ICALEPCS2013 - List of Keywords (kicker)

Paper	Title	Other Keywords	Page
MOPPC021	Configuration System of the NSLS-II Booster Control System Electronics	controls, booster, software, database	100
	P.B. Cheblakov, D. Bolkhovityanov, S.E. Karnaev, A.V. Makeev BINP SB RAS, Novosibirsk, Russia
	The National Synchrotron Light Source II is under construction at Brookhaven National Laboratory, Upton, USA. NSLS-II consists of linac, transport lines, booster synchrotron and the storage ring. The main features of booster are 1 or 2 Hz cycle and beam energy ramp from 200 MeV up to 3 GeV in 300 msec. EPICS is chosen as a base for the NSLS-II Control System. The booster control system covers all parts of the facility such as power supplies, timing system, diagnostics, vacuum system and many others. Each part includes a set of various electronic devices and a lot of parameters which shall be fully defined for the control system software. This paper considers an approach proposed for defining some equipment of the NSLS-II Booster. It provides a description of different entities of the facility in a uniform way. This information is used to generate configuration files for EPICS IOCs. The main goal of this approach is to put information in one place and elimination of data duplication. Also this approach simplifies configuration and modification of the description and makes it more clear and easily usable by engineers and operators.
	Poster MOPPC021 [0.240 MB]

MOPPC029	Internal Post Operation Check System for Kicker Magnet Current Waveforms Surveillance	controls, interface, operation, timing	131
	N. Magnin, E. Carlier, B. Goddard, V. Mertens, J.A. Uythoven CERN, Geneva, Switzerland
	A software framework, called Internal Post Operation Check (IPOC), has been developed to acquire and analyse kicker magnet current waveforms. It was initially aimed at performing the surveillance of LHC beam dumping system (LBDS) extraction and dilution kicker current waveforms and was subsequently also deployed on various other kicker systems at CERN. It has been implemented using the Front-End Software Architecture (FESA) framework, and uses many CERN control services. It provides a common interface to various off-the-shelf digitiser cards, allowing a transparent integration of new digitiser types into the system. The waveform analysis algorithms are provided as external plug-in libraries, leaving their specific implementation to the kicker system experts. The general architecture of the IPOC system is presented in this paper, along with its integration within the control environment at CERN. Some application examples are provided, including the surveillance of the LBDS kicker currents and trigger synchronisation, and a closed-loop configuration to guarantee constant switching characteristics of high voltage thyratron switches.
	Poster MOPPC029 [0.435 MB]

MOPPC075	A Monte Carlo Simulation Approach to the Reliability Modeling of the Beam Permit System of Relativistic Heavy Ion Collider (RHIC) at BNL	simulation, distributed, collider, electron	265
	P. Chitnis, T.G. Robertazzi Stony Brook University, Stony Brook, New York, USA K.A. Brown BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The RHIC Beam Permit System (BPS) monitors the health of RHIC subsystems and takes active decisions regarding beam-abort and magnet power dump, upon a subsystem fault. The reliability of BPS directly impacts the RHIC downtime, and hence its availability. This work assesses the probability of BPS failures that could lead to substantial downtime. A fail-safe condition imparts downtime to restart the machine, while a failure to respond to an actual fault can cause potential machine damage and impose significant downtime. This paper illustrates a modular multistate reliability model of the BPS, with modules having exponential lifetime distributions. The model is based on the Competing Risks Theory with Crude Lifetimes, where multiple failure modes compete against each other to cause a final failure, and simultaneously influence each other. It is also dynamic in nature as the number of modules varies based on the fault trigger location. The model is implemented as a Monte Carlo simulation in Java, and analytically validated. The eRHIC BPS will be an extension of RHIC BPS. This analysis will facilitate building a knowledge base rendering intelligent decision support for eRHIC BPS design.
	Poster MOPPC075 [0.985 MB]

