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Dr Neil Bliss (CCLRC)12/04/2007 09:00Exhaustive description of the EMMA project.Go to contribution page
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Dr Yasushi Arimoto (Osaka U.)12/04/2007 09:30A PRISM-FFAG ring is one of the key component in PRISM (Phase Rotated Intense Slow Muon) project which aims at searching for a charged-lepton-flavor-violation process beyond the Standard Model. At the FFAG ring, energy-spread of muon beam is made narrower by a phase-rotation technique with RF field. A lattice design, a construction of large-aperture magnets and a development of a...Go to contribution page
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Prof. Yoshiharu MORI (Kyoto University, Research Reactor Institute)12/04/2007 10:30
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Dr François Méot (LPSC-CNRS)12/04/2007 11:30
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Dr Joseph Scott Berg (Brookhaven National Laboratory)12/04/2007 15:00I discuss some important considerations for end field representations. In particular, I consider transverse symmetries of the end fields, the use of vector potentials vs. scalar potentials, the use of Enge functions to represent the field, and the accuracy of the hard edge limit.Go to contribution page
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Dr Dejan Trbojevic (Brookhaven National Laboratory)12/04/2007 16:15Using the sector magnet wedges improves focusing in the vertical plane, reduces orbit offsets and tune variations of the non-scaling FFAG. There is a problem in a correct treatment of the wedge effect in the combined function magnets in the existing accelerator physics codes. To eliminate potential problems of the sector magnet with wedges a new magnet without wedges is...Go to contribution page
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Dr Shane KOSCIELNIAK (TRIUMF)12/04/2007 16:35
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Dr Werner Joho (PSI)12/04/2007 17:15
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Ben Shepherd (CCLRC Daresbury Laboratory)13/04/2007 09:00
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M. Carl Beard (ASTeC, Daresbury Laboratory)13/04/2007 09:30
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Dr Yasushi Arimoto (Osaka U.)13/04/2007 10:00Scaling FFAG magnets for PRISM-FFAG ring have been designed and constructed. The magnets have a large aperture of 1000 mm in horizontal and 300 mm in vertical. Measurement of magnetic field has been done for the three magnets. Here, the measurement results will be presented.Go to contribution page
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M. Thomas Planche (SIGMAPHI)13/04/2007 11:00
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M. Emmanuel Froidefond (LPSC/IN2P3/CNRS)13/04/2007 11:30In the frame of the RACCAM project, the coil shaping magnet design is studied. The main advantages of that method are to allow to keep horizontal tune constant and make possible the variation of k. A first simple model of conductors of infinite length and no iron yoke gives a first set of current intensities using Biot and Savart law. The problem is then to solve the linear system...Go to contribution page
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Dr Chihiro Ohmori (KEK)13/04/2007 12:00
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Prof. Neil Marks (CCLRC ASTeC)13/04/2007 14:00
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Dr takeichiro yokoi (University of Oxford)13/04/2007 14:45EMMA electron NS-FFAG is a prototype machine of NS-FFAG. In order to investigate beam dynamics in detail, injection and extraction energy should cover whole energy range. In addition, tune betatron tune varies from 0.1 to 0.4 along the energy range. Thus, to satisfy these requirements, different approach is required for the injection sheme compared to ordinary synchrotrons. ...Go to contribution page
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Dr Alessandro G. Ruggiero (BNL)13/04/2007 15:05
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Dr Carol Johnstone (Fermilab)13/04/2007 15:45Afternoon working group session - 2nd dayA hybrid design for a FFAG has been invented which uses a combination of edge and alternating-gradient focusing principles applied in a specific configuration to a combined-function magnet to stabilize tunes through an acceleration cycle which extends over a factor of 2-6 in momentum. Previous work on fixed-field alternating gradient (FFAG) accelerators have required the use of strong,...Go to contribution page
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Dr Jaroslaw Pasternak (LPSC-CNRS)13/04/2007 16:15
