Title :
Design of 4-8 GHz stochastic cooling equalizers for the Fermilab Accumulator
Author :
McGinnis, D. ; Marriner, J.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
The 4-8 GHz core stochastic cooling system in the Fermilab Accumulator uses a coaxial cable transmission line to transmit signals from the pickup electrodes to the kicker electrodes. Because of the long length of the cable and the high frequency range of the cooling system, the system suffers a 40 dB gain slope and a 360 degrees phase variation across the 4-8 GHz Band. To remedy this situation, a balanced stripline equalizer was designed featuring offset coupled lines and Schiffman phase shifters. The design was optimized by defining an effective bandwidth density and programming the OUTVAR and OUTEQN blocks of the microwave CAD program TOUCHSTONE to maximize bandwidth density.<>
Keywords :
beam handling equipment; proton accelerators; synchrotrons; Fermilab Accumulator; Schiffman phase shifters; balanced stripline equalizer; coaxial cable transmission line; core stochastic cooling system; gain slope; kicker electrodes; microwave CAD program TOUCHSTONE; offset coupled lines; phase variation; pickup electrodes; Bandwidth; Coaxial cables; Cooling; Electrodes; Equalizers; Frequency; Power cables; Stochastic processes; Stochastic systems; Transmission lines;
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.1991.164645
