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Mase K.,High Energy Accelerator Research Organization | Kikuchi T.,High Energy Accelerator Research Organization | Tanaka H.,High Energy Accelerator Research Organization | Toyoshima A.,High Energy Accelerator Research Organization | Watanabe F.,Vaclab Inc.
Journal of the Vacuum Society of Japan | Year: 2010

One-body type water- and air-cooling fixed masks made of forged 0.2% beryllium copper alloy have been developed, and successfully applied for the front end of a new undulator beamline, BL-13A, at the Photon Factory in Tsukuba, Japan. Advantages of the masks are a simple structure, no welding, low cost, high duration, and an extremely low out-gassing rate. Forged 0.2% beryllium copper alloy is demonstrated to be a valuable material for synchrotron radiation instruments. Source


Watanabe F.,Vaclab Inc.
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films | Year: 2010

A commercially viable, extremely high vacuum hot-cathode ionization gauge that can measure pressures as low as 5.4× 10-12 Pa, by reducing the limits imposed by soft x rays, electron-stimulated desorption (ESD), and outgassing, is reported. The gauge construction includes a cylindrical grid, which is closed at both ends; ions are drawn from the grid through a long, axial slit made in the cylindrical surface. Thus, the ion beam that emerges forms a "belt." This beltlike ion beam is guided on a curved path by a cylindrical sector deflector and terminates on a plate collector arranged after a beam trajectory rotation of 230°. These elements are embedded in a solid cylinder of 0.2% BeCu alloy, which has a low emissivity (radiation factor) and high thermal conductivity. As a result, the effects of heat radiation and outgassing (caused by the hot-cathode filament) and soft x-ray photoemission (the grid is the soft x-ray source) are reduced in the deflector/collector region. This electrode arrangement can also greatly decrease the flux of soft x rays and ESD in the direction of the belt ion beam because it sets to 90° the angle between the extracted gas-phase ion beam and the maximum flux of soft x rays and ESD. In addition, it achieves an extremely low-pressure measurement limit by minimizing loss in the ion transport, and because the collector is well hidden, being located after the large deflection of the ion beam. © 2010 American Vacuum Society. Source


Tanaka H.,High Energy Accelerator Research Organization | Kikuchi T.,High Energy Accelerator Research Organization | Toyoshima A.,High Energy Accelerator Research Organization | Nagatani Y.,High Energy Accelerator Research Organization | And 4 more authors.
Journal of the Vacuum Society of Japan | Year: 2011

New water-cooled movable masks made of forged 0.2% beryllium copper alloy have been developed and applied to the front end of the BL-13A undulator beamline at the Photon Factory in Tsukuba, Japan. The masks have a simple structure, are low in cost, and have an extremely low outgassing rate. '. Source


Kikuchi T.,High Energy Accelerator Research Organization | Mase K.,High Energy Accelerator Research Organization | Watanabe F.,Vaclab Inc.
Journal of the Vacuum Society of Japan | Year: 2012

Several types of simple non-evaporable getter (NEG) assemblies have been constructed using a commercial St 707 strip or a St 172 module. Each assembly is mounted on a conflat flange with an outer diameter of 203, 70, or 34 mm (CF203, CF70, and CF34, respectively) and can be activated by direct current heating. The pumping speeds of the three NEG assemblies (the CF70-mount type using a St 707 strip, the CF70-mount type using a St 172 module, and the CF152-mount type using a St 707 strip) have been measured for N2 and H2 gasses at 20°C. The maximum pumping speeds for the three types of NEG assemblies were 4.8, 1.2, and 25 L s ?1 (8.0, 3.6, and 82 L s ?1) for N 2 (H 2), respectively. These NEG assemblies are useful for laboratory ultrahigh vacuum systems as well as vacuum ultraviolet/soft-X-ray beamlines in synchrotron radiation facilities. Source


Patent
Vaclab Inc. | Date: 2015-08-05

A non-evaporable getter

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