Keyword: simulation
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TUPSA06 Beam Dynamics Calculation in the Induction Linear Accelerator cathode, solenoid, acceleration, electron 48
 
  • E.A. Savin
    MEPhI, Moscow, Russia
  • A.A. Zavadtsev
    Nano, Moscow, Russia
  
  The geom­e­try of the in­duc­tion elec­tron ac­cel­er­a­tor, which will be used for high cur­rent ac­cel­er­a­tion, has been cal­cu­lated. For the dif­fer­ent cur­rents val­ues the op­ti­mum fo­cus­ing mag­netic field and has been ob­tained. Also a cur­rent in the com­pen­sative coil near the cath­ode has been cal­cu­lated. The cath­ode elec­trode geom­e­try was chang­ing to achieve min­i­mum beam os­cil­la­tions dur­ing the ac­cel­er­a­tion.  
 
TUPSA07 Transit Code for Beam Dynamic Simulation linac, rfq, ion, proton 51
 
  • A.S. Plastun, A. Kolomiets, T. Tretyakova
    ITEP, Moscow, Russia
  
  Mul­ti­par­ti­cle com­puter code TRAN­SIT for sim­u­la­tion of in­tense ion beams in linacs and trans­port sys­tems is pre­sented. The code is based on ex­pe­ri­ence in de­sign of ion linacs in ITEP. TRAN­SIT sum­ma­rizes the most ac­tual and mod­ern meth­ods and al­go­rithms for in­te­gra­tion of mo­tion equa­tions in­clud­ing space charge forces. It is being used in ITEP for de­sign and sim­u­la­tion of con­ven­tional RFQs, spa­tially pe­ri­odic RF fo­cus­ing linacs, beam trans­port sys­tems, RF de­flec­tors, etc. The paper pre­sents gen­eral de­scrip­tion of TRAN­SIT code and some achieved re­sults.  
 
TUPSA10 Advanced Optimization of an Low-energy Ion Beam Dynamics at Linac Front-end with RF Focusing linac, focusing, rfq, acceleration 57
 
  • V.S. Dyubkov
    MEPhI, Moscow, Russia
  
  A de­sign and de­vel­op­ment of a linac front-end, that guar­anties the re­quired beam, qual­ity is an issue of the day. A linac with RF fo­cus­ing by means of the ac­cel­er­at­ing field spa­tial har­mon­ics is sug­gested as an al­ter­na­tive to RFQ sys­tem. Sim­u­la­tion re­sults of the low-en­ergy pro­ton beam dy­nam­ics at linac, that takes into ac­count main linac pa­ra­me­ter op­ti­miza­tion, based on ad­vanced dy­nam­i­cal ac­cep­tance cal­cu­la­tion, are pre­sented and dis­cussed.  
 
TUPSA12 The User Friendly Interface for BEAMDULAC-RFQ Code rfq, interface, linac, space-charge 60
 
  • S.M. Polozov, P.O. Larin
    MEPhI, Moscow, Russia
  
  The BEAM­DU­LAC* beam dy­nam­ics sim­u­la­tion code is under de­vel­op­ment at MEPhI De­part­ment of Elec­tro­phys­i­cal Fa­cil­i­ties since 1999. Such code in­cludes ver­sions for beam dy­nam­ics sim­u­la­tion in a num­ber of ac­cel­er­at­ing struc­tures as RFQ, DTL, APF, trans­port chan­nels, ets. The mo­tion equa­tion for each par­ti­cle is solved self­con­sis­tently in the ex­ter­nal fields and the in­ter-par­ti­cle Coulomb field si­mul­ta­ne­ously. The BEAM­DU­LAC code uti­lizes the cloud-in-cell (CIC) method for ac­cu­rate treat­ment of the space charge ef­fects. The ex­ter­nal field can be rep­re­sented an­a­lyt­i­cally, as a se­ries or on the grid. The ab­sence of user friendly in­ter­face was the main dis­ad­van­tage of the code. Last year such in­ter­face was de­vel­oped and will pre­sent in the re­port.
* S.M. Polozov. Problems of Atomic Science and Technology. Series: Nuclear Physics Investigations, 3 (79), 2012, p. 131-136. 		 
 
