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| MOI1A02 | J-PARC Recovery Status | linac, extraction, status, kicker | 6 |
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| J-PARC facilities were seriously damaged by the Great East Japan Earthquake in March 2011, but all facilities resumed a beam operation from December 2012. We report the operation status of J-PARC accelerators after the earthquake. | |||
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Slides MOI1A02 [12.726 MB] | ||
| MOP240 | High Energy Tests of Advanced Materials for Beam Intercepting Devices at CERN HiRadMat Facility | simulation, instrumentation, laser, proton | 136 |
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| Predicting by simulations the consequences of LHC particle beams hitting Collimators and other Beam Intercepting Devices (BID) is a fundamental issue for machine protection: this can be done by resorting to highly non-linear numerical tools (Hydrocodes). In order to produce accurate results, these codes require reliable material models that, at the extreme conditions generated by a beam impact, are either imprecise or nonexistent. To validate relevant constitutive models or, when unavailable, derive new ones, a comprehensive experimental test foreseeing intense particle beam impacts on six different materials, either already used for present BID or under development for future applications, is being prepared at CERN HiRadMat facility. Tests will be run at medium and high intensity using the SPS proton beam (440 GeV). Material characterization will be carried out mostly in real time relying on embarked instrumentation (strain gauges, microphones, temperature and pressure sensors) and on remote acquisition devices (Laser Doppler Vibrometer and High-Speed Camera). Detailed post-irradiation analyses are also foreseen after the cool down of the irradiated materials. | |||
| TUO3A02 | Status and Results of the UA9 Crystal Collimation Experiment at the CERN-SPS | collimation, proton, ion, target | 245 |
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The UA9 experimental setup was installed in the CERN-SPS in 2009 to investigate the feasibility of the halo collimation assisted by bent crystals. Two-millimeter-long silicon crystals, with bending angles of about 150 microrad, are used as primary collimators instead than a standard amorphous target. Studies are performed with stored beams of protons and lead ions at 270 Z GeV. The loss profile is precisely measured in the area near to the crystal-collimator setup and in the downstream dispersion suppressor. A strong correlation of the losses in the two areas is observed and a steady reduction of dispersive losses is recorded at the onset of the channeling process. The loss map in the accelerator ring is is also reduced. These observations strongly support our expectation that the coherent deflection of the beam halo by a bent crystal should enhance the collimation efficiency in hadron colliders, such as LHC.
for the UA9 Collaboration |
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Slides TUO3A02 [5.936 MB] | ||
| WEO3A01 | High Energy Electron Cooling | electron, high-voltage, gun, controls | 363 |
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| The electron cooler of a 2 MeV for COSY storage ring FZJ is assembled in BINP. This paper describes the first experimental results from the electron cooler with electron beam and high voltage. The cooling section is designed on the classic scheme of low energy coolers like cooler CSRm, CSRe, LEIR that was produced in BINP before. The electron beam is transported inside the longitudinal magnetic field along whole trajectory from an electron gun to a collector. This optic scheme is stimulated by the wide range of the working energies 0.1(0.025)-2 MeV. The electrostatic accelerator consists of 34 individual unify section. Each section contains two HV power supply (±30 kV) and power supply of the magnetic coils. The electrical power to each section is provided by the cascade transformer. The cascade transformer is the set of the transformer connected in series with isolating winding. | |||
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Slides WEO3A01 [7.902 MB] | ||
| THO3C03 | Beam Induced Fluorescence - Profile Monitoring for Targets and Transport | electron, ion, target, cathode | 586 |
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| Online profile diagnostic is preferred to monitor intense hadron beams at the Facility of Antiproton and Ion Research (FAIR). One instrument for beam profile measurement is the gas based Beam Induced Fluorescence (BIF)-monitor. It relies on the optical fluorescence of residual gas, excited by beam particles. In front of production targets for radioactive ion beams or in plasma physics applications, vacuum constraints are less restrictive and allow a sufficient number of fluorescence photons, even at minimum ionizing energies. Unwanted effects like radiation damage and radiation induced background need to be addressed as well. A profile comparison of BIF and Ionization Profile Monitor (IPM) in nitrogen and rare gases is presented. We studied the BIF method from 10-3 to 30 mbar with an imaging spectrograph. Preferable fluorescence transitions and fundamental limitations are discussed. | |||
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Slides THO3C03 [7.371 MB] | ||