Journal of The Vacuum Society of Japan 

About: Journal of The Vacuum Society of Japan is an academic journal. The journal publishes majorly in the area(s): Thin film & Sputtering. It has an ISSN identifier of 1882-2398. It is also open access. Over the lifetime, 1090 publications have been published receiving 1437 citations.

Present Status of a New Vacuum Ultraviolet and Soft X-Ray Undulator Beamline BL-13A for the Study of Organic Thin Films Adsorbed on Surfaces

Abstract: The present status of a new vacuum ultraviolet/soft X-ray (VUV/SX) beamline (BL-13A) used for the study of organic thin films adsorbed on surfaces is described. The base pressure of BL-13A is maintained below 1×10−8 Pa in order to prevent contamination of the optics by residual gases. The measured performance is as follows: photon-energy region, 30-1,200 eV; photon flux, 109-1011 photons s−1; photon-energy resolution (E/ΔE), 10,000 at a photon energy of 401 eV; spot size (horizontal\ imes;vertical) at the second focus, ≈630×120 μm; photon-energy drift, ≤±0.02 eV at a photon energy of 244.39 eV; reduction of photon flux in the C K-edge region, ∼50%.

Size Matters : The Vacuum System of the KATRIN Neutrino Experiment

Abstract: The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to measure the electron neutrino mass with an unprecedented sensitivity of 0.2 eV/c2, using β-electrons from tritium decay. Super-conducting magnets will guide the electrons through a vacuum beam-line from the gaseous tritium source through a differential pumping section to a high resolution spectrometer, where the kinetic energy will be measured. This paper will give an overview of the complex vacuum system of the KATRIN experiment and presents first results of the vacuum performance of the spectrometer. Background considerations require a vacuum of 10-11 mbar or better in the large spectrometer vessel (1240 m3). A combination of NEG pumps and cascaded turbo-molecular pumps will provide the necessary pumping speed. First measurements of outgassing rates after baking the stainless steel vessel (316LN) at 350°C are reported here.