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TY - CONF AU - Alexandrova, A.S. AU - Brynes, A.D. AU - Devlin, L.J. AU - Effinger, E. AU - Holzer, E.B. AU - Jackson, F. AU - Kastriotou, M. AU - Scott, D.J. AU - Tzoganis, V. AU - Welsch, C.P. AU - del Busto, E.N. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - Optical Beam Loss Monitor for RF Cavity Characterisation J2 - Proc. of IBIC2017, Grand Rapids, MI, USA, 20-24 August 2017 C1 - Grand Rapids, MI, USA T2 - International Beam Instrumentation Conference T3 - 6 LA - english AB - Beam Loss Monitors (BLMs) based on optical fibres have been under development for many years as an alternative solution to commonly used methods, such as ionisation chambers. Optical BLMs (oBLMs) maintain standard BLM functionality but can also be used for machine and personal protection. They can be implemented over the entire beam line providing excellent position and time resolution, while being insensitive to radiation induced damage. This contribution describes how oBLMs can also assist in the characterisation of RF cavities during commissioning and operation. It first presents the design principle of highly compact monitors and the underpinning theory for particle loss detection, before discussing data obtained in experimental tests at the electron accelerator CLARA. It then shows how a 4-channel oBLM can be applied for efficient cavity monitoring. Finally, the results are put into a broader context underlying the application potential in accelerators and light sources. PB - JACoW CP - Geneva, Switzerland SP - 446 EP - 449 KW - ion KW - cavity KW - electron KW - linac KW - vacuum DA - 2018/03 PY - 2018 SN - 978-3-95450-192-2 DO - 10.18429/JACoW-IBIC2017-WEPWC01 UR - http://jacow.org/ibic2017/papers/wepwc01.pdf ER -