Beam dynamics in a long-pulse linear induction accelerator
The second axis of the Dual Axis Radiography of Hydrodynamic Testing (DARHT) facility produces up to four radiographs within an interval of 1.6 microseconds. It accomplishes this by slicing four micro-pulses out of a long 1.8-kA, 16.5-MeV electron beam pulse and focusing them onto a bremsstrahlung converter target. The long beam pulse is created by a dispenser cathode diode and accelerated by the unique DARHT Axis-II linear induction accelerator (LIA). Beam motion in the accelerator would be a problem for radiography. High frequency motion, such as from beam breakup instability, would blur the individual spots. Low frequency motion, such as produced by pulsed power variation, would produce spot to spot differences. In this article, we describe these sources of beam motion, and the measures we have taken to minimize it.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1029924
- Report Number(s):
- LA-UR-10-05703; LA-UR-10-5703; TRN: US1105871
- Resource Relation:
- Journal Volume: 59; Journal Issue: 6(1); Conference: BEAMS2010 ; October 10, 2010 ; Jeju, Korea
- Country of Publication:
- United States
- Language:
- English
Similar Records
Diode magnetic-field influence on radiographic spot size
Retuning the DARHT Axis-II Linear Induction Accelerator