MOPPC076	Quantitative Fault Tree Analysis of the Beam Permit System Elements of Relativistic Heavy Ion Collider (RHIC) at BNL	operation, simulation, collider, interface	269
	P. Chitnis, T.G. Robertazzi Stony Brook University, Stony Brook, New York, USA K.A. Brown, C. Theisen BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The RHIC Beam Permit System (BPS) plays a key role in safeguarding against the anomalies developing in the collider during a run. The BPS collects RHIC subsystem statuses to allow the beam entry and its existence in the machine. The building blocks of BPS are Permit Module (PM) and Abort Kicker Module (AKM), which incorporate various electronic boards based on VME specification. This paper presents a quantitative Fault Tree Analysis (FTA) of the PM and AKM, yielding the hazard rates of three top failures that are potential enough to cause a significant downtime of the machine. The FTA helps tracing down the top failure of the module to a component level failure (such as an IC or resistor). The fault trees are constructed for all module variants and are probabilistically evaluated using an analytical solution approach. The component failure rates are calculated using manufacturer datasheets and MIL-HDBK-217F. The apportionment of failure modes for components is calculated using FMD-97. The aim of this work is to understand the importance of individual components of the RHIC BPS regarding its reliable operation, and evaluate their impact on the operation of BPS.
	Poster MOPPC076 [0.626 MB]

TUCOCA01	XFEL Machine Protection System (MPS) Based on uTCA	linac, operation, FPGA, undulator	906
	S. Karstensen, M.E. Castro Carballo, J.M. Jäger, M. Staack DESY, Hamburg, Germany
	The European X-Ray Free Electron Laser (XFEL) linear accelerator will provide an electron beam with energies of up to 17.5 GeV and will use it to generate extremely brilliant pulses of spatially coherent xrays. With a designated average beam power of up to 600 kW and beam spot sizes down to few micrometers, the machine will hold a serious damage potential. To ensure safe operation of the accelerator it is necessary to detect dangerous situations by closely monitoring beam losses and the status of critical components. This is the task of the uTCA* based machine protection system (MPS). Many design features of the system have been influenced by experience from existing facilities, particularly the Free Electron Laser in Hamburg (FLASH), which is a kind of 1:10 prototype for the XFEL. A high flexibility of the MPS is essential to guarantee a minimum downtime of the accelerator. The MPS is embedded in the DOOCS** control system. * uTCA: Micro Telecommunications Computing Architecture ** DOOCS: Distributed Object Oriented Control System
	Slides TUCOCA01 [2.255 MB]

TUCOCA03	Machine Protection Issues for eRHIC	electron, collider, booster, radiation	914
	K.A. Brown, P. Chitnis, C. Theisen, G. Wang BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The eRHIC electron beams will be damaging both directly and as a result of synchrotron radiation. The machine protection and abort systems will be designed to prevent any equipment damage from the electron beams. In this paper we will review the requirements for the machine protection systems and the plans we have put into place to better evaluate the failure probabilities, beam abort systems designs, and overall machine protection systems designs. The machine protection systems will include a beam permit system that has inputs from loss monitors, power supplies, superconducting RF monitors, vacuum chamber heating monitors, water temperature, quench detectors, access controls systems, vacuum monitors, and longer term beam lifetime or slow loss monitors. There are three systems associated with the machine protection and beam abort systems; the beam permit link, the abort kicker systems, and the beam dumps. We describe the requirements for these systems and present our current plans for how to meet the requirements.
	Slides TUCOCA03 [2.012 MB]

THPPC060	A PXI-Based Low Level Control for the Fast Pulsed Magnets in the CERN PS Complex	controls, FPGA, timing, monitoring	1205
	J. Schipper, E. Carlier, T. Fowler, T. Gharsa CERN, Geneva, Switzerland
	Fast pulsed magnet (kicker) systems are used for beam injection and extraction in the CERN PS complex. A novel approach, based on off-the-shelf PXI components, has been used for the consolidation of the low level part of their control system. Typical functionalities required like interlocking, equipment state control, thyratron drift stabilisation and protection, short circuit detection in magnets and transmission lines, pulsed signal acquisition and fine timing have been successfully integrated within a PXI controller. The controller comprises a National Instruments NI PXI-810x RT real time processor, a multifunctional RIO module including a Virtex-5 LX30 FPGA, a 1 GS/s digitiser and a digital delay module with 1 ns resolution. National Instruments LabVIEW development tools have been used to develop the embedded real time software as well as FPGA configuration and expert application programs. The integration within the CERN controls environment is performed using the Rapid Application Development Environment (RADE) software tools, developed at CERN.
	Poster THPPC060 [0.887 MB]

THPPC105	The LHC Injection Sequencer	injection, operation, database, controls	1307
	D. Jacquet, J.C. Bau, I. Kozsar CERN, Geneva, Switzerland
	The LHC is the largest accelerator at CERN. The 2 beams of the LHC are colliding in four experiments, each beam can be composed up to 2808 high intensity bunches. The beams are produced at the LINAC, is shaped and accelerated in the LHC injectors to 450GeV. The injected beam contains up to 288 high intensity bunches, corresponding to a stored energy of 2MJ. To build for each LHC ring the complete bunch scheme that ensure a desired number of collision for each experiment, several injections are needed from the SPS to the LHC. The type of beam that is needed and the longitudinal emplacement of each injection have to be defined with care. This process is controlled by the injection sequencer and it orchestrates the beam requests. Predefined filling schemes stored in a database are used to indicate the number of injection, the type of beam and the longitudinal place of each. The injection sequencer sends the corresponding beam requests to the CBCM, the central timing manager which in turn synchronizes the beam production in the injectors. This paper will describe how the injection sequencer is implemented and its interaction with the other systems involved in the injection process.
	Poster THPPC105 [0.606 MB]

THPPC128	The Feedback System for Damping Coherent Betatron and Synchrotron Oscillations of Electron Beam at Dedicated Synchrotron Radiation Source SIBERIA-2.	feedback, synchrotron, electron, radiation	1359
	A.S. Smygacheva, Y.A. Fomin, V. Korchuganov, N.I. Moseiko, Yu.F. Tarasov, A.G. Valentinov NRC, Moscow, Russia R. Cerne, R. Hrovatin, D.T. Tinta I-Tech, Solkan, Slovenia
	The description of feedback system for dumping coherent betatron and synchrotron oscillations of the electron beam which is realized at present time at the dedicated synchrotron radiation storage ring SIBERIA-2 in Kurchatov Institute is presented in the paper. The installation of new feedback system into the main ring SIBERIA-2 will allow to improve the quality of synchrotron radiation beams. In particular, at the beam injection energy (450 MeV) with the help of new feedback system we can increase maximum stored beam current and at operation beam energy (2.5 GeV) the system will provide additional electron beam spatial stabilization. The paper describes new feedback system description, the principle of operation and its technical characteristics. As well, we describe in detail the design of kickers (especially for longitudinal plane) used into the system as they are one of the important feedback system components.

Paper

Title

Other Keywords

Page

MOPPC021

Configuration System of the NSLS-II Booster Control System Electronics

controls, booster, software, database

100

P.B. Cheblakov, D. Bolkhovityanov, S.E. Karnaev, A.V. Makeev
BINP SB RAS, Novosibirsk, Russia

The National Synchrotron Light Source II is under construction at Brookhaven National Laboratory, Upton, USA. NSLS-II consists of linac, transport lines, booster synchrotron and the storage ring. The main features of booster are 1 or 2 Hz cycle and beam energy ramp from 200 MeV up to 3 GeV in 300 msec. EPICS is chosen as a base for the NSLS-II Control System. The booster control system covers all parts of the facility such as power supplies, timing system, diagnostics, vacuum system and many others. Each part includes a set of various electronic devices and a lot of parameters which shall be fully defined for the control system software. This paper considers an approach proposed for defining some equipment of the NSLS-II Booster. It provides a description of different entities of the facility in a uniform way. This information is used to generate configuration files for EPICS IOCs. The main goal of this approach is to put information in one place and elimination of data duplication. Also this approach simplifies configuration and modification of the description and makes it more clear and easily usable by engineers and operators.

Poster MOPPC021 [0.240 MB]

MOPPC029

Internal Post Operation Check System for Kicker Magnet Current Waveforms Surveillance

controls, interface, operation, timing

131

N. Magnin, E. Carlier, B. Goddard, V. Mertens, J.A. Uythoven
CERN, Geneva, Switzerland

A software framework, called Internal Post Operation Check (IPOC), has been developed to acquire and analyse kicker magnet current waveforms. It was initially aimed at performing the surveillance of LHC beam dumping system (LBDS) extraction and dilution kicker current waveforms and was subsequently also deployed on various other kicker systems at CERN. It has been implemented using the Front-End Software Architecture (FESA) framework, and uses many CERN control services. It provides a common interface to various off-the-shelf digitiser cards, allowing a transparent integration of new digitiser types into the system. The waveform analysis algorithms are provided as external plug-in libraries, leaving their specific implementation to the kicker system experts. The general architecture of the IPOC system is presented in this paper, along with its integration within the control environment at CERN. Some application examples are provided, including the surveillance of the LBDS kicker currents and trigger synchronisation, and a closed-loop configuration to guarantee constant switching characteristics of high voltage thyratron switches.

