Solid state modulator pdf

Simple modulators for solidstate transmitters simple am modulators work by varying the amount of power flowing through the transistor which is serving as the rf output amplifier. Solidstate high voltage pulse modulators for high power microwave applications dr. Note that the switch successfully opens interrupts a fault current of nearly 700 a. Conference paper pdf available in power modulator symposium, 1994. Unlike some other solidstate modulators, no semiconductor switches are placed in. Recent improvements in both the speed and peak power capabilities of semiconductor devices developed for the power conditioning and traction industries. Solidstate modulators for pulsed power applications have been a goal since the first fast highpower semiconductor devices became available.

Electrical tether systems uav high voltage power supplies. Solid state modulator upgrades replace vacuum switch tubes extend life much higher reliability flexibility oncology treatment irradiation of food mail high power xray inspection systems 15 kv, 2500 a solid state switch. Available for most commonly used magnetrons pulse widths. Brooksby, bechtel nevada abstract the next linear collider accelerator proposal at slac requires a high efficiency, highly reliable, and low cost pulsed power modulator to drive the x band klystrons. Mpt5839 series direct switching solidstate modulator. Solid state radar modulators conference paper pdf available in power modulator symposium, 1994. A concrete example of this clw modulator named after the inventors, crewson. These switches typically open and close in less than 100 500 ns, depending on their power rating. The lower part of figure 5 shows this current protection in action.

Dti has successfully developed and demonstrated a highly efficient and reliable new approach to solid state. Radtec currently produces solid state igbt modulators in sizes from 28 kw to 1 mw. Stateoftheart solid state pulse modulators cern indico. Dti has recently completed two very different solidstate marx modulators one at 500 kv and microsecond scale pulses, and the second at 120 kv and millisecond. Improved reliability less downtime is the result of a conservative, fully solid state design. By using new solidstate power modulators, the required power can be delivered more effectively. Three programmable widths, selectable by external control. Dti modulator product map 100 500 3000 5000 curren t a 20 50 100 200 500 voltage kv hvpm series advanced development sssm hvpm custom sssm custom parallel modules solid state switch modules sssm fastest solid state induction modulator for slac nlc r. These new solid state devices offer the promise of higher efficiency and longer lifetimes at a time when availability of standard technologies is becoming questionable. Us5905646 for klystrons, magnetrons and other applications requiring precisely regulated rectangular pulse trains. Dti further demonstrated a 400khz capability at lower voltage, figure 7 far exceeding both the 5 khz level nrl was able to achieve with. The prototype solid state induction modulator for slac nlc.

The modulator uses multiple solidstate modules stacked in an inductiveadder configuration. Dod and at commercial sites utilize tetrodes or thyratronspfns for high prf pulse modulation. High voltage solid state modulators archives polarity inc. Solid state igbt modulator sst350 solid state modulator installed in eec radar system specifications modulator technology. Cook, lawrence livermore national laboratory, usa abstract solidstate modulators for pulsed power applications have been a goal since the first fast highpower semiconductor devices became available. Solid state modulator for klystrongyrotron conditioning, testing and operation diversified technologies, inc. Solidstate modulators for the international linear collider. When used as a pulse modulator, the opening and closing of the switch is controlled by a. Solid state pulse modulators laboratory for high power electronic. The radtec solid state igbt modulator provides the following benefits. Solidstate modulator for klystrongyrotron conditioning, testing and operation diversified technologies, inc.

Solid state modulator for klystrongyrotron conditioning, testing, and operation. Solidstate high voltage pulse modulators for high power. In 1999, dti demonstrated a prototype 20 kv, 100 khz modulator for this transmitter. Typical topology of solid state pulse modulator systems. Dti has successfully developed and demonstrated a highly efficient and reliable new approach to solid state switching that. The mpt5839 manual contains further details of the control system interface. Solid state radar modulators diversified technologies,inc. Solid state modulator principles in its simplest configuration, solid state technology provides a fast, high current series switch, or circuit breaker. Solidstate modulator for klystron gyrotron conditioning. Pulse transformer driven by insulated gate bipolar transistors igbt magnetron supported.