VEPP-4

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Accelerator complex VEPP-4 with pre-accelerators and main ring VEPP-4M with the KEDR detector.
Deflection magnets in an arc segment of the Electron-Positron-Collider VEPP-4M.

The VEPP-4 ( Russian ВЭПП-4 ) is a particle accelerator complex operated since 1979 at the Budker Institute for Nuclear Physics in Novosibirsk , Russia. By means of several pre-accelerators and the main storage ring VEPP-4M, with a circumference of 366 m, electrons and positrons are accelerated to energies of up to 6  GeV and brought to collision.

The pre-accelerator chain consists of a 50 MeV electron linear accelerator for the generation of positrons and a subsequent booster - synchrotron , which accelerates electrons and positrons to 350 MeV, which are then fed into the first storage ring VEPP-3 and accumulated in particle bunches. The VEPP-3 has a circumference of 74.4 m and brings the particle bunches up to 2 GeV. These can be fed into the main ring VEPP-4M, further accelerated up to 6 GeV and brought to a collision in the KEDR particle detector , but are also available for experiments on the VEPP-3.

With the electron-positron-collider VEPP4-M, the masses of some mesons and the τ-lepton have been determined with high precision in the field of high-energy physics . The main ring and its pre-accelerator VEPP-3 are also used to generate synchrotron radiation for materials and life sciences . The ROKK-1M facility is also located on the main ring for generating high-energy gamma radiation through backscattering ( inverse Compton scattering ) of laser radiation from the circulating electrons and positrons. It can photons are energies as up to 1.6 GeV reached at approximately 10 6 photons per second. Analyzes will thus, inter alia, the high-energy Delbrück scattering and it could for the first time the experimental photon cleavage (photon splitting) at the electric field of an atomic nucleus are detected.

Web links

Individual evidence

  1. ^ J. Beringer et al .: High-energy collider parameters. (PDF; 90 kB) In: REVIEW OF PARTICLE PHYSICS (Phys. Rev. D). Vol. 86, No. 1, 010001, 2012, pp. 317-321, doi : 10.1103 / PhysRevD.86.010001 .
  2. ↑ A. Bogomyagkov, S. Karnaev et al .: Automation of Operations on the VEPP-4 Control System. (PDF; 276 kB) In: 10th ICALEPCS Int. Conf. on Accelerator & Large Expt. Physics Control Systems. Geneva, Switzerland, April 10-14 October 2005, PO1.072-7.
  3. ↑ V. Smaluk: STATUS OF VEPP-4M COLLIDER AT BINP. (PDF; 302 kB) In: Proc. of RuPAC 2008. Zvenigorod , Russia, September 28 to October 3, 2008, pp. 79-81.
  4. ^ The VEPP-4 accelerating-storage complex. ( Memento from July 16, 2011 in the Internet Archive ) Budker Institute of Nuclear Physics.
  5. ↑ V. Anachin et al .: VEPP-4M collider: Status and Plans. (PDF; 244 kB) In: Proc. of EPAC-1998. Stockholm, Sweden, April 22-26 June 1998, pp. 400-402.
  6. ↑ Sh. Zh. Akhmadaliev et al .: Experimental Investigation of High-Energy Photon Splitting in Atomic Fields. (PDF; 173 kB) In: Phys. Rev. Lett. Vol. 89, No. 6, 2002, 061802, doi : 10.1103 / PhysRevLett.89.061802 .