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THOA03 |
Progress on Transverse Beam Profile Measurement Using the Heterodyne Near Field Speckles Method at ALBA |
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- S. Mazzoni, F. Roncarolo, G. Trad
CERN, Geneva, Switzerland
- U. Iriso, C. Kamma-Lorger, A.A. Nosych
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
- M.A.C. Potenza
Universita’ degli Studi di Milano & INFN, Milano, Italy
- M. Siano
Università degli Studi di Milano, Milano, Italy
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We present the recent developments of a study aiming at measuring the transverse beam profile using the Heterodyne Near Field Speckles (HNFS) method. The HNFS technique consists of a suspension of nanoparticles suspended in a liquid and illuminated by synchrotron radiation (either in the visible or in X-ray wavelength range). The transverse coherence of the source, and therefore, under the conditions of validity of the Van Cittert and Zernike theorem, the transverse electron beam size is retrieved from the interference between the transmitted beam and the spherical waves scattered by each nanoparticle. We here describe the fundamentals of this technique, as well as the recent experimental results obtained with 12 keV radiation at the NCD beamline at ALBA. The applicability of such technique for future accelerators (e.g. CLIC or FCC) is also discussed.
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Slides THOA03 [2.414 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2018-THOA03
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About • |
paper received ※ 05 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019 |
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THOB02 |
Energy Loss Measurements with Streak Camera at ALBA |
548 |
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- A.A. Nosych, B. Bravo, U. Iriso
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
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Analyzing streak camera images of the beam injected into a Storage Ring with no RF voltage allows calculating several parameters, like the energy loss per turn and the energy mismatch between injected and stored beams. These measurements are based on the analysis of the centroid drift path of a bunch as it spirals inwards, changing its rotation period. This drift is clear and measurable in single and multi-bunch modes in several horizontal sweep speeds of the streak. With this technique we also measure the momentum compaction factor and observe its change with respect to the insertion devices’ open/closed states. The obtained values are comparable with theoretical expectations, as well as with values measured by other means.
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Slides THOB02 [3.030 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2018-THOB02
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About • |
paper received ※ 07 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019 |
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Export • |
reference for this paper using
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※ LaTeX,
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