SNS LEBT Chopper improvements
- Resource Type
- Conference
- Authors
- Saethre, Robert; Peplov, Vladimir
- Source
- 2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Power Modulator and High Voltage Conference (IPMHVC), 2012 IEEE International. :704-707 Jun, 2012
- Subject
- Power, Energy and Industry Applications
Components, Circuits, Devices and Systems
pulsed power
LEBT
Power MOSFET
gate drive
- Language
The Low Energy Beam Transport (LEBT) Chopper for the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory has experienced failures of the power semiconductors within the tri-state pulsed power supplies. These power supplies deliver a +/− 3 kV pulse or ground potential to an electrostatic einzel lens split into four quadrants to deflect the beam for 200 ns to 1 us. The four power supplies are ac coupled to a −50 kV dc supply for steering offset of the lens. This paper discusses the failure modes and improvements to mitigate future failures.