arXiv subjects

B. Franksen

Publications and source records attributed to B. Franksen.

3 recordsLinked to original sources

arXiv2002

A Cost-Efficient PC Based Frame Grabber as Beam Diagnostic Tool in an EPICS Environment

Analysis of video images is a common way to determine the properties of an electron or synchrotron radiation beam. At BESSY a cost-efficient frame grabber hardware controlled by a Windows PC allows one to perform such an analysis in real-time. Live video images on the PC monitor give operators a direct view of the beam, optionally enhanced by artificial coloring and graphical overlays. The application software has been integrated into the EPICS environment by including a Channel Access (CA) server. Thus the numerical results and the application's control commands are accessible over a network through CA Process Variables. A newly developed C++ class library is used to provide the variables with the usual attributes required by advanced CA clients such as graphical display managers.

physics.ins-det↗

arXiv2001

Introducing I/O Channels into the Device Database Opens New Potentialities for Configuration Management

The reference RDBMS for BESSY II has been set up with a device oriented data model. This has proven adequate for e.g. template based RTDB generation, modelling etc. But since assigned I/O channels have been stored outside the database (a) numerous specific conditions had to be maintained within the scripts generating configuration files and (b) several generic applications could not be set up automatically by scripts. In a larger re-design effort the I/O channels are introduced into the RDBMS. That modification allows to generate a larger set of RTDBs, map specific conditions into database relations and maintain application configurations by relatively simple extraction scripts.

physics.acc-ph↗

arXiv2001

Corrector Power Supplies with a DAC Resolution up to 24 Bits based on 16 Bit DAC Devices

At BESSY the standard 16 bit resolution of the corrector power supplies was insufficient for the continous orbit drift correction. A new sophisticated design of the analog/digital I/O board increases the resolution of the analog output up to 24 bits without suffering on losses in the long term stability or the dynamic range of the correctors. This is achieved by a cost-efficient boarddesign using standard 16 bit DAC devices in an range-overlapping fine/coarse architecture.

physics.acc-ph↗