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Poster session: High intensity cyclic and linear accelerators

P.62. T.A.Yaskina, S.M.Gurov (Budker Institute of Nuclear Physics, Novosibirsk, Russia) Positron beams in VEPP-5 injection complex linear accelerator

Injection complex VEPP-5 which is currently under construction at BINP is designed to provide BINP VEPP-4 and VEPP-2000 colliders with intense electron and positron beams. Positrons are generated by 300 MeV electron beam incident on Ta target. In order to optimize the beam transport through the downstream linac the code that simulates dy- namics of positrons in real linac fields was developed. Recent experimental and computer simulation results are presented. Positrons number of 6*108 in a single bunch is achieved that corresponds to positron yield of 0.1 1/GeV.

Tatiana Alexandrovna Yaskina: t.a.yaskina@gmail.com

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    63. O.Belyaev, Yu.Budanov, I.Zvonarev, A.Maltsev, E.Mazurov, V.Stepanov,

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      Strekalovskyh, V.Teplyakov, N.Turin (State Research Centre of Russia Institute for High Energy Physics, Protvino, Russia) Status of Linac URAL-30M - Novel Injector to Accelerator Complex of IHEP

The URAL-30 proton linac was commissioned in 1977. It applies a through front-to-end RFQ-focusing up to the top energy of 30 MeV. Since 1985 till now, this facility operates as an injector to IHEP booster. A-few-year-long scientific research efforts and computer simulations allowed to launch design of a novel, upgraded machine. This accelerator, URAL-30M is currently being manufactured in IHEP. Accelerating rate in URAL-30M is greater then in old injector, in RFQ by means of electrode's shape and in RFQ-DTL (RFQ Drift Tube Linac) by means of increasing voltage in accelerating gaps. For the time being, a conventional RFQ and three of four RFQ-DTL sections (up to 22 MeV) are assembled and subjected to pre-commissioning tests. Fourth is being tuned. In this machine, meas- ures are foreseen to facilitate a better section-to-section matching of beam. New injector exhibits a higher shunt impedance and enable much an easier assembly of the electrodes. Preliminary testing of the first two RFQ-DTL sections of URAL-30M indicates that emit- tance growth is now significantly lower, as compared to its predecessor. All the more, URAL-30M has a shorter length of 23.4 m.

Dr. Yury Budanov: Budanov51@mail.ru

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