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URSA Minor is a 21-cavity Linear Transformer Driver (LTD) that has been built to evaluate LTD technology as a driver for flash radiography diode research. The LTD has been assembled and tested with initial testing being conducted at ±75 kV charge. In this configuration the generator has produced 1.7 MV on a 30-ohm MITL when driving an electron beam diode. Diagnostics during initial testing include...
Summary form only given. The radiographic linear transformer driver (LTDR) was built as a 1-MV test stand to demonstrate component reliability and the ability to couple LTD cavities to a magnetically insulated transmission line (MITL) and a electron beam diode. The original system consists of seven series cavities and was designed to generate a 100-ns FWHM voltage pulse with peak voltage of 0.8-1...
The RITS accelerator was upgraded from three pulse forming lines (PFL) and inductive voltage adder (IVA) cells to six PFLs and IVA cells during 2005 with radiographic diode experiments beginning in 2006 [1], [2]. The original RITS-6 accelerator configuration is capable of operation at voltages greater than 10 MV with a 80-Ω magnetically-insulated transmission line (MITL). Low impedance diodes such...
Flash X-RAY radiography has undergone a transformation in recent years with the resurgence of interest in compact, high intensity pulsed-power-driven electron beam sources. The radiographic requirements determine the X-ray source requirements, which can be met by demonstrated Induction Voltage Adder (IVA) accelerators driving a variety of focused electron beam diode loads. Each diode option provides...
Traditionally, paraxial diodes for intense, high brightness, X-ray radiography have utilized a gas-filled cell for electron beam focusing. The spot size for beams produced from such diodes is limited by the decay of the plasma return current, which causes the minimum beam spot location to drift upstream from the converter. Recent simulations using the LSP code have suggested that this drift can be...
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