Keyword: timing
Paper Title Other Keywords Page
MOB3O04 The Construction Status of the SuperKEKB Control System controls, EPICS, operation, interface 1
  • M. Iwasaki, A. Akiyama, K. Furukawa, H. Kaji, T. Naito, T.T. Nakamura, J.-I. Odagiri, S. Sasaki
    KEK, Ibaraki, Japan
  • T. Aoyama, M. Fujita, T. Nakamura, K. Yoshii
    Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
  • K. Asano, M. Hirose
    KIS, Ibaraki, Japan
  • Y. Iitsuka, N. Yoshifuji
    EJIT, Hitachi, Ibaraki, Japan
  SuperKEKB is the upgrade of KEKB, the asymmetric energy electron-positron collider for the B-factory experiment in Japan. It aims at the 40-times higher luminosity than the world record by KEKB. The KEKB control system has been built based on EPICS at the equipment layer and scripting languages at the operation layer. The SuperKEKB control system continues to employ these frameworks while we implement new features for the successful operation at such a high luminosity. As the commissioning of the SuperKEKB main storage rings is scheduled to start in 2016, the construction of the control system is now in the final phase. We have upgraded and reinforced the network system, server computers and operator consoles. Most of the VME-based IOCs (I/O Controllers), which has been widely used in KEKB, are upgraded while the PLC-based IOCs are also widely introduced. The new timing system has been developed in order to handle the complicated injection scheme of the SuperKEKB accelerator complex efficiently. The new beam abort trigger system and the new beam gate control system have been developed, and so on. The construction status of the SuperKEKB accelerator control system will be presented.  
slides icon Slides MOB3O04 [11.615 MB]  
MOM306 Status of the PAL-XFEL Control System controls, network, undulator, electron 1
  • C. Kim, S.Y. Baek, H.-S. Kang, J.H. Kim, K.W. Kim, I.S. Ko, G. Mun, B.R. Park
    PAL, Pohang, Kyungbuk, Republic of Korea
  Pohang accelerator laboratory (PAL) started an x-ray free electron laser project (PAL-XFEL) in 2011. In the PAL-XFEL, an electron beam with 200 pC will be generated from a photocathode RF gun and will be accelerated to 10 GeV by using a linear accelerator. The electron beam will pass through undulator section to produce hard x-ray radiation. In 2015, we will finish the installation and will start a commissioning of the PAL-XFEL. In this paper, we introduce the PAL-XFEL and explain present status of it. Details of the control system will be described including a network system, a timing system, hardware control systems and a machine interlock system.  
slides icon Slides MOM306 [1.838 MB]  
MOPGF032 Installation of a Hot-Swappable Spare Injector Laser System for the SLAC Linac Coherent Light Source laser, controls, electron, cathode 1
  • S.C. Alverson, G.W. Brown, F.-J. Decker, S. Gilevich, S. Vetter
    SLAC, Menlo Park, California, USA
  LCLS is a facility for generation of very short duration, highly intense x-ray pulses which requires an extremely reliable photocathode electron source. In order to maintain high up-time (>95%) for the experimenters, operations rely on a maintenance program for active laser components as well as on built-in redundancy in case of failure. To accomplish this, a duplicate laser system was installed, allowing for quick swap between the active system and the spare in the event of a malfunction or for planned maintenance. As an added bonus, this redundant system provides additional possibilities for science as both laser systems can also be run to the cathode simultaneously to create multiple particle bunches. Diagnostics were put in place to maintain both special and temporal overlap and allow for the fast switching between systems by operations personnel while still remaining within the safety envelope. This was done for both the primary UV drive laser as well as the secondary IR "heater" laser. This paper describes the installation challenges and design architecture for this backup laser system.  
poster icon Poster MOPGF032 [1.773 MB]  
MOPGF033 New Developments on EPICS Drivers, Clients and Tools at SESAME EPICS, controls, Linux, Ethernet 1
  • I. Saleh, Y.S. Dabain, A. Ismail
    SESAME, Allan, Jordan
  SESAME is a 2.5 GeV synchrotron light source under construction in Allan, Jordan. The control system of SESAME is based on EPICS and CSS. Various developments in EPICS drivers, clients, software tools and hardware have been done. This paper will present some of the main achievements: new linux-x86 EPICS drivers and soft IOCS developed for the Micro-Research Finland event timing system replacing the VME/VxWorks-based drivers; new EPICS drivers and clients developed for the Basler GigE cameras; an IOC deployment and management driver developed to monitor the numerous virtual machines running the soft IOCs, and to ease deployment of updates to these IOCs; an automated EPICS checking tool developed to aid in the review, validation and application of the in-house rules for all record databases; a new EPICS record type (mbbi2) developed to provide alarm features missing from the multibit binary records found in the base distribution of EPICS; and a test of feasibility for replacing serial terminal servers with low-cost computers.  
