DocumentCode :
2343218
Title :
Optimizing the high power input to the LBL 400 MHz proton RFQ
Author :
Howard, D. ; Caylor, R. ; Gough, R. ; Lax, J. ; MacGill, R. ; Richter, R. ; Ridgeway, W. ; Staples, J.
Author_Institution :
Lawrence Berkeley Lab., California Univ., CA, USA
fYear :
1989
fDate :
20-23 Mar 1989
Firstpage :
115
Abstract :
Based on the initial design values and results of the alignment and low-power testing of the novel 400-MHz RF quadrupole (RFQ) produced at Lawrence Berkeley Laboratory, the RF input power requirement at design gradient with full beam loading is approximately 160 kW. As the quadrant size and design limit the RF drive loop dimensions, the drive port was chosen to accept commercially available equipment of 1 5/8 in. in diameter. Available RF power sources provide 3 1/8 in. diameter coax at the output. The interface between the two coax sizes was chosen to be a 1/4 wavelength tapered section with a constant Zo of approximately 500 Ω. The 1 5/8-in. end of the tapered section is mounted directly to the RFQ cavity body. The following items are described: the method used to distribute the power handling limits more evenly; gradients and relative safety factors along the length of the tapered section; impedance matching sections; limiting factors and their subsequent treatment; and high-power test results
Keywords :
beam handling equipment; optimisation; proton accelerators; 400 MHz; RF drive loop dimensions; RF power sources; RF quadrupole; alignment; coax sizes; design gradient; design limit; drive port; high power input; high-power test results; impedance matching sections; interface; limiting factors; low-power testing; power handling limits; proton RFQ; quadrant size; relative safety factors; tapered section; Assembly; Coaxial components; Drives; Impedance; Laboratories; Power system reliability; Protons; Radio frequency; Testing; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
Type :
conf
DOI :
10.1109/PAC.1989.73030
Filename :
73030
Link To Document :
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