Rosay M.,Bruker |
Blank M.,Communications and Power Industries Canada Inc. |
Journal of Magnetic Resonance | Year: 2016
Advances in dynamic nuclear polarization (DNP) instrumentation and methodology have been key factors in the recent growth of solid-state DNP NMR applications. We review the current state of the art of solid-state DNP NMR instrumentation primarily based on available commercial platforms. We start with a general system overview, including options for microwave sources and DNP NMR probes, and then focus on specific developments for DNP at 100 K with magic angle spinning (MAS). Gyrotron microwave sources, passive components to transmit microwaves, the DNP MAS probe, a cooling device for low-temperature MAS, and sample preparation procedures including radicals for DNP are considered. © 2016 Elsevier Inc. All rights reserved.
Communications and Power Industries Canada Inc. | Date: 2009-05-12
Dobbs R.,Communications and Power Industries Canada Inc. |
Steer B.,Communications and Power Industries Canada Inc.
IRMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves | Year: 2011
CPI Canada have produced EIKs and EIOs at frequencies up to 220 GHz. Recent development programs have demonstrated that the technology exists to design and build Extended Interaction devices at low THz frequencies. This paper describes current and predicted performance of these devices, the design challenges and solutions to enable this performance. © 2011 IEEE.
Joye C.D.,U.S. Navy |
Cook A.M.,U.S. Navy |
Calame J.P.,U.S. Navy |
Abe D.K.,U.S. Navy |
And 8 more authors.
IEEE Transactions on Electron Devices | Year: 2014
We present the first vacuum electronic traveling wave amplifier to incorporate an interaction circuit fabricated by ultraviolet (UV) photolithography and electroforming, demonstrating over 60 W of output power at 214.5 GHz from a 12.1 kV, 118 mA electron beam. The tube also achieved an instantaneous bandwidth of ∼15 GHz in G-band in the small signal regime. The all-copper circuit was fabricated in two layers using a UV-transparent polymer monofilament embedded in the photoresist to form the beam tunnel prior to electroforming. Effects arising from fabrication errors and target tolerances are discussed. This microfabrication technique and demonstration paves the way for a new era of vacuum electron devices that could extend into the 1-2 THz range with advances in high-current-density electron guns. © 1963-2012 IEEE.
Communications and Power Industries Canada Inc. | Date: 2010-04-27
X-ray generators for use in medical diagnostic X-ray imaging applications.