poster icon Poster MOPGF033 [0.954 MB]  
MOPGF090 Control of Fast-Pulsed Power Converters at CERN Using a Function Generator/Controller controls, network, software, Ethernet 1
  • R. Murillo-Garcia, Q. King, M. Magrans de Abril
    CERN, Geneva, Switzerland
  The electrical power converter group at CERN is responsible for the design of fast-pulsed power converters. These generate a flat-top pulse of the order of a few milliseconds. Control of these power converters is orchestrated by an embedded computer, known as the Function Generator/Controller (FGC). The FGC is the main component in the so-called RegFGC3 chassis, which also houses a variety of purpose-built cards. Ensuring the generation of the pulse at a precise moment, typically when the beam passes, is paramount to the correct behaviour of the accelerator. To that end, the timing distribution and posterior handling by the FGC must be well defined. Also important is the ability to provide operational feedback, and to configure the FGC, the converter, and the pulse characteristics. This paper presents an overview of the system architecture as well as the results obtained during the commissioning of this control solution in CERN's new Linac4.  
poster icon Poster MOPGF090 [8.193 MB]  
MOPGF134 Design of Fast Machine Protection System for the C-ADS Injection I controls, FPGA, interface, network 1
  • F. Liu, J. Hu, X.S. Jiang, Q. Ye
    IHEP, People's Republic of China
  • G.H. Gong
    Tsinghua University, Beijing, People's Republic of China
  In this paper a new fast machine protection system is proposed. This system is designed for the injection Ι of C-ADS which fault reaction time requires less than 20us, and the one minute down time requires less than 7 times in a whole year. The system consist of one highly reliable control network based on a control board and some front IO sub-boards, and one nanosecond precision timing system using white rabbit protocol. The control board and front IO sub-board are redundant separately. The structure of the communication network is a combination structure of star and tree types which using the 2.5GHz optical fiber links the all nodes. This paper pioneered the use of nanosecond timing system based on the white rabbit protocol to determine the time and sequence of each system failure. Another advantage of the design is that it uses standard FMC and an easy extension structure which made the design is easy to use in a large accelerator.  
poster icon Poster MOPGF134 [0.820 MB]  
MOPGF141 Upgrade of Abort Trigger System for SuperKEKB software, controls, EPICS, FPGA 1
  • S. Sasaki, A. Akiyama, M. Iwasaki, T. Naito, T.T. Nakamura
    KEK, Ibaraki, Japan
  The beam abort system was installed in KEKB in order to protect the accelerator equipment and the Belle detector, and for radiation safety, from high current beams. For SuperKEKB, the new abort trigger system was developed. It collects more than 130 beam abort request signals and issues the beam abort trigger signal to the abort kickers. The request signals are partially aggregated in local control rooms located along the SuperKEKB ring and finally aggregated in central control room. In order to increase the system reliability, the VME-based module and the O/E module was developed, and all the abort signals between the modules are transmitted as optical signals. The VME-based module aggregates input signals and input signals are OR and latched. The E/O module converts electrical signal from abort request source to optical signal. The system also has the timestamp function to keep track of the abort signal received time. The timestamps are expected to contribute to identify the cause of the beam abort. Based on feasibility tests with a prototype module, the new module design was improved and fixed. This paper describes the details of the new abort trigger system.  
