Design and Construction of the LEIR Extraction Septum

Abstract

The Low Energy Ion Ring (LEIR) is part of the LHC injector chain for ions. The LEIR extraction will use a pulsed magnetic septum, clamped around a metallic vacuum chamber which plays an important role in separating the high vacuum in the LEIR ring (dynamic pressure ~ 10 -12 mbar) from that in the transfer line to the PS, where the vacuum requirements are less stringent. The major technical challenges and novel solutions related to the design of this magnet will be presented. Presented at the MT19 -19 th International Conference on Magnet Technology -September 18-23 -Genova, ItalyGeneva, Switzerland February 2006 Abstract-The Low Energy Ion Ring (LEIR) is part of the LHC injector chain for ions.The LEIR extraction will use a pulsed magnetic septum, clamped around a metallic vacuum chamber which plays an important role in separating the high vacuum in the LEIR ring (dynamic pressure ~ 10 -12 mbar) from that in the transfer line to the PS, where the vacuum requirements are less stringent. The major technical challenges and novel solutions related to the design of this magnet will be presented.

Accelerator Engineering and Technology: Accelerator Technology

“…A d.c. septum magnet is often used outside vacuum. In this case the coil and the magnet yoke can be split into an upper and a lower part allowing the magnet to be "clamped" over the vacuum chamber [192], permitting magnet and coil maintenance or repairs without breaking the accelerator vacuum ( Fig. 8.79).…”