling of antiprotons with target operation. Recently it is proposed to utilize the HESR also for the atomic and nuclear physics with highly charged heavy ions such as 132Sn⁵⁰⁺ in the dedicated experiments at high energies 0.74-3 GeV/u. In this contribution the feasibility of stochastic cooling of heavy ions with internal targets is in detail investigated under the constraint of the cooling system hardware as foreseen for anti-proton cooling.

TUPPC070	Alternating Spin Aberration Electrostatic Lattice for EDM Ring	1332
	Y. Senichev, R. Maier, D. Zyuzin FZJ, Jülich, Germany M. Berz MSU, East Lansing, Michigan, USA
	The idea of the electric dipole moment search using the storage ring (SrEDM) with polarized beam is realized under condition of the long-time spin coherency of all particles, the time during which the RMS spread of the spin orientation of all particles in the bunch reaches one radian. Following the requirements of the planned EDM experiment, the SCT should be more than 1000 seconds. During this time each particle performs about 10⁹ turns in the storage ring moving on different trajectories through the optics elements. At such conditions the spin-rotation aberrations associated with various types of space and time dependent nonlinearities start to play a crucial role. In this paper we consider a new method based on the alternating spin drift, causing it to rotate alternately, thereby limiting the growth of aberrations at one order of magnitude lower. As a result, using this method we can achieve the SCT of the order of 5000-6000 seconds. The difficulties of these studies are still in the fact that the aberrations growth observed in the scale of a 10⁹ turns. For the study we use an analytical method in composition with a numerical simulation by COSY Infinity.

TUPPC071	Comparison of Different Numerical Modelling Methods for Beam Dynamics in Electrostatic Rings	1335
	D. Zyuzin, R. Maier, Y. Senichev FZJ, Jülich, Germany S.N. Andrianov, A.N. Ivanov St. Petersburg State University, St. Petersburg, Russia M. Berz MSU, East Lansing, Michigan, USA
	To search the electric dipole moment was proposed to use polarized protons at the so-called "magic" momentum of 0.7 GeV/c in an electric storage ring. For studying beam dynamics in electrostatic rings different computational methods can be used. We used differential algebra methods realized in COSY Infinity and integrating program with symplectic Runge-Kutta methods. These methods were observed and compared for orbital and spin motion.

THPPP002	Operation of the HESR Storage Ring of the FAIR Project with Ions and Rare Isotopes	3722
	M. Steck, C. Dimopoulou, A. Dolinskii, T. Katayama, Yu.A. Litvinov, T. Stöhlker GSI, Darmstadt, Germany R. Maier, D. Prasuhn, H. Stockhorst FZJ, Jülich, Germany
	The HESR storage ring of the FAIR project is designed for experiments with cooled antiprotons. The HESR receives pre-cooled antiprotons from the Collector Ring CR which is also designed for cooling of rare isotope beams. The magnetic rigidity of 13 Tm is the same for the pre-cooling of antiprotons and rare isotopes in the CR. Therefore the transfer of ions or rare isotopes from the CR to the HESR can be performed under similar condition, except the different polarity of the magnetic components. This is an option for the first stage of the FAIR project when no other storage ring is available for experiments with stored ions. In the HESR the ions can be decelerated or accelerated, like the antiprotons, to energies corresponding to the magnetic rigidity range from 5 to 50 Tm. The planned beam cooling systems of the HESR, stochastic and electron cooling, can be applied to improve the quality of the ion beams in the HESR and support experiments using an internal target or the accumulation of rare isotope beams in the HESR. Scenarios for operating the HESR with ions and rare isotopes as well as achievable performance, beam intensity and quality for internal experiments will be discussed.

