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Mechanical Features of Electron-Ring Compressors

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5 Author(s)
Avery, R.T. ; Lawrence Radiation Laboratory, University of California Berkeley, California 94720 ; Chupp, W.W. ; Hernandez, H.P. ; Meneghetti, J.R.
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The technology of electron-ring compressors draws more heavily on controlled thermonuclear research than on conventional accelerators. This is dictated by the rapidly rising, intense magnetic fields (> 50 kG in < 1 ms), the required ultrahigh vacuum (¿10-9 torr), and the need for extensive diagnostics and instrumentation during the development phase. Interesting mechanical features of the Berkeley Compressor 3, Compressor 4, and Compressor 5 electron-ring research apparatus are described, including ceramic chamber design, ceramic-metal and ceramic-ceramic joining techniques, cryopumping, vacuum bakeout practices, and novel diagnostic probes suitable for ultrahigh vacuum service.

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Nuclear Science, IEEE Transactions on  (Volume:18 ,  Issue: 3 )