Standard Configurations

Current Run - Run 17

AMO Standard Configuration for Run 17

#1 Imaging

The LAMP endstation in AMO

A time-resolved, molecular and cluster imaging configuration, optimized for gas-phase/cluster experiments in the soft x-ray range will be offered as a standard configuration. The configuration is capable of measuring time-resolved, single-frame images, and ion time-of-flights of gas phase molecular/cluster systems in a skimmed molecular beam.  Forward scattered X-rays will be detected by one large area pnCCD while photo-ions from the event will be detected orthogonal to the scattering plane.

See the detailed description of the AMO Standard Configuration #1

Time-resolved experiments employing tunable femtosecond pulses will be supported under this standard configuration. The fundamental and harmonics (800 and 400 nm) of the AMO, ~50 fs Ti:Sapphire laser will be available along with a tunable (1300 - 2400 nm) optical parametric amplifier. The laser is delivered to the sample collinearly with the x-rays.

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. The technical details of the standard configurations and the table of required parameters. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the AMO instrument staff (srd-sxd@slac.stanford.edu).

#2 Spectroscopy

The LAMP endstation in AMO

The atomic/molecular spectroscopy configuration will offer an experimental setup optimized for gas-phase spectroscopy experiments in the soft x-ray range. The configuration is capable of measuring time-resolved photoelectron spectra of gas phase molecular systems in a skimmed molecular beam. Photoelectrons are collected with either a high resolution hemispherical analyzer (Scietna) or a downstream electron velocity map imaging (VMI) spectrometer.

See the detailed description of the AMO Standard Configuration #2

Time-resolved experiments employing tunable femtosecond pulses will be supported under this standard configuration. The fundamental and harmonics (800 and 400 nm) of the AMO, ~50 fs Ti:Sapphire laser will be available along with a tunable (1300 - 2400 nm) optical parametric amplifier. The laser is delivered to the sample collinearly with the x-rays.

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. The technical details of the standard configurations and the table of required parameters. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the AMO instrument staff (srd-sxd@slac.stanford.edu).

CXI Standard Configuration for Run 17

Liquid Jets with the CXI 1 micron Focus

CXI will be configured to use the 1 micron KB focus inside the 1 micron sample chamber. The liquid jet mechanical system will be available and any sample delivery system compatible with this mechanical system using the standard nozzle rods will be supported. This includes Gas Dynamic Virtual Nozzle (GDVN), Lipidic Cubic Phase (LCP), the Microfluidic Electrokinetic Sample Holder (MESH), or other viscous extrusion systems, many types of mixing nozzles and any other system that can be mounted on the nozzle rod. The CXI sample chamber will be equipped with an on-axis jet viewing system as well as a perpendicular high resolution jet imaging system. A post-sample attenuator mount can be available if needed. Also supported will be time-resolved experiments employing either: a nanosecond optical parametric oscillator (410-2200 nm); the fundamental (800 nm) or second harmonic (400 nm) of the CXI ~50-150fs Ti:Sapphire laser; or a wavelength accessible by the CXI femtosecond optical parametric amplifier (480-2400 nm). The pump laser beam will be delivered collinear to the x-ray beam with in-coupling ~250 mm upstream of the sample with a focal length of ~300mm. The CXI time tool will be available for fs laser experiments. Users should expect that only one of the multiple laser options can be supported for a given experiment.

With this standard configuration, CXI will be able to support Serial Femtosecond Crystallography (SFX) experiments with or without a pump laser and Small Angle and Wide Angle X-ray Scattering (SAXS/WAXS) with or without a pump laser using a wide variety of sample delivery methods, either LCLS-owned or supplied by the user groups. Two full size CSPADs can be available, one for high angle close to the sample with a second detector downstream if absolutely necessary. The second CSPAD will typically be used for Protein Crystal Screening (PCS) by another group parasitically using the beam passing through the whole in the front detector. Users of the standard configuration at CXI should expect PCS beamtime running at the same time and their beamtime.

See the detailed description of the CXI Standard Configuration

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the  table of required parameters. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the instrument staff.

MEC Standard Configuration for Run 17

X-Ray Diffraction or Thomson Scattering on Shocked Material

Two variations of the standard configuration are available: the X-ray diffraction variation (XRD) and Thomson scattering variation (XRTS). User supplied detector cannot be fielded in either standard configuration. User may request all standard MEC beamline devices and diagnostics, and the request needs to be explicitly mentioned in the proposal.

See the detailed description of the MEC Standard Configuration

To be considered for scheduling in either standard configuration, users will be required to add a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the table of required parameters. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so Users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the MEC instrument staff.

