New multilayers @ D1

For radiography the vertical beamsize should be as large as possible. A set of 4" x 1" multilayers with a d-spacing of 29.8A was installed in the D-line mono in August 2004. Material is Mo:B4C which has a better reflectivity in the 10-15 keV range than W-based multilayers. A new set of holders was designed and sent for manufacture by Alan Pauling which became available in week 3 of the July 2004 run, just in time for experiments.

ML1 mount

The first multilayer is attached to a water-cooled nickel-plated copper block with InGa alloy.


ML2 mount

The mount of the second multilayer.

both ML aligned

Both multilayers were prealigned with a water level, and the Bragg reflection was found quickly.
The first multilayer already shows some discoloration, trademark of the He environment in the mono box.


white beam slits

For completeness a picture of the white beam slits, which were rebrazed and cleaned by Jim Savino
just before the run, in order to fix a water leak.