synchrotron oscillations
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2021 ◽  
Vol 81 (11) ◽  
Author(s):  
Miroslav Gabriel ◽  
Frank Simon ◽  
Hendrik Windel ◽  
Yoshihiro Funakoshi ◽  
Michael Hedges ◽  
...  

AbstractWe 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.



2019 ◽  
Vol 69 (9) ◽  
pp. 951-956
Author(s):  
Soon-Kwon NAM* ◽  
Yun Seong PARK


2017 ◽  
Vol 19 (9) ◽  
pp. 093010 ◽  
Author(s):  
G M Wang ◽  
T Shaftan ◽  
V Smaluk ◽  
Y Li ◽  
R Rand


2016 ◽  
Author(s):  
Guimei Wang ◽  
Timur Shaftan ◽  
Victor Smalyuk ◽  
Y. Li ◽  
James Rose








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