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TY - CONF AU - Eichhorn, R.G. AU - Bartnik, A.C. AU - Dunham, B.M. AU - Ge, G.M. AU - Hoffstaetter, G.H. AU - Lee, H. AU - Liepe, M. AU - Markham, S.R. AU - O'Connell, T.I. AU - Quigley, P. AU - Sabol, D.M. AU - Sears, J. AU - Smith, E.N. AU - Veshcherevich, V. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Time Resolved Cryogenic Cooling Analysis of the Cornell Injector Cryomodule J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - To demonstrate key parameters of a an energy recovery linac (ERL) at Cornel, an injector based on a photo gun and an SRF cryomodule was designed and built. The goal was to demonstrate high current generation while achieving low emittances. While the emittance goal has been reached, the current achieved so far is 75 mA. Even though this is a world record, it is still below the targeted 100 mA. While ramping up the current we observed excessive heating in the fundamental power coupler which we were able to track down to insufficient cooling of the 80 K intercepts. These intercepts are cooled by a stream of parallel cryogenic flows which we found to be unbalanced. In this paper we will review the finding, describe the analysis we did, modeling of the parallel flow and the modifications made to the module to overcome the heating. PB - JACoW CP - Geneva, Switzerland SP - 2298 EP - 2301 KW - HOM KW - cryogenics KW - cryomodule KW - simulation KW - operation DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-WEPMR018 UR - http://jacow.org/ipac2016/papers/wepmr018.pdf ER -