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TY - CONF AU - Leshenok, Leshenok D. AU - Bekhtenev, E.A. AU - Karpov, G.V. AU - Nikitin, S.A. AU - Plotnikova, O.A. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Observation of Saw-Tooth Effect Orbit in the VEPP-4 M Collider J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - We study the relative position of the electron and posi-tron closed orbits in the VEPP-4M single storage ring collider in experiments on orbit precision monitoring. A difference in the orbits can affect the accuracy of several fundamental experiments, e.g. precise comparison of the electron and positron spin frequencies (the CPT invari-ance test) [1]. In this case, the spin precession frequencies of particles should be compared within at least 5·10⁻⁹. The distinction of frequencies depends on the features of the radial orbits. Ideally, the difference in the electron and positron orbits is set only by distributed radiation losses of particle energy. The corresponding contribution to the total orbit distortions is called the Saw-Tooth effect orbit. Another example of possible precision experiment at VEPP-4M is search for the light speed anisotropy (LSA). In this case, it is necessary to ensure a stability of the difference in the radial orbits of electrons and positrons at a level of 1μm. PB - JACoW Publishing CP - Geneva, Switzerland SP - 5026 EP - 5028 KW - electron KW - positron KW - experiment KW - collider KW - storage-ring DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-FRXGBD4 UR - http://jacow.org/ipac2018/papers/frxgbd4.pdf ER -