A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR
Optical Beam-Loss Monitors (oBLMs) allow for cost-efficient and spatially continuous measurements of beam losses at accelerator facilities. A standard oBLM consists of several tens of metres of optical fibre aligned parallel to a beamline, coupled to photosensors at either or both ends. Using the ti...
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2025-02-01
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| Online Access: | https://www.mdpi.com/2410-390X/9/1/4 |
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| author | Montague King Sara Benitez Alexander Christie Ewald Effinger Jose Esteban Wilfrid Farabolini Antonio Gilardi Pierre Korysko Jean Michel Meyer Belen Salvachua Carsten P. Welsch Joseph Wolfenden |
| author_facet | Montague King Sara Benitez Alexander Christie Ewald Effinger Jose Esteban Wilfrid Farabolini Antonio Gilardi Pierre Korysko Jean Michel Meyer Belen Salvachua Carsten P. Welsch Joseph Wolfenden |
| author_sort | Montague King |
| collection | DOAJ |
| description | Optical Beam-Loss Monitors (oBLMs) allow for cost-efficient and spatially continuous measurements of beam losses at accelerator facilities. A standard oBLM consists of several tens of metres of optical fibre aligned parallel to a beamline, coupled to photosensors at either or both ends. Using the timing information from loss signals, the loss positions can be reconstructed. This paper presents a novel oBLM system recently deployed at the CERN Linear Electron Accelerator for Research (CLEAR). Multiple methods of extracting timing and position information from measured waveforms with silicon photomultipliers (SiPM) and photomultiplier tubes (PMT) are investigated. For this installation, the optimal approach is determined to be applying a constant fraction discrimination (CFD) on the upstream readout. The position resolution is found to be similar for the tested SiPM and PMT. This work has resulted in the development of a user interface to aid operations by visualising the beam losses and their positions in real time. |
| format | Article |
| id | doaj-art-02db46cf231c4f8d9b0ef77a456c4703 |
| institution | Kabale University |
| issn | 2410-390X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Instruments |
| spelling | doaj-art-02db46cf231c4f8d9b0ef77a456c47032025-08-20T03:43:11ZengMDPI AGInstruments2410-390X2025-02-0191410.3390/instruments9010004A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEARMontague King0Sara Benitez1Alexander Christie2Ewald Effinger3Jose Esteban4Wilfrid Farabolini5Antonio Gilardi6Pierre Korysko7Jean Michel Meyer8Belen Salvachua9Carsten P. Welsch10Joseph Wolfenden11European Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandDepartment of Physics, Oxford University, Oxford OX1 3PU, UKEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandDepartment of Physics, Oxford University, Oxford OX1 3PU, UKEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandEuropean Organization for Nuclear Research (CERN), 1211 Meyrin, Geneva, SwitzerlandDepartment of Physics, University of Liverpool, Liverpool L69 7ZX, UKDepartment of Physics, University of Liverpool, Liverpool L69 7ZX, UKOptical Beam-Loss Monitors (oBLMs) allow for cost-efficient and spatially continuous measurements of beam losses at accelerator facilities. A standard oBLM consists of several tens of metres of optical fibre aligned parallel to a beamline, coupled to photosensors at either or both ends. Using the timing information from loss signals, the loss positions can be reconstructed. This paper presents a novel oBLM system recently deployed at the CERN Linear Electron Accelerator for Research (CLEAR). Multiple methods of extracting timing and position information from measured waveforms with silicon photomultipliers (SiPM) and photomultiplier tubes (PMT) are investigated. For this installation, the optimal approach is determined to be applying a constant fraction discrimination (CFD) on the upstream readout. The position resolution is found to be similar for the tested SiPM and PMT. This work has resulted in the development of a user interface to aid operations by visualising the beam losses and their positions in real time.https://www.mdpi.com/2410-390X/9/1/4beam lossoptical beam-loss monitorCherenkov radiationPMTSiPMbeam instrumentation |
| spellingShingle | Montague King Sara Benitez Alexander Christie Ewald Effinger Jose Esteban Wilfrid Farabolini Antonio Gilardi Pierre Korysko Jean Michel Meyer Belen Salvachua Carsten P. Welsch Joseph Wolfenden A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR Instruments beam loss optical beam-loss monitor Cherenkov radiation PMT SiPM beam instrumentation |
| title | A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR |
| title_full | A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR |
| title_fullStr | A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR |
| title_full_unstemmed | A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR |
| title_short | A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR |
| title_sort | systematic investigation of beam losses and position reconstruction techniques measured with a novel oblm at clear |
| topic | beam loss optical beam-loss monitor Cherenkov radiation PMT SiPM beam instrumentation |
| url | https://www.mdpi.com/2410-390X/9/1/4 |
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