TXI - Tender X-ray Instrument
Instruments
- chemRIXS/qRIXS
- CXI - Coherent X-ray Imaging
- MEC - Matter in Extreme Conditions
- MFX - Macromolecular Femtosecond Crystallography
- TMO - Time-resolved AMO
- TXI - Tender X-ray Instrument
- XCS - X-ray Correlation Spectroscopy
- XPP - X-ray Pump Probe
- SLAC MeV-UED
- LCLS-II-HE Instruments
- CXI Upgrade
- MFX Upgrade
- DXS – Dynamic X-ray Scattering
- XPP Upgrade
- Instrument Maps
- Standard Configurations
Top Links
LCLS Instruments
There are three primary goals for the Tender X-ray Imaging (TXI) instrument:
- A beamline designed to incorporate X-ray Pump and X-ray Probe techniques especially in the emerging field of nonlinear X-ray science.
- A general purpose coherent scattering/forward diffraction instrument for sub-micron samples covering the "tender" X-ray range. Which is loosely defined to be between the Si K edge of 1.8 keV, and the Fe K edge of 7.1 keV.
- And a system to conduct tender X-ray spectroscopy measurements.
Endstation Description
The operational challenge for the NEH 1.2 instrument development is the minimization of overhead associated with changing experiment types while maintaining flexibility to explore new and developing methods and science. These challenges will be met with a fixed end stations and sample chamber. The primary sample chamber will have a well defined, standardized kinematic mounting system for mechanical equipment inside the large sample vacuum chamber. Additionally standardized motor, power/signal and liquid/gas sample feedthroughs will be provided and documented for use by all user groups. This will allow for the interchangeability of user provided mechanical systems to improve flexibility and allow for assembly and maintenance outside of the hutch.
An ePix10k-HR detector will be used as the primary forward scattering detector. The detector is designed for highest efficiency in the 2 to 5 keV photon energy, It will have >2 MPixels with each pixel being able to be single photon as well as provide a dynamic range of 10,000 photons per pixel. The forward scattering detector will collect scattering up to 3 Angstroms resolution. Additionally a downstream detector will be provided that is located >1 m away from the interaction point. This will provide a flexible detector geometry for nonlinear interactions.
Specifications
Parameter | Required | Goal | Comment |
---|---|---|---|
Photon Energy Range SXU [eV] Photon Energy Range HXU [eV] |
1250-5000 1750-7000 |
250-5000 1000-7000 |
Need to reject harmonics outside of required range |
ΔE / E SXU ΔE / E HXU |
SASE SASE |
1 x 10-3 1 x 10-4 |
Desired Seeded on SXU and delay line will double as monochromator on HXU |
Beamline Transmission [%] | 50 | 90/70 | B4C / Ni respectively |
Max FEL Power [W] | 200 | ||
Experimental Spot Size Range
|
1-10 1-10 |
<1-10 <1-10 |
Finite bendable KB mirrors for both SXU and HXU beams |
Beam Position Stability [% of FWHM] |
<10 | Required for overlap of SXU and HXU beams |
Advisory Panel
- Uwe Bergmann - SLAC
- Adrian Mancuso - European XFEL
- Claudio Masciovecchio - Elettra
- Chris Milne - PSI
- Robert Duarte - LBL
- Garth Williams - BNL
- Janos Hajdu - Uppsala Universitet
- David Reis - SLAC
- Ian Robinson - UCL
NEH 1.2 Links
TXI Instrument Team
Andy Aquila
Scientist
(650) 926-2682
aquila@slac.stanford.edu
Serge Guillet
Engineer
(650) 926-4771
sguillet@slac.stanford.edu