Study and Application of Micrometric Alignment on the Prototype Girders of the CLIC Two-Beam Module

Abstract

The Compact LInear Collider (CLIC), currently under study at CERN, aims at the development of a Multi-TeV e + e -collider. The micro-precision CLIC RF-structures will have an accelerating gradient of 100 MV/m and will be mounted and aligned on specially developed supporting girders. The girder fabrication constraints are dictated by stringent physics requirements. The micrometric pre-alignment over several kilometers of girders, allow for the CLIC structures to fulfill their acceleration and collision functionality. Study of such girders and their sophisticated alignment method, is a challenging case involving dedicated mechanical design as well as prototype production and experimental testing.

Standardization of the Experimental Methodology for Quality Assurance and Quality Control (QA - QC) of the CLIC Structural Materials

“…The MB of the module Type-0 contains only Accelerating Structures whereas the modules of Type-1 up to Type-4 include also MB-quadrupoles of variable length. The MBquadrupoles take the place of two (2), four (4), six (6) or eight (8) Accelerating Structures (AS), respectively [3].…”

“…The module length is presently 2010 mm dictated by the mechanical and thermal stability of the overall system, along with several other technical parameters. The length of 30 mm is reserved for the inter-girder connection, which is referred to as Articulation Point [6]. The module supporting system is mechanically articulated throughout the entire length of the DB linac.…”

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“…The MB of the module Type-0 contains only Accelerating Structures whereas the modules of Type-1 up to Type-4 include also MB-quadrupoles of variable length. The MBquadrupoles take the place of two (2), four (4), six (6) or eight (8) Accelerating Structures (AS), respectively [3].…”