This process specification is for manufacture of cantilever spring blades for Advanced LIGO. It includes material requirements, limitations on shaping, detail on the nickel plating process and details of the age hardening fixture. These springs are for use in an Ultra-High Vacuum (UHV) system.
v14 Calum Torrie. For clarity a flowchart is given in figure 1 outlining the steps involved in the default process and alternative process. Else no changes. 12/21/2018
v13 Note added by Norna 31st May 2018.
The two sentences in section 2.2. which have been in and out of this document (see notes on v11 page ) were removed again in this version.