PFC / JA - 93 - 21 Experimental study of a 28 GHz high - power long - pulse

نویسندگان

  • B. G. Danly
  • G. Gulotta
چکیده

Experimental results of the first efficient operation of a long pulse cyclotron autoresonance maser (CARM) oscillator are presented. Output power of 1.9 MW for a beam energy of 450 keV and current of 80 A, corresponding to an efficiency of 5.2%, has been measured at 27.8 GHz in the TE1 , mode of a Bragg resonator. The observed frequency of the CARM emission corresponds to a Doppler upshifted frequency of 2.9 times the relativistic cyclotron frequency. A significant mode competition between the TE1 , and a TMOI mode is present.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

PFC/JA-87-28 Generation of Short Pulses of Coherent Electromagnetic Radiation in a Free-Electron Laser Amplifier

Theoretical and experimental studies of the evolution of a frequency-chirped pulse under the influence of both phase and gain dispersive effects induced by the free-electron laser (FEL) interaction are presented. For the experimental parameters used (electron beam voltage V ~ 150 kV, wiggler periodicity i.. = 3.5 cm, gain 10 dB, input pulse width At 200 ns, frequency wo/2r i10 GHz and frequency...

متن کامل

Development of 1MW Gyrotron and Progress of ECH System for the GAMMA 10 Tandem Mirror in Tsukuba

High power gyrotrons with TE4,2 cavity at 28 GHz and with TE18,6 cavity and a diamond window at 77 GHz have been developed for GAMMA 10 and LHD in the joint program of NIFS and University of Tsukuba. The maximum outputs of 570 kW at 28 GHz and 1.1 MW at 77 GHz were obtained corresponding to each design. The operations of more than 750 kW for 5 sec. and 810 kW for 3.5 sec. were achieved in the d...

متن کامل

PFC / JA - 90 - 43 Induction Linac Driven Relativistic

Design and experimental results are presented from two high power microwave generation experiments utilizing a high repetition rate induction linac generated electron beam. A relativistic klystron has generated more than 100 MW microwave pulses in X-band for 50 ns without pulse shortening or breakdown. Design studies for the first cyclotron autoresonance maser (CARM) amplifier using an inductio...

متن کامل

PFC / JA - 87 - 32 Stabilization of Sawteeth By Lower Hybrid Waves in the Alcator

Sawteeth have been suppressed by lower hybrid current drive in high density Alcator C plasmas. At a density of 1.1 x 101 4 cm-3 and q(a) = 4.7 the sawteeth were eliminated by application of P,.f = 600 kW at 4.6 GHz, which represents an estimated 30% of the rf power required to fully sustain the discharge in the absence of ohmic power. Strong electron heating is observed with both current drive ...

متن کامل

Treatment of lentigines by a novel high power diode laser at 755 nm: a case report

The use of high-power diode laser with a wavelength of 755 nm is an effective and safe method for the correction and partial and/or total elimination of pigmented lesions, specifically solar lentigines. This wavelength has yet not been used in diode lasers to treat solar lentigines. Side effects are the usual ones, including darkening and scab formation. Our patient was a 40-year-old woman of C...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014