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A 95 GHz gyrotron capable of generating CW power levels in excess of 2 MW is currently under development at CPI. Recently, peak output powers in excess of 1.9 MW were demonstrated with measured efficiencies of 40%. Detailed test results and future plans will be presented.
A 95 GHz gyrotron capable of generating CW power levels in excess of 2 MW is currently under development at CPI. The gyrotron employs a single-anode electron gun that produces a 90-kV, 75-A electron beam for interaction with the TE22,6,1 cavity mode. Output power from the cavity is transformed into a fundamental Gaussian beam using an internal converter that consists of a waveguide launcher and three...
Summary form only given. A 95 GHz gyrotron capable of generating CW power levels in excess of 2 MW is currently under development at CPI. The gyrotron makes use of a single-anode electron gun that produces a 90-kV, 75-A electron beam for interaction with the TE22,6,1 cavity mode. Microwave power produced in the interaction cavity is transformed into a fundamental Gaussian beam using an internal waveguide...
A 25 W CW gyrotron operating at 263 GHz has been designed, fabricated, and demonstrated. Experimental results, which include power tuning curves and infrared images of the output beam, will be presented.
Summary form only given: Dynamic nuclear polarization (DNP) can be used to increase the sensitivity of nuclear magnetic resonance (NMR) experiments by transferring the much higher polarization of unpaired electrons spins to nuclear spins. The polarization transfer is driven by high frequency millimeter wave irradiation. Communications and power industries is an original equipment manufacturer of gyrotron...
Summary form only given: A 95 GHz, multi-megawatt continuous-wave (CW) gyrotron oscillator is currently under development at CPI. The initial experimental campaign demonstrated peak output power levels up to 1 MW at 40 A beam current for pulse lengths up to 5 ms, and output power of 630 kW at 25 A beam current for pulse lengths up to 15 s. Modifications to the CPI test stand were then implemented...
A 95 GHz, multi-megawatt continuous-wave (CW) gyrotron oscillator is currently under development at CPI. During the initial experimental campaign peak output power levels up to 1 MW at 40A beam current were demonstrated at pulse lengths up to 5 ms. In addition, pulses up to 15 s in duration at 25 A beam current, the long-pulse limit of the CPI test stand, and 630 kW peak output power were achieved...
Summary form only given. A 95 GHz, multi-megawatt continuous-wave (CW) gyrotron oscillator is currently under development at CPI. The gyrotron consists of a single-anode magnetron injection gun designed to operate at 75 A and 90 kV, a TE22,6 mode cylindrical interaction cavity, an internal mode converter to transform the TE22,6 mode to a Gausssian beam, an edge- cooled CVD diamond output window, and...
A 95 GHz, multi-megawatt continuous-wave (CW) gyrotron oscillator is currently under development at CPI. The gyrotron consists of a single-anode magnetron injection gun designed to operate at 75 A and 90 kV, a TE22,6 mode cylindrical interaction cavity, an internal mode converter to transform the TE22,6 mode to a Gausssian beam, an edge-cooled CVD diamond output window, and a single-stage depressed...
As part of an ongoing program to develop a high power mm-wave source for use on a mobile platform, CPI is developing two prototype gyrotrons designed to produce more than 2 MW of output power at a frequency of 95 GHz. The first prototype employs a cylindrical noncoaxial interaction circuit designed to operate in the TE22,6 mode, and is currently undergoing preliminary factory testing (discussed at...
The initial prototype of a 95 GHz, 2.5 MW continuous-wave (CW) gyrotron oscillator is currently being prepared for factory testing at Communications and Power Industries (CPI). The gyrotron employs the TE22,6 interaction mode in a cylindrical cavity, a diode electron gun, an internal quasi-optical converter, an edge-cooled chemical vapor deposition (CVD) diamond output window, and a single-stage depressed...
Results of simulation and testing of a gyrotron in a high-temperature superconducting magnet are described. The high-temperature magnet was designed as a replacement for an existing low-temperature magnet. Magnetic materials were incorporated into the high-temperature magnet's cryostat, in order to achieve the fringing field profile required for compatibility with the gyrotron. Nevertheless, the shape...
Summary form only given. High-power, long-pulse or CW millimeter-wave sources are required for electron cyclotron heating (ECH) and current drive in magnetic fusion experiments. To further reduce system cost and improve reliability we have developed and built a prototype 110 GHz, with output power greater than 1 MW and a single-stage, depressed collector. In this paper, we report on the long-pulse...
Collagen was covalently linked to the surface of Titanium (Ti) by a surface modification process involving deposition of a thin film from hydrocarbon plasma followed by acrylic acid grafting. The composition and properties of surface-modified Ti were investigated by a number of surface sensitive techniques: XPS, ATR-IR, atomic force microscopy and AFM force-separation curves. In vitro tests were performed...
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