MFX Standard Configuration for Run 17

#1 Goniometer system with sample mounting robot

The Macromolecular Femtosecond Crystallography (MFX) instrument will be configured to perform crystallography experiments using fixed-target samples. A goniometer system developed by the Structural Molecular Biology (SMB) team at SSRL will be deployed in the MFX hutch for this purpose. The system consists of a goniometer with scanning and rotation capabilities to precisely orient and scan crystals, and an on-axis, (visible and NIR light compatible), sample microscope. The crystals can be mounted on grids, chips, loops, meshes or any standard mounting system already supported by the SMB group. The incident photon energy is preferred to be 9.5 keV but justified deviations can be considered. The x-ray focus can vary over a range of ~2-3 µm to ~100 µm. Measurements at cryo-cooled temperatures or room temperature will be possible. The setup includes the option of an on-axis cryo-cooler to maintain crystals at temperatures of 278 to 100K during the measurements or an Arinax humidity control instrument may be requested for controlled humidity (30.0 % to 99.8 % RH) during measurements at ambient temperatures. A sample exchange robot, the Stanford Automated Mounting (SAM) system, may be used to exchange samples on compatible magnetic bases held in SSRL cassettes or uni-pucks from inside a liquid nitrogen filled storage Dewar. Samples at ambient temperatures may be mounted from 10 sample base storage locations on the side of the SAM robot. The detector is a Rayonix 325MX that operates at 1 Hz. The control of data collection will be performed using Blu-Ice/DCSS. No pump laser will be provided.

More detailed information on what is supported by the standard SMB suite of capabilities for sample mounting, data collection modes, etc. can be found at smb.slac.stanford.edu.

Use of this Standard Configuration is contingent on acceptance by the users to use the following acknowledgment in any presentation or publication: "The SSRL Structural Molecular Biology Program is supported by the DOE Office of Biological and Environmental Research, and by the National Institutes of Health, National Institute of General Medical Sciences (including P41GM103393). The contents of this publication are solely the responsibility of the authors and do not necessarily represent the official views of NIGMS or NIH."

See the detailed description of the MFX Standard Configuration #1

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the table of required parameters of the MFX Standards Configuration #1. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the LCLS instrument staff or the SMB support staff.

#2 Helium-Rich Ambient (HERA) instrument for time-resolved liquid jet crystallography

The Macromolecular Femtosecond Crystallography (MFX) instrument will be configured to perform crystallography experiments with liquid jets inside a helium filled enclosure. A liquid jet mechanical system will be available to move the jet and any sample delivery system compatible with this mechanical system using the standard nozzle mount will be supported. This includes Gas Dynamic Virtual Nozzle (GDVN), Lipidic Cubic Phase (LCP), the Microfluidic Electrokinetic Sample Holder (MESH), or other viscous extrusion systems, many types of mixing nozzles and any other system that can be mounted on the nozzle mount. The system will be equipped with an on-axis jet viewing system as well as a perpendicular high resolution jet imaging system. Also supported will be time-resolved experiments employing either a nanosecond optical parametric oscillator (410-2200 nm). The pump laser beam will be delivered at ~60 degree from collinear to the x-ray beam with minimum lens distance of ~150mm. The incident photon energy is preferred to be 9.5 keV but justified deviations can be considered. The x-ray focus can vary over a range of ~2-3 µm to ~100 µm.

With this standard configuration, MFX will be able to support jet-based Serial Femtosecond Crystallography (SFX) experiments at atmospheric pressure and temperature with noise minimization from the Helium environment. This will be possible with or without a pump laser. Also supported will be Small Angle and Wide Angle X-ray Scattering (SAXS/WAXS) with or without a pump laser using the wide variety of sample delivery jets, either LCLS-owned or supplied by the user groups. The detector will be a Rayonix 170 capable of 10 Hz operation with 1920x1920 pixels.

Use of this Standard Configuration is contingent on acceptance by the users to use the following acknowledgment in any presentation or publication: "The HERA system for in helium experiments at MFX was developed by Bruce Doak and funded by the Max-Planck Institute for Medical Research."

See the detailed description of the MFX Standard Configuration #2

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the  table of required parameters of the MFX Standards Configuration #2.  No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the instrument staff.

SXR Standard Configuration for Run 17

#1: The XAS, XMCD, and Small Angle Scattering Configuration

The Resonant Absorption & Scattering configuration will offer an experimental setup optimized for transmission absorption and small angle scattering experiments in the soft x-ray range. The configuration is capable of measuring time-resolved XAS of solid-state samples in a transmission geometry. The setup is optimized to use the x-ray polarization control via the Delta undulator as well as the high-power fixed linear polarizations available from the LCLS normal operation.

