SRF2011 - List of Authors (Yakovlev, V.P.)

Paper	Title	Page
TUPO006	High Power Couplers for the Project X Linac	361
	S. Kazakov, M.S. Champion, S. Cheban, T.N. Khabiboulline, M. Kramp, Y. Orlov, O. Pronitchev, V.P. Yakovlev Fermilab, Batavia, USA
	Project X, a multi-megawatt proton source under development at Fermi National Accelerator Laboratory. [1]. The key element of the project is a superconducting (SC) 3GV continuous wave (CW) proton linac. The linac includes 5 types of SC accelerating cavities of two frequencies.(325 and 650MHz) The cavities consume up to 30 kW average RF power and need proper main couplers. Requirements and approach to the coupler design are discussed in the report. Results of electrodynamics and thermal simulations are presented. New cost effective schemes are described.

MOPO024	Design of Single Spoke Resonators for Project X	122
	L. Ristori, S. Barbanotti, P. Berrutti, M.S. Champion, M.H. Foley, C.M. Ginsburg, I.G. Gonin, C.J. Grimm, T.N. Khabiboulline, D. Passarelli, N. Solyak, A. Vostrikov, V.P. Yakovlev Fermilab, Batavia, USA
	Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. Project X is based on a 3 GeV CW superconducting linac and is currently in the R&D phase awaiting CD-0 approval. The low-energy section of the Project X H⁻ linac (starting at 2.5 MeV) includes three types of super-conducting single spoke cavities operating at 325 MHz. The first three cryomodules will each house 7 SSR0 cavities at β = 0.11. The following two cryomodules will each contain 10 SSR1 cavities each at β = 0.21. The last four cryomodules will contain 11 SSR2 cavities each at β = 0.4. Single spoke cavities were selected for the linac in virtue of their higher r/Q values compared to standard Half Wave Resonator. Quarter Wave Resonators were not considered for such a high frequency. In this paper we present the decisions and analyses that lead to the final design of SSR0. Electro-magnetic and mechanical finite element analyses were performed with the purpose of optimizing the electro-magnetic design, minimizing frequency shifts due to helium bath pressure fluctuations and providing a pressure rating for the resonators that allow their use in the cryomodules.

THPO024	Quench Dynamics in SRF Cavities	764
	Y.B. Maximenko MIPT, Dolgoprudniy, Moscow Region, Russia D.A. Sergatskov, V.P. Yakovlev Fermilab, Batavia, USA
	Funding: The work herein has been performed at Fermilab, which is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. We have developed a time-dependent model of quench process in an SRF cavity. We discuss peculiarities of the numerical solution and the results of simulation.

Paper

Title

Page

High Power Couplers for the Project X Linac

361

S. Kazakov, M.S. Champion, S. Cheban, T.N. Khabiboulline, M. Kramp, Y. Orlov, O. Pronitchev, V.P. Yakovlev
Fermilab, Batavia, USA

Project X, a multi-megawatt proton source under development at Fermi National Accelerator Laboratory. [1]. The key element of the project is a superconducting (SC) 3GV continuous wave (CW) proton linac. The linac includes 5 types of SC accelerating cavities of two frequencies.(325 and 650MHz) The cavities consume up to 30 kW average RF power and need proper main couplers. Requirements and approach to the coupler design are discussed in the report. Results of electrodynamics and thermal simulations are presented. New cost effective schemes are described.

MOPO024

Design of Single Spoke Resonators for Project X

122

L. Ristori, S. Barbanotti, P. Berrutti, M.S. Champion, M.H. Foley, C.M. Ginsburg, I.G. Gonin, C.J. Grimm, T.N. Khabiboulline, D. Passarelli, N. Solyak, A. Vostrikov, V.P. Yakovlev
Fermilab, Batavia, USA

Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
Project X is based on a 3 GeV CW superconducting linac and is currently in the R&D phase awaiting CD-0 approval. The low-energy section of the Project X H⁻ linac (starting at 2.5 MeV) includes three types of super-conducting single spoke cavities operating at 325 MHz. The first three cryomodules will each house 7 SSR0 cavities at β = 0.11. The following two cryomodules will each contain 10 SSR1 cavities each at β = 0.21. The last four cryomodules will contain 11 SSR2 cavities each at β = 0.4. Single spoke cavities were selected for the linac in virtue of their higher r/Q values compared to standard Half Wave Resonator. Quarter Wave Resonators were not considered for such a high frequency. In this paper we present the decisions and analyses that lead to the final design of SSR0. Electro-magnetic and mechanical finite element analyses were performed with the purpose of optimizing the electro-magnetic design, minimizing frequency shifts due to helium bath pressure fluctuations and providing a pressure rating for the resonators that allow their use in the cryomodules.

THPO024

Quench Dynamics in SRF Cavities

764

Y.B. Maximenko
MIPT, Dolgoprudniy, Moscow Region, Russia
D.A. Sergatskov, V.P. Yakovlev
Fermilab, Batavia, USA

Funding: The work herein has been performed at Fermilab, which is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
We have developed a time-dependent model of quench process in an SRF cavity. We discuss peculiarities of the numerical solution and the results of simulation.