All three gratings for SGM-3 have now been put into operation, and the resolution for both the medium- and high-energy grating is better than specified. The resolution with the low-energy grating is slightly worse, and the cause is suspected to be vibrations. The resolution is, however, better than that of the electron spectrometer. Finally, the first photo-electron spectra have also been acquired. So CONGRATULATIONS to the people involved in bringing this new world-class facility at ISA into operation.
The EBIS was thoroughly investigated last week during the visit by Leif Liljeby from Stockholm, and the source seems to be working properly. It was, however, realized that the emittance of the beam from the EBIS is much larger that from our standard sources amounting to around 100 mm mrad. This will have some consequences on the current that can be used by ASTRID, in particular for charge-exchanged beams. A very positive observation made was that the peak current from the EBIS is large (> 10 mA). The pressure in the EBIS source might, however, be somewhat high in order to get large currents of the injected species. The need for further pumping, and diagnostics and focusing, will be investigated in the near future.
The x-ray microscope is back in operation with the new zone-plates from Göttingen. The resolution and exposure times obtained are superior to that of the last run.
ELISA is being diagnosed using laser-flourescence from a stored Mg+ beam. The observed transverse beam sizes are small; around 3 mm FWHM. Before changing the deflection plates to the new cylindrical plates, the velocity distributions will be measured.
A nordic summer school on Synchrotron Radiation for research students has been announced; see http://www.maxlab.lu.se. All costs will be paid by the school!
23/2 2000 / +