| Paper | Title | Page |
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| MOPAN012 | Development of the Injection- and Extraction Systems for the Upgrade of SIS18 | 167 |
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| SIS18 will serve as booster synchrotron for the proposed International Accelerator Facility FAIR at GSI. The aim is to provide high intensity proton and heavy ion beams of e.g. U28+-ions with a repetition rate of 2.7 - 4 cycles per second for injection into SIS100. The operation with low charge state heavy ions requires modifications of the injection and extraction systems. The goal is to minimize beam losses and thereby ion induced gas desorption during the injection and extraction processes. In order to increase the acceptance and for an injection at the reference energy it is necessary to build and install a new electrostatic inflector septum and a new inflector magnet. The electrostatic injection septum is designed for an operation at high field strength and enables a bake-out temperature of 300°C. This may be achieved by means of new cathode surface treatment procedures, e.g. with pulsed high intensity electron beams. Another technique is also under investigation, the coating of alumina by a plasma spray technique. | ||
| TUPAN013 | FAIR Synchrotron Operation with Low Charge State Heavy Ions | 1416 |
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Funding: Work supported by EU, contract No. 515876 Beam loss caused by charge changing process in connection with dynamic vacuum effects may limit the maximum number of accelerated heavy ions with low charge states in the existing synchrotron SIS18 and the planned SIS100/SIS300 of the FAIR project. With the aim to stabilize the vacuum dynamics and to control ionization beam loss, a substantial upgrade program has been defined for SIS18 and is presently realized. For SIS100, a new lattice design concept has been developed, where each lattice cell acts as a charge seperator and thereby enables the local control of beam loss. Simulation, conducted with the code STRAHLSIM, of the time dependent evolution of beam loss, dynamic residual gas pressure and the effect of the proposed dedicated ion catcher systems will be presented. |
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| TUPAN014 | Status of the FAIR SIS100/300 Synchrotron Design | 1419 |
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| The project status of the main accelerators, the SIS100 and SIS300 synchrotrons of the FAIR project will be presented. In order to accommodate more preferable technical solutions, the structure of the magnet lattice had to be modified in both machines. After these changes, more appropriate technical solutions for the main magnets and quench protection systems could be adapted. The general machine layout and design, e.g. of the demanding extraction schemes, has been detailed and open design issues were solved. The developments and design of all major technical systems are in progress and prototyping has started or is in preparation. | ||
| TUPAN015 | Ion Optical Layout of the FAIR Synchrotron and Beam Line Systems | 1422 |
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| The ion-optical layout of the two main synchrotrons and the high energy beam transport system of the FAIR project is summarized. SIS100 will be used to generate high intensity beams of all ion species from protons to uranium with a maximum rigidity of 100 Tm. The ion optical layout is optimized for the operation with heavy ions of medium charge states. For this purpose we developed a new ion optical design which provides a separation of the ionized beam particles from the circulating beam in each lattice cell. The chosen lattice structure provides a peaked loss distribution and enables the suppression of beam loss induced pressure bumps. Furthermore a compact layout of the extraction systems for slow and fast extraction at 100 Tm and 300 Tm has been developed. Since both synchrotrons are situated in the same tunnel, the SIS300 ion optical layout has to match the geometrical shape of the SIS100 precisely - although both rings use different lattice structures. The design of the beam transport system allows an effective parallel operation of the two synchrotrons, storage rings and experiments of the FAIR complex. |