Measurement of thermal properties of the LHCb VELO detector using track-based software alignment

Journal article

Abstract The thermal properties of the LHCb Vertex Locator (VELO) are studied using the real-time detector alignment procedure. The variation of the position and orientation of the detector elements as a function of the operating temperature of the VELO is presented. This study uses a dataset collected by the LHCb experiment during a VELO temperature scan performed at the end of LHC Run 2 (October 2018). Significant shrinkage of the VELO modules is observed at the operating temperature of -30°C compared to the laboratory measurements on a single module taken at a range of temperatures from +45°C to -25°C. The thermal shrinkage expected from the extrapolation of laboratory measurements to lower temperatures, and the results of this alignment study are in good agreement.

Authors: Akiba, K; Alexander, M; Barter, W; Bogdanova, G; Borghi, S

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Journal of Instrumentation
• Volume: 18
• Issue: 10
• Pages: P10003-P10003
• Publication date: 2023-10-02
• DOI: 10.1088/1748-0221/18/10/p10003
• EISSN: 1748-0221
• ISSN: 1748-0221
• Language: English
• Keywords: Materials science; Detector; Statistics; Computer science; Mathematics; Range (aeronautics); Thermal; Large Hadron Collider; Track (disk drive); Extrapolation; Position (finance); Vertex (graph theory); Nuclear physics; Optics; Physics