Column
Cross beam optics(CBO)
CBO
is
an optical system which easily switches between the divergent beam used in measurements in para-focusing
optics and the parallel beam conditioned by multilayer mirror, by replacing the selection slits. As shown in the
diagram, selection slit (BB) uses X-rays passing through optical path A, while selection slit (PB) uses X-rays
passing through optical path
B. In SmartLab SE, the multilayer mirror is designed so that optical path A and optical
path B intersect at the center (goniometer center)
of
the sample at a distance
of300
mm from the X-ray focal point.
There is no need to remove the multilayer mirror when switching from parallel beam optics to para-focusing optics.
Simply change the selection slits and perform 2-theta axis adjustment one time.
Selection slit (BB)
Sample
X-ray source
Optical path
A (divergent beam)
Selection slit
(PB) Sample
X-~ ~ ~ +
=:::==::=:=~
'
~;
~="'.
~
~
Optical path B (parallel beam)
Switching between para-focusing optics and parallel beam optics by changing selection slits
CBO-E keeps the CBO feature which makes the optical paths A and B intersect on the sample. The only difference
is that the shape
of
the multilayer mirror used in the CBO-E unit is ellipsoidal while the mirror shape used for CBO
is parabolic.
The
ellipsoidal multilayer mirror used in CBO-E has been designed so that one focus
of
the ellipsoid is placed at the
focus
of
the X-ray source and the other focus
of
the ellipsoid falls on the detector plane. When measuring capillary
samples or samples on the transmission SAXS sample plate in the transmission geometry, the measurement can be
performed very efficiently
ifa
10
detector like D/teX Ultra is used in combination.
The
CBO-E unit also switches
between measurements
in
the reflection geometry in para-focusing optics and those in the transmission geometry in
convergent optics. In both cases, D/teX Ultra enables very efficient measurements.
X-ray source
,'
Sample
Detector position
\
\
\
\
I
I
··-.
I
... ··-. \
,
···--
...
_
"l:::::::
:S=:.:;:::=
=======
===
==tz
~
===:==
==
~
~~
~
Optical path B ( converg~nt.beam(
----
-
--
--
---------
--
--
---
------
--
--
..
-
--
--.
Selection slit (CB)
Diagram
of
the optics using CBO-E
To Next Page
Loading...
