Title :
A high-power free-electron maser for RF acceleration
Author :
Hartemann, F. ; Chu, T.S. ; Papavaritis, P. ; Danly, B.G. ; Temkin, R.J. ; Faillon, G. ; Mourier, G. ; Trémeau, T. ; Bres, M.
Author_Institution :
Plasma Fusion Center, MIT, Cambridge, MA, USA
Abstract :
Results of the design and operation of a single-mode 28 GHz free-electron maser (FEM) oscillator and a 35 GHz high-gain FEM amplifier are presented and discussed. The experiment was driven by a 700 kV, 900 Omega HV modulator, and operated with a pulse length of 1 mu s at power levels in the 1-3 MW range. To obtain the 100-500 MW, 10 ns pulses required for RF acceleration at high frequencies (K/sub a/-band), frequency chirping and subsequent pulse compression of the amplified RF signal may be used. For this type of application, phase stability is critical. The oscillator can be phase-locked to a local oscillator, yielding the required phase control of the RF.<>
Keywords :
beam handling techniques; free electron lasers; masers; microwave oscillators; 1 mus; 1 to 3 MW; 10 mus; 100 to 500 MW; 28 GHz; 35 GHz; 700 kV; 900 ohm; K/sub a/-band; RF acceleration; RF pulse compression; design; frequency chirping; high-gain FEM amplifier; high-power free-electron maser; operation; phase stability; single-mode; Acceleration; Chirp modulation; Local oscillators; Masers; Operational amplifiers; Pulse amplifiers; Pulse compression methods; Pulse modulation; Radio frequency; Radiofrequency amplifiers;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164436
