Cristin-resultat-ID: 1845495
Sist endret: 10. februar 2021, 10:57
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Measuring β* in SuperKEKB with K modulation

Bidragsytere:
  • Paul Conrad Vaagen Thrane
  • Rogelio Tomas
  • Adam Koval
  • Kazuhito Ohmi
  • Yukiyoshi Ohnishi og
  • Andreas Wegscheider

Tidsskrift

Physical Review Accelerators and Beams
ISSN 2469-9888
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Volum: 23
Hefte: 1
Artikkelnummer: 012803
Open Access

Importkilder

Scopus-ID: 2-s2.0-85084242318

Beskrivelse Beskrivelse

Tittel

Measuring β* in SuperKEKB with K modulation

Sammendrag

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.

Bidragsytere

Paul Conrad Vaagen Thrane

  • Tilknyttet:
    Forfatter
    ved Sveits
  • Tilknyttet:
    Forfatter
    ved Smart Sensors and Microsystems ved SINTEF AS

Rogelio Tomas

  • Tilknyttet:
    Forfatter
    ved Sveits

Adam Koval

  • Tilknyttet:
    Forfatter
    ved University of Dundee
  • Tilknyttet:
    Forfatter
    ved Sveits

Kazuhito Ohmi

  • Tilknyttet:
    Forfatter
    ved High Energy Accelerator Research organization, KEK

Yukiyoshi Ohnishi

  • Tilknyttet:
    Forfatter
    ved High Energy Accelerator Research organization, KEK
1 - 5 av 6 | Neste | Siste »