Speaker
Mr
Vasilii Stepanov
(Budker INP SB RAS)
Description
For effective generation of THz-radiation in experiments on beam - plasma interaction the relativistic electron beam with small angular divergence of the electrons and high current density is required. To produce such beams at electron energy $\sim$1MeV and current of about few tens of kA the creation of reliable diagnostics for measuring the angular divergence of the beam electrons in the guiding magnetic field is very important. To solve this task we have elaborated and constructed a new angular detector based on the regularities of the transmission of magnetized electrons through cylindrical channels in absorbing material. The detector consists of few coaxial collectors with inner holes of different diameter, placed consequently. Simulations of the electron motion, reflection and absorption in the detector performed with code Geant4, showed good angular resolution of the detector $\sim$0.05 rad and the possibility to obtain the distribution function of the beam electrons on their initial pitch-angle. The results of measuring the angular divergence and angular distribution of the electrons in the magnetic field 0.6 T for the E-beam generated by the accelerator U-2 are discussed in the paper.
Primary author
Mr
Vasilii Stepanov
(Budker INP SB RAS)
Co-authors
Prof.
Andrey Arzhannikov
(Novosibirsk State University)
Mr
Denis Samtsov
(Budker INP SB RAS)
Maksim Makarov
(Budker INP SB RAS)
Dr
Stanislav Sinitsky
(Budker INP SB RAS)
