Square pulse LTD with 5^th harmonic bricks

Factors affecting the output pulse flatness of the linear transformer driver cavity systems with 5th harmonics

“…Also in [1] we noted that the diameter of the LTD cavity should be large enough to contain more than one brick generating the 5th harmonic. In this paper we assume that the total number of the bricks is s þ m þ f ¼ 20, then at f ¼ 2 or 3 only two configurations, 10S þ 7M þ 3F and 11S þ 7M þ 2F, satisfy the condition (2.1).…”

“…As was mentioned in [1], to produce a flat top output pulse the LTD cavity should contain s bricks generating the 1st harmonic, m bricks generating the 3rd harmonic, and f bricks generating the 5th harmonic, where the numbers s, m and f satisfy the condition…”

“…The OrCAD models of the LTD cavity with 5th harmonics used in this paper are almost the same as those used previously in [1]. Different are the values of the output inductance Lload (¼0.95 nH now compared to 1.2 nH in [1]) and the resistance of the core Rcore (¼51 Ohm now compared to 1 MOhm in [1]).…”

“…This paper describes the study we have undertaken to evaluate the effect of component tolerances in obtaining a voltage output flat top for a single square pulse linear transformer driver (LTD) cavity with 5th harmonics [1] and a 30 cavity voltage adder with vacuum insulated output line. Our goal was to define the necessary component value precision in order to obtain a voltage output flat top with no more than AE0.5% amplitude variation.…”

“…All these capacitors have the same dimensions (58 × 150 × 146 mm 3 ), allowing us to assemble several different configurations inside the same size cavity. These bricks provide the possibility to produce the flat top output cavity pulse with the same nominal inductance for all bricks [1].…”