LINAC2014 - List of Authors (Darve, C.)

Paper	Title	Page
TUPP040	Preliminary Functional Analysis of ESS Superconducting Radio-Frequency Linac	522
	C. Darve, N. Elias, J. Fydrych, D.P. Piso ESS, Lund, Sweden
	The European Spallation Source (ESS) is one of Europe's largest planned research infrastructures. The collaborative project is funded by a collaboration of 17 European countries and is under design and construction in Lund, Sweden. Three families of Superconducting Radio-Frequency (SRF) cavities are being prototyped, counting the spoke resonators with a geometric beta of 0.5, medium-beta elliptical cavities (βg=0.67) and high-beta elliptical cavities (bg=0.86). The 5 MW, 2.86 ms long pulse proton accelerator has a repetition frequency of 14 Hz (4 % duty cycle), and a beam current of 62.5 mA. The cavities and power couplers are assembled into cryomodules, which are operating using RF sources, cryogenic and water coolings. This document describes the process of the ESS SRF cryomodule operation while refereeing to operational modes.

THPP077	Fast Tuner Performance for a Double Spoke Cavity	1034
	N. Gandolfo, S. Bousson, S. Brault, P. Duchesne, P. Duthil, G. Olry, D. Reynet IPN, Orsay, France C. Darve, M. Lindroos ESS, Lund, Sweden
	IPN Orsay is developing the low-beta double Spoke cavities cryomodule for the ESS. In order to compensate resonant frequency variations of each cavity during operation, a deformation tuner has been studied and two of them have been built. The typical perturbations are coming from LHe saturated bath pressure variations as well as microphonics and Lorentz force detuning (LFD). In this paper, the tuner performance of the double Spoke cavity is presented.

Paper

Title

Page

Preliminary Functional Analysis of ESS Superconducting Radio-Frequency Linac

522

C. Darve, N. Elias, J. Fydrych, D.P. Piso
ESS, Lund, Sweden

The European Spallation Source (ESS) is one of Europe's largest planned research infrastructures. The collaborative project is funded by a collaboration of 17 European countries and is under design and construction in Lund, Sweden. Three families of Superconducting Radio-Frequency (SRF) cavities are being prototyped, counting the spoke resonators with a geometric beta of 0.5, medium-beta elliptical cavities (βg=0.67) and high-beta elliptical cavities (bg=0.86). The 5 MW, 2.86 ms long pulse proton accelerator has a repetition frequency of 14 Hz (4 % duty cycle), and a beam current of 62.5 mA. The cavities and power couplers are assembled into cryomodules, which are operating using RF sources, cryogenic and water coolings. This document describes the process of the ESS SRF cryomodule operation while refereeing to operational modes.

THPP077

Fast Tuner Performance for a Double Spoke Cavity

1034

N. Gandolfo, S. Bousson, S. Brault, P. Duchesne, P. Duthil, G. Olry, D. Reynet
IPN, Orsay, France
C. Darve, M. Lindroos
ESS, Lund, Sweden

IPN Orsay is developing the low-beta double Spoke cavities cryomodule for the ESS. In order to compensate resonant frequency variations of each cavity during operation, a deformation tuner has been studied and two of them have been built. The typical perturbations are coming from LHe saturated bath pressure variations as well as microphonics and Lorentz force detuning (LFD). In this paper, the tuner performance of the double Spoke cavity is presented.