Taking a closer look at LHC

CMS (Compact Muon Solenoid) is one of two general-purpose LHC experiments (ATLAS is the other) designed to explore the physics of the Terascale, the energy region where physicists believe they will find answersto the central questions at the heart of 21st-century particle physics: Are there undiscovered principles of nature? Is Higgs mechanism responsible for visible mass of the universe? How can we solve the mystery of dark energy? Are there extra dimensions of space? How did the universe come to be?

CMS, in collaboration with ATLAS, contributed to the discovery of a Higgs Boson.


The main volume of the CMS detector is a multilayered cylinder, some 21 m long and 16 m in diameter, weighing more than 13000 tons. The innermost layer is a silicon-based particle tracker, surrounded by a scintillating crystal electromagnetic calorimeter which is itself surrounded with a sampling calorimeter for hadrons measuring particle energies. They fit inside a central superconducting solenoid magnet (3,8 Tesla)13 m feet long and 6 m in diameter, that measures the momenta of charged particles. Outside the magnet are the large muon detectors, which are inside the return yoke of the magnet.

Some calculations ...


The CMS collaboration comprises 2300 scientists from 159 scientific institutes in 37 countries.


Xabier Cid Vidal, PhD in experimental Particle Physics for Santiago University (USC). Research Fellow in experimental Particle Physics at CERN from January 2013 to Decembre 2015. Currently, he is in USC Particle Physics Department (Spanish Postdoctoral Junior Grants Programme).

Ramon Cid Manzano, secondary school Physics Teacher at IES de SAR (Santiago - Spain), and part-time Lecturer (Profesor Asociado) in Faculty of Education at the University of Santiago (Spain). He has a Degree in Physics and in Chemistry, and is PhD for Santiago University (USC).



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