Poster MOPPC029 [0.435 MB]

MOPPC075

A Monte Carlo Simulation Approach to the Reliability Modeling of the Beam Permit System of Relativistic Heavy Ion Collider (RHIC) at BNL

simulation, distributed, collider, electron

265

P. Chitnis, T.G. Robertazzi
Stony Brook University, Stony Brook, New York, USA
K.A. Brown
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The RHIC Beam Permit System (BPS) monitors the health of RHIC subsystems and takes active decisions regarding beam-abort and magnet power dump, upon a subsystem fault. The reliability of BPS directly impacts the RHIC downtime, and hence its availability. This work assesses the probability of BPS failures that could lead to substantial downtime. A fail-safe condition imparts downtime to restart the machine, while a failure to respond to an actual fault can cause potential machine damage and impose significant downtime. This paper illustrates a modular multistate reliability model of the BPS, with modules having exponential lifetime distributions. The model is based on the Competing Risks Theory with Crude Lifetimes, where multiple failure modes compete against each other to cause a final failure, and simultaneously influence each other. It is also dynamic in nature as the number of modules varies based on the fault trigger location. The model is implemented as a Monte Carlo simulation in Java, and analytically validated. The eRHIC BPS will be an extension of RHIC BPS. This analysis will facilitate building a knowledge base rendering intelligent decision support for eRHIC BPS design.

Poster MOPPC075 [0.985 MB]

MOPPC076

Quantitative Fault Tree Analysis of the Beam Permit System Elements of Relativistic Heavy Ion Collider (RHIC) at BNL

operation, simulation, collider, interface

269

P. Chitnis, T.G. Robertazzi
Stony Brook University, Stony Brook, New York, USA
K.A. Brown, C. Theisen
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The RHIC Beam Permit System (BPS) plays a key role in safeguarding against the anomalies developing in the collider during a run. The BPS collects RHIC subsystem statuses to allow the beam entry and its existence in the machine. The building blocks of BPS are Permit Module (PM) and Abort Kicker Module (AKM), which incorporate various electronic boards based on VME specification. This paper presents a quantitative Fault Tree Analysis (FTA) of the PM and AKM, yielding the hazard rates of three top failures that are potential enough to cause a significant downtime of the machine. The FTA helps tracing down the top failure of the module to a component level failure (such as an IC or resistor). The fault trees are constructed for all module variants and are probabilistically evaluated using an analytical solution approach. The component failure rates are calculated using manufacturer datasheets and MIL-HDBK-217F. The apportionment of failure modes for components is calculated using FMD-97. The aim of this work is to understand the importance of individual components of the RHIC BPS regarding its reliable operation, and evaluate their impact on the operation of BPS.

Poster MOPPC076 [0.626 MB]

TUCOCA01

XFEL Machine Protection System (MPS) Based on uTCA

linac, operation, FPGA, undulator

906

S. Karstensen, M.E. Castro Carballo, J.M. Jäger, M. Staack
DESY, Hamburg, Germany

The European X-Ray Free Electron Laser (XFEL) linear accelerator will provide an electron beam with energies of up to 17.5 GeV and will use it to generate extremely brilliant pulses of spatially coherent xrays. With a designated average beam power of up to 600 kW and beam spot sizes down to few micrometers, the machine will hold a serious damage potential. To ensure safe operation of the accelerator it is necessary to detect dangerous situations by closely monitoring beam losses and the status of critical components. This is the task of the uTCA* based machine protection system (MPS). Many design features of the system have been influenced by experience from existing facilities, particularly the Free Electron Laser in Hamburg (FLASH), which is a kind of 1:10 prototype for the XFEL. A high flexibility of the MPS is essential to guarantee a minimum downtime of the accelerator. The MPS is embedded in the DOOCS** control system.
* uTCA: Micro Telecommunications Computing Architecture
** DOOCS: Distributed Object Oriented Control System

Slides TUCOCA01 [2.255 MB]

