Spatial intensity distributions of vacuum ultraviolet photon beams measured by thermoluminescent image films

Abstract

NOBUYUKI KIKUKAWA and TSUTOMU MAKITA. Can. J. Chem. 66, 1857 (1988.The thermoluminescent phosphor, calcium sulfate activated by manganese, was found to be a suitable material for imaging films to record the spatial distributionsoand reflections of vacuum ultraviolet (vuv) photon beams used for high-resolution photoelectron spectrometers. He I 584 A photons radiated in a microwave discharge tube were collimated through capillary tubes, and the phosphor films were placed at the position of the photoionization chamber. When the irradiated phosphor films were heated up to 200°C in a darkroom, faint green glow images were observable on the phosphor films and these images were recorded by photographic films. When the films were placed 11 8 mm from the exit of the collimating capillary tube, the photon beam images were almost circular, about 4.5 mm in diameter. The photon distribution in the collimated beam was interpreted with the aid of computer simulation. The experimental results revealed that the reflections of vuv photons at planes of various kinds were almost specular if the surface was clean and smooth and the glancing angles were small. Nosu~uKr KIKUKAWA et TSUTOMU MAKITA. Can. J. Chem. 66, 1857Chem. 66, (1988.On a trouvk que le sulfate de calcium activk par le mangankse, un produit phosphorescent et thermoluminescent, est un produit utile pour faire des films desquels on peut tirer des images permettant d'enregistrer les distributions spatiales et les rkflexions des faisceaux de photons ultraviolet sous vide (uvv) qui sont utilisks dans les spectromktres photoklectroniques a haute rksolution.On a dirigk les photons du He I 584 A qui proviennent d'une radiation dans un tube a dtcharge a micro-ondes vers des tubes capillaires servant de collimateur et on a place les films phosphorescents ii la place de la chambre a photoionisation. Lorsque les films phosphorescents irradiks ont kt6 chauffks a 200°C, dans un chambre noire, on a pu observer de faibles lueurs d'images vertes que I'on a enregistrk images sur des films photographiques. Lorsqu'on place les films 5 118 mm de la sortie du tube capillaire agissant cornrne collimateur, les images du faisceau de photons sont pratiquement circulaires, avec un diamktre d'environ 4,5 mm. On a interpritk la distribution des photons dans le faisceau qui a pass6 au collimateur en faisant appel a une simulation par ordinateur. Les rksultats exptrimentaux suggkrent que les rkflexions des photons (uvv) sur divers types de plans sont pratiquement sptculaires si la surface est lisse et propre et que les angles de percement sont faibles.[Traduit par la revue]

Argon plasma jet continuum emission investigation by using different spectroscopic methods

“…Such a torch can be used for virtually any type of process-gas; oxidizing, reducing and inert. Kikukawa and Makita [3] were interested in surface intensity measurements by thermo-luminescent image films. They detected ultraviolet photon beams by this method and determined the surface intensity distribution.…”

Characterization of an argon plasma jet by the imagery method

“…Other authors, such as Kikukawa and Makita [8], measured the surface intensity by using thermoluminescent image films. They detected ultraviolet photon beams by this method and they determined the surface intensity distribution.…”