PHOTON SCIENCE

The CAMP@FLASH instrument [1] is a permanent end-station installed at beamline BL1 in the FLASH1 hall, that is available to FLASH users through regular proposals.
A pair of nickel-coated KB mirrors allows focusing the FEL radiation over the entire wavelength range available at FLASH1 to a spot size of 7µm x 8µm (hor/ver, measured at 13.5nm).
The instruments modular and flexible layout allows using detection schemes employing large-area, single-photon counting pnCCD photon-detectors [2] with VMI- and COLTRIMS-type electron and ion spectrometers. In addition, user provided instrumentation and target delivery systems can be mounted to the instrument via large CF250 ports perpendicular to the FEL-beam axis.
After the shutdown in 2024-2025, BL1 will initially not be operable with an optical pump-probe laser. A high-power optical pump-probe laser for FLASH1 beamlines will be built after accomplishing the seeded FEL and its delivery.
BL1 offers a multilayer based split-and-delay unit (SDU) for XUV pump -XUV probe experiments ( delay range -30ps to +650ps) which is at the moment limited to 13.57nm wavelength [3].

Attention!

If you plan to submit a proposal, please contact the CAMP team prior to submission of your proposal to discuss all available options for your envisioned experiment and its technical feasibility.
Experiments at FLASH have to be conducted at UHV vacuum conditions. Please be aware of the vacuum guidelines for FLASH experiments.

Additional Information on available equipment:

pnCCD detectors: CAMP is equipped with two large-area (78 x 74 mm²), single-photon counting 1 Megapixel pnCCD detectors (75 x 75 µm² pixel size), which collect scattered and fluorescent photons with high quantum efficiency and an energy resolution of 40 to 200 eV between <100 eV and 25 keV at a frame read-out rate up to 200 Hz. A variable-sized gap/hole in the center of the first CCD allows the direct FEL beam (and a high-power pump-probe laser, if applicable) to pass through the detector, while the small-angle scattering signal within the area of the hole can be detected on the second CCD, which has a fixed-diameter hole for the direct FEL beam. Both pnCCD detectors can be removed individually if they are not needed in order to provide more flexibility inside the chamber as well as better vacuum.

Electron and ion spectrometers: A suite of double-sided electron and ion imaging spectrometers (time-of-flight, velocity map imaging (VMI), and COLTRIMS/‘reaction microscope’ spectrometers) are available to detect ions and/or electrons of up to a few hundred eV kinetic energy within the full 4pi solid angle, while its conical electrodes provide an unrestricted line-of-sight from the interaction region to the pnCCD detectors. The spectrometers use 80mm MCP detectors that can be operated with delay-line anodes for coincident, momentum-resolved single particle detection or with MCP/phosphor screen detectors that are read-out at 10 Hz by CCD cameras.

Sample environment: The instrument offers 4 large open ports (CF250) for user provided sample environments or additional instrumentation. This includes gas-phase atomic or molecular beams (cw and pulsed), solid sample holder, cluster sources (rare gases, metal clusters), nano-particle aerodynamic-lens injectors, and many others.

BL1/CAMP Team:

Benjamin Erk E-Mail: Benjamin Erk Phone: +49 (0)40 8998 6237 Location: 49 / 112 Contact for BL1 / CAMP

Atia Tul Noor E-Mail: Atia Tul Noor Phone: +49 (0)40 8998 2770 Location: 49 / 113

Christina Papadopoulou E-Mail: Christina Papadopoulou Phone: +49 (0)40 8998 6376 Location: 49 / 112

Jonathan Correa E-Mail: Jonathan Correa Phone: +49 (0)40 8998 6599 Location: 99 / O3.005 Contact for pnCCD detectors for CAMP

Daniel Ramm E-Mail: Daniel Ramm Phone: +49 (0)40 8998 3014 Location: 49 / 112

Reference:
[1] B. Erk et al. CAMP@FLASH: an end-station for imaging, electron- and ion-spectroscopy, and pump–probe experiments at the FLASH free-electron laser, J. Synchrotron Rad. 25 (2018). Article

[2] L. Strüder et al., Large-format, high-speed, x-ray pnCCDs combined with electron and ion imaging spectrometers in a multipurpose chamber for experiments at 4th generation light sources, Nucl. Instr. and Meth. in Phys. Res. A 614, 483 – 496 (2010). Article

[3] M. Sauppe et al., XUV double-pulses with femtosecond to 650 ps separation from a multilayer-mirror-based split-and-delay unit at FLASH, Journal of synchrotron radiation 25(5), 1517 - 1528 (2018) Article


See publications from BL1 (after 2015)