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TY - CONF AU - Kwak, D.H. AU - Arutunian, S.G. AU - Chung, M. AU - Harutyunyan, G.S. AU - Lazareva, E.G. AU - Margaryan, A.V. ED - Schaa, Volker RW ED - Jansson, Andreas ED - Shea, Thomas ED - Olander, Johan TI - Double-Wire Vibrating Wire Monitor (DW-VWM) for Beam Halo Monitoring in High-intensity Accelerators J2 - Proc. of IBIC2019, Malmö, Sweden, 08-12 September 2019 CY - Malmö, Sweden T2 - International Beam Instrumentation Conferenc T3 - 8 LA - english AB - Double-Wire Vibrating Wire Monitor (DW-VWM) has been designed and manufactured to monitor the beam halo in high-intensity accelerators. Compared with the previous VWM, we increase the ratio between the aperture and wire length by using strong 5 mm x 5 mm Samarium-Cobalt magnets. In addition, we install two stainless steel vibrating wires on the same frame. The first wire is placed in the beam halo region for measurements, and the second wire, which is separated from the beam by a screen, is used to subtract background signal caused by ambient temperature shifts. The new electronics of the DW-VWM consist of two main boards: auto-generation unit which is placed near the VWM, and the frequency measurement unit which is placed in the control room (100 m distance operation was tested). Typical frequency of the VWM (at start tension about 0.7 of tensile strength) is about 8000 Hz. The temperature sensitivity is about 110 Hz/K with 0.2 mK Hz resolution. The VWM was tested in vacuum tank and the frequency corresponding to each vacuum level was analyzed. The process of oscillation excitation at different levels of vacuum was also investigated. PB - JACoW Publishing CP - Geneva, Switzerland SP - 373 EP - 376 KW - vacuum KW - experiment KW - laser KW - electron KW - operation DA - 2019/11 PY - 2019 SN - 2673-5350 SN - 978-3-95450-204-2 DO - doi:10.18429/JACoW-IBIC2019-TUPP028 UR - http://jacow.org/ibic2019/papers/tupp028.pdf ER -