Abstract
An experiment, using the new detector Kedr, on the precise measurement of the τ-lepton mass is being readied on the VÉPP-4M. The resonance depolarization method is used for absolute calibration of the particle energy. The main difficulty in using a polarized beam at the τ-lepton production threshold (1777 MeV) is the closeness of an integral spin resonance (1763 MeV). Experiments observing the polarization of particles in VÉPP-4M after injection of the polarized beam from the VÉPP-3 storage booster with different detunings from resonance have been performed. For comparison, the depolarization time of a beam due to quantum fluctuations in the presence of characteristic disturbances of the guiding field is calculated. The temporal stability of the energy indications is studied.
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REFERENCES
V. V. Anashin et al., in: Proceedings of the 6th European Particle Accelerator Conference, EPAC-98, Stockholm (1998), Vol. 1, p. 400.
V. V. Anashin et al., Nucl. Instrum. Meth., A478, 420 (2002).
V. E. Blinov et al., in: Proc. PAC-2001, Vol. 5(5), p. 3317.
D. E. Groom et al., Euro. Phys. J., C15, No. 1–4 (2000).
A. A. Zholents et al., Phys. Lett., B96, 214 (1980).
Ya. S. Derbenev et al., Part. Accel., No. 8, 115 (1978).
V. E. Blinov et al., in: Proceedings of the 8th International Conference on Instrumentations for Colliding Beams, Novosibirsk, Russia, February 28–March 6, 2002.
S. A. Nikitin et al., Nucl Instrum. Meth., A216, 317 (1983).
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Blinov, V.E., Bogomyagkov, A.V., Gurov, D.S. et al. Start of the Experiment on the Absolute Calibration of Particle Energy in VÉPP-4M near the τ-Lepton Production Threshold. Atomic Energy 93, 945–949 (2002). https://doi.org/10.1023/A:1022929012990
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DOI: https://doi.org/10.1023/A:1022929012990