RUPAC2012 - List of Authors (Zapasskii, V.S.)

Paper	Title	Page
WEPPD009	Measurement of Speed of Light Emitted by Ultrarelativistic Source	584
	A. Stirin, P. Aleksandrov, V. Korchuganov NRC, Moscow, Russia E.B. Aleksandrov IOFFE, St. Petersburg, Russia V.S. Zapasskii Saint-Petersburg State University, Saint-Petersburg, Russia
	Funding: The work was supported by the Russian Fundation for Basic Research under Project No.11-02-00538-а. The paper focuses on the results of experiments on direct measurement of speed of the light emitted by an ultrarelativistic source. The source of synchrotron radiation (SR), Siberia-1 electron storage ring at Kurchatov Institute, was used as a pulsed source of light. Experiments were made on the visible part of the SR emitted by ultrarelativistic electron bunch moving along a curved trajectory in the magnetic field of the bending magnet. The measured value of speed of the light pulse in vacuum coincided with the tabular value of the light speed within 0.5%. Results of the measurements support the second postulate of Einstein's special theory of relativity about independence of speed of light from the source velocity. The paper contains schematic of the experiment, description of its components, main parameters of Siberia-1 electron storage ring and electron bunches. Description of the method of direct measurement of light speed as well as experimental oscillograms and calculation data are also presented.

Paper

Title

Page

Measurement of Speed of Light Emitted by Ultrarelativistic Source

584

A. Stirin, P. Aleksandrov, V. Korchuganov
NRC, Moscow, Russia
E.B. Aleksandrov
IOFFE, St. Petersburg, Russia
V.S. Zapasskii
Saint-Petersburg State University, Saint-Petersburg, Russia

Funding: The work was supported by the Russian Fundation for Basic Research under Project No.11-02-00538-а.
The paper focuses on the results of experiments on direct measurement of speed of the light emitted by an ultrarelativistic source. The source of synchrotron radiation (SR), Siberia-1 electron storage ring at Kurchatov Institute, was used as a pulsed source of light. Experiments were made on the visible part of the SR emitted by ultrarelativistic electron bunch moving along a curved trajectory in the magnetic field of the bending magnet. The measured value of speed of the light pulse in vacuum coincided with the tabular value of the light speed within 0.5%. Results of the measurements support the second postulate of Einstein's special theory of relativity about independence of speed of light from the source velocity. The paper contains schematic of the experiment, description of its components, main parameters of Siberia-1 electron storage ring and electron bunches. Description of the method of direct measurement of light speed as well as experimental oscillograms and calculation data are also presented.