New dual-purpose photon shutter-slit assembly for high-power beamline front ends at HASYLAB

摘要: ABSTRACT High power wiggler or undulator beamlines at synchrotron radiation sources need devices that stop reduce the size of beam. This paper describes a new photon shutter/slit assembly takes advantage high collimation x-raybeam in vertical direction. In center water-cooled copper block, an opening has been configured anaperture 10 x 120 2 with length 100 mm. block is rotated around axis. There are two modes operation for rotation. One mode switches beam on and off. The other controls rotation, whichresults variable slit. angle this rotation reduces density cooled surface slit by afactor larger than ten. comparison to conventional shutter designs discussed. 1. INTRODUCTIONFive x-ray have started Hamburger Synchrotronstrahlungslabor (HASYLAB) 1992.' total these beamlines, installed storage ring DORIS