Capabilities & Parameters
Scientific Capabilities
| Scientific Application |
Time-resolved spectroscopy and scattering with ultrafast and ultraintense soft X-rays at the LCLS |
| Techniques |
X-ray Emission Spectroscopy (XES) |
| X-ray Photoelectron Spectroscopy (XPS) |
| X-ray Absorption Spectroscopy (XAS) |
| Coherent Imaging |
| Fourier Transform Holography |
| Sample Environment |
A wide range of experimental setups in UHV and UV conditions |
Source Parameters
| Linac Energy |
4.3 GeV for 800 eV 1st harmonic |
| Undulator |
33 Planar hybrid undulator 30 mm gap |
| Source Size |
230 x 230 µm2 FWHM @ 800 eV |
| Source Divergence |
5.7 x 5.7 µrad2 FWHM @ 800 eV |
| Repetition Rate |
120 Hz |
| Pulse Duration |
137 fs |
| Photons per Pulse |
≤1 x 1013 |
Photon Beam Properties
| Sample Configurations |
Pre-Mono Transmission Sample Chamber, white beam |
Endstation, white beam |
Endstation, mono |
| Focusing Capability (Kirkpatrick-Baez) |
1x1 mm (unfocused at sample) |
< 10x10 um |
< 10x10 um |
| Energy Range |
500-2000 eV
(initial operations from 825-2000 eV)
|
grat 1: 500-1500 eV |
| grat 2: 800-2000 eV |
| Energy Resolution |
~0.1 eV (500 eV) |
~0.5 eV (500 eV) |
~0.1 eV (500 eV) |
| ~0.2 eV (1000 eV) |
~1.0 eV (1000 eV) |
~0.2 eV (1000 eV) |
| ~0.6 eV (2000 eV) |
~2.0 eV (2000 eV) |
~0.6 eV (2000 eV) |
| Flux (ph/pulse) @ resolution limit |
1 x 1013 (500 eV) |
1 x 1013 (500 eV) |
1.5 x 1011 (500 eV) |
| 8 x 1012 (1000 eV) |
8 x 1012 (1000 eV) |
2 x 1011 (1000 eV) |
| 4 x 1012 (2000 eV) |
4 x 1012 (2000 eV) |
4 x 1010 (2000 eV) |
Optical Laser Properties
| Sample Configurations |
Pre-Mono Transmission Sample Chamber |
Endstation |
| Laser Power |
800nm: 7 x 1012 W/cm2 |
800nm: 2.5 x 1015 W/cm2 |
| 400nm: 3 x 1012 W/cm2 |
400nm: 1 x 1015 W/cm2 |
| Laser Pulse Width |
800nm: 35-100 fs |
800nm: 35-100 fs |
| 400nm: 50-100 fs |
400nm: 50-100 fs |
| Focusing Capability |
1mm (1/e2) |
50µm (1/e2) |
Diagnostics
| Intensity monitor |
A pulse by pulse intensity monitor after the exit slit
for normalizing detector signals. The intensity measurement
is relative with a noise level <0.1% |
| Fast Shutter |
A fast shutter to quickly turn on or off the beam or to select
individual LCLS x-ray pulses. Closes or open in <8 ms. The fast
shutter is up stream of the first experimental position.
|
| Alignment Laser |
A HeNe alignment laser beam coaxial with the FEL beam
at the Endstation Position, to facilitate the positioning of samples
in the FEL beam. This laser is class IIIa rating or less. |
