Sample manipulation

Sample manipulators


manipulator 4-axes, z 300 mm 5-axes, z 500 mm
usually mounted in experimental chamber preparation chamber - top
(reaching also preparation chamber - bottom)
x, y 0-50 mm
manual by micrometers
center = 25 mm
 
0-50 mm
manual by micrometers
center = 25 mm
x = 42 mm in order to pass through the valve!
z (height) 0-300 mm
motorized with end-switches
useful range 100-260 mm
reading on motor controller or vertical ruler
0-500 mm
motorized with end-switches
useful range 100-460 mm
reading on motor controller or vertical ruler
Θ (polar) 0-360°
motorized without end-switches
useful range 30-300°
reading on motor controller or index above the motor
0-360°
manual by handle
useful range 90-300°
reading on rotatable flange scale
Φ (azimuth) fixed ±100°
motorized with end-switches
useful range ±90°
reading on motor controller
annealing up to 1300 K up to 1300 K
cooling 100 K in 20 minutes 150 K in 1 hour
typical Θ 30°
60°
90°
150°
180°
185.3°
190°
210°
220°
230°
268°
275°
Ce evaporator
bottom exchangeable evaporator
Oxford evaporator, LEED
SR normal incidence
SR 30° incidence, 30° emission; top exchangeable evaporator
SR magic angle
XPS (20° emission)
SR normal emission
SR grazing incidence (20° off surface)
SR grazing incidence (10° off surface)
sample transfer
ion sputtering (45° incidence)
270°










 
sample transfer










 


Motor controllers



The controllers are connected using standard UTP cables serving for both power and data transfer between them and the computer. Each controller has 3 equal sockets. The most distant socket from the computer should be fitted by a terminator but usually it works also without it.

The display shows actual value of its own axis or rC.00_ for remote controlled axis which can be:
  • 002 for Φ (azimuth angle) in the experimental chamber (not connected if the manipulators are not swapped, see below);
  • 003 for zmain (height) in the experimental chamber;
  • 004 for Θ (polar angle) in the experimental chamber;
  • 005 for zprep (height) in the experimental chamber (not connected when not in use).
The LEDs on the left side of the display indicate the actual state (stopped, moving, end-switches...).

Remote control selects the other axis to be controlled (rc.00_ on the display) or its own axis (value on the display).

Speed button selects the speed between low (green LED) for fine slow setting and high (red LED) for coarse fast setting.

The arrows buttons increase or decrease the value.

Stop button stops and blocks all axes. Press it if any software, e.g. KolXPD, is moving the manipulator to a risky position.

Buttons Speed and Stop pressed together unblock the blocked axes.

Several seconds after the last movement the controller saves the actual position into its memory in order not to lose it in case of sudden power failure (indicated by "saved" on the display).


Swapping manipulators

For angle-resolved measurements (ARPES, XPD) the manipulator must be swapped in order to automatically rotate the sample in Θ and Φ directions during the data acquisition. At this point the 5-axes manipulator is moved into the experimental chamber (and its z-range of 500 mm is not fully used) while the 4-axes manipulator is stored in the preparation chamber - top (where it cannot be used due to insufficient z-range being only 300 mm).
  1. Vent the chambers.
  2. Remove the 4-axes manipulator (z 300 mm) from the experimental chamber using the Elettra crane and put it on the teporary support.
  3. Move the 5-axes manipulator (z 500 mm) from the preparation chamber - top into the experimental chamber using the Elettra crane.
  4. Move the 4-axes manipulator (z 300 mm) from the temporary support into the preparation chamber - top using the Elettra crane.
  5. Bake-out the experimental chamber.
  6. Swap the zmain and zprep motor controllers in order to have zmain on the experimental chamber again.
  7. Install and connect the Φ motor at the top of the manipulator.
  8. Connect the Φ endswitch cable.
  9. Connect the Φ motor controller into the zmain motor controller.
  10. Swap the Θ motor with the Θ handle in order to have the motor on the experimental chamber again.

Last Updated on Tuesday, 21 November 2017 09:14