poster icon Poster MOPGF141 [0.523 MB]  
TUB3O03 The Modular Control Concept of the Neutron Scattering Experiments at the European Spallation Source ESS controls, interface, neutron, EPICS 1
  • T. Gahl, R.J. Hall-Wilton, O. Kirstein, T. Korhonen, T.S. Richter, A. Sandström, I. Sutton, J.W. Taylor
    ESS, Lund, Sweden
  The European Spallation Source (ESS) in Lund, Sweden has just entered into neutron beam line construction starting detailed design in 2015. As a collaboration of 17 European countries the majority of hardware devices will be provided in-kind. This presents numerous technical and organizational challenges for the construction and the integration of the neutron instrumentation into the facility wide infrastructure; notably the EPICS control network and the facilities absolute timing system. In this contribution we present a strategy for the modularity of the instruments hardware with well-defined standardized functionality and a minimized number of control & data interfaces. Key point of the strategy is the time stamping of all readings from the instruments control electronics extending the event mode data acquisition from detected neutron events to all metadata. This gives the control software the flexibility necessary to adapt the functionality of the instruments to the demands of each single experimental run. Examples of the advantages of that approach in classical motion control as well as in complex robotics systems and matching hardware requirements necessary, is discussed.
* S.Peggs et al., ESS Technical Design Report(ESS-2013-0001, 2013)
** T.Gahl et al., Modularity & Integration of Event Mode Data Acquisition and Instrument Control for ESS, Proc. of ICANS XXI(2015)
slides icon Slides TUB3O03 [2.111 MB]  
TUC3O02 Design, Implementation and Setup of the Fast Protection System for CSNS proton, neutron, ion-source, extraction 1
  • D.P. Jin, Y.L. Zhang, P. Zhu
    IHEP, Beijing, People's Republic of China
  Design, implementation and setup of a FPGA and RocketIO based FPS(Fast Protection System) for CSNS(China Spallation Neutron Source) is introduced. This system is a compact design with high speed serial transmission techniques. RocketIOs (or MGTs) and optical transceivers are used to transmit the interlock signals, with each link to carry 16 signals. Ground loop problems are avoided since the use of fibers. Dedicated firmware is developed for the auto-working of the serial links when both fibers are plugged in under power-on state. A real-time online heart-beat function is also implemented for each interlock signal to make sure the overall safety of the system. The whole system is under installation and will be put into use soon part by part according to the progress of the civil construction and equipment installation.  
slides icon Slides TUC3O02 [3.489 MB]  
WEC3O01 Trigger and RF Distribution Using White Rabbit FPGA, network, Ethernet, software 1
  • T. Włostowski, G. Daniluk, M.M. Lipinski, J. Serrano
    CERN, Geneva, Switzerland
  • F. Vaga
    University of Pavia, Pavia, Italy
  White Rabbit is an extension of Ethernet which allows remote synchronization of nodes with jitters of around 10ps. The technology can be used for a variety of purposes. This paper presents a fixed-latency trigger distribution system for the study of instabilities in the LHC. Fixed latency is achieved by precisely time-stamping incoming triggers, notifying other nodes via an Ethernet broadcast containing these time stamps and having these nodes produce pulses at well-defined time offsets. The same system is used to distribute the 89us LHC revolution tick. This paper also describes current efforts for distributing multiple RF signals over a WR network, using a Distributed DDS paradigm.  
slides icon Slides WEC3O01 [1.460 MB]  
WEC3O02 The Phase-Locked Loop Algorithm of the Function Generation/Controller controls, Ethernet, network, real-time 1
  • M. Magrans de Abril, Q. King, R. Murillo-Garcia
    CERN, Geneva, Switzerland
  This paper describes the phase-locked loop algorithms that are used by the real-time power converter controllers at CERN. The algorithms allow the recovery of the machine time and events received by an embedded controller through WorldFIP or Ethernet-based fieldbuses. During normal operation, the algorithm provides less than 10 μs of time precision and 0.5 μs of clock jitter for the WorldFIP case, and less than 2.5 μs of time precision and 40 ns of clock jitter for the Ethernet case.  
