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Research Contents > Beamlines > TEMPO > USERS
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More than 20 projects approved by SOLEIL program commities realized every year.
 The projects are distributed on the two beamline branches: 

  1. UHV photoemisson
  2. Free station user equipment

         Sunset 
  

 
Experimental station configuration
The beamline main experimental station is dedicated to UHV photoelectron spectroscopy experiments. It is composed by a main UHV chamber, a preparation chamber and a manipulator section. The main chamber is equipped with a Scienta SES 2002 electron energy analyser and a LEED system (Specs) placed at the photon beam level. An Omniax manipulator with a travel of 600mm is placed vertically and it can move from the topmost level in the manipulation section to the bottom level for sample transfer.

A mass spectrometer, a differential sputter gun and a parking for three sample holder are placed at the transfer level. The main chamber is pumped by a Turbo pump, an ion pump and a cry pump. All the pumps can be isolated from the main chamber with gate valves. Base pressure is 1x 10-10mbar.
Preparation Chamber
The preparation chamber is equipped with
a heating stage,
a sputter gun,
a leak valve for user treatments,
a mass spectrometer,
a fast entry lock stage,
a transfer rod,
a quartz microbalance
and three CF40 flanges placed in order to install evaporating sources on the axis of the sample at the heating stage level.
On the heating stage sample can be heated in two ways:
1) Current flow (for semiconductors) up to 10 A.
2) Electron bombardment of the sample holder using a filament to emit electrons and polarising the holder up to 1000 Volts.
The transfer rod is equipped with a carousel for four sample holders and is used to bring sample in the main experimental chamber.

The chamber is pumped by a turbo pump and a Liquid Nitrogen trap with a Ti sublimator.
TEMPO sample holders
Sample environment for sample annealing by current flow.

 
Sample holder for semiconducting samples
The materials are Tantalum and Aluminum Nitride.
Temperature range up to ~2000°C
space for sample size 5x10mm
Sample environment for measuring magnetic properties

 
Sample holders to apply a magnetic field (100Oe)
Space for sample size: less than 5x10mm
Material: Molybdenum with 4 M1.4 Tantalum screws
Temperature range up to 2300K
Free station branch
Spot size on the branch line
The spot size has been measured positioning a fluorescent YAG screen at the sample position and taking an image with CCD camera and a calibrated magnification optic placed at about 300 mm. In the figure on the left we show the 3D representation of the photon beam intensity obtained from the image presented in the central figure. It was obtained with an exit slit aperture of 50μ. It is compared to the ray tracing calculation for the same field of view: 300μ x 300μ. The branch-line has been used for the gas phase experiments which characterized the beamline energy resolution and by three external user experimental stations:
- X-PEEM Laboratoire Louis Néel, Grenoble (Jan Vogel)
- NanoESCA , Laboratoire LETI, Grenoble (O. Renault)
- Coherent Scattering experimental station , Sextant Beamline, Soleil (Jan Luning, M. Sacchi)

Spot size image recorded on the TEMPO branch line on a fluorescent screen with a CCD camera.
Shipping goods

Fausto Sirotti
 Ligne TEMPO
 Synchrotron SOLEIL
Orme des Merisiers
 BP 48 - Saint Aubin
 91192 - GIF-SUR-YVETTE
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