Marx Bank Technology for Accelerators and Colliders

Abstract

Diversified Technologies, Inc. (DTI) has developed high power, solid-state Marx Bank designs for a range of accelerator and collider designs. We estimate the Marx topology can deliver equivalent performance to conventional designs, while reducing system costs by 25-50%.In this paper DTI will describe the application of Marx based technology to two different designs: a long-pulse ILC focused design (140 kV, 160 A, 1.5 ms), and a shortpulse design (500 kV, 265 A, 3 µs). These designs span the known requirements for future accelerator modulators. For the ILC design, the primary challenge is minimizing the overall size and cost of the storage capacitors in the modulator. For the short-pulse design, the primary challenge is high speed operation, to limit the energy lost in the pulse rise-time while providing a very tight (+/-3%) voltage flattop. Each design demands unique choices in components and controls, including the use of electrolytic capacitors in the ILC Marx design. This paper will review recent progress in the development and testing of both prototype Marx designs, built under two separate DOE Phase II SBIR grants.

Modification of Marx generator with a doubling of output voltage

“…Detailed grounds for the advantages of using IGBTs in such circuits are given in [4][5][6]. Detailed grounds for the advantages of using IGBTs in such circuits are given in [4][5][6].…”

“…With the application of isolated gate bipolar transistors (IGBT) as switches, the Marx circuit has become widely adopted. Detailed grounds for the advantages of using IGBTs in such circuits are given in [4][5][6]. Storage capacitors in these circuits are charged via two branches of inductors connected in series and a circuit of diodes connected in series.…”