Abstract
The non-monochromatic beamline BL1 at the FLASH free-electron laser facility at DESY was upgraded with new transport and focusing optics, and a new permanent end-station, CAMP, was installed. This multi-purpose instrument is optimized for electron- and ion-spectroscopy, imaging and pump-probe experiments at free-electron lasers. It can be equipped with various electron- and ion-spectrometers, along with large-area single-photon-counting pnCCD X-ray detectors, thus enabling a wide range of experiments from atomic, molecular, and cluster physics to material and energy science, chemistry and biology. Here, an overview of the layout, the beam transport and focusing capabilities, and the experimental possibilities of this new end-station are presented, as well as results from its commissioning.
Highlights
Free-electron lasers (FELs) deliver coherent extreme ultraviolet (XUV) and X-ray pulses with unprecedentedly high intensities (> 1012 photons/pulse) and ultra-short pulse durations (3–300 fs) (McNeil & Thompson, 2010)
We present an overview of the layout and capabilities of the beamline including new Kirkpatrick–Baez (KB) focusing optics (Kirkpatrick & Baez, 1948) as well as the permanent end-station, Center for Free-Electron Laser Science (CFEL)-Advanced Study Group (ASG) Multi-Purpose instrument (CAMP)@Free-electron LASer in Hamburg (FLASH), by showing first results from its commissioning
A variable-sized gap between the upper and lower module of the segmented front pn-junction charge coupled device (pnCCD) detector plane allows the direct FEL beam to pass through the detector, while the small-angle scattering signal within the area of the gap can be detected on the second pnCCD, which has a fixed-diameter hole for the direct FEL beam to pass through and exit the CAMP end-station
Summary
Free-electron lasers (FELs) deliver coherent extreme ultraviolet (XUV) and X-ray pulses with unprecedentedly high intensities (> 1012 photons/pulse) and ultra-short pulse durations (3–300 fs) (McNeil & Thompson, 2010) This opens the door towards numerous applications in a wide range of fields from atomic, molecular and optical physics to material and energy science, chemistry and biology, allowing, for example, single-shot coherent diffractive imaging, femtosecond pump– probe and multi-photon ionization experiments in the XUV and X-ray domain. This enables a variety of novel imaging schemes to study ultra-fast processes with down to Angstrom spatial and femtosecond temporal resolution. We present an overview of the layout and capabilities of the beamline including new Kirkpatrick–Baez (KB) focusing optics (Kirkpatrick & Baez, 1948) as well as the permanent end-station, CAMP@FLASH, by showing first results from its commissioning
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