CXI Schematic

CXI beam directions

CXI Beamline Sections

Acronym

Full Name

Devices

Purpose

XRT:DIA

DIAgnostics stand in the X-ray Tunnel

  • Pulse Picker

  • Attenuators (10 filters)

  • X-ray Focusing Lenses

  • Rapidly shutter the X-ray beam

  • Control the incident beam intensity

  • Pre-focus the X-ray beam or produce a ~10 micron focus at CXI

DG1

DiaGnostics stand 1

  • Reference Laser

  • Slits 1

  • Profile-Intensity Monitor

  • Differential Pump

  • Produce a visible reference line for alignment

  • Slit the beam down and reduce unwanted halo, Define the beam entering the KB mirrors

  • Measure the incidnet beam profile entering the CXI hutch

  • Separate the vacuum of the KB mirrors from the upstream beamline

KB1

1 micron KB mirrors

  • Slits 2

  • 1 micron KB mirrors

  • Slits 3

  • Slit the beam down and clean the beam before entering the KB mirrors

  • Focus the X-ray beam to a ~1 micron spot

  • Slit the beam down and clean the beam entering the KB01 mirrors or the beam exiting the KB1 mirrors

KB01 or KB2

0.1 micron KB mirrors

  • 100 nm KB mirrors

  • Focus the X-ray beam to a ~100 nm spot

SC01 or SC2

0.1 micron Sample Chamber

  • 100 nm interaction region

  • Location of the ~100 nm focus

DSA

Detector Stage (A location)

  • Full size CSPAD

  • X-ray Focusing Lenses

  • Attenuator or beam stop

  • Forward scattering measurements with the nanofocus chamber

  • Refocusing or collimating the 100 nm focus for reuse downstream

  • Attenuate the beam passing through the CSPAD hole or block it entirely

DG2

DiaGnostics stand 2

  • CSPAD 140K or X-ray Focusing Lenses

  • Slits 4

  • Intensity-Position Monitor

  • Profile-Intensity Monitor

  • Differential Pump

  • Measure the low angle forward scattering from the 100 interaction region

OR

  • Change the divergence of the 1 micron KB beam and control the spot size in SC1

  • Slit the beam down after the refociusing lenses or clean the beam before after the 1 micron KB mirrors

  • Non-destructive relative measurement of the pulse intensity

  • Measure the beam profile on the way to the 1 micron focus, after the 100 nm focus or after the refocusing lenses

  • Isolate the 1 micron sample chamber environment from the upstream part of the beamline

DSB

Detector Stage (B location)

  • Full size CSPAD

OR

  • Time Tool

  • Pulse Selector

  • Attenuators (6 filters)

  • Slits 5

  • Differential Pump

  • Back scattering measurements with the 1 micron focus

OR

  • Cross-correlate the arrival time of the X-rays and pump lasers

  • Rapidly shutter the X-ray beam or control the repetition rate for SC1

  • Control the incident beam intensity

  • Slit the beam down after the refocusing lenses or clean the beam before after the 1 micron KB mirrors

  • Isolate the 1 micron sample chamber environment from the upstream part of the beamline

SC1

1 micro Sample Chamber

  • 1 micron interaction region

  • Location of the ~1 micron focus and of the refocused 100 nm beam

DSC

Detector Stage (C location)

  • Full size CSPAD (Front detector for SC1)

  • Attenuator or beam stop

Coming Soon

  • Pulse Selector for refocused 1 micron beam

  • X-ray focusing lenses for refocusing or collimating the 1 micron focus

  • Forward scattering measurements with the micron focus chamber (High angle detector)

  • Attenuate the beam passing through the CSPAD hole or block it entirely

Coming Soon

  • Rapidly shutter the X-ray beam or control the repetition rate for SSC

  • Refocusing or collimating the 1 micron focus for reuse downstream

SSC or SC3

Serial Sample Chamber

  • Interaction for refocused 1 micron beam

  • Location of the refocused 1 micron beam

DSD

Detector Stage (D location)

  • Full size CSPAD (Back detector for SC1)

OR

  • Full size CSPAD (Detector for SSC)

  • Attenuator or beam stop

  • Forward scattering measurements with the micron focus chamber (Low angle detector)

OR

  • Forward scattering measurements with the refocused beam in SSC

  • Attenuate the beam passing through the CSPAD hole or block it entirely

DG3

DiaGnostics stand 3

  • Single Shot Spectrometer

  • Measure the single shot X-ray spectrum

DG4

DiaGnostics stand 4

  • Intensity-Position Monitor

  • Profile-Intensity Monitor

  • Non-destructive relative measurement of the pulse intensity

  • Measure the beam profile at the end of the CXI hutch, after all focusing optics and all interactions with samples or diagnostics