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This folder contains documents related to experiments, books and booklet that Beusch received or contributed, which include the document interview by Maurice Jacob and Emmanuele Quercigh “The CERN Omega Spectrometer 25 years of Physics”, also a another document Werner wrote in 2017 with Emmanuele Quercigh with a draft and final version of “OMEGA: An electronic Bubble Chamber”, a book about the new theory of particle “Introduction a la nouvelle theorie des particules de M.Jean-Pierre et ses collaborateur” and another book about SSC “To the heart of Matter – The Superconducting Super Collider”.

The cloud chamber, also known as the Wilson chamber, was invented in 1911 by a Scottish physicist Charles Thompson Rees Wilson. It serves as a particle detector for ionizing radiation by utilizing a sealed environment containing a supersaturated vapor of water alcohol. When a charged particle enters the chamber, it interacts with the gas molecule, knocking off electrons via electrostatic forces. This process leaves a trail of ionized gas particles that act as condensation nuclei, forming visible liquid droplets that reveal the particle’s trajectory.

The spark chamber is another type of detector that visualizes the paths of subatomic particles, but it operates using high-voltage electricity rather than vapor. It consists of stack of metal plates immersed in an inert gas, such as neon. When a charged particle, such as cosmic ray, passes through the plates, it leaves a trail of ions that triggers a series of bright, visible along its path.

While both instruments make invisible particles visible to the naked eye mechanisms differ: the cloud chamber relies on the condensation of supersaturated vapor, whereas the spark chamber uses an intense electric field to create luminous discharges. Eventually, these visual methods were replaced by electronic detectors, such as the multi-wire proportional chamber used in the OMEGA spectrometer, which allowed for faster data collection and more precise digital analysis.

Jean-Pierre Blaser (1923-2019) was a Swiss physicist who founded the Swiss Institute for Nuclear Research (SIN) in 1968 and then became a director from 1969 to 1987. However, the Swiss Institute for Nuclear Research (SIN) and Eidgenössisches Institut für Reaktorforschung (EIR) merged to create the Paul Scherrer Institute in 1988, he then became the first director of the Paul Scherrer Institute (PSI). He also worked at the Eidgenossichen Technische Hochschule Zurich (ETHZ) as a professor of Experimental Physics from 1959 to 1990. He died in 2019.