Status and commissioning-results of BESSY II
The new Storage Ring BESSY II in Berlin Germany is a dedicated third generation synchrotron radiation source for the VUV and soft X-ray spectral range. On April 22/sup nd/, 1998 a 1.7 GeV electron beam was stored for the first time. Despite a relatively short time for commissioning of the synchrotron radiation source, the milestones were met as scheduled. Accelerator parameters that determine the quality of the synchrotron radiation are as designed or the design goals were even exceeded. The only parameter that is still not according to design is the beam lifetime, as the baking of the vacuum system is not completed yet. The regular scientific program started according to plan in January 1999 with experiments. The front-end for 22 additional beamlines are installed and scheduled for use before the end of next year. Thus required shutdown periods will also be used to install additional hardware to improve the performance of the ring.
Experiences with commissioning software tools at BESSY II
Software requirements evolve rapidly during the short commissioning period of a third generation light source. Main focus moves from atomic device control to complex conditioning, experiment performance, measurement data taking, beam quality maintenance and performance monitoring tasks. From the very beginning the essential tools have to be set up properly and need to be sufficiently adaptive to easily absorb the actual findings of the running in procedures. In this paper the major software modules at BESSY II are depicted and their relevance for the progress of the commissioning is rated. Implemented functionalities and used methods are described in more detail for the basic workhorses (like compound devices, handling of snapshot files, orbit control). Explanations are given why certain tools turned out to be less accepted or useful (yet).
A Phenomenological Study of the Wind Band Experience: Stories of Band
A PHENOMENOLOGICAL STUDY OF THE WIND BAND EXPERIENCE: