LINAC2014 - List of Keywords (EPICS)

Paper	Title	Other Keywords	Page
TUPP041	Beam Current Monitor System of the European Spallation Source	FPGA, electronics, linac, controls	526
	H. Hassanzadegan, M. Donna, A. Jansson, H. Kocevar, A. Nordt ESS, Lund, Sweden U. Legat Cosylab, Ljubljana, Slovenia M. Werner DESY, Hamburg, Germany
	The Beam Current Monitor system of the ESS will be primarily used for beam current and charge measurements in absolute and differential modes. Moreover, it will provide a fast input to the Beam Interlock System, initiating a trigger to shut the beam off upon high beam loss detection. As the BCM system will be needed at an early stage for Linac commissioning, it needs to work successfully under non-optimal conditions, ex. short pulse and low current beams. It is planned to install in total 20 AC Current Transformers and one Fast Current Transformer along the Linac. The FCT will have a larger bandwidth and it will be used to measure the performance of the fast chopper of the Medium Energy Beam Transport with a rise time of 10 ns. A prototype based on a commercial ACCT and EPICS-integrated MTCA.4 electronics has been set up and successfully tested with an emulated beam. The ACCT signal has been FPGA processed to compensate for the offset and droop as well as filtering and synchronization to an external trigger. This paper gives an overview of the design and test results of the prototype ACCT system with an outlook to future modifications before installation in the ESS Linac.
	Poster TUPP041 [6.113 MB]

THIOC03	Operational Experience With CW High Gradient and High QL Cryomodules	cavity, cryomodule, controls, klystron	834
	C. Hovater, T.L. Allison, R. Bachimanchi, E. Daly, M.A. Drury, G.E. Lahti, C.I. Mounts, R.M. Nelson, T. E. Plawski JLab, Newport News, Virginia, USA
	Funding: This manuscript has been authored by Jefferson Science Associates, LLC 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 MV cryomodules (80 cavities). The superconducting RF cavities are designed to operate CW at an accelerating gradient of 19.3 MV/m with a QL of 3×107. The RF system employs single cavity control using new digital LLRF controls and 13 kW klystrons. Recently, all of the new cryomodules and associated RF hardware and software have been commissioned and operated in the CEBAF accelerator. Electrons at linac currents up to 10 μA have been successfully accelerated and used for nuclear physics experiments. This paper reports on the commissioning and operation of the cryomodules and RF system.
	Slides THIOC03 [5.793 MB]

Paper

Title

Other Keywords

Page

TUPP041

Beam Current Monitor System of the European Spallation Source

FPGA, electronics, linac, controls

526

H. Hassanzadegan, M. Donna, A. Jansson, H. Kocevar, A. Nordt
ESS, Lund, Sweden
U. Legat
Cosylab, Ljubljana, Slovenia
M. Werner
DESY, Hamburg, Germany

The Beam Current Monitor system of the ESS will be primarily used for beam current and charge measurements in absolute and differential modes. Moreover, it will provide a fast input to the Beam Interlock System, initiating a trigger to shut the beam off upon high beam loss detection. As the BCM system will be needed at an early stage for Linac commissioning, it needs to work successfully under non-optimal conditions, ex. short pulse and low current beams. It is planned to install in total 20 AC Current Transformers and one Fast Current Transformer along the Linac. The FCT will have a larger bandwidth and it will be used to measure the performance of the fast chopper of the Medium Energy Beam Transport with a rise time of 10 ns. A prototype based on a commercial ACCT and EPICS-integrated MTCA.4 electronics has been set up and successfully tested with an emulated beam. The ACCT signal has been FPGA processed to compensate for the offset and droop as well as filtering and synchronization to an external trigger. This paper gives an overview of the design and test results of the prototype ACCT system with an outlook to future modifications before installation in the ESS Linac.

Poster TUPP041 [6.113 MB]

THIOC03

Operational Experience With CW High Gradient and High QL Cryomodules

cavity, cryomodule, controls, klystron

834

C. Hovater, T.L. Allison, R. Bachimanchi, E. Daly, M.A. Drury, G.E. Lahti, C.I. Mounts, R.M. Nelson, T. E. Plawski
JLab, Newport News, Virginia, USA

Funding: This manuscript has been authored by Jefferson Science Associates, LLC 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 MV cryomodules (80 cavities). The superconducting RF cavities are designed to operate CW at an accelerating gradient of 19.3 MV/m with a QL of 3×107. The RF system employs single cavity control using new digital LLRF controls and 13 kW klystrons. Recently, all of the new cryomodules and associated RF hardware and software have been commissioned and operated in the CEBAF accelerator. Electrons at linac currents up to 10 μA have been successfully accelerated and used for nuclear physics experiments. This paper reports on the commissioning and operation of the cryomodules and RF system.

Slides THIOC03 [5.793 MB]