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An 805 MHz disk and washer accelerating structure with coaxial coupler for the Fermilab upgrade

Conference ·
OSTI ID:5288826
; ; ; ;  [1]; ;  [2]
  1. Fermi National Accelerator Lab., Batavia, IL (USA)
  2. Science Applications International Corp., Albuquerque, NM (USA)
The Disk and Washer (DAW) structure with four bi-periodic tees to support the washers has been studied at Fermilab for the Linac Upgrade by constructing two, 805 MHz, one-meter sections joined by a coaxial coupler. The coupler provides an rf drive port, an adjustable tuner, a vacuum port, and an enclosure for the installation of beam focussing and monitoring devices. This configuration is suitable for a high beta proton linear accelerator. The bi-periodic tee supports in the DAW structure suppress the TM{sub 11} mode at the operating frequency which has been a problem with previous designs. Frequency-mode spectra have been calculated and measured as well as the quantities Q, R/Q, and ZT{sup 2}. The structure has been evacuated and operated at high power levels and high accelerating fields. 5 refs., 4 figs., 2 tabs.
Research Organization:
Fermi National Accelerator Lab., Batavia, IL (USA)
Sponsoring Organization:
DOE/ER
DOE Contract Number:
AC02-76CH03000
OSTI ID:
5288826
Report Number(s):
FNAL/C-89/197; CONF-890803--50; ON: DE90005240
Country of Publication:
United States
Language:
English