Paper | Title | Page |
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MOPRO016 | NANOPERM® Broad Band Magnetic Alloy Cores for Synchrotron RF Systems | 95 |
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Recent developments in synchrotron acceleration systems show a demand for broadband MA (Magnetic Alloy) magnetic core loaded cavities with a high field gradient. For many facilities e.g. GSI, CoSY, J-Parc limited installation lengths requires high gradients in the region of 40kV/m. Both requirements rule out ferrite materials due to the lower maximum excitation levels and high Q-value. This request can solely be met by Finemet type cores like NANOPERM® produced by MAGNETEC. In this paper, the statistics of 22 huge cores made of NANOPERM® and measured high frequency properties are shown under free-space (FS) condition and compared with the theoretical expectation. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO016 | |
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MOPRO017 | Low Emittance Lattice Cell with Large Dynamic Aperture | 99 |
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Funding: The work is supported by the Ministry of Education and Science of the Russian Federation. Compact low emittance lattice cell providing large dynamic aperture is essential for development of extremely low (pm range) emittance storage rings. As it is well known, a pair of identical sextupoles connected by a mi-nus-identity matrix transformer in ideal case of kick-like magnets provides infinite dynamic aperture. Though the finite sextupole length degrades the aperture, it is still large enough, and in this report we discuss development of the low emittance cell providing the I condition for both horizontal and vertical chromatic sextupoles. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO017 | |
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MOPRO018 | Booster of Electrons and Positrons (BEP) Upgrade to 1 GeV | 102 |
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At present new electron and positron injection complex in BINP is comissioned and ready to feed VEPP-2000 collider with intensive beams with energy of 450 MeV. To obtain peak luminosity limited only by beam-beam effects in whole energy range of 160-1000 MeV and to perform high average luminosity with small dead time the top-up injection is needed. Booster BEP upgrade to 1 GeV includes modification of all magnetic elements, including warm dipoles magnetic field increase up to 2.6 T, vacuum chamber, RF-system, injection-extraction system. BEP comissioning is scheduled to the end of 2014. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO018 | |
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MOPRO019 | Energy Deposition and Quench Level Calculations for Millisecond and Steady-state Quench Tests of LHC Arc Quadrupoles at 4 TeV | 105 |
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In 2013, beam-induced quench tests with 4 TeV protons were performed to probe the quench level of LHC arc quadrupole magnets at timescales corresponding to millisecond beam losses and steady-state losses. As the energy deposition in magnet coils cannot be measured directly, this study presents corresponding FLUKA simulations as well as estimates of quench levels derived with the QP3 code. Furthermore, beam loss monitor (BLM) signals were simulated and benchmarked against the measurements. Simulated and measured BLM signals are generally found to agree within 30 percent. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO019 | |
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MOPRO020 | FLUKA Simulation of Particle Fluences to ALICE due to LHC Injection Kicker Failures | 109 |
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The counter-rotating beams of the LHC are injected in insertion regions which also accommodate the ALICE and LHCb experiments. An assembly of beam absorbers ensures the protection of machine elements in case of injection kicker failures, which can affect either the injected or the stored beam. In the first years of LHC operation, secondary particle showers due to beam impact on the injection beam stopper caused damage to the MOS injectors of the ALICE silicon drift detector as well as high-voltage trips in other ALICE subdetectors. In this study, we present FLUKA simulations of particle fluences to the ALICE cavern for injection failures encountered during operation. Two different cases are reported, one where the miskicked beam is fully intercepted and one where the beam grazes the beam stopper. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO020 | |
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MOPME073 | Status of Injection Complex VEPP-5: Machine Commissioning and First Experience of Positron Storage | 538 |
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The Injection complex VEPP-5 consist of S-band linear accelerators (270 and 420 MeV), positron convertor (at 270 MeV) and damping ring. The injection complex is in commission. Positron rate production about 6·108 positrons/pulse and conversion yield 0.14/GeV was achieved. Storage ring positron beam current is 70mA was achieved. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME073 | |
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