A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB
Abstract We report on measurements of beam backgrounds during the first commissioning phase of the SuperKEKB collider in 2016, performed with the plastic scintillator and silicon photomultiplier-based CLAWS detector system. The sub-nanosecond time resolution and single particle detection capability...
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-11-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09769-3 |
| _version_ | 1818856806038896640 |
|---|---|
| author | Miroslav Gabriel Frank Simon Hendrik Windel Yoshihiro Funakoshi Michael Hedges Naoko Iida Igal Jaegle Christian Kiesling Naomi van der Kolk Peter Lewis Hiroyuki Nakayama Yukiyoshi Ohnishi Riccardo de Sangro Yusuke Suetsugu Marco Szalay Sven Vahsen |
| author_facet | Miroslav Gabriel Frank Simon Hendrik Windel Yoshihiro Funakoshi Michael Hedges Naoko Iida Igal Jaegle Christian Kiesling Naomi van der Kolk Peter Lewis Hiroyuki Nakayama Yukiyoshi Ohnishi Riccardo de Sangro Yusuke Suetsugu Marco Szalay Sven Vahsen |
| author_sort | Miroslav Gabriel |
| collection | DOAJ |
| description | Abstract We report on measurements of beam backgrounds during the first commissioning phase of the SuperKEKB collider in 2016, performed with the plastic scintillator and silicon photomultiplier-based CLAWS detector system. The sub-nanosecond time resolution and single particle detection capability of the sensors allow bunch-by-bunch measurements, enable CLAWS to perform a novel time resolved analysis of beam backgrounds, and make the system uniquely suited for the study of injection backgrounds. We present measurements of various aspects of regular beam background and injection backgrounds which include time structure and decay behavior of injection backgrounds, hit-energy spectra and overall background rates. These measurements show that the elevated background rates following an injection generally last for several milliseconds, with the majority of the background particles typically observed within the first $${500}~\upmu \hbox {s}$$ 500 μ s . The injection backgrounds exhibit pronounced patterns in time, connected to betatron and synchrotron oscillations in the accelerator rings. The frequencies of these patterns are determined from detector data. |
| first_indexed | 2024-12-19T08:30:21Z |
| format | Article |
| id | doaj.art-f3c6276cfb544973b049e349d489cca3 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-19T08:30:21Z |
| publishDate | 2021-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-f3c6276cfb544973b049e349d489cca32022-12-21T20:29:12ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522021-11-01811111910.1140/epjc/s10052-021-09769-3A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKBMiroslav Gabriel0Frank Simon1Hendrik Windel2Yoshihiro Funakoshi3Michael Hedges4Naoko Iida5Igal Jaegle6Christian Kiesling7Naomi van der Kolk8Peter Lewis9Hiroyuki Nakayama10Yukiyoshi Ohnishi11Riccardo de Sangro12Yusuke Suetsugu13Marco Szalay14Sven Vahsen15Max-Planck-Institut für PhysikMax-Planck-Institut für PhysikMax-Planck-Institut für PhysikHigh Energy Accelerator Research Organization (KEK)University of HawaiiHigh Energy Accelerator Research Organization (KEK)University of HawaiiMax-Planck-Institut für PhysikMax-Planck-Institut für PhysikUniversity of HawaiiHigh Energy Accelerator Research Organization (KEK)High Energy Accelerator Research Organization (KEK)INFN Laboratori Nazionali di FrascatiHigh Energy Accelerator Research Organization (KEK)Max-Planck-Institut für PhysikUniversity of HawaiiAbstract We report on measurements of beam backgrounds during the first commissioning phase of the SuperKEKB collider in 2016, performed with the plastic scintillator and silicon photomultiplier-based CLAWS detector system. The sub-nanosecond time resolution and single particle detection capability of the sensors allow bunch-by-bunch measurements, enable CLAWS to perform a novel time resolved analysis of beam backgrounds, and make the system uniquely suited for the study of injection backgrounds. We present measurements of various aspects of regular beam background and injection backgrounds which include time structure and decay behavior of injection backgrounds, hit-energy spectra and overall background rates. These measurements show that the elevated background rates following an injection generally last for several milliseconds, with the majority of the background particles typically observed within the first $${500}~\upmu \hbox {s}$$ 500 μ s . The injection backgrounds exhibit pronounced patterns in time, connected to betatron and synchrotron oscillations in the accelerator rings. The frequencies of these patterns are determined from detector data.https://doi.org/10.1140/epjc/s10052-021-09769-3 |
| spellingShingle | Miroslav Gabriel Frank Simon Hendrik Windel Yoshihiro Funakoshi Michael Hedges Naoko Iida Igal Jaegle Christian Kiesling Naomi van der Kolk Peter Lewis Hiroyuki Nakayama Yukiyoshi Ohnishi Riccardo de Sangro Yusuke Suetsugu Marco Szalay Sven Vahsen A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB European Physical Journal C: Particles and Fields |
| title | A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB |
| title_full | A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB |
| title_fullStr | A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB |
| title_full_unstemmed | A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB |
| title_short | A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB |
| title_sort | time resolved study of injection backgrounds during the first commissioning phase of superkekb |
| url | https://doi.org/10.1140/epjc/s10052-021-09769-3 |
| work_keys_str_mv | AT miroslavgabriel atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT franksimon atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT hendrikwindel atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT yoshihirofunakoshi atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT michaelhedges atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT naokoiida atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT igaljaegle atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT christiankiesling atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT naomivanderkolk atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT peterlewis atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT hiroyukinakayama atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT yukiyoshiohnishi atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT riccardodesangro atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT yusukesuetsugu atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT marcoszalay atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT svenvahsen atimeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT miroslavgabriel timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT franksimon timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT hendrikwindel timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT yoshihirofunakoshi timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT michaelhedges timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT naokoiida timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT igaljaegle timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT christiankiesling timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT naomivanderkolk timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT peterlewis timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT hiroyukinakayama timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT yukiyoshiohnishi timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT riccardodesangro timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT yusukesuetsugu timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT marcoszalay timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb AT svenvahsen timeresolvedstudyofinjectionbackgroundsduringthefirstcommissioningphaseofsuperkekb |