6 research outputs found
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Toward the development of a soft x-ray reflection imaging microscope in the Schwarzschild configuration using a soft x-ray laser at 18. 2 nm
We present the recent results obtained from a soft X-ray reflection imaging microscope in the Schwarzschild configuration. The microscope demonstrated a spatial resolution of 0.7 {mu}m with a magnification of 16 at 18.2 nm. The soft X-ray laser at 18.2 nm was used as an X-ray source. Mo/Si multilayers were coated on the Schwarzschild optics and the normal incidence reflectivity at 18.2 nm per surface was measured to be {approximately} 20 %. 18 refs., 6 figs
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Soft x-ray laser microscopy
Microscopes based on soft X-ray lasers possess unique advantages in bridging the gap between high resolution electron microscopy of dehydrated, stained cells and light microscopy at comparatively low resolution of unaltered live cells. The high brightness and short pulse duration of soft X-ray lasers make them ideal for flash imaging of live specimens. The Princeton soft X-ray laser is based on a magnetically confined laser produced carbon plasma. Radiation cooling after the laser pulse produces rapid recombination which produces a population inversion and high gain. A full account is given in a companion paper in this volume. The important characteristics of the laser beam produced by this device are 1 to 3 mJ of 18.2 nm radiation in a 10 to 30 nsec pulse with a divergence of 5 mrad. The 18.2 nm wavelength, while outside the water window, does provide a factor of 3 difference in absorption coefficients between oxygen and carbon
Cometary Matter Analyser (COMA/CRAF) Schlussbericht
This prospect was part of an international program under which the chemical composition of cometary dust particles was to be measured 'in situ' during a rendezvous and flyby mission of a Mariner Mark II space probe and a comet (depending on the time of launch). Two necessary tasks, preliminary hardware development and interface definition, have been completed within the projects submitted for approval. As a result a model close to the flight configuration has been created, which was to be made available to the flight hardware contractor and his purposes. The Comet Redezvous and Asteroid Flyby (CRAF) mission was abondoned after joint resolution adopted by NASA and the Federal Ministry for Research and Technology in 1992. Since an instrument like CoMa is an important contribution both to future cometary redezvous missions, such as ROSETTA, as well as for accompanying laboratory activities, this project was terminated in a 'qualified conclusion'. In the process, components suitable for the laboratory developed from the preliminary units were produced and put into operation. (orig./HM)Das Vorhaben war Teil eines internationalen Programms, bei dem die chemische Zusammensetzung kometarer Staubteilchen waehrend eines Mitfluges einer Raumsonde vom Typ Mariner Mark II mit einem Kometen (abhaengig vom Startzeitpunkt) 'in situ' gemessen werden sollte. Diese beiden notwendigen Aufgaben, Vorentwicklung der Hardware und Interfacedefinition sind innerhalb des beantragten Vorhabens erledigt worden. Als Ergebnis ist ein der Flugkonfiguration nahes Modell entstanden, das dem Auftragnehmer fuer die Flug-Hardware fuer seine Zwecke zur Verfuegung gestellt werden sollte. Die Mission CRAF ist im Januar 1992 von NASA und BMFT nach einem gemeinsamen Beschluss aufgegeben worden. Da ein Geraet wie CoMA sowohl fuer zukuenftige Kometen-Rendezvous-Missionen wie ROSETTA, wie auch fuer begleitende Laboraktivitaeten ein wichtiger Beitrag ist, wurde noch ein 'qualifizierter Abschluss' der Arbeiten durchgefuehrt. Dabei wurden dem aus den vorentwickelten Einheiten labortaugliche Komponenten hergestellt und in Betrieb genommen. (orig./HM)Available from TIB Hannover: F94B0615 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman
Prinicpal investigator instrument proposal. Type 1 procedure Commentary Matter Analyser. Pt. 2
Available from TIB Hannover: F94B0543 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman