622 New patents frequency. The electromagnetic wave produced by the loop 5 is progressive, which, by the Dop- pler effect, increases the width of the absorption line of the cell. This increase makes it possible to reduce the control time constant and con- sequently makes it possible to have a compact frequency standard, with a rapid control action, which can operate in an unfavorable environ- ment. 4405861 SECONDARY-ELECTRON DETECTOR FOR ANALYZING IRRADIATED SAMPLES FOR SCANNING ELECTRON MICROSCOPES AND MICROPROBES Giancarlo Giacchetti, Jurgen Ransch, Clive T Walker, Karlsruhe, Federal Republic Of Ger- many assigned to European Atomic Energy Community (Euratom) A secondary-electron detector for the analysis of irradiated samples in scanning electron microscopes and microprobes, including an electron collector 12 arranged along a curved or angular path, an electron accelerator 13, a scintillator 24, a light guide 27 and a photomultiplier 28. To enable more effective investigation of irradiated nuclear fuels and to improve the magnification power, a spectrometer 20 and a Wehnelt cylinder 25 are provided between the accelerator and the scintillator. 4405860 AUTOMATICALLY CONTROLLABLE LOADING APPARATUS FOR MASS SPECTROMETERS OR THE LIKE Curt Brunnee, Lothar Delgmann, Gunte Mar- ten, Bremen, Federal Republic Of Germany assigned to Finnigan Mat GmbH Automatically controllable loading apparatus for a mass spectrometer or like equipment com- prises a rotatable disc for holding a plurality of sample carriers for successive movement into a transfer position. A push rod transfers successive sample carriers from the transfer position to a loading position. Guide means guide the push rod during its transfer movement. The guide means include a shut-off valve adjacent the loading position. Sealing means define in a fixed position between the valve and the transfer position at least one vacuum chamber adapted to be exhausted for the purpose of equalizing the pres- sure at opposite sides of said valve. 4405203 ATMOSPHERIC DISPERSION CORRECTOR Edward Wallner, William B Wetherell assigned to The United States of America as represented by the Secretary of the Air Force

Secondary-Electron Detector for Analyzing Irradiated Samples for Scanning Electron Microscopes and Microprobes

Download PDF Report

Upload
lydat
View
212
Download
0

Embed Size (px)

Citation preview

Page 1: Secondary-Electron Detector for Analyzing Irradiated Samples for Scanning Electron Microscopes and Microprobes

622 New patents

frequency. The electromagnetic wave produced by the loop 5 is progressive, which, by the Dop- pler effect, increases the width of the absorption line of the cell. This increase makes it possible to reduce the control time constant and con- sequently makes it possible to have a compact frequency standard, with a rapid control action, which can operate in an unfavorable environ- ment.

4405861

SECONDARY-ELECTRON DETECTOR FOR ANALYZING IRRADIATED SAMPLES FOR

SCANNING ELECTRON MICROSCOPES AND

MICROPROBES

Giancarlo Giacchetti, Jurgen Ransch, Clive T Walker, Karlsruhe, Federal Republic Of Ger- many assigned to European Atomic Energy Community (Euratom)

A secondary-electron detector for the analysis of irradiated samples in scanning electron microscopes and microprobes, including an electron collector 12 arranged along a curved or angular path, an electron accelerator 13, a scintillator 24, a light guide 27 and a photomultiplier 28. To enable more effective investigation of irradiated nuclear fuels and to improve the magnification power, a spectrometer 20 and a Wehnelt cylinder 25 are provided between the accelerator and the scintillator.

4405860

AUTOMATICALLY CONTROLLABLE LOADING

APPARATUS FOR MASS SPECTROMETERS OR THE LIKE

Curt Brunnee, Lothar Delgmann, Gunte Mar- ten, Bremen, Federal Republic Of Germany assigned to Finnigan Mat GmbH

Automatically controllable loading apparatus for a mass spectrometer or like equipment com- prises a rotatable disc for holding a plurality of sample carriers for successive movement into a transfer position. A push rod transfers successive sample carriers from the transfer position to a loading position. Guide means guide the push rod during its transfer movement. The guide means include a shut-off valve adjacent the loading position. Sealing means define in a fixed position between the valve and the transfer position at least one vacuum chamber adapted to be exhausted for the purpose of equalizing the pres- sure at opposite sides of said valve.

4405203

ATMOSPHERIC DISPERSION CORRECTOR

Edward Wallner, William B Wetherell assigned to The United States of America as represented by the Secretary of the Air Force