Communications and Power Industries Canada Inc.

Georgetown, Canada

Communications and Power Industries Canada Inc.

Georgetown, Canada

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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.


Rosay M.,Bruker | Blank M.,Communications and Power Industries Canada Inc. | Engelke F.,Bruker
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.


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.


Cauffman S.,Communications and Power Industries Canada Inc. | Blank M.,Communications and Power Industries Canada Inc. | Borchard P.,Communications and Power Industries Canada Inc. | Felch K.,Communications and Power Industries Canada Inc.
IRMMW-THz 2015 - 40th International Conference on Infrared, Millimeter, and Terahertz Waves | Year: 2015

A 140 GHz gyrotron capable of producing output powers up to 900 kW for 1000-second pulses has been developed at CPI. Factory testing demonstrated 1000-second operation at the 25 A CW current limit of the test facility, at which the output power was about 500 kW, and demonstrated 900 kW operation for short pulses. The gyrotron was then shipped to Hefei, China, and installed as part of the electron cyclotron heating and current drive system for the EAST tokamak. Commissioning of the gyrotron at the EAST site is currently in progress, with the goal of demonstrating operation at full parameters (900 kW for 1000-second pulses). © 2015 IEEE.


Cauffman S.,Communications and Power Industries Canada Inc. | Blank M.,Communications and Power Industries Canada Inc. | Borchard P.,Communications and Power Industries Canada Inc. | Felch K.,Communications and Power Industries Canada Inc.
2016 IEEE International Vacuum Electronics Conference, IVEC 2016 | Year: 2016

CPI has been developing megawatt-class gyrotrons for fusion plasma heating and current drive for a range of frequencies in the mm-wave regime. Gyrotrons at 110 GHz, 117.5 GHz, 140 GHz, and 170 GHz have been designed and fabricated, and have undergone initial factory testing. Some systems have been delivered for commissioning at fusion research facilities, while several await modification following initial test results. Design features and available test data for each design will be presented. © 2016 IEEE.


Cauffman S.,Communications and Power Industries Canada Inc. | Blank M.,Communications and Power Industries Canada Inc. | Borchard P.,Communications and Power Industries Canada Inc. | Felch K.,Communications and Power Industries Canada Inc.
ICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams | Year: 2015

CPI is developing gyrotrons for fusion plasma heating and current drive at several frequencies. The VGT-8115 gyrotron is a 110 GHz, 1.2 MW, 10-second gyrotron. CPI has recently delivered two such devices. The VGT-8117 gyrotron is a 117.5 GHz, 1.5-1.8 MW, 10-second gyrotron. CPI recently performed short-pulse testing of the first such device, producing up to 1.8 MW of output power with electrical efficiencies of up to 42%. Extension of operation to long pulse lengths was hampered by high-voltage standoff problems, which will be addressed during a planned rebuild of the gyrotron. The VGT-8141 gyrotron is a 140 GHz, 900 kW, 30-minute gyrotron. CPI recently completed factory testing of one such device, which will be shipped to Hefei, China, for use in plasma heating and current drive experiments on the EAST tokamak. A nearly identical system, the VGT-8141A, incorporates a modified internal mode converter to allow operation at both 140 GHz and 104 GHz, and is currently being fabricated for use with the W7-X stellarator in Greifswald, Germany. The VGT-8170 gyrotron is a 170 GHz, 500 kW, 1000-second gyrotron designed with a design goal of producing up to 1 MW. The most recent iteration of this gyrotron produced over 1 MW during short-pulse factory testing, for a beam current of 50A, and produced over 500 kW for a beam current of 25A. Long-pulse testing of this gyrotron is still in progress. Further details regarding the design and performance of these systems are presented. © 2014 IEEE.


Blank M.,Communications and Power Industries Canada Inc. | Borchard P.,Communications and Power Industries Canada Inc. | Cauffman S.,Communications and Power Industries Canada Inc. | Felch K.,Communications and Power Industries Canada Inc.
Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015 | Year: 2015

A 140 GHz gyrotron capable of producing output powers up to 900 kW for 1000 second pulse durations has recently been developed and demonstrated at CPI. In July of 2014, the gyrotron was shipped to Hefei, China for use in the electron cyclotron heating and current drive (ECH&CD) system at the EAST tokamak. Installation of the gyrotron at EAST is complete and initial operation is underway. Design features of the gyrotron, results of the experimental demonstration at CPI, and the status of demonstrations in China will be discussed. © 2015 IEEE.


Dobbs R.,Communications and Power Industries Canada Inc. | Hyttinen M.,Communications and Power Industries Canada Inc. | Steer B.,Communications and Power Industries Canada Inc.
14th IEEE International Vacuum Electronics Conference, IVEC 2013 - Proceedings | Year: 2013

A CW 48 GHz 500 Watt saturated 250 MHz Extended Interaction Klystron (EIK) has been developed and delivered for use in the ESA Alphasat program. Designed for integration into a new CPI Satcom Division High Power Amplifier (HPA), this EIK may be operated in a linear mode up to 300 Watts rated output power, with performance optimized at 75 Watts. The EIK is temperature stabilized over a 60°C temperature range such that no field adjustment is required. This paper summarizes design parameters and test results. © 2013 IEEE.


Felch K.,Communications and Power Industries Canada Inc. | Blank M.,Communications and Power Industries Canada Inc. | Borchard P.,Communications and Power Industries Canada Inc. | Cauffman S.,Communications and Power Industries Canada Inc.
EPJ Web of Conferences | Year: 2015

Two megawatt-class gyrotrons at frequencies of 117.5 GHz and 170 GHz have recently been fabricated and tested at CPI. The 117.5 GHz gyrotron was designed to produce up to 1.8 MW for 10-second pulses, and will be used for electron cyclotron heating and current drive on the DIII-D tokamak at General Atomics. The 170 GHz gyrotron is specified as a 500 kW CW system, but has been designed with the goal of generating up to 1 MW CW. Oak Ridge National Laboratory will use the gyrotron in ITER ECH transmission line testing. © Owned by the authors, published by EDP Sciences, 2015.


Trademark
Communications and Power Industries Canada Inc. | Date: 2010-04-27

X-ray generators for use in medical diagnostic X-ray imaging applications.

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