PHOTON SCIENCE

I. General specifications

Beamline calculations can be viewed here (PDF file)

Full beamline layout incl. P61B (click for larger view)

The OH houses a continuous variable thickness absorber (choice between Cu or C) and beam defining power slits.

The EH houses a long radius detector goniometer where different detectors can be mounted, an HPGe detector portal, a high-speed scintillator camera and a heavy load diffractometer. A heavy load Eulerian cradle can be mounted on top of the heavy load diffractometer. In most experiments, sample or sample environments are mounted on the heavy load diffractometer or Eulerian cradle. A 3 m long space is available behind the diffractometer for roll-in, roll-off setups, or for sample environments which cannot be mounted on the diffractometer. The detector portal and camera can be moved around the hutch to address each experiment’s needs.

II. Positioning Instruments

Heavy Load Diffractometer

Load capacity: 1 ton centered, 600 kg off center

Max distance from mounting platform to beam: 450 mm

Axis names:

Eulerian Cradle

Load capacity: 20 kg 

Sphere of confusion: <50 µm

Max distance from mounting platform to beam: 200 mm

Axis names:

Examples of clamps and different samples mounted on the cradle:

The slider object does not work in manage or preview mode.

Goniometer

The goniometer has two arms (which can be used simultaneously and moved independently) aligned with a vertical scattering plane. Routinely, one of the arms carries an HPGe detector. User supplied detectors can be mounted as well.

Detector Portal

The detector portal has two arms carrying an HPGe detector and associated motorized double slits. Both arms can be independently positioned in four degrees of freedom (translation on x and z, rotation around x and z). The angular movement ranges on routine operational conditions are shown below:

Movement ranges depend on the relative position between detector portal and sample. The position of one detector arm can limit the movement range on the other arm. Larger and lesser angles are possible when non-routine detector arm and detector portal positions are used.

III. Detectors

HPGe Detectors

The beamline is equipped with three HPGe detectors (Mirion) with associated Xspress3 readout units (Quantum Detectors).

Scintillator camera

The camera is comprised of a scintillator mount, 5 or 10 x magnifying optics, and a Phantom v2640 camera sensor. Routinely, 400 µm GaGG+ scintillators are used, although other scintillators are possible.

*Higher frame rates are possible if the image size is cropped.

IV. Infrastructure

The experimental hutch is equipped with signal, power and media lines for supporting user experiments. A manually operated bridge crane is available for mounting/unmounting instruments inside the hutch.

Bridge Crane:

2 ton load capacity, max hook height: 3.5 m (door height: 2 m).

Signal:

Patch panel routed to control hutch containing several BNC, SHV and AB ethernet ports.

Power:

Besides standard power plugs, 5 pole CEE connectors are available for 400V and 16A, 32A and 64A.

Media:

• Compressed air, 6.5 Bar. Connector: DN 7,2 Type 26, 6 mm.*
• Cooling water (usage of cooling water requires pre-approval from Petra infrastructure groups, please contact the beamline staff in advance).
• N2, 0.5 Bar. Connector: 10 mm Swagelok quick connector. *
• Inert gas lines (routed to gas bottle cabinet outside the hutch). Connector: 6mm Swagelok fitting. *
• Gas exhaust ports. Connector: KF40

*There are adaptors on site for common hose and tube sizes. If specific communication or signal cables are needed, they can be routed outside of the hutch through the access chicanes.

Connector layout:

V. Control/Data analysis