High Current Linear Transformer Driver (LTD) Experiments

Effects of gaseous defects on glycerin-impregnated multi-layer film insulation under impulse of 160-nanosecond wave-front

“…The lowest breakdown field is 173 kV/mm for n=7 insulator with a covering factor of 90%. Figure 8 shows the average breakdown field with error bars for 50% (n=5, 7,8,9,10), 70% (n=3, 4,5,8), 80% (n=3 to 6) and 90% (n=5, 7,8) in comparison with those for 100% coverage and n=1, 2, 3, 4, 5, 7, 10.…”

“…Later in the 1990's and the first decade of this century, further creative developments, various research work and applications of the 0.1 to 1 s wave-front LTD have been accomplished by laboratories and institutes around the world [7][8][9][10][11][12][13]. In some LTD's, a long (5 m) bushing-like flexible insulator was employed for the secondary-turn conductor which sustained a s-time-scale impulse up to a field of above 1 MV/cm.…”

“…The average electric strength and 1-sigma error-bar for covering factor 50% (n=5,7,8,9,10), 70% (n=3,4,5,8), 80% (n=3 to 6) and 90% (n= 5,7,8) in comparison with those for 100% coverage and n=1,2,3,4,5,7,10.…”

Design of a 7-MV Linear Transformer Driver (LTD) for down-hole flash x-ray radiography.

“…The LTD architecture discussed in this report was developed at the Institute of High Current Electronics (HCEI) in Tomsk, Russia. Individual LTD cavities have been tested with 10 [7,8], 16 [9,10], 20 [11], and 40 [12,13] parallel bricks. Repetitive testing of a single, high current, 20-brick cavity has been performed at Sandia to investigate lifetime of the LTD components.…”

“…The LTD adder consists of seven series cavities containing 10 parallel bricks each [14,15,8]. A high current adder was recently tested at HCEI with five series cavities with 40 parallel bricks each [13]. This high current system is being upgraded to 10 series cavities and will be tested at Sandia beginning next year.…”