Download or read book Use of an Electron Beam for Stochastic Cooling written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave instability of an electron beam can be used for a multiple increase in the collective response for the perturbation caused by a particle of a co-moving ion beam, i.e. for enhancement of friction force in electron cooling method. The low scale (hundreds GHz and higher frequency range) space charge or FEL type instabilities can be produced (depending on conditions) by introducing an alternating magnetic fields along the electron beam path. Beams' optics and noise conditioning for obtaining a maximal cooling effect and related limitations will be discussed. The method promises to increase by a few orders of magnitude the cooling rate for heavy particle beams with a large emittance for a wide energy range with respect to either electron and conventional stochastic cooling.

Download or read book Optical Stochastic Cooling and Electron Beam Modulation in Electron Cooling written by Yunkai Zhang and published by . This book was released on 2003 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ion Beam Cooling Toward The Crystalline Beam Proceedings Of The Workshop written by Akira Noda and published by World Scientific. This book was released on 2002-12-20 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with recent topics in the field of ion beam cooling. Indications of one-dimensional ordering observed by electron beam cooling of highly charged heavy ion beams, and crystal beams observed by laser cooling at the RFQ storage ring, are presented together with theoretical and computational investigations on these phenomena. The approach to hot ion beam cooling is also discussed, from the viewpoint of application of the beam cooling technique.

Download or read book Proceedings of the Workshop on Ion Beam Cooling written by Akira Noda and published by World Scientific. This book was released on 2002 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with recent topics in the field of ion beam cooling. Indications of one-dimensional ordering observed by electron beam cooling of highly charged heavy ion beams, and crystal beams observed by laser cooling at the RFQ storage ring, are presented together with theoretical and computational investigations on these phenomena. The approach to hot ion beam cooling is also discussed, from the viewpoint of application of the beam cooling technique.

Download or read book Stochastic Cooling of Particle Beams written by Dieter Möhl and published by Springer. This book was released on 2013-01-08 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lecture note describes the main analytical approaches to stochastic cooling. The first is the time domain picture, in which the beam is rapidly sampled and a statistical analysis is used to describe the cooling behaviour. The second is the frequency domain picture, which is particularly useful since the observations made on the beam are mainly in this domain. This second picture is developed in detail to assess key components of modern cooling theory like mixing and signal shielding and to illustrate some of the diagnostic methods. Finally the use of a distribution function and the Fokker-Plank equation, which offer the most complete description of the beam during the cooling, are discussed.

Download or read book FREE ELECTRON LASERS AND HIGH ENERGY ELECTRON COOLING written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooling intense high-energy hadron beams remains a major challenge in modern accelerator physics. Synchrotron radiation of such beams is too feeble to provide significant cooling: even in the Large Hadron Collider (LHC) with 7 TeV protons, the longitudinal damping time is about thirteen hours. Decrements of traditional electron cooling decrease rapidly as the high power of beam energy, and an effective electron cooling of protons or antiprotons at energies above 100 GeV seems unlikely. Traditional stochastic cooling still cannot catch up with the challenge of cooling high-intensity bunched proton beams--to be effective, its bandwidth must be increased by about two orders-of-magnitude. Two techniques offering the potential to cool high-energy hadron beams are optical stochastic cooling (OSC) and coherent electron cooling (CEC)--the latter is the focus of this paper. In the early 1980s, CEC was suggested as a possibility for using various instabilities in an electron beam to enhance its interaction with hadrons (i.e., cooling them). The capabilities of present-day accelerator technology, Energy Recovery Linacs (ERLs), and high-gain Free-Electron Lasers (FELs), finally caught up with the idea and provided the all necessary ingredients for realizing such a process. In this paper, we discuss the principles, and the main limitations of the CEC process based on a high-gain FEL driven by an ERL. We also present, and summarize in Table 1, some numerical examples of CEC for ions and protons in RHIC and the LHC.

Download or read book Optimization of Electron Cooling in the Recycler written by and published by . This book was released on 2009 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antiprotons in Fermilab's Recycler ring are cooled by a 4.3 MeV, 0.1A DC electron beam (as well as by a stochastic cooling system). The paper describes electron cooling improvements recently implemented: adjustments of electron beam line quadrupoles to decrease the electron angles in the cooling section and better stabilization and control of the electron energy.

