10.3 Electron Accelerators and Electron–Positron Colliders

Seeman, J.

doi:10.1007/978-3-642-23053-0_37

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2024

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“…To improve luminosity, top-up injection was implemented at the end of 2019. During the data taking, small amounts of beam current are injected within short periods into the stored beam to keep the beam current almost constant [5]. In this way, the integrated luminosity was increased by around 30% [6,7].…”

Section: Introductionmentioning

confidence: 99%

Offline filter of data with abnormal high voltage at BESIII drift chamber

Zhang,

Ma,

et al. 2024

J. Inst.

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Stable operation of the detector is essential for high quality data taking in high energy physics experiments. But it is not easy to keep the detector always running stably, especially during data taking period in an environment with high beam-induced background. In the BESIII experiment, serious beam-related background can cause instability of the high voltages in the drift chamber, the innermost sub-detector. This could result in the decrease of gain and wrong dE/dx measurements. The relationship between the dE/dx measurement and the change in high voltage has been studied. To guarantee the data quality for physics study, an offline event filter algorithm has been developed to remove the data with abnormal high voltages of the drift chamber. After applying the event filter on the data set with serious high voltage problem, the events with wrong dE/dx measurement are removed effectively.

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Section: Introductionmentioning

confidence: 99%