| Article | |
| Title | Spark Activity Monitoring for LHC Beam Dump System |
| Author(s) | Durmus, Can Berk (CERN) ; Carlier, Etienne (CERN) ; Magnin, Nicolas (CERN) ; Mottram, Timothy (CERN) ; Senaj, Viliam (CERN) |
| Publication | 2023 |
| Number of pages | 4 |
| In: | JACoW ICALEPCS 2023 (2023) 784-787 |
| In: | 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.784-787 |
| DOI | 10.18429/JACoW-ICALEPCS2023-TUPDP099 |
| Subject category | Accelerators and Storage Rings |
| Abstract | LHC Beam Dump System is composed of 25 fast-pulsed magnets per beam to extract and dilute the beam onto an external absorber block. Each magnet is powered by a high voltage generator to discharge the energy stored in capacitors into the magnet by using high voltage switches. These switches are housed in air in cabinets which are not dust protected. In the past years of LHC operation, we noticed electrical sparks on the high voltage switch due to the release of accumulated charges on the surfaces of the insulators and the switches. These sparks can potentially cause self-trigger of the generators increasing the risk of asynchronous dumps which should be avoided as much as possible. In order to detect dangerous spark activity in the generators before a self-trigger occurs, a Spark Activity Monitoring (SAM) system was developed. SAM consists of 50 detection and acquisition systems deployed at the level of each high voltage generator, and one external global surveillance process. The detection and acquisition systems are based on digitisers to detect and capture spark waveforms coming from current pick-ups placed in various electrical paths inside each generator. The global surveillance process is collecting data from all the acquisition systems in order to assess the risk of self-trigger based on the detected sparks amplitude and rate. This paper describes the architecture, implementation, optimisation, deployment and operational experience of the SAM system. |
| Copyright/License | CC-BY-4.0 |
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Record created 2024-04-23, last modified 2024-04-23