PETRA III at DESY
P10 Coherence Applications

The Coherence Beamline P10 at PETRA III benefits from the outstanding brilliance of the PETRA III storage ring. The beamline operates in the medium-hard x-ray regime (5-20keV) and aims to make the full coherent flux of the synchrotron radiation avilable for experiments. The beamline serves two main experimental goals: Investigation of sample dynamics in the range from microseconds to seconds by X-ray Photon Correlation Spectroscopy (XPCS) and Coherent imaging of micro- and nanostructures.

The beamline has developed several setups to serve a large variety of (coherent) scattering experiments. Please check the beamline side to see if P10 can be of use for your experiments.

Beamline Energy Resolution
1.12 [eV] @ 8000 [eV]
Beamline Resolving Power
1.4 * 10-4 [deltaE/E] @ 8000 [eV]
Beamline Energy Range
5000 - 20000 [eV]
Max Flux On Sample
2 * 1011 [ph/s] @ 8000 [eV]
Spot Size On Sample Hor
0.3 - 200 [um]
Spot Size On Sample Vert
0.3 - 200 [um]
Transverse Coherence Length At Sample Position Vert Value
100 - 300 [um]
Transverse Coherence Length At Sample Position Hor Value
50 - 150 [um]
Photon Sources

5m U29

Type
Undulator
Available Polarization
Linear horizontal
Source Divergence Sigma
X = 30 [urad], Y = 5 [urad]
Source Size Sigma
X = 40 [um], Y = 7 [um]
Deflection Parameter K
2.2
Number Of Periods
168
Period
29 [mm]
Monochromators

FMB Oxford PETRA III monochromator

Energy Range
5000 - 20000 [eV]
Type
The monochromator contains 2 switchable crystal optics, a Si(111) fixed exit offset crystal pair and a polished Si(111) channelcut crystal with a gap of 11.58mm. The channelcut optics has a high energy cutoff of ~16keV.
Resolving Power
1.4 * 10-4 [deltaE/E] @ 8000 [eV]
Other Optics

Horizontal deflecting flat mirror pair

Description
The beamline utilizes a pair of Silicon mirrors (length: 600mm; distance: 900mm) with three stripes (Silicon, Rhodium and Platinum) for higher harmonic suppression. The mirrors are located at 41.5m along the beamline).
Endstations or Setup

P10-4C

Description
The P10-4C setup in the 2nd experimental hutch of P10 is based on a 4-circle Huber diffractometer. This diffractometer is mounted on a granite support and can be moved out of the beam path on air pads to be replaced with the P10-GINIX setup. The diffractometer is based on a combination of a Huber 440 and 430 goniometer sitting on a YZ translation. For most experiments the 440 goniometer is used as the rotational bearing for the 5 m long detector arm. On top of the goniometers a tower of Huber stages (170mm x 170mm area) is mounted. In the typical configuration it offers XYZ translations (XY: Huber 5102.20; Z: Huber 5103.A20-40) as well as a 2-circle segment (Huber 5203.20) for rotations around X & Y. A DN100 (6" flange OD) vacuum cube is used as the standard cell for the sample environment. Examples for different sample cell inserts are shared with the P10-USAXS setup and can be found on the P10 Homepage.
For experiments in SAXS geometry, the sample cell is fully vacuum integrated. It is connected along the X-ray beam direction with DN40 (2.75" Flange OD) bellows. Upstream of the sample environment sits a pair of JJ X-Ray slits (IB-C30-HV) on a Huber YZ stage. Between the slits is a vacuum integrated monitor unit. Downstream of the sample environment a 6-way cross (4" tube ID) followed by a DN100 gate valve connects the sample region via a 5 m long flightpath to the detector region. This part is similar to the P10-USAXS setup.
The P10-4C setup is mainly used for XPCS or CDI experiments in SAXS or WAXS configuration. It offers a relatively large area to integrate complex user sample environments.
The setup offers the possibility to unfocused or focused X-ray beams. Three different coherent focusing options are available [i) f~0.44m, ~0.7micron x 1.0micron; b) f~1.57m; ~2.0micron x 3.0micron and c) f~16.3m; 10micron x 15micron].
Images can be found on the P10 Homepage
Base Pressure
1 * 10-5 [mbar]
Detectors Available
EIGER X4M
LAMBDA 750K
Endstation Operative
Yes

