MCP - Based Detectors, Calibration, Acceptance Tests, and First Photon Radiation Measurements

Abstract

: Detectors based on micro channel plates (MCP) are used to detect the radiation of free electron lasers. Three MCP detectors were developed by JINR for the European XFEL (SASE1, SASE2, and SASE3 beamlines). These detectors were designed to operate in a wide dynamic range from the level of spontaneous emission to the SASE (Self-Amplified Spontaneous Emission) saturation level (between a few nJ and up to 25 mJ), and in a wide wavelength range from 0.05 nm to 0.4 nm for SASE1 and SASE2, and from 0.4 nm to 4.43 nm for SASE3. The photon pulse energies are measured by an MCP with an anode and with a photodiode. The photon beam image is observed by an MCP imager with a phosphor screen anode.