Specialized editor for processing objects in a database to prepare discharges for WENDELSTEIN 7-X

WENDELSTEIN 7-X is a long pulse experiment. One discharge may last up to 30 minutes and will be divided into many small physical program points (segments). A set of chained segments is called a scenario, and a few scenarios will make up the experiment program. In order to make optimal use of the discharge duration, the experiment program must be available in a physically reasonable order. This means that physical programs need to be preplanned and technical parameters need to be adjusted in the long run. All information necessary for this purpose is stored in the W7-X configuration database. To access this information an effective and user friendly tool is needed. The ConfiX editor is a specialized editor for processing objects in the W7-X configuration database. It is used to prepare and describe the process of discharges. ConfiX is mainly used for three cases of application, namely to (1) define configurations, (2) prepare segments and (3) specify scenarios. This contribution will give an overview of the purpose, functions and features of the ConfiX editor

Using the Network as Bus System for Long Discharge Data Acquisition and Processing

Data acquisition in shot-based fusion experiments is characterized by a huge amount of data collected within a short time. The Stellarator experiment Wendelstein 7-X will produce a considerable higher amount of data in a continuous and steady-state operation within half an hour. For Wendelstein 7-X it is not sufficient to wait until all data has been acquired and stored in the database before being able to view and analyze data. A distributed data monitoring system has been developed for visualization of trends. This implies a completely new demand on continuous robust data transport via the network. It is planned to use the LAN with commercial available standard hardware components for periodic as well as asynchronous communication between software modules. Fields of application include the data monitoring system, acquisition of PLC data, signaling between modules and continuous data traffic for distributed online analysis. Therefore a general and easy-to-use network channel concept has been introduced. In contrast to existing TCP/IP based data pull techniques the network is treated as universal bus system like PCI or field bus systems. For data monitoring the underlying protocol is OSI layer 3 IP Multicast/UDP in a data push model with modules sending periodically and modules listening. No additional protocol overhead is added because the data structure is well-known to all modules. Plug in of other bus-like architectures is provided and has been proven for the shared memory hardware in use at the Asdex Upgrade Experiment. The paper gives an insight into the network channel concept and the implementation covering the system-wide available data description, half sync/half async communication pattern, data serialization, identification and matching of data as well as possible security aspects. In a special Multicast section the results of performance measurements are presented. Suitability and limitations are discussed and an appropriate answer to the question “When is IP Multicast/UDP reliable?” is given

Specialized editor for processing objects in a database to prepare discharges for WENDELSTEIN 7-X

WENDELSTEIN 7-X is a long pulse experiment. One discharge may last up to 30 minutes and will be divided into many small physical program points (segments). A set of chained segments is called a scenario, and a few scenarios will make up the experiment program. In order to make optimal use of the discharge duration, the experiment program must be available in a physically reasonable order. This means that physical programs need to be preplanned and technical parameters need to be adjusted in the long run. All information necessary for this purpose is stored in the W7-X configuration database. To access this information an effective and user friendly tool is needed. The ConfiX editor is a specialized editor for processing objects in the W7-X configuration database. It is used to prepare and describe the process of discharges. ConfiX is mainly used for three cases of application, namely to (1) define configurations, (2) prepare segments and (3) specify scenarios. This contribution will give an overview of the purpose, functions and features of the ConfiX editor

Specialized editor for processing objects in a database to prepare discharges for WENDELSTEIN 7-X

WENDELSTEIN 7-X is a long pulse experiment. One discharge may last up to 30 minutes and will be divided into many small physical program points (segments). A set of chained segments is called a scenario, and a few scenarios will make up the experiment program. In order to make optimal use of the discharge duration, the experiment program must be available in a physically reasonable order. This means that physical programs need to be preplanned and technical parameters need to be adjusted in the long run. All information necessary for this purpose is stored in the W7-X configuration database. To access this information an effective and user friendly tool is needed. The ConfiX editor is a specialized editor for processing objects in the W7-X configuration database. It is used to prepare and describe the process of discharges. ConfiX is mainly used for three cases of application, namely to (1) define configurations, (2) prepare segments and (3) specify scenarios. This contribution will give an overview of the purpose, functions and features of the ConfiX editor