TXI, the NEH 1.2 instrument, will be configured to operate on both the soft X-ray undulator (SXU) and the hard X-ray undulator (HXU) sources with the following configuration requirements:

• Fixed X-ray beam trajectories

• Ability to focus the two sources simultaneously into a single micron diameter interaction point where the experimental endstation will be positioned.

• Ability to efficiently change experimental endstations.

X-ray Requirements

• Focusing: KB mirrors with 2 stripes (Nickel and Boron Carbide)

  • 1.5 μm in vertical
  • 0.8 μm in horizontal
  • KB's can be removed for unfocused operation or Zone plate operation

• Photon Energy Range:

  • Soft X-ray Undulator Branch Line

    • 250 eV to 5 keV
    • Harmonic Rejection between 1.4 and 5 keV

  • Hard X-ray Branch Line

    • 1 keV to 7 keV
    • Harmonic Rejection between 2.2 and 7 keV

• Allows both copper and superconducting accelerator operations

• Allows simultaneous undulator operations for X-ray pump and X-ray probe operations

• Beamline transmission 60 to 90% depending on operation mode

• Repetition rate: up to 929 kHz (including 120 Hz Cu operations)