TUCOCA03

Machine Protection Issues for eRHIC

electron, collider, booster, radiation

914

K.A. Brown, P. Chitnis, C. Theisen, G. Wang
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The eRHIC electron beams will be damaging both directly and as a result of synchrotron radiation. The machine protection and abort systems will be designed to prevent any equipment damage from the electron beams. In this paper we will review the requirements for the machine protection systems and the plans we have put into place to better evaluate the failure probabilities, beam abort systems designs, and overall machine protection systems designs. The machine protection systems will include a beam permit system that has inputs from loss monitors, power supplies, superconducting RF monitors, vacuum chamber heating monitors, water temperature, quench detectors, access controls systems, vacuum monitors, and longer term beam lifetime or slow loss monitors. There are three systems associated with the machine protection and beam abort systems; the beam permit link, the abort kicker systems, and the beam dumps. We describe the requirements for these systems and present our current plans for how to meet the requirements.

Slides TUCOCA03 [2.012 MB]

THPPC060

A PXI-Based Low Level Control for the Fast Pulsed Magnets in the CERN PS Complex

controls, FPGA, timing, monitoring

1205

J. Schipper, E. Carlier, T. Fowler, T. Gharsa
CERN, Geneva, Switzerland

Fast pulsed magnet (kicker) systems are used for beam injection and extraction in the CERN PS complex. A novel approach, based on off-the-shelf PXI components, has been used for the consolidation of the low level part of their control system. Typical functionalities required like interlocking, equipment state control, thyratron drift stabilisation and protection, short circuit detection in magnets and transmission lines, pulsed signal acquisition and fine timing have been successfully integrated within a PXI controller. The controller comprises a National Instruments NI PXI-810x RT real time processor, a multifunctional RIO module including a Virtex-5 LX30 FPGA, a 1 GS/s digitiser and a digital delay module with 1 ns resolution. National Instruments LabVIEW development tools have been used to develop the embedded real time software as well as FPGA configuration and expert application programs. The integration within the CERN controls environment is performed using the Rapid Application Development Environment (RADE) software tools, developed at CERN.

Poster THPPC060 [0.887 MB]

THPPC105

The LHC Injection Sequencer

injection, operation, database, controls

1307

D. Jacquet, J.C. Bau, I. Kozsar
CERN, Geneva, Switzerland

The LHC is the largest accelerator at CERN. The 2 beams of the LHC are colliding in four experiments, each beam can be composed up to 2808 high intensity bunches. The beams are produced at the LINAC, is shaped and accelerated in the LHC injectors to 450GeV. The injected beam contains up to 288 high intensity bunches, corresponding to a stored energy of 2MJ. To build for each LHC ring the complete bunch scheme that ensure a desired number of collision for each experiment, several injections are needed from the SPS to the LHC. The type of beam that is needed and the longitudinal emplacement of each injection have to be defined with care. This process is controlled by the injection sequencer and it orchestrates the beam requests. Predefined filling schemes stored in a database are used to indicate the number of injection, the type of beam and the longitudinal place of each. The injection sequencer sends the corresponding beam requests to the CBCM, the central timing manager which in turn synchronizes the beam production in the injectors. This paper will describe how the injection sequencer is implemented and its interaction with the other systems involved in the injection process.

Poster THPPC105 [0.606 MB]

THPPC128

The Feedback System for Damping Coherent Betatron and Synchrotron Oscillations of Electron Beam at Dedicated Synchrotron Radiation Source SIBERIA-2.

feedback, synchrotron, electron, radiation

1359

A.S. Smygacheva, Y.A. Fomin, V. Korchuganov, N.I. Moseiko, Yu.F. Tarasov, A.G. Valentinov
NRC, Moscow, Russia
R. Cerne, R. Hrovatin, D.T. Tinta
I-Tech, Solkan, Slovenia

The description of feedback system for dumping coherent betatron and synchrotron oscillations of the electron beam which is realized at present time at the dedicated synchrotron radiation storage ring SIBERIA-2 in Kurchatov Institute is presented in the paper. The installation of new feedback system into the main ring SIBERIA-2 will allow to improve the quality of synchrotron radiation beams. In particular, at the beam injection energy (450 MeV) with the help of new feedback system we can increase maximum stored beam current and at operation beam energy (2.5 GeV) the system will provide additional electron beam spatial stabilization. The paper describes new feedback system description, the principle of operation and its technical characteristics. As well, we describe in detail the design of kickers (especially for longitudinal plane) used into the system as they are one of the important feedback system components.