Paper | Title | Other Keywords | Page |
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MOB3IO02 | LHC Operation at 6.5 TeV: Status and Beam Physics Issues | ion, luminosity, operation, radiation | 37 |
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LHC operation restarted in 2015 after the first Long Shutdown, planning for a 4-year long run until the end of 2018 (called Run 2). The beam energy was fixed at 6.5 TeV. The year 2015 was dedicated to establishing operation at the high energy and with 25 ns beams, in order to prepare production for the following three years. The year 2016 was the first one dedicated to production, and it turned out to be a record-breaking year, in which the goals in both peak and integrated luminosities with proton-proton beams were achieved and surpassed. This paper revisits 2015 and 2016, shortly highlighting the main facts in the timelines, recalling the parameters that characterized luminosity production, and sketching the main limitations and the main highlights of results for selected topics, including a particular focus on the beam physics issues. | |||
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Slides MOB3IO02 [15.183 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOB3IO02 | ||
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TUPOA26 | Initial Observations of Micropulse Elongation of Electron Beams in a SCRF Accelerator* | ion, electron, laser, gun | 337 |
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Funding: * Work at Fermilab supported by Fermi Research Alliance, LLC under Contract No. DE-AC02- 07CH11359 with the United States Department of Energy Commissioning at the SCRF accelerator at the Fermilab Accelerator Science and Technology (FAST) Facility has included the implementation of a versatile bunch-length monitor located after the 4-dipole chicane bunch compressor for electron beam energies of 20-50 MeV and integrated charges in excess of 10 nC. The team has initially used a Hamamatsu C5680 synchroscan streak camera. An Al-coated Si screen was used to generate optical transition radiation (OTR) resulting from the beam's interaction with the screen. The chicane bypass beamline allowed the measurements of the bunch length without the compression stage at the downstream beamline location using OTR and the streak camera. The UV component of the drive laser had previously been characterized with a Gaussian fit σ of 3.5-3.7 ps**. However, the uncompressed electron beam is expected to elongate due to space charge forces in an initial 1.5-m drift from the gun to the first SCRF accelerator cavity. We have observed electron beam bunch lengths from 5 to 14 ps (σ) for micropulse charges of 60 pC to 800 pC, respectively. Commissioning of the system and initial results with uncompressed and compressed beam will be presented. **A.H. Lumpkin et al., Proceedings of FEL14, MOP021, Basel, Switzerland, www. JACoW.org |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOA26 | ||
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TUB3IO01 | Commissioning of the Max IV Light Source | ion, storage-ring, cavity, vacuum | 439 |
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The MAX IV facility, currently under commissioning in Lund, Sweden, features two electron storage rings operated at 3 GeV and 1.5 GeV and optimized for the hard X-ray and soft X-ray/VUV spectral ranges, respectively. A 3 GeV linear accelerator serves as a full-energy injector into both rings as well as a driver for a short-pulse facility, in which undulators produce X-ray pulses as short as 100 fs. In this paper, we briefly review the overall facility layout and design concepts and focus on recent results obtained in commissioning of the accelerators with an emphasis on the ultralow emittance 3 GeV ring, the first light source using a multibend achromat. | |||
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Slides TUB3IO01 [6.269 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUB3IO01 | ||
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TUB4IO02 | Accelerator Technical Progress and First Commissioning Results from the European XFEL | ion, linac, FEL, electron | 469 |
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The construction of the European XFEL is coming to an end. The linac tunnel will be closed and commissioning of the main linac will start. The status of the construction project is reviewed. Commissioning of the injector of the European XFEL was already performed in 2016 while construction of the main linac was continuing. The commissioning goals and achievements for the XFEL injector will be reviewed.
