Project Description: 

The Coaxial Pulse Conditioner can improve the pulse stability (also known as pulse flatness) and repeatability (pulse-to-pulse stability) of pulsed power systems from typical industrial standard +/- 1 % down to +/-0.02 % or better.

The Coaxial Pulse Conditioner operates by active modification of the pulse waveform using, in its simplest form, a resistance, an inductance and an RF power transistor in a stand-alone device. This enables the Coaxial Pulse Conditioner to be connected to, and disconnected from, a modulator without modifying the modulator or altering its design or topology: providing a flexible option that can be integrated into new or existing pulse power systems. It also does not need to be ground-referenced, as is the case with the analogue modulation layer in an inductive adder.

The improved pulse stability provided by the Coaxial Pulse Conditioner could increase the achievable resolution in applications such as radars and X-ray sources. In radiotherapy and proton therapy facilities, the improved stability could improve the precision of the dose that is given to a patient. In synchrotron light sources, the improved stability could improve the achievable emittance, which is a key measure of machine performance.

The technology is based on the modulation layer concept used in some inductive adders, in which a stack of inductive adders with active analogue modulation layers can be used as a pulse conditioner.


  • Licensing of proprietary CERN designs (know-how)
  • Consultancy


Referenced in the conclusion of J. Holma, M.J. Barnes, “Measurements on a 12.5/17.5 kV Inductive Adder with Extremely High Stability for the Damping Ring Kickers of the Compact Linear Collider at CERN”, Publ. in: 2019 21st European Conference on Power Electronics and Applications (EPE ‘19 ECCE Europe), DOI: 10.23919/EPE.2019.8915001

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