TXI (Tender X-ray Instrument)

There are three primary goals for the TXI instrument: 

1. A beamline designed to incorporate X-ray Pump and X-ray Probe techniques especially in the emerging field of nonlinear X-ray science. 
2. 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. 
3. 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. See Intro to TXI video.

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.  

Advisory Panel