High Energy Physics

DTI's high power modulators and power supplies are used world wide in demanding research applications in the U.S. Department of Energy's national laboratories, leading universities, and overseas research facilities.

PowerMod systems are employed in RF power systems for accelerators and fusion systems, and in power conditioning and test of high power microwave tubes, such as klystrons and gyrotrons, where careful control of voltage, pulsewidth, and PRF, at very high power (20 MW +) and voltage (100 kV +) is required. In addition, fast-switching DTI systems can replace typical mercury ignitron crowbars by intercepting arcs before damage is done to the VED. The high voltage can be turned back on as soon as the arc clears, with nearly imperceptible interruption.

Below is a list of publications relating to DTI's technology in High Energy Physics applications.

Pulsed Power Systems for ESS Klystrons (2016) - A two page technical paper describing DTI's long pulse modulator technology for the European Spallation Source (ESS) klystron testing. (323 kB)

Affordable, Short Pulse Marx Modulator (2015) - A three page paper describing the architecture of a 100 kV - 500 kV, 500 A, 0.2 - 5.0 µs risetime modulator based on a novel Marx bank design. Presented at the 2015 Particle Power Conference. (515 kB)

Pulsed High Power Amplifiers (2015) - A three page paper describing the architecture and development of two recent short pulse klystron modulators delivered by DTI to Daresbury Laboratory and Lawrence Berkeley National Laboratory. Presented at the 2015 Pacific Symposium on Pulsed Power. (635 kB)

A Stripline Kicker for the Next Generation Light Source (2015) - A four page paper describing the architecture of a kicker driver, based on specifications for the Next Generation Light Source injectors. Presented at the 2015 Pacific Symposium on Pulsed Power. (594 kB)

Thyratron Replacement (2015) - A two page paper describing DTI's efforts to design a form-fit-function replacement for the klystron modulator thyratrons at the Standford Linear Accelerator Center using solid-state transistors. Presented at the 2015 Pacific Symposium on Pulsed Power. (385 kB)

Robust High-Average-Power Modulator_(2013) - A two page paper, presented at the 2013 International Vacuum Electronics Conference, describing DTI's design for a long pulse modulator meeting the requirements of the European Spallation Source modulators, funded under a US DOE grant. (284 kB)

Solid-State Long Pulse Marx Modulator_(2012) - A three page paper, presented at the 2012 International Pulse Modulator High Voltage Conference, describing the implementation of the Marx topology to produce a long pulse modulator intended to be used as a test platform for International Linear Collider class klystrons. (579 kB)

Modular Multipurpose Amplifier (2010) - A two page paper presented at the 2010 International Vacuum Electronics Conference describing a cost-reduced RF amplifier design that can produce outputs at different frequencies by changing the output tube and drive amplifier, while retaining common power supplies, communication, and controls. (262 kB)

A Klystron Power System for the ISIS Front End Test Stand (2009) - A four page paper, presented at the 2009 Pulsed Power Conference, describing a DTI developed power system to drive a Toshiba E3740A klystron installed at the Rutherford Appleton Laboratory (UK) in December 2008. (134 kB)

Solid-State Tetrode Test Stand _(2009) - A three page paper describing a 500 kW DC test stand developed by DTI and installed at Burle Industries, Lancaster, PA in March 2009. The test stand is used to evaluate tetrodes for the Rutherford Appleton Laboratory's (UK) ISIS system. (139 kB) 

Marx Bank Technology for Accelerators and Colliders_(2008)- A Four page paper describing DTI's work in developing long-pulse and short-pulse solid-state modulators suitable for a wide range of high energy applications. This paper was presented at the 2008 European Pulsed Power Conference. (100 kb)

Solid-State Modulators for the International Linear Collider (2006)-A three page paper describing DTI's "hard switch" and Marx bank topologies for modulators that can meet the requirements for the International Linear Collider. Paper was presented at the 2006 Power Modulator Conference. (163 kb)

A Solid-State 2 MW Klystron Power Control System (2005)
-A four page technical paper describing the use of DTI's technology in the development of a solid-state opening switch. The switch is part of a complete klystron power supply system delivered to the Advanced Photon Source at Argonne National Lab. This paper was presented at the 2005 Particle Accelerator Conference. (196kb)

A 500 kV Power System for a Gridded Sheet Beam Klystron (2004) -Four page paper describing DTI's design of the power electronics for the sheet beam klystron at SLAC. The electronics include a 500 kV multiplier power supply, a 10 kV grid modulator, a multi-concentric high voltage cable and an advanced, re-entrant interface between the cable and the klystron. (579 kb)

A Review of Solid State Modulators_(2002) - This paper, written by E.G. Cook of Lawrence Livermore Laboratory, is a thorough review of the current state-of-the-art in solid state modulators. (201 kb)

Solid State Modulator for Klystron/Gyrotron Conditioning, Testing, and Operation (2000) - A four page technical paper describing the use of DTI's 140 kV, 500 A switch for testing of high voltage klystrons and gyrotrons. Presented at the 2000 International Power Modulator Symposium. (266 kb)

Solid-State Pulsed Power Systems (1998) - A four page technical paper describing the basics of DTI's high power, solid-state systems. Explains operation and benefits of our PowerMod™ line of modulators and power supplies. (340 kb)