Michael Hauschild takes the reader of this essential back to the beginnings of CERN, the European Organization for Nuclear Research near Geneva, Switzerland; one of the most fascinating research centres of all, its history, its people and its accelerators. The author explains how particle accelerators work and, starting from the first ideas, how the world's largest particle accelerator, the Large Hadron Collider (LHC) was built. After a two year update, the LHC was put back into operation in spring 2015 to discover the secrets of nature with higher energy than ever before. This Springer essential is a translation of the original German 1st edition essentials, Neustart des LHC: CERN und die Beschleuniger by Michael Hauschild, published by Springer Fachmedien Wiesbaden GmbH, part of Springer Nature in 2016. The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors.