linac

Paper	Title	Other Keywords	Page
WECOMA04	What's behind an Accelerator-Control-System?	controls, monitoring, vacuum, synchrotron	13
	R. Schmitz DESY, Hamburg
	There are a lot of features a control-system should have. Some of which are essential, e.g. that minimum set of application-programs and the infrastructure they need to run which at least allow operators to switch on and off the accelerator. Other features are not as obvious as GUIs, intelligent control algorithms or data-acquisition methods, but they require considerable manpower and should not be underestimated, for they have a major impact on the availability of the control system. This paper will describe the efforts made and being made by the control-systems group at DESY to provide a reliable tool for the operators, minimizing the downtime caused by control-system failures. This paper is a partial review of this aspect of computer based accelerator-control dating back to the late 1970s when the accelerator PETRA went into operation, controlled entirely by computers, i.e. mini-computers from NORSK DATA. Notwithstanding the respect we owe to the computer and to the technology which supports it, a good Control-System group behind an Accelerator-Control-System is essential to its success.
	Slides
WEPL015	An orbit feedback for the Free Electron Laser in Hamburg (FLASH)	feedback, controls, optics, synchrotron	58
	R. Kammering DESY, Hamburg J. Carwardine ANL, Argonne
	The lack of knowledge of the exact energy profile of the Free Electron Laser in Hamburg (FLASH) and thereby of the orbit response matrix, made the implementation of a conventional orbit feedback in the past very difficult. The new run period started this spring after extensive modifications of the facility, showed that the responses matrixes seam now to be in good agreement with the theory, thereby allowing the application of standard orbit feedback techniques. The physics concepts and the chosen architecture to implement such software on the middle layer and interplay with other high-level software components will be discussed. The development and implementation of this software using the DOOCS servers in combination with the dynamic components of the Java DOOCS data display (jddd) allowed a flexible and scalable implementation, which could also serve as a prototype for future implementations at e.g. the European XFEL.
	Poster
WEPL023	Improvements for Simple Operation at SAGA-LS Accelerator	controls, radiation, injection, acceleration	76
	Y. Iwasaki, T. Kaneyasu, S. Koda, Y. Takabayashi SAGA, Tosu
	The SAGA Light Source (SAGA-LS) is a medium size synchrotron light facility, which consists of a 255 MeV injector linac and a 1.4 GeV storage ring. The control system of the accelerator has been constructed and developed from the beginning of the machine commissioning. We have employed PC-based control system because of a high cost performance of PC. The Channel Access protocol is emulated using ActiveX CA to communicate with server PCs and client PCs. Off-the-shelf industrial IO devices such as FieldPoint, and PLC are directly connected to the local server PC (PC-IOC) via Ethernet. The applications for the system are developed in-house using LabView. Recently, for plain and easy operation of accelerator we have made several upgrading of the control system. First, we made communication interfaces between accelerator system and radiation interlock system. Second, we attempt to reduce the number of server machines as possible as possible. Third, we develop a PC client program, which communicates with server PCs by a sequential procedure and sets the radiation interlock mode using touch panel PC display. By these improvements the daily operation of accelerator has become simplified.
	Poster
WEPL025	Control and Timing System Design of CPHS Project	controls, hadron, target, monitoring	79
	Q. Du, H. Gong, X. Guan, J. M. Li, J. Wei TUB, Beijing B. B. Shao Tsinghua University, Beijing
	The control system consists of a timing and event distribution system, an EPICS based distributed run-time database and control system, and a comprehensive personnel and machine protection system. The timing and event distribution system defines the global system time frame as well as specific events that trigger local devices by an event generator and receiver framework, so that the time delay of each event could be controlled in 10ns resolution, and the timing jitter of trigger signal is below 0.1ns. The hard-real-time machine protection system is also integrated in the event system so that a fault event could be responded within 50 micro-seconds. Field control signals such as water temperature, vacuum, low level RF phase and amplitude and radiation dose are monitored and controlled via the EPICS database through Ethernet.
