<xml>
  <records>
    <record>
       <contributors>
          <authors>
             <author>Shwartz, D.B.</author>
             <author>Anashin, V.V.</author>
             <author>Belikov, O.V.</author>
             <author>Berkaev, D.E.</author>
             <author>Gorchakov, K.</author>
             <author>Kasaev, A.S.</author>
             <author>Kirpotin, A.N.</author>
             <author>Koop, I.</author>
             <author>Krasnov, A.A.</author>
             <author>Kurkin, G.Y.</author>
             <author>Lysenko, A.P.</author>
             <author>Motygin, S.V.</author>
             <author>Perevedentsev, E.</author>
             <author>Prosvetov, V.P.</author>
             <author>Rabusov, D.V.</author>
             <author>Rogovsky, Yu. A.</author>
             <author>Semenov, A.M.</author>
             <author>Senchenko, A.I.</author>
             <author>Shatilov, D.N.</author>
             <author>Shatunov, P.Yu.</author>
             <author>Shatunov, Y.M.</author>
             <author>Shubina, O.S.</author>
             <author>Timoshenko, M.V.</author>
             <author>Zemlyansky, I.M.</author>
             <author>Zharinov, Yu.M.</author>
          </authors>
       </contributors>
       <titles>
          <title>
             Round Colliding Beams at Vepp-2000 with Extreme Tuneshifts
          </title>
       </titles>
		 <publisher>JACoW Publishing</publisher>
       <pub-location>Geneva, Switzerland</pub-location>
		 <isbn>978-3-95450-216-5</isbn>
		 <electronic-resource-num>10.18429/JACoW-eeFACT2018-MOYBA01</electronic-resource-num>
		 <language>English</language>
		 <pages>34-40</pages>
       <pages>MOYBA01</pages>
       <keywords>
          <keyword>luminosity</keyword>
          <keyword>collider</keyword>
          <keyword>positron</keyword>
          <keyword>electron</keyword>
          <keyword>emittance</keyword>
       </keywords>
       <work-type>Contribution to a conference proceedings</work-type>
       <dates>
          <year>2019</year>
          <pub-dates>
             <date>2019-04</date>
          </pub-dates>
       </dates>
       <urls>
          <related-urls>
              <url>https://doi.org/10.18429/JACoW-eeFACT2018-MOYBA01</url>
              <url>http://jacow.org/eefact2018/papers/moyba01.pdf</url>
          </related-urls>
       </urls>
       <abstract>
          VEPP-2000 is the only electron-positron collider operating with round beams that allow to enhance beam-beam limit. VEPP-2000 with SND and CMD-3 detectors carried out two successful data-taking runs after new BINP injection complex was commissioned. The 2016/2017 run was dedicated to high energy range (640-1000 MeV per beam) while the 2017/2018 run was focused at 275-600 MeV/beam energies. With sufficient positron production rate and upgraded full-energy booster the collider luminosity was limited by beam-beam effects, namely flip-flop effect. Thorough machine tuning together with new ideas introduced to suppress flip-flop allowed to achieve high beam-beam tuneshift and bunch-by-bunch luminosity values at specific beam energies. The achieved luminosity increased 2-5 times in a whole energy range in comparison to phase-1 operation (2010-2013).
       </abstract>
    </record>
  </records>
</xml>
