English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report on measurements of beam backgrounds during the first commissioningphase of the SuperKEKB collider in 2016, performed with the plasticscintillator and silicon photomultiplier-based CLAWS detector system. Thesub-nanosecond time resolution and single particle detection capability of thesensors allow bunch-by-bunch measurements, enable CLAWS to perform a novel timeresolved analysis of beam backgrounds, and make the system uniquely suited forthe study of injection backgrounds. We present measurements of various aspectsof regular beam background and injection backgrounds which include timestructure and decay behavior of injection backgrounds, hit-energy spectra andoverall background rates. These measurements show that the elevated backgroundrates following an injection generally last for several milliseconds, with themajority of the background particles typically observed within the first 500us. The injection backgrounds exhibit pronounced patterns in time, connected tobetatron and synchrotron oscillations in the accelerator rings. The frequenciesof these patterns are determined from detector data.

A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB