dc.contributor.author | Thrane, Paul Conrad Vaagen | |
dc.contributor.author | Tomas, Rogelio | |
dc.contributor.author | Koval, Adam | |
dc.contributor.author | Ohmi, Kazuhito | |
dc.contributor.author | Ohnishi, Yukiyoshi | |
dc.contributor.author | Wegscheider, Andreas | |
dc.date.accessioned | 2023-03-28T12:38:19Z | |
dc.date.available | 2023-03-28T12:38:19Z | |
dc.date.created | 2020-11-06T09:30:55Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Physical Review Accelerators and Beams. 2020, 23 (1), 012803. | en_US |
dc.identifier.issn | 2469-9888 | |
dc.identifier.uri | https://hdl.handle.net/11250/3060745 | |
dc.description.abstract | SuperKEKB is an asymmetric energy electron positrion collider currently under commissioning in Japan. It aims to achieve a record high luminosity of 8 × 10 35 cm − 2 s − 1 , for which accurate control of β ∗ y is needed. The advanced final focus system is also relevant for studies related to future linear colliders, which similarly need to achieve very small beam sizes. To work for SuperKEKB, the K modulation technique is generalized to allow known quadrupole fields between the modulated magnets and the interaction point. Initial measurements taken in HER agree with simulations, and show that K modulation is suitable for measuring the minimum of the β function at the interaction point within 1%, however it is too uncertain to be used for measuring the displacement of the beam waist away from the interaction point. In addition, tune shift equations for a modulated quadrupole are derived without assuming a thin lens perturbation, giving a simple method to calculate the tune shift to second order in the quadrupole strength modulation. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.uri | https://link.aps.org/doi/10.1103/PhysRevAccelBeams.23.012803 | |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Measuring β* in SuperKEKB with K modulation | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 14 | en_US |
dc.source.volume | 23 | en_US |
dc.source.journal | Physical Review Accelerators and Beams | en_US |
dc.source.issue | 1 | en_US |
dc.identifier.doi | 10.1103/PhysRevAccelBeams.23.012803 | |
dc.identifier.cristin | 1845495 | |
dc.source.articlenumber | 012803 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |