IPAC2012 - List of Authors (Merz, W.)

Paper	Title	Page
WEPPC006	CW and LP Operation Test of XFEL-Like Cryomodule	2215
	J.K. Sekutowicz, V. Ayvazyan, M. Ebert, J. Eschke, A. Gössel, D. Kostin, I.M. Kudla, W. Merz, F. Mittag, R. Onken DESY, Hamburg, Germany W. Cichalewski, W. Jałmużna, K.P. Przygoda TUL-DMCS, Łódź, Poland K. Czuba, L. Zembala Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland J. Szewiński The Andrzej Soltan Institute for Nuclear Studies, Centre Świerk, Świerk/Otwock, Poland
	A continuous improvement in the performance of superconducting TESLA cavities will make possible, from the cryogenic point of view, operation of the XFEL linac in continuous wave (cw) mode at gradients up to 7.5 MV/m and in long pulse (lp) mode up to nominal gradient of 23.4 MV/m. Each of these new operation modes will offer an additional flexibility in time structure of the photon beam, and therefore will allow for more experiments and in some cases less demanding and less expensive equipment. In this contribution we discuss results of the first RF test of these new types of operation with a XFEL-like cryomodule.

WEPPC093	Commissioning and Operation of the CEBAF 100 MeV Cryomodules	2432
	C. Hovater, T.L. Allison, R. Bachimanchi, G.K. Davis, M.A. Drury, L. Harwood, J. Hogan, A.J. Kimber, G.E. Lahti, W. Merz, R.M. Nelson, T. E. Plawski, D.J. Seidman, M. Spata, M.J. Wilson JLAB, Newport News, Virginia, USA
	Funding: This manuscript has been authored by Jefferson Science Associates, under U.S. DOE Contract No. DE-AC05-06OR23177. The Continuous Electron Beam Accelerator Facility (CEBAF) energy upgrade from 6 GeV to 12 GeV includes the installation of ten new 100 MeV cryomodules and RF systems. The superconducting RF cavities are designed to be operated CW at a maximum accelerating gradient of 19.2 MV/m. To support the higher gradients and higher QL (~ 3x107), a new RF system has been developed and is being installed to power and control the cavities. The RF system employs digital control and 13 kW klystrons. Recently, two of these cryomodules and associated RF hardware and software have been installed and commissioned in the CEBAF accelerator. Electrons at currents up to 150 μA have been successfully accelerated and used for nuclear physics experiments. This paper reports on the commissioning and operation of the RF system and cryomodules.

Paper

Title

Page

CW and LP Operation Test of XFEL-Like Cryomodule

2215

J.K. Sekutowicz, V. Ayvazyan, M. Ebert, J. Eschke, A. Gössel, D. Kostin, I.M. Kudla, W. Merz, F. Mittag, R. Onken
DESY, Hamburg, Germany
W. Cichalewski, W. Jałmużna, K.P. Przygoda
TUL-DMCS, Łódź, Poland
K. Czuba, L. Zembala
Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
J. Szewiński
The Andrzej Soltan Institute for Nuclear Studies, Centre Świerk, Świerk/Otwock, Poland

A continuous improvement in the performance of superconducting TESLA cavities will make possible, from the cryogenic point of view, operation of the XFEL linac in continuous wave (cw) mode at gradients up to 7.5 MV/m and in long pulse (lp) mode up to nominal gradient of 23.4 MV/m. Each of these new operation modes will offer an additional flexibility in time structure of the photon beam, and therefore will allow for more experiments and in some cases less demanding and less expensive equipment. In this contribution we discuss results of the first RF test of these new types of operation with a XFEL-like cryomodule.

WEPPC093

Commissioning and Operation of the CEBAF 100 MeV Cryomodules

2432

C. Hovater, T.L. Allison, R. Bachimanchi, G.K. Davis, M.A. Drury, L. Harwood, J. Hogan, A.J. Kimber, G.E. Lahti, W. Merz, R.M. Nelson, T. E. Plawski, D.J. Seidman, M. Spata, M.J. Wilson
JLAB, Newport News, Virginia, USA

Funding: This manuscript has been authored by Jefferson Science Associates, under U.S. DOE Contract No. DE-AC05-06OR23177.
The Continuous Electron Beam Accelerator Facility (CEBAF) energy upgrade from 6 GeV to 12 GeV includes the installation of ten new 100 MeV cryomodules and RF systems. The superconducting RF cavities are designed to be operated CW at a maximum accelerating gradient of 19.2 MV/m. To support the higher gradients and higher QL (~ 3x107), a new RF system has been developed and is being installed to power and control the cavities. The RF system employs digital control and 13 kW klystrons. Recently, two of these cryomodules and associated RF hardware and software have been installed and commissioned in the CEBAF accelerator. Electrons at currents up to 150 μA have been successfully accelerated and used for nuclear physics experiments. This paper reports on the commissioning and operation of the RF system and cryomodules.