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TY - CONF AU - Khojoyan, M. AU - Cauchois, A. AU - Prudent, J. AU - Specka, A. ED - Schaa, Volker RW TI - Design of a Compact Permanent Magnet Spectrometer for CILEX/APOLLON J2 - Proc. of IBIC2018, Shanghai, China, 09-13 September 2018 CY - Shanghai, China T2 - International Beam Instrumentation Conference T3 - 7 LA - english AB - Laser wakefield acceleration experiments make extensive use of small permanent magnets or magnet assemblies for analyzing and focusing electron beams produced in plasma accelerators. This choice is motivated by the ease of operation inside vacuum chambers, absence of power-supplies and feedthroughs, and potentially lower cost. Indeed, in these experiments space is at premium, and compactness is frequently required. At the same time, these magnets have to have a large angular acceptance for the divergent laser and electron beams which imposes constraint of the gap size. We will present the optimized design and characterization of a 100 mm long, 2.1 Tesla permanent magnet dipole. Furthermore, we will present the implementation of this magnet in a spectrometer that will measure the energy spectrum of electrons of [60-2000] MeV with a few percent resolution in the CILEX/APOLLON 10PW laser facility in France. PB - JACoW Publishing CP - Geneva, Switzerland SP - 61 EP - 65 KW - electron KW - permanent-magnet KW - dipole KW - laser KW - induction DA - 2019/01 PY - 2019 SN - 978-3-95450-201-1 DO - DOI: 10.18429/JACoW-IBIC2018-MOPA16 UR - http://jacow.org/ibic2018/papers/mopa16.pdf ER -