X-ray transmission is measured by dividing in two and focusing the x-ray beam with a diffractive optic. The transmitted beam is placed in one of the two beams while with no sample in the other beam.   Both beams diverge and illuminate a pnCCD detector that is 2.5 m downstream of the diffractive optic.  The transmission is measured on each shot by comparing the signal on the detector for the beam transmitted though the sample with the reference beam.  This method can measure transmission with a sensitivity of 1% per shot and is compatible with 120Hz operation.   The avalible diffractive optic can operate between 475 and 600 eV.   However, additional energy ranges may be possible—for feasibility please contact us (srd-sxd@slac.stanford.edu) before submitting the proposal.    

To control the spot size on the sample it can be moved 130 to 155 mm downstream of the diffractive optic.    The separation of the two beams at the sample position is roughly 2-3mm.  Therefore samples must be located within 1.5 mm of the edge their substrate.   The setup can accommodate four 3mm TEM grid type samples.   Other sample geometries are possible for a user provided sample holder.   Contact us (srd-sxd@slac.stanford.edu) for interface specifications.    

The sample holder can accommodate for some temperature control ~200K to 400K.   Or an electromagnet can be used to control the magnetic field on the sample. 

Small angle scattering data may be collected using an in-vacuum pnCCD as well.  The pnCCD is 76 mm wide and is located is located 2.5 m downstream the sample holder.

Time-resolved experiments employing tunable femtosecond pulses will be supported under this standard configuration.  The fundamental and harmonics (800, 400 and 267 nm) of the SXR, ~50 fs Ti:Sapphire laser will be available, delivered to the sample at ~5 degrees off axis with respect to the x-ray beam.  The small angle scattering geometry can also be used with a TOPAS-Prime Optical Parametric Amplifier (OPA) capable of 480-2400 nm output. 

See the detailed description of the SXR Standard Configuration.

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations.  If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal.  The technical details of the standard configurations and the table of required parameters. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information.  Address any questions to the SXR instrument staff.

#2: The RSXS end station in SXR

The Soft X-Materials hutch (SXR) will offer the RSXS end station to focus on time-resolved pump-probe resonant soft x-ray scattering and diffraction in the study of temporal dynamics in charge, spin, orbital, or lattice order in solid state materials. This end station is capable of achieving sample environment base pressures better than 10-8 Torr, and a sample loading/transfer system is installed for the rapid change of samples. In addition to the typical scattering angle in the horizontal plane (Θ), a motorized sample stage allows the sample to be rotated azimuthally about its surface normal (Φ) and to be pivoted in the vertical plane (χ). This sample stage is thermally contacted to a temperature control system, consisting of a liquid Helium cryostat and a heater, allowing the sample temperature to be changed from 15 K to 400 K. There are total six degrees of freedom for the sample: three translational (x, y, z from manipulator) and three rotational degrees of freedom (Θ,χ,Φ) with a differentially pumped rotary seal. The setup can be used with or without the ~100 fs SXR pump laser, which will deliver pulses of one wavelength per experiment from 800 nm, 1150-2400 nm or 4-17 microns. Pump pulses will be collinear with the x-rays.

This end station has two avalanche photodiodes and a multi-channel plate (MCP) detector. These detectors are mounted on a fully motorized in-vacuum detector stage, allowing detector manipulation in both horizontal (360 degrees) & vertical (90 degrees) scattering planes. Such capability can be used to efficiently search for super-lattice reflections over the full range of reciprocal space. X-ray absorption (XAS) measurements may also be performed by measuring total fluorescence yield. 

A newly commissioned, varied line-space plane grating spectrometer, optimized to operate from 250 eV to 2000 eV with an expected resolving power of 1500 to as high as 3000 at lower energies will be offered as well, enabling FEL based RIXS studies.  The spectrometer can operate outside of the optimized energy range with compromised performance. The spectrum is detected with an in-vacuum CCD binned along the spectral energy direction to enable 120Hz readout.   In this standard configuration, the spectrometer is mounted 90° to the x-ray beam in the horizontal plane.

See the detailed description of the SXR Standard Configuration #2.

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the technical details of the standard configurations and the table of required parameters. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the instrument staff.

