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Open AccessArticle

Development of the LHCb VELO Detector Modules into a Standalone, Non-Invasive Online Beam Monitor for Medical Accelerators

1
Cockcroft Institute, Warrington WA44AD, UK
2
Department of Physics, University of Liverpool, Liverpool L693BX, UK
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Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
4
Faculty of Physics and Applied Computer Science, Akademia Górniczo-Hutnicza im. Stanisława Staszica (AGH), 30-059 Kraków, Poland
*
Author to whom correspondence should be addressed.
Current address: Now Elekta Limited Crawley, Crawley RH109RR, UK.
Instruments 2019, 3(1), 1; https://doi.org/10.3390/instruments3010001
Received: 28 September 2018 / Revised: 18 December 2018 / Accepted: 19 December 2018 / Published: 21 December 2018
(This article belongs to the Special Issue Diagnostics for Beam and Patient Monitoring)
Knowledge of the beam properties in proton therapy through beam monitoring is essential, ensuring an effective dose delivery to the patient. In clinical practice, currently used interceptive ionisation chambers require daily calibration and suffer from a slow response time. A new non-invasive method for dose online monitoring is under development based on the silicon multi-strip sensor LHCb VELO (VErtex LOcator), originally used for the LHCb experiment at CERN. The proposed method relies on proton beam halo measurements. Several changes in the system setup were necessary to operate the VELO module as a standalone system outside of the LHC environment and are described in this paper. A new cooling, venting and positioning system was designed. Several hardware and software changes realised a synchronised readout with a locally constructed Faraday Cup and the RF frequency of a medical cyclotron with quasi-online monitoring. The adapted VELO module will be integrated at the 60 MeV proton therapy beamline at the Clatterbridge Cancer Centre (CCC), UK and the capability as a beam monitor will be assessed by measuring the beam current and by monitoring the beam profile along the beamline in spring 2019. View Full-Text
Keywords: LHCb; VELO; proton therapy; non-invasive; online; beam monitor; diagnostics; medical accelerator LHCb; VELO; proton therapy; non-invasive; online; beam monitor; diagnostics; medical accelerator
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Schnuerer, R.; Yap, J.; Zhang, H.; Cybulski, T.; Smith, T.; Haefeli, G.; Girard, O.; Szumlak, T.; Welsch, C. Development of the LHCb VELO Detector Modules into a Standalone, Non-Invasive Online Beam Monitor for Medical Accelerators. Instruments 2019, 3, 1.

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