Ferroelectric Switch For An Active RF Pulse Compressor

Abstract

Principles and preliminary design for a microwave active pulse compressor using an electrically-controlled ferroelectric switch are presented. The design of an 11.4 GHz, 500 MW pulse compressor with a pulse width of about 40 nsec and a compression ratio of 10 is described. It is planned to test this compressor using the Omega-P/NRL X-band magnicon.

New Low-Loss Ferroelectric Materials for Accelerator Applications

“…The use of ferroelectric components has been recently proposed for both classes of linear collider active components [13][14][15], based on BST ceramic rings used to partially load cylindrical cavities. The critical requirement for ferroelectrics for successful linear colliders applications is a loss tangent no larger than 10 -3 at 11 GHz [14,15].…”

Fast Switching Ferroelectric Materials for Accelerator Applications

“…In turn this capability allows reduction of cryogenic losses at the structure and eventually significant reductions of the entire energy consumption and operating cost of the proposed collider scheme [9]. This type of fast tuner can also be employed in many other SC and conventional accelerators for amplitude and phase control optimization [9][10][11][12], for example in ERL systems.…”

“…This newly developed ferroelectric technology has been experimentally validated at the Argonne Wakefield Accelerator in a tunable DLA structure experiment [14] and is under further development at Omega-P Inc./Yale University for the demonstration of high power microwave switches and fast ferroelectric phase-shifters at both L-band for ILC and at Ka-band for high accelerating gradient research [6,8,[9][10][11][12].…”

“…Ferroelectric-based devices that have been recently proposed include: (1) ultra-fast electrically-controlled phase shifters for amplitude and phase control of superconducting and room temperature accelerators including ILC and ERLs [9]; (2) high-power switches for pulse compression systems of stand-alone sources for high-gradient tests of future CLIC-like linear colliders [10,11]; (3) tunable dielectric loaded accelerating (DLA) structures [13][14].…”

“…Fast switching low-loss ferroelectric materials [7][8] offer significant advantages for rf adjustment and tuning in both advanced and more conventional accelerators, in particular for applications involving switching and high power control [9][10][11][12]. Ferroelectric-based devices that have been recently proposed include: (1) ultra-fast electrically-controlled phase shifters for amplitude and phase control of superconducting and room temperature accelerators including ILC and ERLs [9]; (2) high-power switches for pulse compression systems of stand-alone sources for high-gradient tests of future CLIC-like linear colliders [10,11]; (3) tunable dielectric loaded accelerating (DLA) structures [13][14].…”