Paper | Title | Page |
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TUOBA01 | Beam Commissioning of SuperKEKB | 1019 |
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In this report, we describe the machine operation in the first 3 months of the Phase 1 commissioning of SuperKEKB. The beam commissioning is smoothly going on. Vacuum scrubbing, the optics corrections and others are described. | ||
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Slides TUOBA01 [9.346 MB] | |
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUOBA01 | |
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WEPOY040 | Lattice Translation Between Accelerator Simulation Codes for Superkekb | 3077 |
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To improve collaborative studies on beam dynamics for SuperKEKB between several labs, efforts have been made to translate the SAD lattices of SuperKEKB rings to the versions for other codes: AT, Bmad, MAD-X, and PTC. It turns out that lattice translations between these codes are not straightforward because of the complexity of the SuperKEKB lattices. In this paper, we describe our experiences of lattice translations, and present some results of benchmarks for the case of SuperKEKB. | ||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY040 | |
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THPOR007 | Optics Measurements and Corrections at the Early Commissioning of SuperKEKB | 3782 |
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We present experimental results of measurements and corrections of the optics at the early Phase-1 commissioning of SuperKEKB which is a positron-electron collider built to achieve the target luminosity of 8x1035 cm-2s-1. We have three stages; the Phase-1 is the commissioning of the machine without the final focus magnets and detector solenoid(no collision); the collision with the final focus system and the Belle II detector will be performed at the Phase-2 and Phase-3. The strategy for the luminosity upgrade is a novel "nano-beam'' scheme found elsewhere*. In order to achieve the target luminosity, the vertical emittance has to be reduced by corrections of machine error measured by orbit responses. The vertical emittance should be achieved to be less than 6 pm(0.2 % coupling) during the Phase-1 by fully utilizing correction tools of skew quadrupole-like coils wound on sextupole magnets and power supplies for each correction coil in quadrupole magnets. In addition to the linear optics, the optics for off-momentum particles is also studied to understand a dynamic aperture affects the Touschek lifetime.
* "SuperB Conceptual Design Report", INFN/AE-07/2, SLAV-R-856, LAL 07-15, (2007). |
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DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR007 | |
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THPOY027 | Commissioning Status of SuperKEKB Injector Linac | 4152 |
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The SuperKEKB main ring is currently being constructed for aiming at the peak luminosity of 8 x 1035 cm-2s−1. The electron/positron injector linac upgrade is also going on for increasing the intensity of bunch charge with keeping the small emittance. The key upgrade issues are the construction of positron damping ring, a new positron capture system, and a low emittance photo-cathode rf electron source. The injector linac beam commissioning started in the October of 2013. In this paper, we report the present status and future plan of SuperKEKB injector commissioning. | ||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY027 | |
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