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Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 116: Detektorsysteme 4

T 116.7: Vortrag

Donnerstag, 30. März 2017, 18:20–18:35, VSH 17

CLAWS Phase 2: Beam background monitoring in the commissioning of SuperKEKB — •Daniel Heuchel, Miroslav Gabriel, Hendrik Windel, Naomi van der Kolk, and Frank Simon — Max Planck Institute for Physics

The SuperKEKB accelerator in Tsukuba, Japan, is currently undergoing an extensive commissioning campaign, split in three phases. During the second phase, which is starting at the end of 2017, the inner part of Belle II will be replaced by a detector system called Beam Exorcism for a Stable ExperimenT II(BEAST II), specifically designed to measure background levels at the interaction point (IP) for different operation parameters of the accelerator.

One of the subsystems of this commissioning detector are the sCintillation Light And Waveform Sensors (CLAWS), consisting of two ladders with 8 small scintillator tiles, each individually read out by a silicon photomultiplier. The main focus of CLAWS is to study the time evolution of background originating from the continuous top-off injection of the accelerator. Thus, the system features sub-ns time resolution combined with continuous sampling over millisecond time scales. In this contribution, we will present the overall setup and design of the CLAWS phase 2 modules and discuss the performance of the detector elements. Furthermore, first results from a common integration and beam test, scheduled for February 2017 at DESY, will be discussed.

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