| Paper | Title | Page |
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| WG1000 | ERL2011 Summaries of Working Group 1 | 10 |
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Slides WG1000 [0.035 MB] | |
WG1007 |
Status of 500-kV DC Gun at JAEA | |
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| We have developed a 500-kV DC gun at JAEA. It is difficult to apply DC high voltage on a ceramic insulator with a stem electrode because of field emission from the electrode. By employing a segmented insulator with rings which guard the ceramics from the field emission, we succeeded in applying 500-kV on the ceramics for eight hours without any discharge in Dec. 2009. This high voltage testing was performed with a simple configuration without NEG pumps and electrodes. In Jul. 2009, we reached 380kV with electrodes in place before we suffered field emission problem from the cathode electrode. Then we generated beam at 300kV in Nov. 2010. After beam generation we have continued high voltage testing with electrodes in place. In Jul. 2011, we reached 510kV, before suffering another field emission problem from cathode electrodes. The problem may be attributed to small dust inside our gun chamber. We are trying to reach 550kV by solving the small dust problem. Our current status of development will be presented in the workshop. | ||
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Slides WG1007 [6.486 MB] | |