학술논문
Superconducting Multicell Cavity Development Program at Los Alamos
Document Type
Conference
Author
Source
Proceedings of International Conference on Particle Accelerators Particle accelerator Particle Accelerator Conference, 1993., Proceedings of the 1993. :1021-1023 vol.2 1993
Subject
Language
Abstract
The Superconducting RF Cavity Development Program at Los Alamos has designed, fabricated, and tested single-cell niobium cavities at 3 GHz and 805 MHz. This work is being done in preparation for procuring and testing a multicell niobium cavity. The multicell cavity is designed to accelerate protons at /spl beta/=0.9; initial tests will be without beam. Programmatic changes have required us to modify our plans to install a 6800 litre helium cryostat and a 12.8 g/s helium pump. We will use an installed cryostat to test the multicell cavity. Also, the cavity will be modified from a seven-cell to a four-cell structure to match the dimensions of the installed cryostat. Previous reports concentrated on 3 GHz results. In this paper, some of the latest results of the 805 MHz cavity tests are presented. Modifications to allow high pulsed power testing on 805 MHz single- and four-cell cavities are proceeding. Glow discharge cleaning of an 805 MHz niobium cavity resulted in a decrease in cavity performance. The cavity was restored to previous performance levels with buffered chemical polishing. Initial results with high-pressure water cleaning show the process is useful in restoring cavity performance.ETX