slides icon Slides WEC3O02 [1.886 MB]  
WEC3O04 New Event Timing System for Damping Ring at SuperKEKB linac, operation, positron, damping 1
  • H. Kaji, K. Furukawa, M. Iwasaki, T. Kobayashi, F. Miyahara, T.T. Nakamura, M. Satoh, M. Suetake, M. Tobiyama
    KEK, Ibaraki, Japan
  • Y. Iitsuka
    EJIT, Hitachi, Ibaraki, Japan
  • T. Kudou, S. Kusano
    Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
  • M. Liu, C.X. Yin
    SINAP, Shanghai, People's Republic of China
  SuperKEKB is the upgrade of KEKB, which is the world's largest luminosity accelerator at KEK. One of key items to realize 40 times larger luminosity than that of KEKB is damping ring (DR) for positron injection. The injector linac (LINAC) once stores the produced positrons into DR and suppress their emittance. Then low emittance positrons are extracted from DR and injected into the main ring. For this complicated injection process, the Event Timing System* for LINAC** was upgraded and its soundness is demonstrated by injecting electrons into two light source rings***. New Event modules were also installed under the Event network for LINAC as the sub timing system for DR. New Event modules were developed which can be operated with the different Event clock from that of upstream modules. It solves the difference in RF frequency between LINAC (2856MHz) and DR (509MHz). This sub timing system can manage the triggers towards totally 84 BPMs at DR although it consists of only 5 Event modules. The timing of those triggers can be independently set in more precise than 100ps. The requirements to DR timing system and the newly developed modules with its configuration at DR are explained.
*H. Kaji et al., THCOCA04, Proc. of ICALEPCS'13, San Francisco, CA.**H. Kaji et al., TUPRI109, Proc. of IPAC'14, Dresden, Germany.***Abstract submitted to IPAC'15.
slides icon Slides WEC3O04 [1.496 MB]  
WEC3O05 Timing System for the HAPLS/L3 ELI Project laser, controls, interface, Ethernet 1
  • P. Camino, D. Monnier-Bourdin
    Greenfield Technology, Massy, France
  • M.A. Drouin, J. Naylon
    ELI-BEAMS, Prague, Czech Republic
  • C. Haefner, G.W. Johnson, S.J. Telford
    LLNL, Livermore, California, USA
  • B. Rus
    Czech Republic Academy of Sciences, Institute of Physics, Prague, Czech Republic
  The High Repetition-Rate Advanced Petawatt Laser System (HAPLS) forms part of the European Union's Extreme Light Infrastructure Beamlines project (ELI-Beamlines) which will be the first international laser research infrastructure of its kind. HAPLS will generate peak powers greater than one petawatt at a repetition rate of 10 Hz with 30fs wide pulses. ELI will enable unprecedented techniques for many diverse areas of research. HAPLS requires a high-precision timing system that operates either independently or synchronized with ELI's system. Greenfield Technology, a producer of mature picosecond timing systems for several years, has been hired by LLNL* to provide just such a timing system. It consists of a central Master Timing Generator (MTG) that generates and transmits serial data streams over an optical network that synchronizes local multi-channel delay generators which generate trigger pulses to a resolution of 1ps. The MTG is phase-locked to an external 80 MHz reference that ensures a jitter of less than 10ps. The various qualities and functions of this timing system are presented including the LabVIEW interface and precision phase locking to the 80MHz reference.
*LLNL is operated by Lawrence Livermore National Security, LLC, for the U.S. Department of Energy, National Nuclear Security Administration under Contract DE-AC52-07NA27344.
slides icon Slides WEC3O05 [2.252 MB]  
WEC3O06 ERL Time Management System laser, interface, controls, operation 1
  • P. K. Kankiya, T.A. Miller, B. Sheehy
    BNL, Upton, Long Island, New York, USA
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
The Energy Recovery LINAC (ERL) at BNL is an R&D project. A timing system was developed in conjunction with other available timing systems in order to operate and synchronize instruments at the ERL. This paper describes the time management software which is responsible for automating the delay configuration based on beam power and instrument limitations, for maintaining beam operational parameters, and respond to machine protection system.
slides icon Slides WEC3O06 [4.145 MB]  
WEM301 Timing Systems for ATNF Telescopes controls, software, site, distributed 1
  • S.A. Hoyle
    CASS, Epping, Australia
  • P.L. Mirtschin
    CSIRO ATNF, Epping, Australia
  Radio Telescopes require precise time and timing signals for accurate telescope pointing, synchronisation of signal processing instrumentation and offline manipulation of observation data. We provide an overview of the timing system in use at our observatories; briefly describing the main features of the hardware, firmware and software.  
