CERN Accelerating science

The real particles produced in the decay of a positive pion can be seen in this image from a streamer chamber. Streamer chambers consist of a gas chamber through which a strong pulsed electric field is passed, creating sparks as a charged particle passes through it. A magnetic field is added to cause the decay products to follow curved paths so that their charge and momentum can be measured.

Desintegration de pions positifs observee sur une image en fausses couleurs dans une chambre a sillages lumineux.

Keywords: event

Original ref.: EX-77-7-92