Proposed Speaker: W. Decking, DESY |
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Slides TUB4IO02 [13.428 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUB4IO02 | ||
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TUPOB08 | Beam Extraction from the Recycler Ring to P1 Line at Fermilab | ion, extraction, proton, kicker | 497 |
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The transfer line for beam extraction from the Recycler ring to P1 line provides a way to deliver 8 GeV kinetic energy protons from the Booster to the Delivery ring, via the Recycler, using existing beam transport lines, and without the need for new civil construction. It was designed in 2012. The kicker magnets at RR520 and the lambertson magnet at RR522 in the RR were installed in 2014 Summer Shutdown, the elements of RR to P1 Stub (permanent quads, trim quads, correctors, BPMs, the toroid at 703 and vertical bending dipole at V703 (ADCW) ) were installed in 2015 Summer Shutdown. On Tuesday, June 21, 2016, beam line from the Recycler Ring to P1 line was commissioned. The detailed results will be presented in this report. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB08 | ||
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WEPOA15 | Installation Progress at the PIP-II Injector Test at Fermilab | ion, rfq, controls, linac | 722 |
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Funding: Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy A CW-compatible, pulsed H− superconducting linac 'PIP-II' is being planned to upgrade Fermilab's injection complex. To validate the concept of the front-end of such a machine, a test accelerator (The PIP-II Injector Test, formerly known as "PXIE") is under construction. The warm part of this accelerator comprises a 10 mA DC 30 keV H− ion source, a 2m-long LEBT, a 2.1 MeV CW RFQ, and a 10-m long MEBT that is capable of creating a large variety of bunch structures. The paper will report on the installation of the RFQ and the first sections of the MEBT and related mechanical design considerations. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA15 | ||
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WEPOA24 | Installation and Commissioning of an Ultrafast Electron Diffraction Facility as Part of the ATF-II Upgrade | ion, operation, experiment, electron | 742 |
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Funding: This work was funded by the US Department of Energy under contract DE-SC0012704. The Accelerator Test Facility (ATF) at Brookhaven National Laboratory (BNL) is presently carrying out an upgrade, ATF-II, which will provide significantly expanded experimental space and capabilities for its users. One of the new capabilities being integrated into the ATF-II program is an Ultrafast Electron Diffraction (UED) beam line, which was originally deployed in the BNL Source Development Laboratory. Inclusion of the UED in the ATF-II research portfolio will enable ongoing development and extension of the UED capabilities for use in materials research. We discuss the design, installation and commissioning of the UED beam line at ATF-II as well as plans for future upgrades. |
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Poster WEPOA24 [18.332 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA24 | ||
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WEPOB03 | Magnetic Measurements of Storage Ring Magnets for the APS Upgrade Project | ion, alignment, quadrupole, sextupole | 884 |
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Funding: * Work supported by U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357, and contract number DE-SC0012704 for work associated with Brookhaven National Laboratory. Extensive prototyping of storage ring magnets is ongoing at the Advanced Photon Source (APS) in support of the APS Multi-Bend Achromat upgrade (APS-U) project. As part of the R&D activities 4 quadrupole magnets with slightly different geometries and pole tip materials, and one sextupole magnet with vanadium permendur pole tips were designed, built and tested. Magnets were measured individually using a rotating coil and a Hall probe for detailed mapping of the magnetic field. Magnets were then assembled and aligned relative to each other on a steel support plate and concrete plinth using precision machined surfaces to gain experience with the alignment method chosen for the APS-U storage ring magnets. The required alignment of magnets on a common support structure is 30 micron rms. Measurements of magnetic field quality, strength and magnet alignment after subjecting the magnets and assemblies to different tests will be presented. |
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Poster WEPOB03 [1.242 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB03 | ||
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WEPOB57 | Magnetic Optimization of Long EPUs at NSLS-II | ion, undulator, insertion-device, insertion | 1018 |
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The Soft Inelastic X-ray scattering (SIX) and the Elec-tron-Spectro-Microscopy (ESM) are two beamlines under construction at National Synchrotron Light Source-II (NSLS-II). The specifics of these two beamlines requested the use of two long Advanced Planar Polarized Light Emitter-II (APPLE-II) undulators, as a source that provides circularly and vertically polarized radiation. Thus we designed 3.5 m and 2.7m long APPLE-II type undulators for SIX and ESM. The NSLS-II ID group is responsible for the magnetic optimization of these two long undulators. In this paper, we first summarize the APPLE-II magnetic and mechanical design. Then, we discuss the magnetic performance of the first APPLE-II achieved with the shimming performed at BNL. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB57 | ||
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THPOA64 | MAX IV Storage Ring Magnet Installation Procedure | ion, storage-ring, vacuum, operation | 1234 |
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The MAX IV facility consists of a 3 GeV storage ring, a 1.5 GeV storage ring and a full energy injector linac. The storage ring magnets are based on an integrated "magnet block" concept. Each magnet block holds several consecutive magnet elements. The 3 GeV ring consists of 140 magnet blocks and 1.5 GeV ring has 12 magnet blocks. During the installation, procedures were developed to guarantee block straightness. This article discusses the installation procedure from a mechanical point of view and presents measurement data of block straightness and ring performance. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THPOA64 | ||
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FRB1IO02 | LIGHT: A Linear Accelerator for Proton Therapy | ion, linac, proton, rfq | 1282 |
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ADAM, Application of Detectors and Accelerators to Medicine is a Swiss Company based in Geneva Switzerland established on 20th December 2007. ADAM was founded to promote scientific know-how and innovations in medical technology for cancer treatment. In 2007 a first partnership agreement was signed with CERN and in 2011 ADAM has been officially recognized as CERN spin-off. After the first research results other partnership agreements were signed between ADAM and CERN with the main goal of establishing a framework within which the two parties can collaborate to develop novel technologies for detectors and accelerators. Currently ADAM research activity is mainly focused on the construction and testing of its first linear accelerator for medical application: LIGHT (Linac for Image-Guided Hadron Therapy). LIGHT is an innovative linear accelerator designed to revolutionise hadron therapy facilities by simplifying the infrastructure and make them profitable from an industrial point of view while providing a better quality beam. The current design allow LIGHT to accelerate proton beam up to 230MeV with several advantages comparing to the current solutions present in the market. | |||
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Slides FRB1IO02 [7.447 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-FRB1IO02 | ||
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