Keyword: emittance
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WEPSB31 Project of Demonstration Center of the Proton Therapy at DLNP JINR proton, synchro-cyclotron, extraction, cyclotron 228
 
  • E. Syresin, G.A. Karamysheva, M.Y. Kazarinov, N.A. Morozov, G.V. Mytzin, N.G. Shakun
    JINR, Dubna, Moscow Region, Russia
  • J. Bokor
    STU, Bratislava, Slovak Republic
  
  JINR is one of the lead­ing pro­ton ther­apy re­search cen­ters of the in Rus­sia. The mod­ern tech­nique of 3D con­for­mal pro­ton ra­dio­ther­apy was first ef­fec­tu­ated in Rus­sia in this cen­ter, and now it is ef­fec­tively used in reg­u­lar treat­ment ses­sions. A spe­cial Medico-Tech­ni­cal Com­plex was cre­ated at JINR on the basis of the pha­sotron used for pro­ton treat­ment. About 100 pa­tients un­dergo a course of frac­tion­ated treat­ment here every year. Dur­ing last 14 years were treated by pro­ton beams about more than 1000 pa­tients . A pro­ject of the demon­stra­tion cen­ter of the pro­ton ther­apy is dis­cussed on base of a su­per­con­duct­ing 250 MeV syn­chro­cy­clotron. The su­per­con­duct­ing syn­chro­cy­clotron is planned to in­stall in­stead of pha­sotron in Med­ical Tech­ni­cal Com­plex of DLNP. The new trans­port chan­nel is de­signed for beam de­liv­ery to the JINR med­ical cabin.  
 
WEPSB33 Development of the Equipment for the Prototype of a Complex of Radiotherapy at the Nuclotron-M target, beam-transport, quadrupole, experiment 234
 
  • I.P. Yudin
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • S.I. Tyutyunnikov
    JINR, Dubna, Moscow Region, Russia
  
  The re­port deals with the con­struc­tion of the car­bon beam trans­port line for bio­med­ical re­search at the Nu­clotron ac­cel­er­a­tor com­plex, JINR, Dubna. We have stud­ied the scheme and modes of mag­neto-op­ti­cal el­e­ments of the chan­nel. Used elec­tron­ics de­scribed. We are dis­cussed the com­pi­la­tion and re­al­iza­tion of the plan of treat­ing a tumor lo­cated at a depth up to 30 cm. Choice of beam scan­ning schemes and their op­ti­miza­tion are shown.  
 
THPSC07 Single Frequency High Intensity High Energy Normal Conducting Hadron Linac DTL, linac, rfq, focusing 330
 
  • V.V. Paramonov, V.N. Leontiev
    RAS/INR, Moscow, Russia
  • A.P. Dourkine
    MNIRTI, Moscow, Russia
  • A. Kolomiets
    ITEP, Moscow, Russia
  
  Funding: Work is supported by IHEP with contract № 0348100096313000178
Tak­ing the care for beam qual­ity and the pos­si­bil­ity of prac­ti­cal re­al­iza­tion, the scheme and pa­ra­me­ters for 400 MeV H− linac are con­sid­ered. The con­cepts for beam emit­tance preser­va­tion, both trans­verse and lon­gi­tu­di­nal, start­ing from RFQ, fol­low­ing with PMQ fo­cus­ing DTL and fin­ish­ing with high en­ergy CCL part are sum­ma­rized. Dif­fer­ent fo­cus­ing schemes are an­a­lyzed for DTL and CCL parts. The pulse beam cur­rent is lim­ited to the safe value 40 mA and the av­er­age cur­rent up to 2 mA is sup­posed by duty fac­tor of 5%. The sin­gle op­er­at­ing fre­quency 352 MHz is for all linac parts, pro­vid­ing the strong uni­fi­ca­tion both for RF sys­tem and el­e­ments of ac­cel­er­at­ing struc­tures. Re­fer­ring and com­par­ing with ex­ist­ing so­lu­tions for an­other in­tense linacs, the fea­si­bil­ity and re­al­ity of the pro­posal is con­firmed. Ex­pected per­for­mances both in beam, pa­ra­me­ters and hard­ware are sum­ma­rized. 		 
 
