Docking vacuum suitcases
=================================

Vacuum suitcases can be docked at either endstation. In all cases:

- the mounting port is CF40
- for connection to UHV chambers (i.e. not the loadlocks) we provide a UHV gate-valve to the chamber and a short T-piece with pumping - only this intermediate section needs to be baked
- the suitcase transfer arm must hold samples by the tag when presenting them to the receiving stations
- the suitcase mounts horizontally
- there is ample space - suitcase lengths of at least 2m will fit.


A-endstation (HR-ARPES)
--------------------------

Prep main (1e-10mBar)
^^^^^^^^^^^^^^^^^^^^^^
- Samples are loaded directly on to the 4-axis manipulator, so some misalignment can be tolerated
- The transfer arm must have sufficient stroke for the center of the sample plate to extend 250mm past the last flange of the suitcase gate-valve. This is a conservative estimate, contact beamline staff if your suitcase stroke is close to this limit.
- The small connecting T-piece is typically baked for 6-12 hours. Fans are available to keep the suitcase cool. Water lines are available if the suitcase incorporates water cooling.


Prep sec (1e-10mBar)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Samples are loaded directly on to the vertical 4-axis manipulator, so some misalignment can be tolerated
- The transfer arm must have sufficient stroke for the center of the sample plate to extend 235mm past the last flange of the suitcase gate-valve. This is a conservative estimate, contact beamline staff if your suitcase stroke is close to this limit.
- The small connecting T-piece is typically baked for 6-12 hours. Fans are available to keep the suitcase cool. Water lines are available if the suitcase incorporates water cooling.


Loadlock (<5e-9mBar if baked)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Samples are loaded on to the 6-slot carousel. There is no possibility to adjust the carousel height or angle, so your suitcase will very likely need some degrees of freedom on the transfer arm
- The transfer arm must have sufficient stroke for the center of the sample plate to extend 100mm past the last flange of the suitcase gate-valve.
- Unlike the preparation chambers there is no connecting T-piece - the loadlock is typically vented in order to attach or remove the suitcase. 
- For the best pressure the viton-sealed fast-access door should be replaced and the loadlock given an overnight bake with heating tapes
- This is the usual attachment point for 'inert-gas suitcases', e.g. samples that have been transferred from a glovebox in an argon overpressure. 


.. image:: /_static/suitcases/Astation.png
  :align: center



B-endstation (SPIN)
-------------------------

Loadlock (<5e-9mBar if baked)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Identical design and considerations as the A-endstation loadlock, except here the receiving carousel has vertical adjustment

Storage chamber (1e-10mBar)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Minimum stroke 250mm (if a short T-piece is installed). This is a conservative estimate, contact beamline staff if your suitcase stroke is close to this limit.

Preparation chamber (1e-10mBar)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Identical design and considerations as the A-endstation Prep sec chamber, except the gate-valve is not currently installed so a vent-bake cycle of the entire chamber is required - contact beamline staff well in advance if you think you will need this.

.. image:: /_static/suitcases/Bstation.png
  :align: center