MovIng your saMple CRYOSTATION

Moving your sample
CRYOSTATION
Many applications require that the sample is moved,
for example:
• Precise alignment of the sample to the optical path.
• Scanning of the surface
• Large range of motion, for example moving between a reference spot and a measurement area
to remove the effects of the optical path.
While several approaches are possible to achieve
motion, the most flexible approach is to use the
Attocube cryogenic tested precision motion stages.
To select the proper stages:
Application
Notes
APP -205
1. Decide on the motion direction,
magnitude and precision required
Attocube piezo stages are available in
linear (x/y), vertical (z), rotation, or tilt.
2. Determine the number of stages
required
3. Contact attocube and discuss the stage size, stage
stack height, and the position control required.
4. Decide if you need feedback (RES option)
5. Select the proper stages, controller, and interface
features
Work with Montana Instruments to determine the
cold link design between the cold stage and
the sample on the stack.
1
Example XYZ stack.
Figure
The next page shows a summary list
of common Attocube stages and their
capabilities. This table is a guide for rough
capabilities; see the Attocube catalog for
the latest options and compatibility. All
stages indicated by /LT can be used for
Low Temperature and are compatible with
magnetic fields. The stages may be stacked
– a typical combination is X,Y,Z with Z on
the bottom. See the Attocube catalog for
restrictions on stacking. The stages can be
driven with coarse stepping via the slip-stick
principle, or by fine positioning/scanning via
DC offset voltage.
Montana Instruments
will work with
attocube to help you
find the right stages
for your application.
We can integrate those
stages so your system
will arrive tested
and working.
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1
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Typical options for the Attocube stages:
Attocube
Model
ANPz30 ANPx51 ANPz51 ANPx51/RES
ANPz51/RES ANPx101 ANPz101 ANPx101/RES ANPz101/RES ANPx101eXT12 ANPx101eXT12/RES ANPx101eXT20 ANPx101eXT20/RES ANPz101eXT12 ANPz101eXT12/RES Application
Notes
APP -205
ANSxy50
ANSz50 ANSxy100 ANSz100 ANSxyz100 ANSxyz110 ANR51
ANR51/RES
ANRv51
ANRv51/RES
ANR101 ANR101/RES
ANRv101 ANRv101RES ANGt50 ANGp50
ANGt101 ANGp101 ANGt101/RES ANGp101/RES Max
Load
Travel Coarse
step
grams microns nm
nm
2.5
3
3
3
3
5
5
5
5
12 12 20 20 12 12 10 10 10 10 10 10 10 10 10 10 10 10 10 10 <1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
10 50 50 50 50 200 200 200 200 200 200 200 200 200 200
grams microns 50 50 100 100 100 100 grams
30 30 20 20 100 100 50 50 grams
25 25 100 100 100 100 12 2 9/30 2/15/30 combined 2 deg
360 360 360 360 360 360 360 360 deg
7.2 5.8 6.6 5.4 6.6 5.4 Fine
pos
nm
<1
<1
<1
<1
<1
<1
microdeg
500
500
500
500
500
500
500
500
microdeg
20
20
20
20
20
20
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The translation stages may be mounted on the cold
platform, or in recessed pocket, a special feature of
the Piezo-recessed version of the Cyrostation.
Figure 2 shows the cross section of the sample
chamber with the recessed nano-positioning insert
pocket in place. The pocket may be removed, and
the stages pre-assembled into it for installation into
the sample space.
Figure 2 Sample Chamber with
Nano-positioning Insert
Figure 3. shows the nano-positioning insert
separately. You can see the stages and the flexible
links to the sample mount at the top of the assembly.
When the stages are mounted into a
system without the recessed pocket,
Application
they mount above the platform. There
Notes
needs to be a flexible link to connect
the sample mount on top of the stages
APP -205
to the cold platform. These are custom
made depending on the stage height
and motion directions. The user may
select a taller window assembly if they wish to get
the proper optical access geometry.
3 Nano-positioning Insert with
Stages inserted and Flex Link at top
Figure
The user could design other mechanical approaches
to manipulate the sample, including a direct
connection if desired. These approaches often
depend on the specific application.
4 Flex Link for use above
the cold platform
Figure
If you have specific application questions
or would like to discuss anything else,
please call the cryogenic engineers at
Montana Instruments!
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