slides icon Slides WEM301 [0.561 MB]  
poster icon Poster WEM301 [0.390 MB]  
WEPGF106 CCLIBS: The CERN Power Converter Control Libraries controls, software, operation, real-time 1
  • Q. King, K.T. Lebioda, M. Magrans de Abril, M. Martino, R. Murillo-Garcia
    CERN, Geneva, Switzerland
  • A. Nicoletti
    EPFL, Lausanne, Switzerland
  Accurate control of power converters is a vital activity in large physics projects. Several different control scenarios may coexist, including regulation of a circuit's voltage, current, or field strength within a magnet. Depending on the type of facility, a circuit's reference value may be changed asynchronously or synchronously with other circuits. Synchronous changes may be on demand or under the control of a cyclic timing system. In other cases, the reference may be calculated in real-time by an outer regulation loop of some other quantity, such as the tune of the beam in a synchrotron. The power stage may be unipolar or bipolar in voltage and current. If it is unipolar in current, it may be used with a polarity switch. Depending on the design, the power stage may be controlled by a firing angle or PWM duty-cycle reference, or a voltage or current reference. All these different cases are supported by the CERN Converter Control Libraries (CCLIBS), which are open-source C libraries that include advanced reference generation and regulation algorithms. This paper introduces the libraries and reviews their origins, current status and future.  
poster icon Poster WEPGF106 [2.797 MB]  
WEPGF119 Bunch to Bucket Transfer System for FAIR synchrotron, target, kicker, cavity 1
  • J.N. Bai
    IAP, Frankfurt am Main, Germany
  • R. Bär, D. Beck, O.K. Kester, D. Ondreka, C. Prados, W.W. Terpstra
    GSI, Darmstadt, Germany
  • T. Ferrand
    TEMF, TU Darmstadt, Darmstadt, Germany
  For the FAIR accelerator complex, synchronization of the bunch to bucket (B2B) transfer will be realized by the General Machine Timing system and the Low-Level RF system. Based on these two systems, both synchronization methods, the phase shift and the frequency beating method, are available for the B2B transfer system for FAIR. This system is capable to realize the B2B transfer within 10ms and the precision better than 1 degree for ions over the whole range of stable isotopes. At first, this system will be used for the transfer from the SIS18 to the SIS100. It will then be extended to all transfers at the FAIR accelerator facility. This paper introduces the synchronization methods and concentrates on the standard procedures and the functional blocks of the B2B transfer system.  
poster icon Poster WEPGF119 [1.489 MB]  
WEPGF120 Timing System at MAX IV - Status and Development linac, storage-ring, TANGO, controls 1
  • J.J. Jamroz, J. Forsberg, V.H. Hardion, V. Martos, D.P. Spruce
    MAX-lab, Lund, Sweden
  Funding: MAX IV Laboratory
A MAX IV construction of two storage rings (SR1.5GeV and SR3GeV) and a short pulse facility (SPF) has been proceeding over last years and will be finished in the middle of 2016. In 2014, few timing procurements were successfully finalized according to the MAX IV requirements and the installation works are ongoing along with the TANGO control system integration.
poster icon Poster WEPGF120 [0.721 MB]  
WEPGF121 Operation Status of J-PARC Timing System and Future Plan operation, controls, GUI, network 1
  • N. Kamikubota, N. Yamamoto
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  • N. Kikuzawa, F. Tamura
    JAEA/J-PARC, Tokai-mura, Japan
  The beam commissioning of J-PARC started in November, 2006. Since then, the timing system of J-PARC accelerator complex has contributed stable beam operations of three accelerators: a 400-MeV linac (LI), a 3-GeV rapid cycling synchrotron (RCS), and a 50-GeV synchrotron (MR). The timing system handles two different repetition cycles: 25 Hz for LI and RCS, and 2.48-6.00 sec. for MR (MR cycle). In addition, the timing system is capable to provide beams to two different experimental facilities in single MR cycle: Material and Life Science Experimental Facility (MLF) and Neutrino Experimental Facility (NU), or, MLF and Hadron Experimental Facility (HD). Recently, a plan to introduce a new facility, Accelerator-Driven Transmutation Experimental Facility (ADS), around 2018, has been discussed. Studies for the timing system upgrade are started: change of the master repetition rate from 25Hz to 50 Hz, and a scheme to provide beams to three different experimental facilities in single MR cycle (MLF, NU and ADS or MLF, HD and ADS). This paper reviews the 8-year operation experience of the J-PARC timing system, followed by a present perspective of upgrade studies.  
poster icon Poster WEPGF121 [1.042 MB]  
WEPGF122 Real-Time Performance Improvements and Consideration of Parallel Processing for Beam Synchronous Acquisition (BSA) EPICS, real-time, linac, operation 1
  • K.H. Kim, S. Allison, T. Straumann, E. Williams
    SLAC, Menlo Park, California, USA
  Funding: Work supported by the the U.S. Department of Energy, Office of Science under Contract DE-AC02-76SF00515 for LCLS I and LCLS II.
