The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Full, S.J. AU - Bartnik, A.C. AU - Bazarov, I.V. AU - Dobbins, J. AU - Dunham, B.M. AU - Hoffstaetter, G.H. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Trapped Ion Effects and Mitigation During High Current Operation in the Cornell DC Photoinjector J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - The Cornell high intensity photoinjector reaches a new regime of linac beam parameters where high continuous-wave electron beam currents lead to ion trapping. Above 10 mA, we have observed beam trips that limit stable machine operation to approximately 10⁻¹⁵ minutes. By applying known ion clearing methods, the machine lifetime increases to at least 24 hours of continuous operation, suggesting that trapped ions are the most likely cause of the trips. In this paper we share some of our observations ion trapping in the photoinjector, as well as experimental tests of three common ion mitigation methods: clearing electrodes, beam shaking and bunch gaps. PB - JACoW CP - Geneva, Switzerland SP - 1735 EP - 1737 KW - ion KW - radiation KW - experiment KW - linac KW - vacuum DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-TUPOR031 UR - http://jacow.org/ipac2016/papers/tupor031.pdf ER -