Paper

Title

Page

Stochastic Cooling Developments for HESR at FAIR

388

H. Stockhorst, R. Maier, D. Prasuhn, R. Stassen
FZJ, Jülich, Germany
C. Dimopoulou, A. Dolinskii, T. Katayama, Yu.A. Litvinov, M. Steck, T. Stöhlker
GSI, Darmstadt, Germany

The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. The HESR is planned to dedicate to the field of high-energy antiproton physics to explore the research areas of charmonium spectroscopy, hadronic structure, and quark-gluon dynamics with high-quality beams over a broad momentum range from 1.5 to 15 GeV/c. The new facility provides the combination of powerful phase-space cooled antiproton beams and internal Pellet and gas jet targets to achieve the requirements of the experiment PANDA in terms of beam quality and luminosity. Detailed theoretical analyses have been carried out to design the stochastic cooling system for accumulation and stochastic cooling of antiprotons with target operation. Recently it is proposed to utilize the HESR also for the atomic and nuclear physics with highly charged heavy ions such as 132Sn⁵⁰⁺ in the dedicated experiments at high energies 0.74-3 GeV/u. In this contribution the feasibility of stochastic cooling of heavy ions with internal targets is in detail investigated under the constraint of the cooling system hardware as foreseen for anti-proton cooling.

TUPPC070

Alternating Spin Aberration Electrostatic Lattice for EDM Ring

1332

Y. Senichev, R. Maier, D. Zyuzin
FZJ, Jülich, Germany
M. Berz
MSU, East Lansing, Michigan, USA

The idea of the electric dipole moment search using the storage ring (SrEDM) with polarized beam is realized under condition of the long-time spin coherency of all particles, the time during which the RMS spread of the spin orientation of all particles in the bunch reaches one radian. Following the requirements of the planned EDM experiment, the SCT should be more than 1000 seconds. During this time each particle performs about 10⁹ turns in the storage ring moving on different trajectories through the optics elements. At such conditions the spin-rotation aberrations associated with various types of space and time dependent nonlinearities start to play a crucial role. In this paper we consider a new method based on the alternating spin drift, causing it to rotate alternately, thereby limiting the growth of aberrations at one order of magnitude lower. As a result, using this method we can achieve the SCT of the order of 5000-6000 seconds. The difficulties of these studies are still in the fact that the aberrations growth observed in the scale of a 10⁹ turns. For the study we use an analytical method in composition with a numerical simulation by COSY Infinity.

TUPPC071

Comparison of Different Numerical Modelling Methods for Beam Dynamics in Electrostatic Rings

1335

D. Zyuzin, R. Maier, Y. Senichev
FZJ, Jülich, Germany
S.N. Andrianov, A.N. Ivanov
St. Petersburg State University, St. Petersburg, Russia
M. Berz
MSU, East Lansing, Michigan, USA

To search the electric dipole moment was proposed to use polarized protons at the so-called "magic" momentum of 0.7 GeV/c in an electric storage ring. For studying beam dynamics in electrostatic rings different computational methods can be used. We used differential algebra methods realized in COSY Infinity and integrating program with symplectic Runge-Kutta methods. These methods were observed and compared for orbital and spin motion.

THPPP002

Operation of the HESR Storage Ring of the FAIR Project with Ions and Rare Isotopes

3722

M. Steck, C. Dimopoulou, A. Dolinskii, T. Katayama, Yu.A. Litvinov, T. Stöhlker
GSI, Darmstadt, Germany
R. Maier, D. Prasuhn, H. Stockhorst
FZJ, Jülich, Germany

The HESR storage ring of the FAIR project is designed for experiments with cooled antiprotons. The HESR receives pre-cooled antiprotons from the Collector Ring CR which is also designed for cooling of rare isotope beams. The magnetic rigidity of 13 Tm is the same for the pre-cooling of antiprotons and rare isotopes in the CR. Therefore the transfer of ions or rare isotopes from the CR to the HESR can be performed under similar condition, except the different polarity of the magnetic components. This is an option for the first stage of the FAIR project when no other storage ring is available for experiments with stored ions. In the HESR the ions can be decelerated or accelerated, like the antiprotons, to energies corresponding to the magnetic rigidity range from 5 to 50 Tm. The planned beam cooling systems of the HESR, stochastic and electron cooling, can be applied to improve the quality of the ion beams in the HESR and support experiments using an internal target or the accumulation of rare isotope beams in the HESR. Scenarios for operating the HESR with ions and rare isotopes as well as achievable performance, beam intensity and quality for internal experiments will be discussed.