NASA Technical Reports Server (NTRS) : Means pdf

NASA Technical Reports Server (NTRS) : Means

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An arrangement for calibrating a photon detector particularly applicable for the ultraviolet and vacuum ultraviolet regions is based on electron photon coincidence utilizing crossed electron beam atom beam collisions. Atoms are excited by electrons which lose a known amount of energy and scatter with a known remaining energy, while the excited atoms emit photons of known radiation. Electrons of the known remaining energy are separated from other electrons and are counted. Photons emitted in a direction related to the particular direction of scattered electrons are detected to serve as a standard. Each of the electrons is used to initiate the measurements of a time interval which terminates with the arrival of a photon exciting the photon detector. Only the number of time intervals related to the coincidence correlation and of electrons scattered in the particular direction with the known remaining energy and photons of a particular radiation level emitted due to the collisions of such scattered electrons are counted.

The detector calibration is related to the number of counted electrons and photons

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 9/4/1984
• Year: 1984
• Book Topics/Themes: NASA Technical Reports Server (NTRS), CALIBRATING, DETECTORS, ELECTRONS, PHOTON-ELECTRON INTERACTION, PHOTONS, ATOMIC BEAMS, ELECTRON BEAMS, ELECTRON SCATTERING, TIME MEASUREMENT, ULTRAVIOLET RADIATION, Srivastava, S. K. [Inventor

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