Energy recovery linac (ERL) based next generation light sources require high brightness electron gun. We have developed a 500-kV, 10-mA photocathode DC gun. A segmented ceramic insulator with guard rings is employed to improve robustness at high voltage operation by keeping field emission electrons away from the ceramic surface. We have recently succeeded in applying 500 kV on the ceramics for eight hours without any discharge. This high voltage testing was performed with a simple configuration without NEG pumps, cathode and anode electrodes to mainly study the field emission from a tube supporting the cathode electrode. The same high voltage testing with a full configuration necessary for beam generation was carried out up to 380 kV. Up-to-date status of our gun development will be presented in detail.
|出版ステータス||Published - 2011 12 1|
|イベント||25th International Linear Accelerator Conference, LINAC 2010 - Tsukuba, Ibaraki, Japan|
継続期間: 2010 9 12 → 2010 9 17
|Other||25th International Linear Accelerator Conference, LINAC 2010|
|Period||10/9/12 → 10/9/17|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics