Zobrazeno 1 - 10
of 59
pro vyhledávání: '"C M, Armstrong"'
Autor:
C. M. Armstrong
Publikováno v:
IEEE Spectrum. 49:36-41
Anyone hoping to exploit this promising region of the electromagnetic spectrum must confront its very daunting physics. Wirelessly transfer huge files in the blink of an eye! Detect bombs, poison gas clouds, and concealed weapons from afar! Peer thro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8d59f733634f921d1c9a304771c1c5f
https://doi.org/10.1109/mspec.2012.6281131
https://doi.org/10.1109/mspec.2012.6281131
Autor:
Gun-Sik Park, C. M. Armstrong, S.Y. Park, R.H. Kyser, A. K. Ganguly, J. J. Choi, R. K. Parker
Publikováno v:
Physical Review Letters. 74:2399-2402
The first operation of a two-stage tapered gyrotron traveling wave amplifier employing two tapered waveguide circuits and tapered magnetic fields is reported. Small-signal gain of 30 dB and saturated gain of 25 dB over a 20% bandwidth at an efficienc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd69b4b8b48af4bfd2590a5a1e90ac7f
https://doi.org/10.1103/physrevlett.74.2399
https://doi.org/10.1103/physrevlett.74.2399
Publikováno v:
Physics of Plasmas. 2:915-922
A compact, low cost gyrotron traveling‐wave‐tube (gyro‐TWT) amplifier capable of producing high‐power, broadband, millimeter wave radiation is reported. The interaction circuit is a periodic, magnetic field plane (H plane) bend, transverse fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8637f9a5d9409ca0a6039e36122f8b0
https://doi.org/10.1063/1.871372
https://doi.org/10.1063/1.871372
Publikováno v:
IEEE Transactions on Electron Devices. 42:348-355
A general dispersion relation for slow wave cyclotron traveling wave interaction in a folded waveguide is derived from a fluid dynamical treatment. The serpentine structure is formed by folding a double-ridged rectangular waveguide so that the orient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a014ae43fb7f201f3d42c592e0e73a59
https://doi.org/10.1109/16.370058
https://doi.org/10.1109/16.370058
Publikováno v:
IEEE Transactions on Electron Devices. 42:1681-1685
A three-stage, mixed geometry gyrotwystron amplifier has recently been operated and characterized at 4.5 GHz. Gyrotwystrons are hybrids of the gyroklystron and gyro-traveling-wave tube (gyro-TWT) amplifiers. In the device which was studied, the first
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::358b41cb08f3a6f22e104647214c5c86
https://doi.org/10.1109/16.405284
https://doi.org/10.1109/16.405284
Publikováno v:
Physics of Plasmas. 1:2058-2062
Numerical simulations of a W‐band two‐stage tapered, frequency multiplied gyrotron‐ traveling‐wave‐tube amplifier are reported. Unlike conventional harmonic gyrodevices, a drive signal at the fundamental harmonic frequency is injected in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afb7bcf1e7c12473456dee1474b48f99
https://doi.org/10.1063/1.870600
https://doi.org/10.1063/1.870600
Publikováno v:
IEEE Transactions on Plasma Science. 22:465-475
A two-stage slow wave cyclotron amplifier is investigated to demonstrate a high power, stable, and broad Ka-band radiation source, operating at a low beam power (/spl sim/60 kV, /spl sim/5 amps) and a low magnetic field (/spl sim/7 kG). A linear theo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b95b5e645d58955555875fa2a6e7e29c
https://doi.org/10.1109/27.310656
https://doi.org/10.1109/27.310656
Publikováno v:
Physics of Fluids B: Plasma Physics. 5:1639-1646
A linear analysis for a gyrotron backward wave oscillator operating at a general transverse electric (TEln) mode of a cylindrical waveguide (slotted or uniform cross section) has been developed using a Maxwell–Vlasov equation under the tenuous beam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a12594949ce7e184ade2fcee1a9712ce
https://doi.org/10.1063/1.860960
https://doi.org/10.1063/1.860960
Publikováno v:
Physics of Fluids B: Plasma Physics. 5:1349-1357
Based on an equivalent circuit representation of a cavity impedance, a theoretical model of the cavity excitation by a modulated electron beam is developed. The beam current modulation is initiated by the first cavity and amplified in drift section b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::000c4c9654b13f890b16bd5c1d914ddd
https://doi.org/10.1063/1.860924
https://doi.org/10.1063/1.860924
Publikováno v:
The Journal of Physiology. 456:453-471
1. Synaptic currents were recorded in voltage-clamped cerebellar Purkinje cells using the tight-seal whole-cell recording technique. Cells were dialysed with a CsCl solution and were held at -60 or -70 mV. Inhibitory interneurones (basket and stellat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce4693a7954468b7adf35997ac4f01df
https://doi.org/10.1113/jphysiol.1992.sp019346
https://doi.org/10.1113/jphysiol.1992.sp019346