Sample

Other Sample Type
quiet diverse, please discuss with beamline staff

Techniques usage

Imaging / X-ray holography
No
Imaging / X-ray microscopy
No
Imaging / X-ray tomography
No
Scattering / Coherent scattering
Yes
Scattering / Small angle scattering
Yes
Scattering / Time-resolved scattering
Yes
Scattering / Wide angle scattering
Yes

P10-6C

Description
P10-6C is a setup based on a large 6-circle diffractometer by Huber. The setup allows to conduct coherent scattering experiments at large scattering vectors Q. The setup is used in combination with a compound reflective lens based on Beryllium lenses with a Radius of 50 microns by RXOptics. For BraggCDI experiments, the lens is situation about 0.5m before the sample and the X-ray beam is typically focused to a size of about 0.7micron x 1.1micron at the sample position. Large area detectors detectors can be mounted up to a distance of ~1.85m away from the sample. Several microscopes (inline, vertical and horizontal can be used to aligning/finding the sample. An Amptek SDD detector is available from the detector pool and can be used to find the sample by using the fluorescence signal. Other focuusing options are available for wide-angle XPCS exeriments.
Detectors Available
EIGER X4M
LAMBDA 750K
Endstation Operative
Yes

Sample

Sample Type
Other: nano objects, metallic glasses, oxide glasses
Mounting Type
needs to be discussed on case by case basis

Techniques usage

Imaging / X-ray holography
No
Imaging / X-ray microscopy
No
Imaging / X-ray tomography
No
Scattering / Coherent scattering
Yes
Scattering / Small angle scattering
No
Scattering / Time-resolved scattering
Yes
Scattering / Wide angle scattering
Yes

P10-GINIX

Description
The Göttingen Instrument for Nano-Imaging with X-Rays (GINI-X) is a dedicated endstation for coherent nano-diffraction and imaging at the Coherence Beamline P10. It is located in the second experimental hutch (EH2). The instrument has has been designed and installed by the group of Prof. Dr. Tim Salditt ( http://www.roentgen.physik.uni-goettingen.de ) in collaboration with Dr. Michael Sprung at P10 and the PETRA III project team. A powerful Kirkpatrick-Baez (KB) mirror system and a modular system of additional optical elements can be used for beam definition, filtering and focusing with spot sizes in the range from 500 nm down to 5 nm.
Three classes of experiments are routinely carried out: scanning X-ray transmission microscopy (STXM) and nano-diffraction, ptychographic imaging and in particular cone beam propagation imaging/tomography. The later is also known as near-field or holographic imaging. A unique feature of the instrument is the combination of KB focusing with waveguide optics, resulting in unparalleled clean and coherent wavefronts ideally suited for quantitative near-field phase retrieval. More specialized modalities comprise nano-focus wide angle diffraction experiments, scanning fluorescence microscopy, coherent diffraction in reflection geometry, as well as combinations of nano-focus experiments with ultra-fast time resolution (synchronization to a bunch clock).
The construction and operation is funded by Georg-August Universität Göttingen and BMBF Verbundforschung “Struktur der Materie”, projects 05KS7MGA, 05K10MGA, and 05K13MG4.
Instrumentation and Characteristics:
GINI-X is installed on a 5-axis table (IDT), that is movable on air pads and can be exchanged with the standard P10-4C setup. At the heart of GINI-X, two total reflection mirrors in Kirkpatrick-Baez geometry placed in a vacuum vessel provide a two-dimensional hard X-ray focus down to about 200 nm × 200 nm in air, with a free working distance of about 16 cm between the vessel exit window and the focal plane. The accessible energy ranges are 6-10.5 keV and 11.5-14.0 keV. The X-ray beam can be shaped, cleaned and filtered at different positions with slits, pinholes and waveguides. Beamstops to protect detectors can be inserted at various positions.
The sample is handled by a three-axis piezo on top of two rotations and large-scale stepper motors, allowing for movements of a few nanometres up to hundreds of millimetres. An air-bearing rotation for reduced wobble is installed for tomography applications. Two optical in-line microscopes can be used for visual alignment and observation of the sample. Radiation damage can be reduced using the additional option of a cryojet.
Detectors can be placed in a front (at a distance of 400-800 mm from the focus) or rear position behind the large flight path (at a distance of ~5.0 meters from the focus). The instrument is fully operated using SPEC, with essential P10 components included via Tango. All X-ray detectors (and user defined ROIs) can be used as counters by virtue of the Göttingen Live Viewer software. Fast STXM is available with on-line analysis.
Detectors Available
EIGER X4M
Endstation Operative
Yes

