TY - CPAPER AU - Takai, R. AU - Honda, T. AU - Nogami, T. AU - Obina, T. AU - Sagehashi, H. AU - Tanimoto, Y. AU - Tobiyama, M. TI - Design and Initial Commissioning of Beam Diagnostics for the KEK Compact ERL J2 - Proc. of IBIC2014 AB - A compact energy-recovery linac (cERL) was constructed at KEK as a test accelerator for the ERL-based light source. Standard beam monitors such as beam position monitors (BPMs), screen monitors (SCMs), and beam loss monitors (BLMs) have been developed for the cERL and used in its commissioning. For the main BPMs, we adopted the stripline type, the time response of which is improved by using a glass-sealed feedthrough. The SCMs are equipped with two types of screens and an RF shield for wake-field suppression. Optical fibers with photomultiplier tubes (PMTs), covering the entire cERL circumference, are used as the BLM. CsI scintillators with large-cathode PMTs are also prepared for detecting local beam loss. The design and some initial commissioning results of these standard monitors are described in this paper. PB - JACoW CY - Geneva, Switzerland SP - 7 EP - 11 KW - linac KW - radiation KW - electron KW - optics KW - emittance DA - 2014/10 PY - 2014 SN - 978-3-95450-141-0 UR - http://jacow.org/IBIC2014/papers/mocyb2.pdf ER -