XCS Standard Configuration for Run 17

#1 Time-resolved solution scattering/emission spectroscopy

The X-ray Correlation Spectroscopy instrument will be configured to study time-resolved solution scattering and/or emission spectroscopy. The incident photon energy will be fixed to 9.5 keV (deviations will be considered but not promised) and can be either monochromatic using the large offset double crystal monochromator using diamond 111 or with pink beam delivered by the XCS periscope. The setup will consist of a helium purged sample environment, a round or flat liquid jet and the sample recirculation system driven by HPLC pumps, a CSPAD-2.3M detector for wide angle x-ray scattering measurements and a von Hamos spectrometer with a CS140k detector for x-ray emission spectroscopy measurements. The spectrometer will be available for any of the following emission lines: Mn Kß1,3, Kß2,5 and Kα, Fe Kß1,3 and Kß2,5, Co Kß1,3 and Kß2,5, Ni Kß1,3 and Kß2,5, Ti Kß1,3 and Kß2,5 and V Kα. A femtosecond optical pump laser in collinear geometry with a wavelength in the range of 480-2400 nm will be available.

See the detailed description of the XCS Standard Configuration.

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the table of required parameters for Standard Configuration. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the instrument staff.

#2 Time-resolved hard X-ray scattering and diffuse scattering measurements on thin films

The X-ray Correlation Spectroscopy instrument will be configured to study time-resolved scattering on condensed matter systems in the form of thin films. The incident photon energy will be fixed to 9.5 keV (deviations will be considered but not promised) and will be monochromatic using the large offset double crystal monochromator using diamond 111. The sample will be mounted inside a helium enclosure to reduce air scattering background and is mounted flat on the sample holder (sample surface is horizontal at 0 degree incidence angle). The X-ray incidence angle can be adjusted as well as the rotation axis perpendicular to the sample surface. This setup is suited for low incidence angle (~0.5 to 5 degrees) with a minimum detector distance of 120mm. A CSPAD detector will be mounted downstream of the Helium enclosure for measuring the forward scattering. Motorized XYZ motions are available to position the detector perpendicular to the incoming X-ray beam. In addition to the 800/400 nm 50 fs Ti:Sapphire fundamental/2nd harmonic wavelengths, an OPA will be available to cover the wavelength range of 480-2400 nm. The optical pump beam will be propagating collinearly with the X-ray beam with about 2 degree crossing angle.

See the detailed description of the XCS Standard Configuration.

 

XPP Standard Configuration for Run 17

#1 Kappa goniometer for time-resolved diffraction

The X-ray Pump Probe instrument will be configured for time-resolved X-ray diffraction. The setup will consist of a Kappa goniometer for sample manipulation with all 6 degrees of freedom, and a CS140k detector mounted on the detector robot arm for measurement of the diffracted x-rays over most of the upper reciprocal hemisphere. The incident photon energy will be fixed to 9.5 keV (deviations will be considered but not promised) using monochromatic beam delivered by the large offset double crystal monochromator using diamond 111. The Oxford nitrogen cryostream can be used to control the sample temperature down to 100 K. A femtosecond optical pump laser in collinear geometry with a wavelength in the range of 480-2400 nm will be available.

See the detailed description of the XPP Standard Configuration.

To be considered for scheduling in this standard configuration, users will be required to include a table in the proposal that lists the specific experimental parameters to ensure compatibility with these configurations. If the experimental parameters are not compatible with the standard configuration or if the table of parameters is incomplete, the proposal will be reviewed and considered for scheduling as general user proposal. Please see the table of required parameters for Standard Configuration. No fundamental changes to the standard configurations will occur, but some details of the configuration may be updated in response to inquiries, so users should recheck the website before submitting your proposal to confirm that you have the latest information. Address any questions to the instrument staff.

#2 X-ray absorption spectroscopy (XANES) of 3d transition metals

The X-ray Pump Probe instrument will be configured for time-resolved pump-probe hard x-ray absorption spectroscopy measurements (XANES on the K-edge of 3d transition metals) in solution phase. A helium purged sample chamber will be used to house the liquid jet, with Kapton windows to allow the absorption signal to be measured by detectors outside the chamber. Liquid jet driven by HPLC pumps will be used to deliver the sample into the interaction point. An epix100k detector will be mounted on one side of the sample chamber and a photodiode on the other. The X-ray energy will be scanned with the XPP channel cut monochromator (CCM) using Si(111) crystals (~4.5 to 10 keV). We expect an average photon flux of 1010/pulse after the monochromator. Refractive Be lens will be available to deliver a beam size ranging from 10 to 200 um at the sample. 1D focusing is available as well. A femtosecond optical pump laser in collinear geometry with a wavelength in the range of 480-2400 nm will be available.  Please see the table of required parameters for Standard Configuration.

See the detailed description of the XPP Standard Configuration.