Download or read book Electron Cooling And New Cooling Techniques Ecool 90 Proceedings Of The Workshop written by L Tecchio and published by World Scientific. This book was released on 1991-05-24 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: ICM 2010 proceedings comprises a four-volume set containing articles based on plenary lectures and invited section lectures, the Abel and Noether lectures, as well as contributions based on lectures delivered by the recipients of the Fields Medal, the Nevanlinna, and Chern Prizes. The first volume will also contain the speeches at the opening and closing ceremonies and other highlights of the Congress.

Download or read book Beam Cooling and Related Topics written by Sergei Nagaitsev and published by American Institute of Physics. This book was released on 2006-04-06 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galena, Illinois, 18-23 September 2005

Download or read book Workshop on Phase Space Cooling written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-day workshop was held on August 5 and 6, 1976, to discuss phase space damping (''cooling'') of particle beams. Two cooling techniques have been developed: in stochastic cooling the spread of amplitudes in a beam is reduced by a feedback signal derived from the statistical fluctuations in the beam; in electron cooling an electron beam having the same mean velocity as the heavy particle (proton or antiproton) beam coincides with the heavy beam in part of the orbit. Viewed in the center-of-mass system, the electrons are ''cold'' and the protons ''hot'', and in the approach to thermal equilibrium the protons are cooled down; in the lab system this means their fluctuations from the mean are reduced. Both these cooling techniques are discussed, especially with a view to their application to the production of intense high-quality antiproton beams suitable for colliding beam physics.

Download or read book Cooler Rings And Their Applications Proceedings Of The 19th Ins Symposium written by T Katayama and published by World Scientific. This book was released on 1991-08-29 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:Status Report:The IUCF Cooler after Three Years (R E Pollock)The Heidelberg Heavy Ion Cooler Ring TSR (E Jaeschke)Storage and Cooling of Heavy Ions in the ESR up to 200 MeV/u (H Eickhoff et al)Present Status of CELSIUS (A Johansson & D Reistad); Cooler Synchrotron TARN II, Present and Future (T Katayama)Beam Cooling: Electron Cooling at TARN II (T Tanabe et al)Ion Trap: Penning Trap Experiments at the University of Washington and at NIST in Boulder (F L Moore) Electron Cooling and Trapped Antiprotons (H Kalinowsky)Nuclear and Particle Physics: High-Resolution Spectroscopy of Deeply-Bound Pionic Atoms in Heavy Nuclei by Pion-Transfer Reactions of Inverse Kinematics Using the GSI Cooler Ring ESR (T Yamazaki)Nuclear Physics with the Indiana Cooler (H O Meyer)The Anomalous Magnetic Moment of the Muon (V W Hughes)Particle Physics at CELSIUS (S Kullander et al)Accelerator: Advanced Stacking Methods Using Electron Cooling at the TSR Heidelberg (M Grieser et al)Accumulation of Radioactive Beam and Collision with Electron Beam in TARN II (A Ando & T Katayama)Internal Target: Internal Targets at the CELSIUS Storage Ring (C Ekström)A Thin Foil as an Internal Target for a Cooler Ring Experiment (K Noda et al)Atomic Physics: Radiative and Dielectronic Recombination: Measurements at UNILAC and ESR (A Müller et al)Electron-Ion Recombination Measurements with an Electron Cooler (L H Andersen)and other papers Readership: Atomic, nuclear and high energy physicists. keywords:

Download or read book Attainment of Electron Beam Suitable for Medium Energy Electron Cooling written by Sergei Seletskiy and published by . This book was released on 2005 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coherent Electron Cooling written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooling intense high-energy hadron beams remains a major challenge in modern accelerator physics. Synchrotron radiation is still too feeble, while the efficiency of two other cooling methods, stochastic and electron, falls rapidly either at high bunch intensities (i.e. stochastic of protons) or at high energies (e-cooling). In this talk a specific scheme of a unique cooling technique, Coherent Electron Cooling, will be discussed. The idea of coherent electron cooling using electron beam instabilities was suggested by Derbenev in the early 1980s, but the scheme presented in this talk, with cooling times under an hour for 7 TeV protons in the LHC, would be possible only with present-day accelerator technology. This talk will discuss the principles and the main limitations of the Coherent Electron Cooling process. The talk will describe the main system components, based on a high-gain free electron laser driven by an energy recovery linac, and will present some numerical examples for ions and protons in RHIC and the LHC and for electron-hadron options for these colliders. BNL plans a demonstration of the idea in the near future.