Beam Synchronous Acquisition (BSA) provides a common infrastructure for aligning data to each individual beam pulse, as required by the Linac Coherent Light Source (LCLS). BSA allows 20 independent acquisitions simultaneously for the entire LCLS facility and is used extensively for beam physics, machine diagnostics and operation. BSA is designed as part of LCLS timing system and is currently an EPICS record based implementation, allowing timing receiver EPICS applications to easily add BSA functionality to their own record processing. However, the non-real-time performance of EPICS record processing and the increasing number of BSA devices has brought real-time performance issues. The major reason for the performance problem is likely due to the lack of separation between time-critical BSA upstream processing and non-critical downstream processing. BSA is being improved with thread level programming, breaking the global lock in each BSA device, adding a queue between upstream and downstream processing, and moving out the non-critical downstream to a lower priority worker thread. The use of multiple worker threads for parallel processing in SMP systems is also being investigated.
poster icon Poster WEPGF122 [1.665 MB]  
WEPGF124 Application Using Timing System of RAON Accelerator controls, EPICS, FPGA, Linux 1
  • S. Lee, H. Jang, C.W. Son
    IBS, Daejeon, Republic of Korea
  Funding: This work is supported by the Rare Isotope Science Project funded by Ministry of Science, ICT and Future Planning(MSIP) and National Research Foundation(NRF) of Korea(Project No. 2011-0032011).
RAON is a particle accelerator to research the interaction between the nucleus forming a rare isotope as Korean heavy-ion accelerator. RAON accelerator consists of a number of facilities and equipments as a large-scaled experimental device operating under the distributed environment. For synchronization control between these experimental devices, timing system of the RAON uses the VME-based EVG/EVR system. In order to test the high-speed performance of the control logic with the minimized event signal delay, it is planned to establish the step motor controller testbed applying the FPGA chip. The testbed controller will be configured with Zynq 7000 series of Xilinx FPGA chip. Zynq as SoC (System on Chip) is divided into PS (Processing System) with PL (Programmable Logic). PS with the dual-core ARM cpu is performing the high-level control logic at run-time on linux operating system. PL with the low-level FPGA I/O signal interfaces with the step motor controller with the event signal received from timing system. This paper describes the content and performance evaluation obtained from the step motor control through the various synchronized event signal received from the timing system.
poster icon Poster WEPGF124 [1.690 MB]  
WEPGF126 Prototype of White Rabbit Network in LHAASO network, detector, controls, experiment 1
  • H. Li, G.H. Gong
    Tsinghua University, Beijing, People's Republic of China
  • Q. Du
    LBNL, Berkeley, California, USA
  Funding: Key Laboratory of Particle & Radiation Imaging, Open Research Foundation of State Key Lab of Digital Manufacturing Equipment & Technology in Huazhong Univ. of Science & Technology
Synchronization is a crucial concern in distributed measurement and control systems. White Rabbit provides sub-nanosecond accuracy and picoseconds precision for large distributed systems. In the Large High Altitude Air Shower Observatory project, to guarantee the angular resolution of reconstructed air shower event, a 500 ps overall synchronization precision must be achieved among thousands of detectors. A small prototype built at Yangbajin, Tibet, China has been working well for a whole year. A portable calibration node directly synced with the grandmaster switch and a simple detectors stack named Telescope are used to verify the overall synchronization precision of the whole prototype. The preliminary experiment results show that the long term synchronization of the White-Rabbit network is promising and 500 ps overall synchronization precision is achievable with node by node calibration and temperature correction.
