Electronics for damping transverse instabilities for the Fermilab booster synchrotron
Transverse instabilities are controlled by an active beam damper which corrects the orbit of individual proton bunches in the Fermilab Booster synchrotron. The corrective signals, which are in reality processed versions of the beam pick-up data, are applied to the beam via power amplifier/deflector electrodes approximately one turn after sensing the bunch position. The electronic systems of the damper are configured as a closed-loop feedback arrangement. A unique feature of the described damping electronics is that the feedback loop delay time is continuously adjusted such that the arrival time of the deflector signals correspond on a one-to-one time basis with the specific bunches needing orbit correction. Control of the loop delay throughout a machine ..beta.. variation of 0.57 to 0.99 is achieved with 2.7 nsec resolution over a 1400 nsec variable delay range. A 9 bit digital delay controller adjusts the delay during each machine cycle. The described beam damper operates with beam intensity variations of 30 dB, repetition rate variations approaching one octave (30 to 53 MHz), and with bunching related beam pulse half-width variation of 12 to 2 nsec. A brief outline is presented of the overall damper system configuration, and a description is given of the beam position detector, coaxial cable delay system, and data receiver.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL
- OSTI ID:
- 7087232
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. NS-24:3; Conference: Particle accelerator conference, Chicago, IL, USA, 16 Mar 1977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FERMILAB ACCELERATOR
CONTROL SYSTEMS
BEAM MONITORS
BEAM POSITION
DAMPING
FEEDBACK
INSTABILITY
PARTICLE BOOSTERS
PROTON BEAMS
ACCELERATORS
BEAMS
CYCLIC ACCELERATORS
MEASURING INSTRUMENTS
NUCLEON BEAMS
PARTICLE BEAMS
SYNCHROTRONS
430300* - Particle Accelerators- Auxiliaries & Components