Microchannel plates for soft X-ray imaging [email protected]

Microchannel plates for soft X-ray imaging [email protected] VUV/Soft X-rays (25 to 400 Angstrom) sensitive MCP detectors - for time resolved spectroscopy. MCP-GPS 34/2 for multi time gating spectroscopy Featured research: Fast plasma discharge capillary design as a high power throughput soft x-ray emission source. We present the experimental details and results from a low energy but high repetition rate compact plasma capillary source for extreme ultraviolet and soft x-ray research and applications. Two lengths of capillary are mounted in two versions of a closely related design. The discharge operates in 1.6 and 3.2 mm inner diameter alumina capillaries of lengths 21 and 36 mm. The use of water both as dielectric and as coolant simplifies the compact low inductance design with nanosecond discharge periods. The stored electrical energy of the discharge is approximately 0.5 J and is provided by directly charging the capacitor plates from an inexpensive insulated-gate bipolar transistor in 1 µs or less. We present characteristic argon spectra from plasma between 30 and 300 A° as well as temporally resolved x-ray energy fluence in discrete bands on axis. The spectra also allow the level of ablated wall material to be gauged and associated with useful capillary lifetime according to the chosen configuration and energy storage. The connection between the electron beams associated with the transient hollow cathode mechanism, soft x-ray output, capillary geometry, and capillary lifetime is reported. The role of these e-beams and the plasma as measured on-axis is discussed. The relation of the electron temperature and the ionization stages observed is discussed in the context of some model results of ionization in a non-Maxwellian plasma. MCP-GPS detectors: http://www.dmphotonics.com/MCP_MCPImageIntensifiers/mcpgps25.htm How to choose MCP detector http://www.dmphotonics.com/MCP_Detector_Basics/how_to_choose_mcp_detector.htm X-rays: https://en.wikipedia.org/wiki/X-ray Featured course: Soft X-Rays and Extreme Ultraviolet Radiation (www.coe.berkeley.edu/AST/sxreuv) Class Overview Interaction physics Radiation by an Accelerated Charge; Scattering Wave Propagation and Refractive Index;Refraction and Reflection, Kramers-Kronig Relations Multilayer Interference Coatings Synchrotron Radiation Physics of Plasmas, Basic Parameters, Fluid and Kinetic Descriptions Line and Continuum Radiation Waves in a Plasma; Non-Linear Processes in Plasmas; Black-Body Radiation Laser-Produced and Discharge Plasmas; Compact Plasma Sources High Harmonic Generation, Basic Processes, Quasi-Phasematching Flash Animation of HHG EUV and Soft X-Ray Lasers Cross-Sections, Spectral Bandwidth, Gain, Wavelength Scaling Spatial and Temporal Coherence, Spatial and Spectral Filtering Coherent Undulator Radiation van Cittert-Zernike; Coherence Experiments Zone Plate Formulas Diffraction by Zone Plates and Pinholes, Resolution DOF, Zone Plates Diffraction, Coherence Issues Application of Zone Plate Microscopy EUV Lithography