| Paper | Title | Page |
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| THPME102 | Beam-based Tests of Intercepting Transverse Profile Diagnostics for FAIR | 3480 |
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Funding: Partly funded by German Ministry of Science (BMBF), contract number 05P12RDRBJ. The FAIR facility will serve as a versatile accelerator for ions of energies between 100 MeV/u and 29 GeV/u with an intensity variation over more than 6 orders of magnitude. In the transport lines the transverse profile determination will be based mainly on intersecting methods: Scintillations screens, SEM-Grids, Multi-Wire-Proportional Chambers and possibly Optical Transition Radiation screens. The devices are tested at the existing SIS18 at GSI where ions are ex-tracted either in a fast mode (about 1 mus) or resonant mode within about typically 0.3 s. The imaging properties of scintillation screens of different materials (ceramics, phosphor screens and single crystals) with ion beams with energies above 300 MeV/u were investigated. Over intensities 105 to 109 particles per pulse the light yield for the screens is linear with respect to the ion intensity. Moreover, the radiation resistance of the screens was tested. The applicability of optical transition radiation for beams of velocities below 90%c was investigated systematically with heavy ions. The experimental results are compared to wire-based methods obtained with SEM-Grids and MWPCs. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME102 | |
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| THPME103 | Beam Current Monitors for FAIR | 3483 |
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| The FAIR (Facility for Antiproton and Ion Research) accelerator facility presently under construction at GSI will supply a wide range of beam intensities for physics experiments. Design beam intensities range from 2.5·1013 protons/cycle to be delivered to the pBar-target and separator for production of antiprotons, to beams of e.g. 109 ions/s in the case of slowly extracted beams. The large intensity range demands for dedicated beam current monitors for precise, non-destructive beam intensity measurements in the synchrotrons, transport lines and storage rings of the FAIR facility. This report describes GSI developments of purpose-built beam current monitors for the SIS100 synchrotron and high-energy beam transport lines (HEBT) of FAIR. Prototype measurements with a SQUID-based Cryogenic Current Comparator and a resonant beam charge transformer are presented, and possibilities for further upgrades are discussed. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME103 | |
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| THPME122 | A SQUID-based Beam Current Monitor for FAIR | 3524 |
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| A Cryogenic Current Comparator (CCC) was developed for the upcoming FAIR-Project, providing a non-destructive online monitoring of the beam current in the nA-range. The CCC was optimized for a lowest possible noise-limited current resolution together with a high system bandwidth. Therefore, the low temperature properties of ferromagnetic core materials used in the pick-up coil were investigated and different SQUID-systems were tested. In this contribution we present results of the completed Cryogenic Current Comparator for FAIR working in a laboratory environment, regarding the improvements in resolution and bandwidth due to the use of suitable ferromagnetic core materials and optimized SQUID-system components. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME122 | |
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