Author: Levichev, E.B.
Paper Title Page
MOPEA053 Status of NSLS-II Booster 196
 
  • S.M. Gurov, A.I. Erokhin, S.E. Karnaev, V.A. Kiselev, E.B. Levichev, A. Polyansky, A.M. Semenov, S.V. Shiyankov, S.V. Sinyatkin, V.V. Smaluk
    BINP SB RAS, Novosibirsk, Russia
  • H.-C. Hseuh, T.V. Shaftan
    BNL, Upton, Long Island, New York, USA
  
  The Na­tional Syn­chro­tron Light Source II is a third gen­er­a­tion light source under con­struc­tion at Brookhaven Na­tional Lab­o­ra­tory. The pro­ject in­cludes a highly op­ti­mized 3 GeV elec­tron stor­age ring, linac pre-in­jec­tor and full-en­ergy in­jec­tor-syn­chro­tron. Bud­ker In­sti­tute of Nu­clear Physics build booster for NSLS-II. The booster should ac­cel­er­ate the elec­tron beam con­tin­u­ously and re­li­ably from a min­i­mum 170 MeV in­jec­tion en­ergy to a max­i­mum en­ergy of 3.15 GeV and av­er­age beam cur­rent of 20 mA. The booster shall be ca­pa­ble of multi-bunch and sin­gle bunch op­er­a­tion. Pre-comis­sion­ing test re­sults of booster com­po­nents and sys­tem are re­viewed.  
 
TUPME028 RF Orbit Separation for CPT-Test Experiment at VEPP-4M 1634
 
  • V.E. Blinov, E.A. Bekhtenev, G.V. Karpov, V.A. Kiselev, S.A. Krutikhin, G.Y. Kurkin, E.B. Levichev, O.I. Meshkov, S.I. Mishnev, V.V. Neyfeld, S.A. Nikitin, I.B. Nikolaev, D.N. Shatilov, G.M. Tumaikin
    BINP SB RAS, Novosibirsk, Russia
  • A.P. Chabanov, O.P. Gordeev, A.I. Mickailov
    Budker INP & NSU, Novosibirsk, Russia
  
  Funding: This work was supported by the Ministry of Education and Science of the Russian federation and the Russian Foundation for Basis Research (grant 11-02-01422-a)
In a spe­cial pro­gram of ex­per­i­ments which is under de­vel­op­ment in a back­ground regime at the VEPP-4M stor­age ring we set an aim to re­al­ize a po­ten­tial pos­si­bil­ity to make the CPT in­vari­ance test with the ac­cu­racy bet­ter than 10-8. The test will be based on a pre­cise com­par­i­son of the spin pre­ces­sion fre­quen­cies of si­mul­ta­ne­ously stored elec­trons and positrons. To ex­clude the pres­ence of sta­tic elec­tric fields in­creas­ing a sys­tem­atic error we have de­vel­oped and tested a spe­cial RF sys­tem dri­ven at the half rev­o­lu­tion fre­quency to sub­si­tute for the elec­tro­sta­tic orbit sep­a­ra­tion sys­tem. The lat­ter is needed for the elec­tron and positron orbit sep­a­ra­tion at the par­a­sitic in­ter­ac­tion point where the beam-beam ef­fects dras­ti­cally cut the beam cur­rents. 		 
 
WEPEA049 Analysis of the Non-linear Fringe Effects of Large Aperture Triplets for the HL LHC Project 2615
 
  • A.V. Bogomyagkov, E.B. Levichev, P.A. Piminov
    BINP SB RAS, Novosibirsk, Russia
  • A. Chancé, B. Dalena, J. Payet
    CEA/IRFU, Gif-sur-Yvette, France
  • R. De Maria, S.D. Fartoukh, M. Giovannozzi
    CERN, Geneva, Switzerland
  
  Funding: The HiLumi LHC Design Study is included in the HL-LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
The HL-LHC pro­ject re­lies on large aper­ture quadrupoles which are com­pat­i­ble with the very large beam sizes in the inner triplets re­sult­ing from the strong re­duc­tion of β*. As a re­sult the beam is much more sen­si­tive to non-lin­ear per­tur­ba­tions in this re­gion, such as those in­duced by the fringe fields of the low-beta quadrupoles. The spa­tial ex­ten­sion of these fringe fields in­creases as well more or less lin­early with the coil aper­ture, which is an ad­di­tional mo­ti­va­tion to analyse this as­pect in de­tail in the frame­work of the High Lu­mi­nos­ity LHC de­sign study. This paper will quan­tify this ef­fect both by di­rect an­a­lyt­i­cal es­ti­mates using first order Hamil­ton­ian per­tur­ba­tion the­ory, and via nu­mer­i­cal stud­ies thanks to the ded­i­cated im­ple­men­ta­tion of a fringe field sym­plec­tic in­te­gra­tor in Six­Track. 		 
 
THPME029 Design of NSLS-II Booster Dipoles with Combined-function Magnetic Field 3570
 
  • S.V. Sinyatkin, A.N. Dubrovin, S.M. Gurov, E.B. Levichev, Yu.A. Pupkov, E.R. Rouvinsky, A.V. Sukhanov
    BINP SB RAS, Novosibirsk, Russia
  
  Fo­cus­ing and de­fo­cus­ing dipoles mag­nets of NSLS-II 3 GeV booster are de­signed, man­u­fac­tured and mea­sured in BINP, Rus­sia. The mag­nets should pro­vide the booster op­er­a­tion at en­ergy from 170 MeV to 3.15 GeV with a 2 Hz fre­quency. Be­cause of booster com­pact­ness the dipoles have quadru­pole and sex­tu­pole com­po­nents and should cre­ate high qual­ity of field of ± 2·10-4 in re­gion of ± 2 cm. In this paper the de­sign and re­sults of 2D and 3D sim­u­la­tion are pre­sented.  
 
THPME030 Magnetic Measurement Results of the NSLS-II Booster Dipole Magnets 3573
 
  • S.V. Sinyatkin, G.N. Baranov, A.M. Batrakov, P.N. Burdin, D.B. Burenkov, S.M. Gurov, V.A. Kiselev, V.V. Kobets, E.B. Levichev, I.N. Okunev, A. Polyansky, Yu.A. Pupkov, L.E. Serdakov, P. Vobly
    BINP SB RAS, Novosibirsk, Russia
  
  Fo­cus­ing and de­fo­cus­ing di­pole mag­nets for NSLS-II 3 GeV booster are de­signed, man­u­fac­tured and mea­sured in BINP, Rus­sia. Mag­netic mea­sure­ments of 32 BD and 28 BF mag­nets are made by BINP. In this paper the re­sults of mag­netic mea­sure­ments of dipoles mag­nets in the field area of 0.638 – 11.829 kGs for BD type and 0.260 - 4.829 kGs for BF type are given. Analy­sis and com­par­i­son with mag­netic field sim­u­la­tion are made.