	Poster
WEPL029	Applicability of XAL for ESS	controls, lattice, site, simulation	85
	J. Bobnar Cosylab, Ljubljana C. K. Allen, T. A. Pelaia ORNL, Oak Ridge, Tennessee S. Peggs, C. G. Trahern ESS-S, Lund T. Satogata BNL, Upton, Long Island, New York
	XAL is a Java based application framework, developed at the Spallation Neutron Source (SNS). The framework is designed to provide an accelerator physics programming interface to the accelerator and it allows writing general purpose applications dedicated to various parts of the accelerator. The backbone of XAL framework is an XML based description of the accelerator. The XML file provides the list of all devices, their properties, and in-between devices relations within the system. Since the accelerator structure is defined in the relational database, the XML can be generated directly out from the database using appropriate adapters. This allows the framework to be more generic and enables it to run on different sites using various configurations. The generality of the XAL and the rich set of applications and tools provided by SNS make the framework very appealing for usage at other accelerator sites. European Spallation Source (ESS) is being built in Sweden, which will be in overall an accelerator similar to SNS. Therefore, XAL has been considered to be used at ESS for high-level applications. The applicability of XAL and prototyping for ESS will be discussed in this article.
	Poster
WEPL037	A Novel Approach for Beam Commissioning Software using Service Oriented Architecture	simulation, controls, pick-up, monitoring	100
	G. B. Shen BNL, Upton, Long Island, New York P. Chu, J. Wu SLAC, Menlo Park, California
	A novel software framework is under development, which is for an accelerator beam commissioning and operation. It adopts a client/server based architecture to replace the more traditional monolithic high level application approach. A minimum set of commissioning and operational services has been defined such as simulation server service, directory service, magnet service, and bpm service, etc.. Most of them have been prototyped. Services can use EPICS pvData as its data container and pvAccess as communication protocol. This paper describes conceptual design and latest progress for some services
	Poster
THCOMA04	A simple DAQ system based on LabVIEW, php and MySQL	controls, radiation, proton, monitoring	112
	M. Tanigaki, K. Takamiya KURRI, Osaka
	A tiny and simple DAQ system has been designed and developed for the application to the control system in our institute. This DAQ system is based on on LabView, MySQL and apache, and shows good compatibility with LabVIEW-based system like the control system for the FFAG complex in our institute. The current status for the development, as well as the recent accelerator-related status in our institute, will be introduced.
	Slides
THPL010	CLS LINAC Safety System Upgrade	controls, instrumentation, simulation, fibre-optics	144
	H. Zhang, C. Britton, G. Cubbon, C. Finlay, E. Matias, R. Tanner CLS, Saskatoon, Saskatchewan
	The Canadian Light Source (CLS) has upgraded the safety system for its Linear Accelerator (Linac) in October 2009. IEC 61508 SIL 3 certified components and methods were adopted in the development of the new safety system. This paper describes the new safety system and outlines the lessons learned from the project in applying industrial safety rated PLC equipment in the development of safety system for CLS accelerator.
	Poster
THPL026	ESS Controls Strategy and Control Box Concept	controls, target, instrumentation, proton	183
	I. Verstovsek, K. Zagar Cosylab, Ljubljana S. Peggs, C. G. Trahern ESS-S, Lund T. Satogata BNL, Upton, Long Island, New York
	European Spallation Source (ESS) will be constructed by a number of partner institutions in an international collaboration, thus increasing organizational risk as control system integration will be performed by a large number of independent teams. From the earliest stages in the project a lot of effort will be put into standardization of hardware, software and development procedures. ESS will use EPICS control system and will build on the positive experience of SNS and ITER. The basic unit of standardization is called the Control Box, and consists of one or more input/output controller (IOC) computers, zero or more I/O modules, PLC subsystems and intelligent special-purpose controllers, with all the software and a fully integrated development environment support. In this article we present the challenges faced by the Control Box concept and the benefits it brings.
FRCOMA02	FLASH DAQ Data Management and Access Tools	controls, extraction, laser, free-electron-laser	195
	V. Rybnikov, V. Kocharyan, K. Rehlich, E. Sombrowski, T. Wilksen DESY, Hamburg
	The Free Electron Laser in Hamburg (FLASH) at DESY is a user facility for the photon science community. It produces laser light of short wavelengths from the extreme ultraviolet down to soft X-rays. To study, monitor and document the machine performance and parameters and also to collect the results of the experiment measurements, a fast data acquisition (DAQ) system has been developed. Having above 1000 linear accelerator diagnostics channels collected by the DAQ currently results in a data rate of ~100MB/s. The large amount of data requires corresponding data storage and management to enable an efficient data retrieval. This paper will focus on the data paths, storage and bookkeeping. A number of tools provided for the users to work with DAQ data will be described. The current status of the achieved performance in the data storage and retrieval will be covered as well.
	Slides