THPSC10 Magnets of Injection and Extraction Systems of Cyclotron DC280 ion, cyclotron, sextupole, injection 339
 
  • N.Yu. Kazarinov, I.A. Ivanenko
    JINR, Dubna, Moscow Region, Russia
  
  The de­sign of two mag­nets of the cy­clotron DC280 is pre­sented. The mag­nets are the parts of in­jec­tion and ex­trac­tion sys­tems the cy­clotron. The de­sign is based on three-di­men­sional cal­cu­la­tion of the mag­net field car­ried out by using OPERA 3D pro­gram code. The in­flu­ence of the mag­netic fields non­lin­ear­i­ties on ion beam dy­nam­ics is an­a­lyzed.  
 
THPSC13 Horizontal Emittance Regulation at SIBERIA-2 injection, betatron, sextupole, quadrupole 347
 
  • A.G. Valentinov, V. Korchuganov, Y.V. Krylov, Y.L. Yupinov
    NRC, Moscow, Russia
  
  Syn­chro­tron ra­di­a­tion (SR) bright­ness is the most valu­able pa­ra­me­ter of every SR light source. It de­pends greatly on hor­i­zon­tal emit­tance of an elec­tron beam. That's why all mod­ern SR light sources have de­signed emit­tance of sev­eral nanome­ters. A hor­i­zon­tal emit­tance of Siberia-2 now equals to 98 nm. It can be de­creased by two ways. First way is to find an­other work­ing point (be­ta­tron tunes) with lower emit­tance. Max­i­mal pos­si­ble cur­rent val­ues of ex­ist­ing power sup­plies must be taken into ac­count. In­jec­tion ef­fi­ciency may be­come worse be­cause of smaller dy­namic aper­ture due to stronger sex­tupoles. Sec­ond way is to re­build mag­netic struc­ture keep­ing the same be­ta­tron tunes. Ad­van­tages of this method are good in­jec­tion ef­fi­ciency and proved en­ergy ramp­ing process. Mod­i­fi­ca­tion of the mag­netic struc­ture may be done at high en­ergy with more sta­ble elec­tron beam. But the sec­ond way is not al­lowed to reach as lower emit­tance level as in the first way. The­o­ret­i­cal and prac­ti­cal as­pects of these two ways are de­scribed in the re­port. Mag­netic struc­tures with dis­per­sion-free straight sec­tions and smooth hor­i­zon­tal dis­per­sion func­tion are pre­sented. Also struc­ture with higher emit­tance is de­scribed in order to reach higher in­jec­tion ef­fi­ciency.  
 
THPSC46 Simulation and Optimization of Ion Optical Extraction, Acceleration and H-minus Ion Beam Matching Systems ion, extraction, simulation, acceleration 429
 
  • B.A. Frolov
    IHEP, Moscow Region, Russia
  • V.S. Klenov, V.N. Mikhailov, O. Volodkevich
    RAS/INR, Moscow, Russia
  
  Source of neg­a­tive hy­dro­gen ions for the im­ple­men­ta­tion of mul­ti­turn charge-ex­change in­jec­tion to in­crease the in­ten­sity of IHEP buster is de­vel­oped. Sur­face-plasma ion source with Pen­ning dis­charge is se­lected as a source of H-mi­nus ions. A high-cur­rent ex­trac­tion sys­tem with down­stream elec­tron dump­ing has been de­signed. A three-di­men­sional ion op­ti­cal code IB­Simu has been uti­lized for mod­el­ling and op­ti­miza­tion the ex­trac­tion sys­tem and ion beam ac­cel­er­a­tion to en­ergy of 100 keV. A mag­netic low en­ergy beam trans­port line con­sist­ing of two so­le­noids has been de­signed to match the beam with RFQ. TRACE 2D code was used to op­ti­mize LEBT. A de­flect­ing mag­net with small an­gu­lar de­flec­tion (10) has been in­stalled be­tween so­le­noids to elim­i­nate for­ward trac­ing of neu­tral atoms from ions source to RFQ.