optics

Paper	Title	Other Keywords	Page
MOAB03	Trends in Software for Large Astronomy Projects	controls, feedback, laser, monitoring	13
	K. K. Gillies Gemini Observatory, Southern Operations Center, Tucson, AZ B. D. Goodrich, S. B. Wampler Advanced Technology Solar Telescope, National Solar Observatory, Tucson J. M. Johnson, K. McCann W. M. Keck Observatory, Kamuela S. Schumacher National Optical Astronomy Observatories, La Serena, Chile D. R. Silva AURA/Thirty Meter Telescope, Pasadena/CA A. Wallander, G. Chiozzi ESO, Garching bei Muenchen
	The current 8-10M ground-based telescopes require complex real-time control systems that are large, distributed, fault-tolerant, integrated, and heterogeneous. New challenges are on the horizon with new instruments, AO, laser guide stars, and the next generation of even larger telescopes. These projects are characterized by increasing complexity, where requirements cannot be met in isolation due to the high coupling between the components in the control and acquisition chain. Additionally, the high cost for the observing time imposes very challenging requirements in terms of system reliability and observing efficiency. The challenges presented by the next generation of telescopes go beyond a matter of scale and may even require a change in paradigm. Although our focus is on control systems, it is essential to keep in mind that this is just one of the several subsystems integrated in the whole observatory end-to-end operation. In this paper we show how the astronomical community is responding to these challenges in the software arena. We analyze the evolution in control system architecture and software infrastructure, looking into the future for these two generations of projects.
	Slides
TPPA13	High-level Application Framework for LCLS	controls, SNS, linac, lattice	114
	S. Chevtsov, D. Fairley, C. Larrieu, J. Rock, D. Rogind, G. R. White, S. Zelazny, P. Chu SLAC, Menlo Park, California
	A framework for high-level accelerator application software has been planned for the Linac Coherent Light Source (LCLS). The framework is based on plug-in technology developed by the Eclipse open-source project. Many existing functionalities provided by Eclipse are available to high-level applications written within this framework. The framework contains static data storage, configuration, and dynamic data connectivity, as well as modeling through XAL and MAD. Additionally, because the framework is Eclipse-based, it is highly compatible with any other Eclipse plug-ins, such as Control System Studio. The entire infrastructure of the software framework will be presented. Applications and plug-ins based on the framework are also presented.
TPPB34	ISAC Control System Update	controls, diagnostics, ion, monitoring	235
	D. Bishop, D. Dale, T. Howland, H. Hui, K. Langton, M. LeRoss, R. B. Nussbaumer, C. G. Payne, K. Pelzer, J. E. Richards, W. Roberts, E. Tikhomolov, G. Waters, R. Keitel TRIUMF, Vancouver
	At the ISAC radioactive beam facility, the superconducting Linac was commissioned, and several experimental beam lines were added. The paper will describe the additions to the EPICS-based control system, issues with integration of third-party systems, as well as integration of accelerator controls with experiment controls.
WOPA03	LHC Software Architecture [LSA] – Evolution Toward LHC Beam Commissioning	controls, injection, collider, beam-losses	307
	S. Deghaye, M. Lamont, L. Mestre, M. Misiowiec, W. Sliwinski, G. Kruk CERN, Geneva
	The LHC Software Architecture (LSA) project will provide homogenous application software to operate the Super Proton Synchrotron accelerator (SPS), its transfer lines, and the LHC (Large Hadron Collider). It has been already successfully used in 2005 and 2006 to operate the Low Energy Ion Ring accelerator (LEIR), SPS and LHC transfer lines, replacing the existing old software. This paper presents an overview of the architecture, the status of current development and future plans. The system is entirely written in Java and it is using the Spring Framework, an open-source lightweight container for Java platform, taking advantage of dependency injection (DI), aspect oriented programming (AOP) and provided services like transactions or remote access. Additionally, all LSA applications can run in 2-tier mode as well as in 3-tier mode; thus the system joins benefits of 3-tier architecture with ease of development and testability of 2-tier applications. Today, the architecture of the system is very stable. Nevertheless, there are still several areas where the current domain model needs to be extended in order to satisfy requirements of LHC operation.
	Slides
ROAA02	Automatic Alignment System for the National Ignition Facility	controls, alignment, laser, target	486
	A. A.S. Awwal, S. W. Ferguson, B. Horowitz, V. J. Miller Kamm, C. A. Reynolds, K. C. Wilhelmsen LLNL, Livermore
	The Automatic Alignment System for the National Ignition Facility (NIF) is a large-scale parallel system that directs all 192 laser beams along the 300-m optical path to a 50-micron focus at target chamber in less than 30 minutes. The system commands 9,000 stepping motors to adjust mirrors and other optics. Twenty-two control loops per beamline request image processing services from a dedicated Linux cluster running Interactive Data Language tools that analyze high-resolution images of the beam and references. Process leveling assures the computational load is evenly spread. Algorithms also estimate measurement accuracy and reject off-normal images. One challenge to rapid alignment of beams in parallel is efficient coordination of shared devices, such as sensors that monitor multiple beams. Contention for shared resources is managed by the Component Mediation System, which precludes deadlocks and optimizes device motions using a hierarchical component structure. A reservation service provided by the software framework prevents interference from competing automated controls or the actions of system operators. The design, architecture and performance of the system will be discussed.
	Slides
RPPA03	The LHC Functional Layout Database as Foundation of the Controls System	controls, instrumentation, cryogenics, vacuum	526
	R. Billen, J. Mariethoz, P. Le Roux CERN, Geneva
	For the design, construction, integration, and installation of the LHC, the LHC Layout database manages the information on the functional positions of the components of the LHC. Since January 2005, the scope of this database has been extended to include all electronics racks in the tunnel, underground areas, and surface buildings. This description of the accelerator and the installed controls topology is now used as the foundation for the online operational databases, namely for controls configuration and operational settings. This paper will sketch the scope of the Layout database and explain the details of data propagation towards the respective controls data consumers. The question whether this approach is applicable to the rest of the accelerator complex at CERN will be addressed as well.
RPPA14	Java Tool Framework for Automation of Hardware Commissioning and Maintenance Procedures	controls, laser, alignment, feedback	547
	J. M. Fisher, J. B. Gordon, L. J. Lagin, S. L. West, J. C. Ho LLNL, Livermore, California
	The National Ignition Facility (NIF) is a 192-beam laser system designed to study high energy density physics. Each beam line contains a variety of line replaceable units (LRUs) that include optics, stepping motors, sensors and other devices to control and diagnose the laser. During commissioning or subsequent maintenance of the laser, LRUs undergo a qualification process using the Integrated Computer Control System (ICCS) to verify and calibrate the equipment. The commissioning processes are both repetitive and tedious using remote manual computer controls, making them ideal candidates for software automation. Maintenance and Commissioning Tool (MCT) software was developed to improve the efficiency of the qualification process. The tools are implemented in Java, leveraging ICCS services and CORBA to communicate with the control devices. The framework provides easy-to-use mechanisms for handling configuration data, task execution, task progress reporting, and generation of commissioning test reports. The tool framework design and application examples will be discussed.