Sample

Sample Type
Other: quite diverse; please discuss

Techniques usage

Imaging / X-ray holography
Yes
Imaging / X-ray microscopy
Yes
Imaging / X-ray tomography
Yes
Scattering / Coherent scattering
Yes
Scattering / Small angle scattering
Yes
Scattering / Time-resolved scattering
Yes
Scattering / Wide angle scattering
No

P10-USAXS

Description
The P10-USAXS setup is very similar to the P10-4C setup in the 2nd experimental hutch of P10. It is mounted on a 5-axis optical table from IDT. In front of the sample position, it features a pair of slit from JJ X-Ray (IB-C30-HV). These slits are ~700mm apart. Beamsizes larger than 50x50 microns can be defined by an in-vacuum JJ X-ray slit about 3m upstream of this slit pair. For these cases, both slits on the IDT table act as guard slits to suppress most of the slit scattering of the defining slit. Beamsizes smaller than 50x50 microns should be defined by the first slit of the pair. In this case only the second slit can act as a guard . Between the slits an in-vacuum (retractable) monitor unit is installed and just before the slits a DN40 gatevalve.
The sample chamber is based on a DN100 (6" flange OD) UHV cube. The cube is mounted on a 4-axis Huber tower (X, Y, Z and RZ). The cube is fully vacuum integrated using DN (2.75" flange OD) bellows along the X-ray beam direction. Multiple different sample inserts have been developed to be housed in the sample chamber (e.g. transmission and reflection setups, which are listed on the P10 homepage under EH2/Standard Setup/Sample Inserts). The sample position is followed by a DN100 (6" flange OD) 6-way cross. This 6-way cross allows e.g. to mount in-vacuum detector (e.g. diodes) as well as a vacuum pumping system. The last piece of the sample environment is a DN100 gatevalve. Both, the DN40 and DN100 gatevalve can be used to isolate the vacuum section of the P10-USAXS setup.
The scattered signal is transported to the end of the hutch in a 4" ID tube. There the tube diameter increases to 8" ID and the beam transport continues to the detector stage in the 2nd experimental hutch. By using a detector position at the end of EH2, a sample-to-detector distance of ~21.3 m is realized.
The setup is modular and it is envisioned that components can be removed from the IDT 5-axis table to make room for more complicated experimental setups. The optical table is equipped with a 1.50m x 1.00m large breadboard (mounting holes are M6 on a 25mm x 25mm grid). All optical tables at P10 are designed to have a 600mm distance between X-ray beam and table top surface.
Base Pressure
1 * 10-5 [mbar]
Detectors Available
EIGER X4M
LAMBDA 750K
Endstation Operative
Yes

Sample

Sample Type
Amorphous, Powder, Liquid

Techniques usage

Imaging / X-ray holography
No
Imaging / X-ray microscopy
No
Imaging / X-ray tomography
No
Scattering / Coherent scattering
Yes
Scattering / Small angle scattering
Yes
Scattering / Time-resolved scattering
Yes
Scattering / Wide angle scattering
No
Detectors

EIGER X4M

Type
DECTRIS EIGER X4M
Time Resolved
Yes
Pixel Size
X = 75 [um], Y = 75 [um]
Array Size
X = 2070 [pixel], Y = 2167 [pixel]
Thickness
300 [um]
Passive or Active (Electronics)
Active

Detection

Detected Particle
Photon

LAMBDA 750K

Type
LAMBDA 750K detector from X-SPECTRUM
Pixel Size
X = 55 [um], Y = 55 [um]
Array Size
X = 1536 [pixel], Y = 512 [pixel]
Thickness
300 [um]
Passive or Active (Electronics)
Active
Dynamic Range
1 * 105

Detection

Detected Particle
Photon
contacts
Michael Sprung
Fabian Westermeier
Daniel Weschke
Techniques
Imaging
  • X-ray holography
  • X-ray microscopy
  • X-ray tomography
Scattering
  • Coherent scattering
  • Small angle scattering
  • Time-resolved scattering
  • Wide angle scattering
control/Data analysis
Control Software Type
  • Sardana, Tango, Python
Data Output Type
  • images, correlation-functions, parameters like temperature
Data Output Format
  • detector dependent: hdf5, - ascii, tif, cbf/edf, ...
Softwares For Data Analysis
  • in-house, XPCSGUI