poster icon Poster WEPGF126 [1.228 MB]  
WEPGF127 A Generic Timing Software for Fast Pulsed Magnet Systems at CERN kicker, hardware, controls, software 1
  • C. Chanavat, M. Arruat, E. Carlier, N. Magnin
    CERN, Geneva, Switzerland
  At CERN, fast pulsed magnet (kicker) systems are used to inject, extract, dump and excite beams. Depending on their operational functionalities and as a result of the evolution of controls solutions over time, the timing controls of these systems were based on hybrid hardware architectures that have resulted in a large disparity of software solutions. In order to cure this situation, a Kicker Timing Software (KiTS), based on a modular hardware and software architecture, has been developed with the objective to increase the homogeneity of fast and slow timings control for all types of fast pulsed magnet systems. The KiTS uses a hardware abstraction layer and a configurable software model implemented within the Front-End Software Architecture (FESA) framework. It has been successfully deployed in the control systems of the different types of kicker systems at CERN like for the PS continuous transfer, the SPS injection and extraction, the SPS tune measurement and the LHC injection.  
poster icon Poster WEPGF127 [38.180 MB]  
WEPGF128 Development Status of the Sirius Timing System injection, storage-ring, linac, electron 1
  • J.L.N. Brito, S.R. Marques, L.A. Martins, D.O. Tavares
    LNLS, Campinas, Brazil
  Sirius is a new low-emittance 3 GeV synchrotron light source under construction in Brazil by LNLS, scheduled for commissioning in 2018. Its timing system will be responsible for providing low jitter synchronized signals for the beam injection process as well as reference clocks and triggers for diverse subsystems such as electron BPMs, fast orbit feedback and beamlines distributed around the 518 meters circumference of the storage ring, Booster and Linac. It will be composed of Ethernet-configured standalone event generators and event receivers modules developed by SINAP through a collaboration with LNLS. The modules will be controlled by remote EPICS soft IOCs. This paper presents the system structure and the status of the development, some options for integrating it to the Sirius BPM MicroTCA platform are also discussed.  
poster icon Poster WEPGF128 [13.921 MB]  
WEPGF129 CERN timing on PXI and cRIO platforms hardware, Linux, software, controls 1
  • A. Rijllart, O.O. Andreassen, J. Blanco Alonso
    CERN, Geneva, Switzerland
  Given the time critical applications, the use of PXI and cRIO platforms in the accelerator complex at CERN, require the integration into the CERN timing system. In this paper the present state of integration of both PXI and cRIO platforms in the present General Machine Timing system and the White Rabbit Timing system, which is its successor, is described. PXI is used for LHC collimator control and for the new generation of control systems for the kicker magnets on all CERN accelerators. The cRIO platform is being introduced for transient recording on the CERN electricity distribution system and has potential for applications in other domains, because of its real-time OS, FPGA backbone and hot swap modules. The further development intended and what type of applications are most suitable for each platform, will be discussed.  
poster icon Poster WEPGF129 [1.548 MB]  
THHB2O02 A Modular Approach to Acquisition Systems for Future CERN Beam Instrumentation Developments radiation, FPGA, instrumentation, interface 1
  • A. Boccardi, M. Barros Marin, T.E. Levens, W. Viganò, C. Zamantzas
    CERN, Geneva, Switzerland
  This paper will present the new modular architecture adopted as a baseline by the CERN Beam Instrumentation Group for its future acquisition system developments. The main blocks of this architecture are: radiation tolerant digital front-ends; a latency deterministic multi gigabit optical link; a high pin count FMC carrier used as a VME-based back-end for data concentration and processing. Details will be given on the design criteria for each of these modules as well as examples of their use in systems currently being developed at CERN.  
slides icon Slides THHB2O02 [2.051 MB]  
THHC2O03 Replacing the Engine in Your Car While You Are Still Driving It operation, interface, controls, network 1
  • E. Björklund
    LANL, Los Alamos, New Mexico, USA
  Funding: US Department of Energy under contract DC-AC52-06NA25396.
Replacing your accelerator's timing system with a completely different architecture is not something that happens very often. Perhaps even rarer is the requirement that the replacement not interfere with the accelerator's normal operational cycle. In 2014, The Los Alamos Neutron Science Center (LANSCE) began the first phase of a multi-year rolling upgrade project which will eventually result in the complete replacement of the low-level RF system, the timing system, the industrial I/O system, the beam-synchronized data acquisition system, the fast-protect reporting system, and much of the diagnostic equipment. These projects are mostly independent of each other, with their own installation schedules, priorities, and time-lines. All of them, however, must interface with the timing system. This paper will focus on the timing system replacement project, its conversion from a centralized discrete signal distribution system to a more distributed event-driven system, and the challenges faced by having to interface with both the old and new equipment until the upgrade is completed.
slides icon Slides THHC2O03 [2.341 MB]