Title :
Vacuum simulation of RF cavities to optimize pump configurations
Author :
Shen, S. ; Tung, L.S.
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
Abstract :
The pressure history in the components of an RF linac has been modeled using Mathematica. Specifically the Cavity Coupled Drift Tube Linac (CCDTL) and Cavity Coupled Linac (CCL) sections of the Accelerator Production of Tritium (APT) plant [2] have been modeled in order to predict the optimal pump configuration over the 224 meter length. The pressure history in up to 43 sub-volumes within three representative modules (about three meters long) is analyzed in detail. Included in our model are time-dependent outgassing rates and pressure dependent pump speeds. With this information, we solve for the pressure history during roughing and with turbo and ion pumps. The number and size of each pump is optimized to achieve the desired pressure with minimal costs
Keywords :
accelerator RF systems; accelerator cavities; ion pumps; linear accelerators; outgassing; pressure; vacuum pumps; APT facility; CCDTL; Cavity Coupled Drift Tube Linac; Cavity Coupled Linac; RF cavities; RF linac; ion pump; optimal pump configuration; outgassing rate; pressure; pressure history; pump speed; turbo pump; Elementary particle vacuum; Geometry; History; Laser excitation; Linear particle accelerator; Mathematical model; Particle beams; Predictive models; Radio frequency; Vacuum systems;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795552
