50 MHz 12 MW induction linac current modulator

Conference · Wed May 17 04:00:00 EDT 1989

DOI:https://doi.org/10.1109/PPC.1989.767418· OSTI ID:5831933

Bowles, E. E.; Turner, W. C.

This paper describes a scheme to control the intrapulse energy variations of long pulse bursts of an induction linac. Analog control over the electron beam injector current is exercised in such a way that accelerator beam load variations compensate for thermal impedance variations of the accelerator cell ferrites. Circuit topology and test data are presented. The circuit uses 64 planar triodes to modulate the shunt impedance of two induction cells of the electron beam injector. Delayed feedback is used to apply a control signal to the modulator that varies the injector current to null the interpulse beam energy sweep at the linac output. The modulator exerts analog control over the top 5% of the beam current. It operates at a 60-ns pulse width and at up to a 0.1% duty factor. 8 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5831933
• Report Number(s): UCRL-100316; CONF-890665-43; ON: DE89016641
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ACCELERATORS
BEAM CURRENTS
BEAMS
CONTROL SYSTEMS
CURRENTS
ELECTRON BEAMS
FREE ELECTRON LASERS
LASERS
LEPTON BEAMS
LINEAR ACCELERATORS
OPERATION
PARTICLE BEAMS