SRF2009 - List of Authors (Veshcherevich, V.)

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Veshcherevich, V.

Paper	Title	Page
THPPO009	Input Coupler for Main Linac of Cornell ERL	543
	V. Veshcherevich, S.A. Belomestnykh CLASSE, Ithaca, New York
	Main linac cryomodule of the Cornell ERL consists of 7-cell cavities operating at 1300 MHz in CW mode. Each cavity has a single coaxial type input coupler with fixed coupling, Qext = 2×10⁷. The input coupler will operate at RF power up to 5 kW at full reflection. The coupler design is based on the design of TTF-III input coupler with appropriate modifications and with taking into account the Cornell experience with couplers for ERL Injector. Unlike that of the TTF-III coupler, the cold assembly of the ERL main linac input coupler does not have bellows, which makes it stiff so the antenna orientation is not changing during cool down. Mechanical flexibility, necessary to accommodate large lateral movement of the cavity inside the vacuum vessel during cool down, is achieved by using two bellows insertions both in inner and outer tubes of warm coaxial line. The inner tube of the warm coaxial line is cooled with air to improve power handling capability.
	Poster
THPPO034	Cryogenic Heat Load of the Cornell ERL Main Linac Cryomodule	638
	E.P. Chojnacki, S.S. Chapman, R.D. Ehrlich, E.N. Smith, V. Veshcherevich CLASSE, Ithaca, New York
	The proposed Cornell Energy Recovery Linac (ERL) will be a 5 GeV, 100 mA cw electron accelerator using SRF Cavities. The cryomodule design will be an extension of TTF technology. The cryogenic plant will be a significant portion of the ERL cost and an accurate estimate of the heat load is crucial to facility planning. A prototype main linac cryomodule is in the process of being designed. The configuration of the major module components is sufficiently known to allow calculation of the cryogenic heat loads to the helium cooling circuits of 1.8K, 5K, and an intermediate temperature in the vicinity of 80K. The results of ANSYS thermal modeling with nonlinear material properties will be presented along with analytic calculations to provide an itemization of the cryomodule heat loads. The optimal intermediate temperature will be shown to be just above 80K. The wall-plug power for the cryoplant will be estimated with COP’s provided by major helium-refrigeration vendors.
THPPO098	Assembly Preparations for the International ERL Cryomodule at Daresbury Laboratory	864
	P.A. McIntosh, R. Bate, C.D. Beard, S.M. Pattalwar STFC/DL/ASTeC, Daresbury, Warrington, Cheshire S.A. Belomestnykh, E.P. Chojnacki, Z.A. Conway, G.H. Hoffstaetter, P. Quigley, V. Veshcherevich CLASSE, Ithaca, New York A. Büchner, F.G. Gabriel, P. Michel FZD, Dresden M.A. Cordwell, D.M. Dykes, J. Strachan STFC/DL, Daresbury, Warrington, Cheshire J.N. Corlett, D. Li, S.M. Lidia LBNL, Berkeley, California T. Kimura, T.I. Smith Stanford University, Stanford, Califormia S.R. Koscielniak, R.E. Laxdal TRIUMF, Vancouver M. Liepe, H. Padamsee, J. Sears, V.D. Shemelin Cornell University, Ithaca, New York D. Proch, J.K. Sekutowicz DESY, Hamburg
	The collaborative development of an optimised cavity/cryomodule solution for application on ERL facilities has now progressed to final assembly and testing of the cavity string components and their subsequent cryomodule integration. This paper outlines the testing and verification processes for the various cryomodule sub-components and details the methodology utilised for final cavity string integration. The paper also highlights the modifications required to integrate this new cryomodule into the existing ALICE cryo-plant facility at Daresbury Laboratory.