Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (01): 10202-010202.

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS •

### Method of triggering the vacuum arc ion source with a resistor

ZHENG Le LAN Zhaohui LONG Jidong PENG Yufei LI Jie YANG Zhen DONG Pan SHI Jinshui

1. (Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China)
• Received:2013-11-14 Revised:2013-12-20 Online:2014-01-10 Published:2014-01-20

Abstract:

Background: The metal vapor vacuum arc (MEVVA) ion source is a common source which provides strong metal ion flow. To trigger this ion source, a high-voltage trigger pulse generator and a high-voltage isolation pulse transformer are needed, which makes the power supply system complex. Purpose: To simplify the power supply system, a trigger method with a resistor was introduced, and some characteristics of this method were studied. Methods: The ion flow provided by different main arc current was measured, as well as the trigger current. The main arc current and the ion current were recorded with different trigger resistances. Results: Experimental results showed that, within a certain range of resistances, the larger the resistance value, the more difficult it was to success fully trigger the source. Meanwhile, the main arc rising edge became slower on the increasing in the trigger time. However, the resistance value increment had hardly impact on the intensity of ion flow extracted in the end. The ion flow became stronger with the increasing main arc current. Conclusion: The power supply system of ion source is simplified by using the trigger method with a resistor. Only a suitable resistor was needed to complete the conversion process from trigger to arc initiating.