Abstract
A low impedance high power microwave (HPM) driver is designed, which can be used in studying multi-gigawatt HPM devices such as the magnetically insulated transmission line oscillator (MILO), based on a helical pulse forming line (PFL) and the Tesla pulse transformer technology. The co-axial PFL is insulated by ethanol–water mixture, whose dielectric constant can be adjusted; and the helical line increases the output pulse width as well as the impedance to make a better match with the load. By the optimal combination of PFL charging voltage and output switch working voltage, the reliability of the PFL can be improved. The Tesla transformer has partial magnetic cores to increase the coupling coefficient and is connected like an autotransformer to increase the voltage step-up ratio. The primary capacitor of the transformer is charged by a high voltage constant current power supply and discharged by a triggered switch. A transmission line is installed between the PFL and the HPM load, to further increase the load voltage. A ceramic disk vacuum interface is used for improving the vacuum of the HPM tube. The experiments show that the driver can operate at 30 GW peak power, 75 ns pulse width and 5 Hz repetition rate.
Highlights
Pulsed power technologies have many applications in both industrial and military fields [1,2], and pulse generators come in various sizes and parameters, with the 33 m diameter, 80 TW Z machine in Sandia [3] and a laptop sized 50 kV, 10 kV/ns rising rate trigger generator [4]
Since High power microwave (HPM) studies require a special category of compact, repetitive pulse generators, pulsed power drivers especially devoted to HPM are widely researched, and they have a very wide range of parameters in peak power, pulse width, impedance, rep-rate, etc
The very successful SINUS series accelerators from the Institute of High Current Electronics, Tomsk, Russia, featuring in transformer oil insulated pulse forming lines (PFL) with built-in Tesla transformers, have been widely used [12,13]. They are suitable for driving high impedance (>50 Ω) HPM tubes such as the BWO [23] since the suitable for driving high impedance (>50 Ω) HPM tubes such as the BWO [23] since the oil insulated PFL has characteristic impedance in the range of dozens of ohms
Summary
Pulsed power technologies have many applications in both industrial and military fields [1,2], and pulse generators come in various sizes and parameters, with the 33 m diameter, 80 TW Z machine in Sandia [3] and a laptop sized 50 kV, 10 kV/ns rising rate trigger generator [4]. Some other accelerators have no pulse forming lines, as they use a Marx generator or a linear transformer d2riovf e13r (LTD) with a very short rise time [14,15,21] or with a pulse forming network (PFN) [19,20], and the output pulse width is not limited by the geometry length of the driver These PFLoleislsindsruivlaetresdarPeFaLlshoaasicmheadraacttedrriisvtinc gimthpeehdiagnhceiminpethdeanracnegHePoMf dlozaednssaonfdothmeys.hFavoer lmowucehr immopredcaonmcepo(
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