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Dr Joseph Scott Berg (Brookhaven National Laboratory)14/04/2007 09:00I begin by describing the purpose and goals for the EMMA lattice. I then describe the lattice parameters for the machine and how they are related to the machine goals.Go to contribution page
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Dr laurent Nadolski (Synchrotron Soleil)14/04/2007 09:30
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David KELLIHER (CCLRC)14/04/2007 10:00
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Dr Shinji Machida (CCLRC Rutherford Appleton Laboratory)14/04/2007 11:00Non-scaling FFAG has to cross many low order resonances during acceleration. Taking EMMA and Muon acceleration rings as a model, we study the effect of the resonance crossing by tracking. In particular, orbit distortion due to integer resonances and beam size growth (not emittance growth) due to half-integer resonances are investigated. We also discuss a practical way to study the...Go to contribution page
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Dr Sato Akira (Osaka University)14/04/2007 11:30
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Prof. Yoshiharu Mori (Kyoto Univwrsity, Research Reactor Institute)14/04/2007 12:00
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Dr Alessandro Ruggiero (Brookhaven National Laboratory)16/04/2007 09:00As an alternative to the use of a Superconducting Linac, we have explored at Brookhaven National Laboratory a complex made of a pair of Non-Scaling FFAGs for the acceleration of Ions of Uranium-238 for the production of Radio-Isotopes and esotic nuclear fragments. The beam power requirement is 400 kWatt at an energy of 400 MeV/ u. The design of the FFAG accelerators is straightfoward...Go to contribution page
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Dr Dejan Trbojevic (Brookhaven National Laboratory)16/04/2007 09:30A major cost of the Radioactive Ion accelerator is in the superconducting linac the present design assumes three superconducting linacs with stripping foils between two stages of heavy ion acceleration. The heavy ion maximum kinetic energy is assumed to be 400 MeV/u with a total of 400 kW power for uranium ion beams. To reduce the cost for the long superconducting linacs...Go to contribution page
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Dr Grahame Rees (CCLRC)16/04/2007 10:00
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M. franck lemuet (doctoral student)16/04/2007 11:00This paper describes the setting up of ray-tracing tools and preliminary beam dynamics studies concerning the electron model 3-5.4463~MeV of a non-linear, non-scaling proton driver FFAG 3-10~GeV.Go to contribution page
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Prof. Stephan TZENOV (CCLRC Daresbury Laboratory)16/04/2007 11:30Based on the synchro-betatron formalism the theory of accelerated orbits in FFAG accelerators is developed. Traditional notions like dispersion, momentum compaction and slip phase have been introduced with due account of the reference and accelerated orbit. Further, some preliminary features of the longitudinal dynamics have been pointed out.Go to contribution page
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Dr Alessandro Ruggiero (Brookhaven National Laboratory)16/04/2007 12:00The use of a Non-Scaling FFAG accelerator is here described for the acceleration of Protons to 1 GeV or more for an average beam power of 10 MWatt or more. Several modes of operation are descibed: at the repetition rate of 1 kHz, 10 kHz, and in Continuou Mode. The use of Harmonic Number Jump method for acceleration is also assumed. Possible applications for the Proton Driver...Go to contribution page
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Dr Ugo Amaldi (University of Milano Bicocca and TERA Foundation)16/04/2007 14:00Since many years the TERA Foundation is working on "cyclinacs", novel accelerators which produces a beam particularly suited for the many paintings spot-scanning technique of moving tumour targets. Indeed the beam from a cyclinac has repetition rates in the range 200-400 Hz, as necessary for painting many times the target, while the energy and the charge delivered to the next voxel can...Go to contribution page
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Dr Tomonori Uesugi (Kyoto Univ. Research Reactor Institute), Prof. Yoshiharu MORI (Kyoto University, Research Reactor Institute)16/04/2007 14:30
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Dr Ajit Kurup (Imperial College)16/04/2007 15:00
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Dr François Meot (LPSC-CNRS)16/04/2007 16:00
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M. William BEECKMAN (Ion Beam Applications s.a. (IBA))16/04/2007 16:30
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Dr Jacques Balossso (Grenoble Hospital)17/04/2007 09:00
