PAC09 - List of Authors (Ilg, T.)

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Ilg, T.

Paper	Title	Page
MO6RFP078	Upgrades to the Injector Cathode and Supporting Structure of the DARHT Second Axis Accelerator	554
	R.R. Mitchell, B.A. Gardner, T. Ilg LANL, Los Alamos, New Mexico M. Leitner LBNL, Berkeley, California B.A. Prichard SAIC, Los Alamos, New Mexico
	Funding: National Nuclear Security Administration of the US Department of Energy The Dual-Axis Radiographic Hydrodynamic Test Facility (DARHT) at Los Alamos National Laboratory (LANL) consists of two linear induction accelerators oriented at right angles to each other. The DARHT First Axis has been successfully operated since 1999 and produces a 60 ns pulse with beam energy of 20 MeV and beam current of 1.9 kA. The DARHT Second Axis was successfully commissioned in May 2008 and produces a 1600 ns pulse with beam energy of 17.5 MeV and beam current of 2.1 kA. The Second Axis Injector uses a 16.5 cm diameter thermionic cathode with a 10 A/cm² required current density to emit electrons into the accelerator. During the early Second Axis commissioning activities in 2006, deficiencies in the DARHT Second Axis Injector were found that prevented the injector cathode from meeting the required 10 A/cm² current density. A comprehensive campaign was initiated to solve the injector cathode performance issues. This paper describes the deficiencies found and the solutions used to enable the DARHT Second Axis Injector to meet its requirements.

Paper

Title

Page

MO6RFP078

Upgrades to the Injector Cathode and Supporting Structure of the DARHT Second Axis Accelerator

554

R.R. Mitchell, B.A. Gardner, T. Ilg
LANL, Los Alamos, New Mexico
M. Leitner
LBNL, Berkeley, California
B.A. Prichard
SAIC, Los Alamos, New Mexico

Funding: National Nuclear Security Administration of the US Department of Energy

The Dual-Axis Radiographic Hydrodynamic Test Facility (DARHT) at Los Alamos National Laboratory (LANL) consists of two linear induction accelerators oriented at right angles to each other. The DARHT First Axis has been successfully operated since 1999 and produces a 60 ns pulse with beam energy of 20 MeV and beam current of 1.9 kA. The DARHT Second Axis was successfully commissioned in May 2008 and produces a 1600 ns pulse with beam energy of 17.5 MeV and beam current of 2.1 kA. The Second Axis Injector uses a 16.5 cm diameter thermionic cathode with a 10 A/cm² required current density to emit electrons into the accelerator. During the early Second Axis commissioning activities in 2006, deficiencies in the DARHT Second Axis Injector were found that prevented the injector cathode from meeting the required 10 A/cm² current density. A comprehensive campaign was initiated to solve the injector cathode performance issues. This paper describes the deficiencies found and the solutions used to enable the DARHT Second Axis Injector to meet its requirements.