Into the yellow pipes
For the operation of the European XFEL, 800 cavities will be installed in 100 accelerator modules. The cavity production has already been outlined in the two previous stories published in LC NewsLine (and first published in DESY inForm). For their assembly, there is a weekly transport of cavities to France. From there, they return to […]
Before accelerating electrons and positrons, cavities need to undergo a number of treatments, such as chemical and electropolishing, the last one being baking. The standard baking procedure heats the cavity at 120°C for two days with an ultra high vacuum (UHV) requirement. These very restrictive conditions are unfortunately not appropriate for the treatment of 16,000 […]
Last January, engineers from the DAPNIA laboratory in Saclay France qualified a new electropolishing facility for single cell cavities. Their first electropolished cavity reaches a promising result, above 42 MV/m (megavolts per metre) of accelerating gradient. It allows them to join the global R&D effort on these cavity treatments. The newly qualified electropolishing facility at […]