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  • THE ELECTRONIC ALADDIN NEWSLETTER NO. 25 February/March/April 2000


    1. REDUCED BEAM SIZE OF ALADDIN DEMONSTRATED

    Studies of a lower emittance lattice for Aladdin have produced a beam size that is a factor of 3-4 times smaller than the standard lattice. A picture of the new beam, together with a more detailed explanation of the lattice can be found at the SRC web site under: http://www.src.wisc.edu/news/LE_Lattice/LELattice.html (No longer available)


    Remarkably, the reduction in beam size hardly affects the lifetime, since the new lattice inherently allows for a longer lifetime at a given emittance. Many beamlines at the SRC are able to take advantage of the reduced beam size by transferring the source image without distortions through a monochromator. That has been verified for some of them already, such as the PGM and HERMON. The smaller beam size provides either a smaller spot with greater flux density on the sample or a greater resolution at the same flux.


    2. NEW GRATING EXTENDS RANGE OF HERMON FROM 62-1200 eV

    A new grating was added to the high energy resolution monochromator HERMON that extends its range down from previously 250 to now 62 eV. This monochromator has become particlularly popular for photoelectron microscopy studies (all the way up to the Gd edge at 1200 eV) and for magnetic circular dichroism (MCD) of magnetic multilayer structures that are used in magneto- electronics. The specifications of the monochromator are posted at: http://www.src.wisc.edu/currentusers/beamlineinformation/beamline_list/033.HTML


    3. SRC USERS MEETING AND WORKSHOP OCT. 27/28

    The annual SRC Users Meeting will take place Friday Oct. 27.  In connection with the Users Group Meeting, there will be a workshop on Atomic and Molecular Physics on Saturday, Oct. 28.  Speakers have been invited to give presentations in the fields of absolute oscillator-strength measurements, limitations in the applicability of the dipole approximation, SR experiments combined with laser radiation, spin-orbit interactions, and fragmentation dynamics of molecules. Workshop participants
    are encouraged to present a poster and to submit a one- to two-page summary of their presentation. This workshop is also a great opportunity to learn more about the research possibilities at the SRC. For details, see:   http://www.src.wisc.edu/news/usermeeting/Workshop.htm


    4. SRI 2001 WILL BE HOSTED BY THE SRC


    The Synchrotron Radiation Instrumentation Conference 2001 will be hosted by the SRC. It will be held at the Pyle Center, on the campus of the University of Wisconsin - Madison, adjacent Lake Mendota, from August 22 - 24, 2001. Information about the conference is posted on the web at:  http://www.src.wisc.edu/SRI2001/default.html


    5. CONGRATULATIONS TO SRC RESEARCHERS

    Ralf Wehlitz, staff member of the SRC, obtained a grant from the
    NSF for research on "Double and Triple Photoionization Studies of
    Few-Electron Systems". Part of this work will be in collaboration
    with Prof. Ivan A. Sellin from the Univ. of Tennessee, Knoxville.

    Franz Himpsel, scientific director of the SRC, became the Ednor
    M. Rowe Professor at the UW-Madison.
    Congratulations!