HB2016 - List of Keywords (LLRF)

Paper	Title	Other Keywords	Page
MOAM3P30	The ESS Accelerator	linac, cavity, klystron, target	6
	H. Danared, M. Eshraqi, M. Jensen ESS, Lund, Sweden
	The European Spallation Source, ESS, is a facility for research using neutron beams that is being built in Lund. It will be the world’s most powerful such facility when it comes into full operation in the next decade. Neutrons will be released from a rotating tungsten target when it is hit by 2 GeV protons provided by a superconducting linac at an unprecedented 5 MW of average beam power, serving 22 neutron instruments covering a wide range of fundamental and applied sciences. An overview of the project will be given, with emphasis on technology. Current status, plans and challenges will be reviewed.
	Slides MOAM3P30 [21.103 MB]
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WEAM2Y01	Overview of the CSNS Linac LLRF and Operational Experiences During Beam Commissioning	controls, cavity, linac, FPGA	409
	Z.C. Mu IHEP, Beijing, People's Republic of China J. Li, M.F. Liu, L.Y. Rong, M.L. Wan, B. Wang, Z.X. Xie, X.A. Xu, Y. Yao, Z. Zhang, W. Zhou CSNS, Guangdong Province, People's Republic of China
	The CSNS Linac is comprised of RFQ, two Buncher cavities, four DTL accelerators and one Debuncher cavity. The RFQ accelerator is powered by two 4616 vacuum tubes, the maximum output power of each tube is 350kW. Three 25kW solid state amplifiers supply RF power for two Buncher cavities and the Debuncher cavity, repectively. The RF power sources of four DTL accelerators are four 3MW klystrons. Each RF power source owns a set of digital LLRF control system in order to realize an accelerating field stability of ±1% in amplitude and ±1° in phase. The front four LLRF control systems have been used in the beam commissioning of CSNS Linac from the end of 2015. This paper will introduce the design and the performance of the LLRF control system.
	Slides WEAM2Y01 [6.097 MB]
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THAM4X01	Investigation to Improve Efficiency and Availability in Control and Operation of Superconducting Cavity at ESS	cavity, operation, klystron, controls	474
	R. Zeng ESS, Lund, Sweden O. Troeng Lund University, Lund, Sweden
	The higher efficiency and higher availability (fault-tolerant oriented) of RF&Cavity system (with beam loading) to operate at, the more dynamic details needs to be identified, so as to have the abilities (a) to work at nonlinearities, (b) to work close to limitation, and (c) to change operation point quickly and correctly. Dynamic detail identifications rely heavily on high precision measuring and characterizing basic cavity parameters (Ql, R/Q, dynamic detuning, phase and amplitude) and system behaviours under beam-RF-cavity interactions. It is especially challenging to characterize these dynamics under varying operating points or environment. Advanced technologies in LLRF and ICS providing real time/online characterizing will be the key enablers for addressing such challenges. However, to be successful, the deployment of these technologies must be embedded within local conditions taking into account available resources, existing hardware/software structures and operation modes. Several improvement approaches will be introduced. For example, 15% or more energy efficiency improvement at ESS will be obtained by reduction of power overhead and optimization of operation.
	Slides THAM4X01 [2.165 MB]
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Paper

Title

Other Keywords

Page

MOAM3P30

The ESS Accelerator

linac, cavity, klystron, target

6

H. Danared, M. Eshraqi, M. Jensen
ESS, Lund, Sweden

The European Spallation Source, ESS, is a facility for research using neutron beams that is being built in Lund. It will be the world’s most powerful such facility when it comes into full operation in the next decade. Neutrons will be released from a rotating tungsten target when it is hit by 2 GeV protons provided by a superconducting linac at an unprecedented 5 MW of average beam power, serving 22 neutron instruments covering a wide range of fundamental and applied sciences. An overview of the project will be given, with emphasis on technology. Current status, plans and challenges will be reviewed.

Slides MOAM3P30 [21.103 MB]

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEAM2Y01

Overview of the CSNS Linac LLRF and Operational Experiences During Beam Commissioning

controls, cavity, linac, FPGA

409

Z.C. Mu
IHEP, Beijing, People's Republic of China
J. Li, M.F. Liu, L.Y. Rong, M.L. Wan, B. Wang, Z.X. Xie, X.A. Xu, Y. Yao, Z. Zhang, W. Zhou
CSNS, Guangdong Province, People's Republic of China

The CSNS Linac is comprised of RFQ, two Buncher cavities, four DTL accelerators and one Debuncher cavity. The RFQ accelerator is powered by two 4616 vacuum tubes, the maximum output power of each tube is 350kW. Three 25kW solid state amplifiers supply RF power for two Buncher cavities and the Debuncher cavity, repectively. The RF power sources of four DTL accelerators are four 3MW klystrons. Each RF power source owns a set of digital LLRF control system in order to realize an accelerating field stability of ±1% in amplitude and ±1° in phase. The front four LLRF control systems have been used in the beam commissioning of CSNS Linac from the end of 2015. This paper will introduce the design and the performance of the LLRF control system.

Slides WEAM2Y01 [6.097 MB]

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAM4X01

Investigation to Improve Efficiency and Availability in Control and Operation of Superconducting Cavity at ESS

cavity, operation, klystron, controls

474

R. Zeng
ESS, Lund, Sweden
O. Troeng
Lund University, Lund, Sweden

The higher efficiency and higher availability (fault-tolerant oriented) of RF&Cavity system (with beam loading) to operate at, the more dynamic details needs to be identified, so as to have the abilities (a) to work at nonlinearities, (b) to work close to limitation, and (c) to change operation point quickly and correctly. Dynamic detail identifications rely heavily on high precision measuring and characterizing basic cavity parameters (Ql, R/Q, dynamic detuning, phase and amplitude) and system behaviours under beam-RF-cavity interactions. It is especially challenging to characterize these dynamics under varying operating points or environment. Advanced technologies in LLRF and ICS providing real time/online characterizing will be the key enablers for addressing such challenges. However, to be successful, the deployment of these technologies must be embedded within local conditions taking into account available resources, existing hardware/software structures and operation modes. Several improvement approaches will be introduced. For example, 15% or more energy efficiency improvement at ESS will be obtained by reduction of power overhead and optimization of operation.

Slides THAM4X01 [2.165 MB]

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)