arXiv subjects

Matthias Clausen

Publications and source records attributed to Matthias Clausen.

3 recordsLinked to original sources

arXiv2002

AIDA: Accelerator Integrated Data Access

All Control Systems that grow to any size have a variety of data that are stored in different formats on different nodes in the network. Examples include sensor value and status, archived sensor data, device oriented support data and relationships, message logs, application and machine configurations etc. Each type of data typically has a different programming interface. Higher-level applications need to access a logically related set of data that is in different data stores and may require different processing. AIDA is envisioned to be a distributed service that allows applications access to this wide variety of Control System data in a consistent way that is language and machine independent. It has the additional goal of providing an object-oriented layer for constructing applications on top of multiple existing conventional systems like EPICS or the SLC Control System. Motivation, design overview and current status will be presented.

physics.acc-ph↗

arXiv2001

An XML Driven Graphical User Interface and Application Management Toolkit

In the past, the features of a user interface were limited by those available in the existing graphical widgets it used. Now, improvements in processor speed have fostered the emergence of interpreted languages, in which the appropriate method to render a given data object can be loaded at runtime. XML can be used to precisely describe the association of data types with their graphical handling (beans), and Java provides an especially rich environment for programming the graphics. We present a graphical user interface builder based on Java Beans and XML, in which the graphical screens are described textually (in files or a database) in terms of their screen components. Each component may be a simple text read back, or a complex plot. The programming model provides for dynamic data pertaining to a component to be forwarded synchronously or asynchronously, to the appropriate handler, which may be a built-in method, or a complex applet. This work was initially motivated by the need to move the legacy VMS display interface of the SLAC Control Program to another platform while preserving all of its existing functionality. However the model allows us a powerful and generic system for adding new kinds of graphics, such as Matlab, data sources, such as EPICS, middleware, such as AIDA[1], and transport, such as XML and SOAP. The system will also include a management console, which will be able to report on the present usage of the system, for instance who is running it where and connected to which channels.

physics.ins-det↗

arXiv2001

An EPICS to TINE Translator

Accelerator control at DESY has in the past been hampered by the 'many-control-systems' syndrome, where different subsystems were controlled by completely different means offering no possibility of intercommunication. Today, practically all subsystems of HERA are controlled by TINE. Important exceptions include the Proton Vacuum(DOOCS), cryogenics control(D3), and the super-conducting electron RF cavities and the power and cooling subsystems, the latter two of which are controlled by EPICS IOCs. A step toward integrating the EPICS IOCs into the HERA mainstream has been taken in that an EPICS to TINE translator process has been written, which runs directly on the EPICS IOC and offers a TINE view of the hardware control to the rest of the control system. This in effect renders the EPICS IOC into a bi-lingual server, and highlights the principal difference between a 'translator' and a 'gateway'. Details of this translator are presented in this paper.

physics.acc-ph↗