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Dr Jérôme Mandrillon (CAL-Médicyc-AIMA), Dr Mathieu Conjat (CAL-Médicyc-AIMA)17/04/2007 09:30
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M. Joris Fourrier (LPSC / IN2P3 / CNRS)17/04/2007 10:00The computer code Zgoubi calculates charged particle trajectories in electric and magnetic fields. It allows the study of complex sequences of optical elements such as dipoles, quadrupoles, arbitrary multipoles, RF cavities and radial sector FFAG magnets. A new optical element - spiral sector FFAG magnet – has been recently installed in order to perform ray-tracing simulations in such a...Go to contribution page
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Dr Jaroslaw Pasternak (LPSC Grenoble)17/04/2007 10:15The Fixed Field Alternating Gradient (FFAG) accelerator with 100 Hz repetition rate is very interesting for medical applications. The Spiral FFAG ring accelerator for protontherapy is studied in the framework of the RACCAM project. Possible scenarios for the variable energy operation are discussed. The injection/extraction schemes are shown and the linear optics design is...Go to contribution page
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Dr Kota Okabe (Research Reactor Institute, Kyoto University), Dr Minoru Tanigaki (Research Reactor Institute, Kyoto University), Prof. Yoshiharu MORI (Kyoto University, Research Reactor Institute)17/04/2007 11:00
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Dr Eberhard Keil (CERN)17/04/2007 11:30Non-scaling FFAG rings for cancer hadron therapy offer reduced physical aperture and large dynamic aperture as compared with scaling FFAGs. We consider a system of three non-scaling FFAG rings for cancer therapy with 250 MeV protons and 400 MeV/u carbon ions. Hadrons are accelerated in a common RFQ and linear accelerator, and injected into the FFAG rings at v/c=0.1294. H+ and C6+ ions...Go to contribution page
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Dejan Trbojevic (Brookhaven National Laboratory)17/04/2007 12:00The major problem in a design and building of the carbon/proton therapy facilities are the isocentric gantries. The weight of the transport elements of the isocentric gantry in the most recent design in Darmstadt, Germany is 130 tons, while the whole gantry with support structure; (rotating part with transport elements and counter weights) is 630 tons. This represents the most...Go to contribution page
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Dr Chihiro Ohmori (KEK)17/04/2007 13:30
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Dr Jaroslaw Pasternak (LPSC/IN2P3/CNRS)17/04/2007 14:00
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Dr Grahame Rees (CCLRC)17/04/2007 14:30
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Dr Pierre Mandrillon (CAL/MEDICYC/AIMA)17/04/2007 15:00
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Dr Alessandro Ruggiero (Brookhaven National Laboratory)Afternoon working group session - 2nd dayOral presentationThe method of acceleration of Protons in a Non-Scaling FFAG has been proposed recently. Some issues are still outsdanding and need a closer review, namely the spreading of rf phase due to the discontinuity of the energy gain profile. At the purpose a numerical tracking has been done and the result will be described. Other issues deal with the realistic methods to achievement the...Go to contribution page
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Dejan Trbojevic (Brookhaven National Laboratory)The RACCAM project requires acceleration of protons to 180 MeV. A ring made of sixteen rotated linear combined function sector magnets, to accelerate protons with a momentum range of -54%<dp/p=< +54% is presented. Ring properties: orbits, layout, betatron functions, and tunes calculated by the PTC (Polymorphic Tracking Code) are presented.Go to contribution page
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Dr Dejan Trbojevic (Brookhaven National Laboratory)A combination of the two different non-scaling FFAG lattices makes a racetrack shape. A lattice with a very large radius of curvature and smaller number of cells is designed for the placement of the RF cavities. It is matched with respect to dispersion and other betatron functions at the central momentum to the two arcs with the non-scaling FFAG without drifts. The lattice designs are...Go to contribution page
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Dr Dejan Trbojevic (Brookhaven National Laboratory)A very compact superconducting non-scaling FFAG lattice for the carbon/proton therapy facility is presented. The very small orbit offsets usually produced with the non-scaling FFAG are compromised on the expense of number of magnets and machine size.Go to contribution page
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