Download or read book Effect of Secondary Ions on the Electron Beam Optics in the Recycler Electron Cooler written by and published by . This book was released on 2010 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antiprotons in Fermilab's Recycler ring are cooled by a 4.3 MeV, 0.1-0.5 A DC electron beam (as well as by a stochastic cooling system). The unique combination of the relativistic energy ([gamma] = 9.49), an Ampere-range DC beam, and a relatively weak focusing makes the cooling efficiency particularly sensitive to ion neutralization. A capability to clear ions was recently implemented by way of interrupting the electron beam for 1-30 [mu]s with a repetition rate of up to 40 Hz. The cooling properties of the electron beam were analyzed with drag rate measurements and showed that accumulated ions significantly affect the beam optics. For a beam current of 0.3 A, the longitudinal cooling rate was increased by factor of ≈2 when ions were removed.

Download or read book Towards Demonstration of Electron Cooling with Bunched Electron Beam written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: All electron cooling systems which were in operation so far employed electron beam generated with an electrostatic electron gun in DC operating mode, immersed in a longitudinal magnetic field. At low energies magnetic field is also being used to transport electron beam through the cooling section from the gun to the collector. At higher energies (few MeV), it was shown that one can have simpler electron beam transport without continuous magnetic field. Because of a rather weak magnetic field on the cathode and in the cooling section the latter approach was referred to as 'non-magnetized cooling', since there was no suppression of the transverse angular spread of the electron beam with the magnetic field in the cooling section. Such a cooler successfully operated at FNAL (2005-11) at electron beam energy of 4.3 MeV. Providing cooling at even higher energies would be easier with RF acceleration of electron beam, and thus using bunched electron beam for cooling. Significant efforts were devoted to explore various aspects of such bunched electron beam cooling as part of R and D of high-energy electron cooling for RHIC. However, experimental studies of such cooling are still lacking. Establishing this technique experimentally would be extremely useful for future high-energy applications. Presently there is an ongoing effort to build Proof-of-Principle (PoP) experiment of Coherent Electron Cooling (CEC) at RHIC, which promises to be superior to conventional electron cooling for high energies. Since the CEC experiment is based on bunched electron beam and it has sections where electron beam co-propagates with the ion beam at the same velocity, it also provides a unique opportunity to explore experimentally conventional electron cooling but for the first time with a bunched electron beam. As a result, it allows us to explore techniques needed for the high-energy electron cooling such as 'painting' with a short electron beam and control of ion beam distribution under cooling which is essential if cooling is provided in a collider. The software needed for comparison with the experiments is already developed as part of the previous high-energy electron cooling studies for RHIC. Since electron beam will be non-magnetized and there will be no magnetic field in the cooling section it will be also a first demonstration of fully non-magnetized cooling. The purpose of these studies was to explore whether we would be able to observe conventional electron cooling with parameters expected in the CEC PoP experiment. Below we summarize requirements on electron beam and cooling section needed for such demonstration.

Download or read book Het klaer licht voor de Roomsch Katholyken written by and published by . This book was released on 1850* with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The State of the Art in Hadron Beam Cooling written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooling of hadron beams (including heavy-ions) is a powerful technique by which accelerator facilities around the world achieve the necessary beam brightness for their physics research. In this paper, we will give an overview of the latest developments in hadron beam cooling, for which high energy electron cooling at Fermilab's Recycler ring and bunched beam stochastic cooling at Brookhaven National Laboratory's RHIC facility represent two recent major accomplishments. Novel ideas in the field will also be introduced.