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| MOPPD001 | Accelerator R&D in the QUASAR Group | antiproton, diagnostics, storage-ring, niobium | 364 |
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Funding: Work supported by the Helmholtz Association and GSI under contract VH-NG-328, the EU under contracts PITN-GA-2008-215080, PITN-GA-2011-289191, PITN-GA-2011-289485 and STFC. The QUASAR Group was founded in 2007 with an initial focus on the development and experimental exploitation of a novel electrostatic ultra-low energy storage ring (USR), part of the future facility for low-energy antiproton and ion research (FLAIR). The group's research activities have grown considerably over the past four years and now include also the development of beam diagnostic tools for accelerators and light sources, investigations into superconducting linear accelerators and medical applications, and, most recently, a broad R&D program into laser applications at accelerators. In this contribution, an overview of the QUASAR Group’s research achievements to date is given. |
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| MOPPD003 | DITANET - An International Network in Beam Diagnostics | diagnostics, emittance, simulation, monitoring | 370 |
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Funding: Work supported by the European Union under contract PITN-GA-2008-215080. DITANET is the largest-ever EU funded research and training network in beam diagnostics. It brings together universities, research centers and industry partners to jointly develop diagnostics methods for a wide range of existing or future particle accelerators. This is achieved through a cohesive approach that allows for the exploitation of synergies, whilst promoting knowledge exchange between partners. In addition to its broad research program, the network organizes a large number of international schools and topical workshops for the beam instrumentation and particle accelerator communities. The project comes to an end in May 2012. This contribution presents some of the network's recent research outcomes and training activities. |
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| MOPPD004 | oPAC - Optimizing Accelerators through International Collaboration | simulation, laser, controls, emittance | 373 |
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Funding: Work supported by the European Union under contract PITN-GA-2011-289485. The optimization of the performance of any particle accelerator critically depends on an in-depth understanding of the beam dynamics in the machine and the availability of simulation tools to study and continuously improve all accelerator components. It also requires a complete set of beam diagnostics methods to monitor all important machine and beam parameters with high precision and a powerful control and data acquisition system. Within the oPAC project all these aspects will be closely linked with the aim to optimize the performance of present and future accelerators that lie at the heart of many research infrastructures. The project brings together 22 institutions from around the world. With a project budget of 6 M€, it is one of the largest research and training networks ever funded by the EC. This contribution gives an overview of the network's broad research program and summarizes the training events that will be organized by the consortium within the next 4 years. |
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| MOPPR006 | Surface Waves for Testing of Beam Instrumentation | impedance, resonance, induction, electromagnetic-fields | 780 |
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| The fundamental TM wave can be guided as a surface wave along a single dielectric coated wire. Such a setup is known as a Goubau line. Close to the wire the TM wave resembles closely the radial electric and azimuthal magnetic fields of a charged particle beam moving in an accelerator. Hence, it can be used to test beam instrumentation in the workshop. We introduce the principle, discuss benefits, and compare measurements of a beam instrumentation device performed with a Goubau line to measurements performed with a standard bench testing setup. | |||
| MOPPR045 | Beam Diagnostics for ESS | linac, target, diagnostics, DTL | 882 |
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| The European Spallation Source (ESS), to be built in the south of Sweden, will use a 2.5 GeV superconducting linac to produce the worlds most powerful neutron source. The project is currently in a pre-construction phase, during which the linac design is being updated. This paper describes the current plans for beam diagnostics in terms of requirements, number and locations of different systems, and possible technical solutions. | |||
| TUPPC022 | Straight Scaling FFAG Experiment | emittance, linac, vacuum, closed-orbit | 1209 |
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| Straight scaling FFAG experiment has been done at Kyoto University research reactor institute. Details and results are presented here. | |||
| WEPPP075 | Hyper-V Virtualization at ALS High Level Accelerator Control | controls, EPICS, monitoring, status | 2885 |
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Funding: Work supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 In an effort to virtualize a windows-based computing infrastructure utilized by the ALS high-level controls system, Microsoft 2008 R2 servers were employed for support of the control room console stations. The Windows 2008 R2 server roles were used to create Hyper-V consoles, streamline console deployment, maintain security updates and other support services behind a secure network filter. In the current phase, the aim is to adopt a cluster-based configuration to provide efficient use of server resources and failover capabilities to multiple virtual machines. The current work will discuss the methods and findings from this study. |
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| THEPPB011 | Apparatus and Experimental Procedures to Test Crystal Collimation | collimation, alignment, proton, ion | 3254 |
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UA9 is an experimental setup operated in the CERN-SPS in view of investigating the feasibility of halo collimation assisted by bent crystals. The UA9 collimation system is composed only of one crystal acting as primary halo deflector and one single absorber. Different crystals are tested in turn using two-arm goniometers with an angular reproducibility of better than 10 microrad. The performance of the system are assessed through the study of the secondary and tertiary halo in critical areas, by using standard machine instrumentation and few customized equipments. The alignment of the crystal is verified by measuring the loss rate close to the crystal position. The collimation efficiency is computed by intercepting the deflected halo with a massive collimator or with an imaging device installed into a Roman Pot. The leakage of the system is evaluated in the dispersion suppressor by means of movable aperture restrictions. In this contribution the setup and the experimental methods in use are revisited in a critical way and thoroughly discussed. Particular emphasis is given on feasibility, reproducibility and effectiveness of the operational procedures.
For the UA9 Collaboration |
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| THPPC035 | Final Assembly and Testing of the MICE Superconducting Spectrometer Solenoids | solenoid, vacuum, radiation, focusing | 3362 |
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Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC02-05CH11231. The Muon Ionization Cooling Experiment (MICE) is an international effort to demonstrate the principle of ionization cooling in a segment of a realistic cooling channel using a muon beam. The experiment is sited at Rutherford Appleton Laboratory in England. A 4-tesla uniform field region at each end of the cooling channel will be provided by a pair of identical, 3-m long spectrometer solenoids. As the beam enters and exits the cooling channel, the emittance will be measured within both the upstream and downstream 400 mm diameter magnet bores. Each magnet consists of a three-coil spectrometer magnet group and a two-coil pair that matches the solenoid uniform field into the adjacent MICE cooling channel. An array of five two-stage cryocoolers and one single-stage cryocooler are used to maintain the temperature of the magnet cold mass, radiation shield and current leads. Previous testing revealed several operational and design issues related to heat leak and quench protection that have since been corrected. Details of the magnet design modifications and their final assembly as well as the results of quench training tests will be presented here. |
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| THPPD031 | Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC | quadrupole, dipole, simulation, factory | 3572 |
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| After the incident of September 2008, the operational beam energy of the LHC has been set to 3.5 TeV, since not all joints of the superconducting busbars between magnets have the required quality for 7 TeV operation. This choice is based on simulations to determine the safe current in the main dipole and quadrupole magnets, reproducing the thermal behavior of a quenched superconducting joint by taking into account all relevant factors that affect a possible thermal runaway. One important parameter of the simulation is the RRR (Residual Resistivity Ratio) of the copper stabilizer of the busbar connecting superconducting magnets. A dedicated campaign to measure this quantity for the main 13kA circuits of the LHC on all sectors was performed during the Christmas stop in December 2010 and January 2011. The measurement method as well as the data analysis and results are presented in this paper. | |||