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.
START OF COMMISSIONING OF THE HIGH BRILLIANCE SYNCHROTRON RADIATION SOURCE BESSYII
BESSY II, the new low emittance high brilliance 3 rd generation synchrotron radiation light source at BerlinAdlershof [1] started commissioning. Three months ahead of schedule an electron beam was successfully stored and accumulated on April 22 . During these first tests the storage ring was operated at its design energy of 1.7 GeV. The Synchrotron Radiation source is optimised for the generation of synchrotron light in the VUV to soft X-ray range operating at beam energies of 0.9 – 1.9 GeV. In the present stage 5 beam lines are being set up. Preparation for operating the first undulator already on place as well as installation of a first superconducting wiggler are well advanced allowing start of the regular scientific program in January 1999 according to schedule. This paper reviews the status of the facility and presents results of the first commissioning runs.
What is Enlightenment
Enlightenment is man's emergence from his self-imposed nonage. Nonage is the inability to use one's own understanding without another's guidance. This nonage is self-imposed if its cause lies not in lack of understanding but in indecision and lack of courage to use one's own mind without another's guidance. Dare to know! (Sapere aude.) "Have the courage to use your own understanding," is therefore the motto of the enlightenment.