TUPSA17 Axial Injection to a Compact Cyclotron with High Magnetic Field cyclotron, injection, ion, ion-source 75
 
  • V.L. Smirnov, S.B. Vorozhtsov
    JINR/DLNP, Dubna, Moscow region, Russia
  
  One of ad­van­tages of a com­pact cy­clotron over other type ac­cel­er­a­tors is a small size mainly de­fined by the fa­cil­ity’s bend­ing mag­netic field. In such cy­clotrons an ap­pli­ca­tion of an ex­ter­nal in­jec­tion is re­quired in some cases. But for high mag­netic field of the cy­clotrons (over 4-5 T) there ap­pears a se­vere prob­lem to make the 1st turns in the ma­chine with ex­ter­nal in­jec­tion of ac­cel­er­ated par­ti­cles. This paper de­scribes a pro­posal of a new cen­tral re­gion struc­ture of a com­pact cy­clotron that per­mits one to suc­cess­fully solve the prob­lem of the axial in­jec­tion into such a fa­cil­ity using a spi­ral in­flec­tor.  
 
TUPSA20 Output Energy Variation in the SC Linac for the Proton Radiotherapy linac, proton, cavity, focusing 80
 
  • I.A. Ashanin, S.M. Polozov, A.V. Samoshin
    MEPhI, Moscow, Russia
  
  Cur­rent suc­cess of the su­per­con­duct­ing lin­ear ac­cel­er­a­tors based on in­de­pen­dently phased SC cav­i­ties gives a se­ri­ously rea­son to con­sider such struc­ture in pro­ton ra­dio­ther­apy. Su­per­con­duc­tiv­ity allow to solve at once some prob­lems con­cerned with a low rate of en­ergy gain, high length, higher ca­pac­ity losses and higher cost of the pro­ton lin­ear ac­cel­er­a­tor sub­se­quently. One of the tra­di­tional aims of such fa­cil­i­ties is re­ceiv­ing of the beam en­ergy about 240 MeV with pos­si­bil­ity of flu­ently reg­u­la­tion in range from 150 to 240 MeV that re­sponds to ir­ra­di­ate the tu­mors lo­cated at dif­fer­ent depth. The pos­si­bil­ity of beam en­ergy vari­a­tion by means of RF field phase in last res­onators and num­ber of the res­onator turn-off be­comes the major ad­van­tage of the pro­ton SC linac. The op­ti­mal choice of ac­cel­er­a­tor pa­ra­me­ters and the beam dy­nam­ics sim­u­la­tion re­sults with using BEAM­DU­LAC-SCL code will pre­sented*. Meth­ods of the out­put en­ergy vari­a­tion with beam qual­ity preser­va­tion in the pro­ton SC linac will dis­cussed.
* A.V. Samoshin. Proc. of LINAC2012, Tel-Aviv, Israel, TUPB069, p. 630 - 632 		 
 
TUPSA35 Virtual Laboratory of Vacuum Technique vacuum, software, interface, operation 110
 
  • G.P. Averyanov, V.V. Dmitriyeva, V.L. Shatokhin
    MEPhI, Moscow, Russia
  
  The re­port con­sid­ers the in­ter­ac­tive com­puter mod­el­ing of vac­uum sys­tems. Op­er­a­tion of real vac­uum in­stal­la­tions is mod­eled by sim­u­lat­ing com­puter code. It be­comes pos­si­ble in a short time (with the as­sess­ment of real-time) to pass through full cycle of the tech­nolo­gies to reach high vac­uum state and to es­ti­mate the nec­es­sary time. It is pos­si­ble to as­sem­ble vir­tual in­stal­la­tion, to choose the nec­es­sary pumps (from the data­base of low-vac­uum and high-vac­uum ones), to se­lect the vac­uum con­nect­ing pipes with the re­quired pa­ra­me­ters. The vac­uum cham­ber vol­ume and its in­ter­nal sur­faces char­ac­ter­is­tics (rough­ness, types of pre­lim­i­nary pro­cess­ing), defin­ing out­gassing from these sur­faces are set. Pos­si­ble leak­age in junc­tion places of the in­di­vid­ual el­e­ments of the sys­tem could be taken into con­sid­er­a­tion. After pump­ing start, se­quen­tial switch­ing on of dif­fer­ent pumps and achieve­ment of a cer­tain pres­sure, pos­si­bil­ity of cham­ber pre­heat­ing up to the nec­es­sary tem­per­a­ture is pro­vided. Dur­ing the analy­sis of pro­ce­dure of pump­ing op­ti­miza­tion of the struc­ture of sys­tem and the se­lected el­e­ments is made. The com­puter lab­o­ra­tory is a part of tra­di­tional lab­o­ra­tory of vac­uum tech­nique of the De­part­ment of Elec­tro­phys­i­cal Fa­cil­i­ties of NRNU MEPhI. Mod­el­ing of vac­uum sys­tems sig­nif­i­cantly ex­pands the func­tional ca­pa­bil­i­ties of this lab­o­ra­tory.  
 
WEPSB01 Modernization the Modulator of the RF-Generator Ion Linear Accelerator LU-20 ion, operation, linac, high-voltage 155
 
  • V. Kobets, A. Govorov, V. Monchinsky
    JINR, Dubna, Moscow Region, Russia
  • A.V. Butenko, D.E. Donets, A.O. Sidorin
    JINR/VBLHEP, Moscow, Russia
  
  The re­port dis­cusses the re­place­ment of the lamp key the mod­u­la­tor semi­con­duc­tor. A schematic of the mod­u­la­tor and a semi­con­duc­tor switch scheme pro­tec­tion against volt­age surges in the gen­er­a­tor lamp. Re­plac­ing the lamp key it pos­si­ble to in­crease the out­put power gen­er­a­tor.  
 
WEPSB06 The Optimization of the Buncher at 145.2 MHz to Reduce Multipactor Effect cavity, electron, injection, beam-transport 166
 
  • M. Gusarova, T. Kulevoy, I.I. Petrushina, A.S. Plastun, S.M. Polozov
    MEPhI, Moscow, Russia
  • T. Kulevoy, A.S. Plastun
    ITEP, Moscow, Russia
  
  The re­sults of the op­ti­miza­tion of the cav­ity of the sin­gle gap buncher at 145.2 MHz to re­duce mul­ti­pact­ing ef­fect are pre­sented. Res­o­nant volt­ages, im­pact en­er­gies and cor­re­spond­ing par­ti­cle tra­jec­to­ries are ob­tained. The vari­ants of de­sign to re­duce mul­ti­pact­ing ef­fect are con­sid­ered.  
 
WEPSB07 MultP-M Code Geometry Import Module Performance Optimization multipactoring, interface, operation, electron 169
 
  • M. Gusarova, S. Khudyakov, M.V. Lalayan
    MEPhI, Moscow, Russia
  
  The new pos­si­bil­i­ties of three-di­men­sional mod­el­ing pro­gram mul­ti­pactor MultP-M are pre­sented. On an ex­am­ple, con­sider an in­crease in the speed and ac­cu­racy of the cal­cu­la­tion using a new al­go­rithm for cal­cu­lat­ing the use of load­ing geom­e­try for­mat STL.  
 
WEPSB26 Study of Possibility of Industrial Application of Ion Injector I-3 ion, target, laser, ion-source 217
 
  • P.N. Alekseev
    ITEP, Moscow, Russia
  
  Ions in­jec­tor I-3 of the ITEP-TWAC ac­cel­er­a­tor com­plex con­sists of a buncher, two-gap ac­cel­er­at­ing cav­ity and a beam trans­port line. Laser ion source is used to gen­er­ate ions for the in­jec­tor. Pos­si­bil­ity of ap­pli­ca­tion of the in­jec­tor to dope semi­con­duc­tor ma­te­ri­als with vari­able en­ergy ions is con­sid­ered. Re­sults of beam pa­ra­me­ters op­ti­miza­tion by nu­mer­i­cal sim­u­la­tion to pro­duce uni­form dis­tri­b­u­tion of par­ti­cles den­sity and re­quired en­ergy spread on the tar­get are pre­sented.  
 
WEPSB27 Design of Multifunctional Facility Based on ECR Ion Source for Material Science ion, experiment, target, ECR 220
 
  • A.V. Ziiatdinova, T. Kulevoy
    MEPhI, Moscow, Russia
  • S.L. Andrianov, B.B. Chalykh, G. Kropachev, R.P. Kuibeda, T. Kulevoy, A.V. Ziiatdinova
    ITEP, Moscow, Russia
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  
  The tra­di­tional ex­per­i­men­tal method for new ma­te­ri­als ra­di­a­tion re­sis­tance in­ves­ti­ga­tion is a re­ac­tor ir­ra­di­a­tion. How­ever, there are some dif­fi­cul­ties dur­ing steel ex­po­sure in re­ac­tor. Sim­u­la­tion method based on ion ir­ra­di­a­tion al­lows ac­cel­er­at­ing the de­fect gen­er­a­tion in the ma­te­r­ial under in­ves­ti­ga­tion. Also a mod­i­fi­ca­tion of ma­te­ri­als by ion beams rep­re­sents the great prac­ti­cal in­ter­est for mod­ern ma­te­r­ial sci­ence. Ex­per­i­ments in both di­rec­tions are on­go­ing in ITEP. The paper pre­sents the de­sign of the test-bench based on ECR ion source and elec­tro­sta­tic ac­cel­er­a­tion which is under de­vel­op­ment in ITEP. This paper de­scribes the re­sults of beam dy­nam­ics sim­u­la­tion in the trans­port chan­nels of the test-bench. Sim­u­la­tion was car­ried out in the "real" fields Con­tin­u­ous ion beam achiev­able at the test-bench en­ables beam flu­ence on the tar­get up to 1016 par­ti­cles/m2.  
 
WEPSB35 Thermal Simulations of the Biperiodical Accelerating Structure with the Operating Frequency 27 GHz coupling, linac, electron, medical-accelerators 237
 
  • Yu.D. Kliuchevskaia, S.M. Polozov
    MEPhI, Moscow, Russia
  
  Biperi­od­i­cal ac­cel­er­at­ing struc­ture (BAS) rep­re­sents an ac­cel­er­at­ing struc­ture based on disk loaded wave­guide (DLW) with π/2 op­er­a­tion mode. The 1 cm band struc­ture will have very com­pact trans­verse size. Such char­ac­ter­is­tics give it per­spec­tive to use in med­ical ac­cel­er­a­tors. The re­sults of beam dy­nam­ics sim­u­la­tion and elec­tro­dy­nam­ics study was dis­cussed early. It will im­por­tant to study the BAS elec­tro­dy­nam­ics tak­ing into ac­count ther­mal processes in struc­ture and to de­sign the cool­ing sys­tem. It is im­por­tant be­cause of the high pulse RF power (about 1.5 MW) nec­es­sary for the beam ac­cel­er­a­tion. The sim­u­la­tion re­sults which are de­fined using CST code will pre­sented in re­port. Cal­cu­la­tion and de­ter­mi­na­tion of the ther­mol­y­sis co­ef­fi­cient de­pend­ing on speed, tem­per­a­ture and the water flow di­rec­tion will make.  
 
WEPSB36 A prototype of a Phased Array for Deep Thermoradiotherapy dipole, impedance, experiment, radiation 240
 
  • A.M. Fadeev, A.A. Blinnikov, S.M. Ivanov, S.M. Polozov
    MEPhI, Moscow, Russia
  
  It is proven that hy­per­ther­mia in­creases ra­di­a­tion and chemother­apy ef­fi­ciency. In on­col­ogy, the gen­er­a­tion of a higher tem­per­a­ture at a tu­mor-in­volved re­gion of the body is called hy­per­ther­mia. The ther­mora­dio­ther­apy is widely and ef­fec­tive uses. A phased array of eight dipoles for the hy­per­ther­mia treat­ment of deep-seated tu­mors is pro­posed ear­lier. The power and phase co­her­ently de­liv­ered to the ra­di­at­ing el­e­ments can be var­ied, so that the elec­tro­mag­netic field is in­creased at the tumor lo­ca­tion and de­creased in the nor­mal tis­sues. The pro­to­type of the phased array of two dipoles and the RF power scheme are pre­sented and re­sults of ex­per­i­ments are dis­cussed. Mea­sured and sim­u­lated tem­per­a­ture dis­tri­b­u­tions along the line con­nect­ing two dipoles are dis­cussed in this paper.  
 
WEPSB38 Multifunctional Extraction Channel Development Heavy Ion RFQ (Radio Frequency Quadrupole) target, ion, plasma, rfq 245
 
  • E. Khabibullina, T. Kulevoy
    MEPhI, Moscow, Russia
  • B.B. Chalykh, R. Gavrilin, A. Golubev, G. Kropachev, R.P. Kuibeda, T. Kulevoy, S.A. Visotski
    ITEP, Moscow, Russia
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  
  In the ITEP the Heavy Ion RFQ HIP-1 (Heavy Ion Pro­to­type) pro­vides ion beams for two dif­fer­ent ex­per­i­men­tal pro­grams. The first one is suc­cess­fully on­go­ing and it is aimed to ir­ra­di­a­tion re­sis­tance in­ves­ti­ga­tion of re­ac­tor con­struc­tion ma­te­ri­als. Sam­ples of new ma­te­ri­als for re­ac­tors are ir­ra­di­ated by beams of iron, vana­dium ions ac­cel­er­ated by the linac. The struc­ture changes are in­ves­ti­gated by both trans­mis­sion elec­tron mi­cro­scope and atom-probe to­mog­ra­phy. The sec­ond one is under de­vel­op­ment and it is aimed to in­ves­ti­gate ion beam in­ter­ac­tion with plasma and metal vapor tar­gets. On the basis of beam dy­nam­ics sim­u­la­tion the de­sign of new RFQ-out­put line for both ex­per­i­ments re­al­iza­tion was de­vel­oped. De­tails of beam dy­nam­ics sim­u­la­tion and out­put line de­sign are pre­sented and dis­cussed in this paper.  
 
WEPSB42 Histogram Based Bremsstrahlung Radiation Source Model for the CyberKnife Medical Linear Accelerator radiation, photon, electron, factory 256
 
  • A.V. Dalechina, A.I. Ksenofontov
    NRNU, Moscow, Russia
  • G.E. Gorlachev
    N.N. Burdenko Neurosurgical Institute, Moscow, Russia
  
  The ac­cu­racy of dose cal­cu­la­tions is of fun­da­men­tal im­por­tance in treat­ment plan­ning of ra­di­a­tion ther­apy. The dose dis­tri­b­u­tions must be cal­cu­lated and ver­i­fied by an ac­cu­rate al­go­rithm. The Monte Carlo sim­u­la­tion (sta­tis­ti­cal method, based on ran­dom sam­pling) of ra­di­a­tion trans­port is the only method that makes it pos­si­ble to per­form high-pre­ci­sion dose cal­cu­la­tions in the case of a com­plex geom­e­try. The main bot­tle­neck for the ap­pli­ca­tion of this method in prac­ti­cal plan­ning of ra­di­a­tion ther­apy is the lack of a gen­eral vir­tual source model of the ac­cel­er­a­tor ra­di­a­tion source. There are sev­eral ap­proaches that have been de­scribed in the lit­er­a­ture*. The goal of this work is to build a source model, based on his­togram dis­tri­b­u­tions, to rep­re­sent the 6 MV pho­ton beams from the Cy­berknife stereo­tac­tic ra­dio­surgery sys­tem** for Monte Carlo treat­ment plan­ning dose cal­cu­la­tions. The trans­port of par­ti­cles in treat­ment head of Cy­berknife was sim­u­lated. En­ergy, ra­dial and an­gu­lar dis­tri­b­u­tions were cal­cu­lated. Source model was cre­ated on the base of the cu­mu­la­tive his­tograms. This ap­proach pro­vides pro­duc­ing an un­lim­ited num­ber of par­ti­cles for the next dosi­met­ric plan­ning. Re­sults of source mod­el­ling were ver­i­fied in com­par­i­son with full-scale sim­u­la­tion with­out model. Good agree­ment was shown with cal­cu­la­tions using the source model of the lin­ear ac­cel­er­a­tor treat­ment head.
*Chetty I.J. et al. Report of the AAPM Task Group No. 105// Med. Phys. 2007.
**Francescon P., Cora S., Cavedon C. Total scatter factors of small beams // Med. Phys. 2008.
 		 
 
THX02 Experience in Research, Development, Construction and Commissioning of Normally Conducting Accelerating Structures linac, coupling, HOM, cavity 278
 
  • V.V. Paramonov, L.V. Kravchuk
    RAS/INR, Moscow, Russia
  
  The ex­pe­ri­ence and re­sults of re­search, de­vel­op­ment, con­struc­tion and start of nor­mally con­duct­ing ac­cel­er­at­ing struc­tures for high in­ten­sity hadron lin­ear ac­cel­er­a­tors at medium and high en­ergii is sum­ma­rized Cre­ated meth­ods and ob­tained re­sults pro­vided con­struc­tion and start of op­er­a­tion of ac­cel­er­at­ing sys­tem in INR H− linac with de­signed en­ergy 600 MeV. The re­search re­sults allow gen­er­al­ize the prop­er­ties of high en­ergy struc­tures and de­velop meth­ods and cri­te­ria for im­prove­ments, with were re­al­ized in the de­vel­op­ment and com­mis­sion­ing of ac­cel­er­at­ing struc­tures in an­other for­eign lab­o­ra­to­ries. Bas­ing on re­search re­sults, the high en­ergy ac­cel­er­at­ing struc­ture, which sur­passes ana­logues in the total list of pa­ra­me­ters, is pro­posed and ap­proved.  
slides icon Slides THX02 [1.259 MB]  
 
THCE01 INR RAS Linac Proton Injector 100 Hz PRR Operation Mode operation, proton, high-voltage, linac 306
 
  • A. Belov, O.T. Frolov, L.P. Nechaeva, E.S. Nikulin, A.V. Turbabin, V. Zubets
    RAS/INR, Moscow, Russia
  
  The in­jec­tor pro­vides INR RAS linac by pro­ton beam with en­ergy 400 keV, 200 mks pulse du­ra­tion at pulse rep­e­ti­tion rate 50 Hz. PRR of the pro­ton in­jec­tor has been in­creased to 100 Hz with goal of ris­ing the ac­cel­er­a­tor av­er­age beam cur­rent. Main stages and re­sults of the in­jec­tor mod­ern­iza­tion are pre­sented.  
slides icon Slides THCE01 [3.518 MB]  
 
THPSC03 Study of Superconducting Accelerating Structures for Megawatt Proton Driver Linac cavity, linac, accelerating-gradient, proton 318
 
  • S.M. Polozov, K.A. Aliev, A.M. Fadeev, M. Gusarova, T. Kulevoy, M.V. Lalayan, N.P. Sobenin, O. Verjbitskiy
    MEPhI, Moscow, Russia
  
  Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084
The pre­lim­i­nary de­sign of megawatt level pro­ton ac­cel­er­a­tor-dri­ver is car­ry­ing out by col­lab­o­ra­tion be­tween Russ­ian sci­en­tific cen­ters MEPhI, ITEP, Kur­cha­tov In­sti­tute. This pro­ject was sup­ported in 2013 by the Min­istry of Sci­ence and Ed­u­ca­tion of Rus­sia. The linac gen­eral lay­out in­cludes SC Spoke-cav­i­ties at mid­dle en­ergy range and el­lip­ti­cal cav­ity at high en­ergy one. The usage of QWR and/or HWR at 10-30 MeV was also dis­cussed. Due to elec­tro­dy­nam­ics mod­els of all struc­tures types were de­signed and the elec­tro­dy­nam­ics char­ac­ter­is­tics were stud­ied. QWR, HWQ and Spoke-cav­i­ties were pro­posed to op­er­ate on 324 MHz and el­lip­ti­cal cav­i­ties on 972 MHz. The main elec­tro­dy­nam­ics sim­u­la­tion re­sults will pre­sent in re­port. The mul­ti­pactor study re­sults will also dis­cussed. 		 
 
THPSC05 Study of Possibility of 600-1000 MeV and 1 MW Proton Driver Linac Development in Russia linac, focusing, rfq, proton 324
 
  • S.M. Polozov, A.E. Aksentyev, K.A. Aliev, I.A. Ashanin, Y.A. Bashmakov, A.A. Blinnikov, T.V. Bondarenko, A.N. Didenko, M.S. Dmitriyev, V.V. Dmitriyeva, V.S. Dyubkov, A.M. Fadeev, A. Fertman, M. Gusarova, A.A. Kalashnikova, V.I. Kaminsky, E. Khabibullina, Yu.D. Kliuchevskaia, A.D. Kolyaskin, T. Kulevoy, M.V. Lalayan, S.V. Matsievskiy, V.I. Rashchikov, A.V. Samoshin, E.A. Savin, Ya.V. Shashkov, A.Yu. Smirnov, N.P. Sobenin, S.E. Toporkov, O. Verjbitskiy, A.V. Ziiatdinova, V. Zvyagintsev
    MEPhI, Moscow, Russia
  • P.N. Alekseev, V.A. Nevinnitsa
    NRC, Moscow, Russia
  • V.F. Batyaev, G. Kropachev, D.A. Liakin, S.V. Rogozhkin, Y.E. Titarenko
    ITEP, Moscow, Russia
  • S. Stark
    INFN/LNL, Legnaro (PD), Italy
  
  Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084
Al­ter­na­tive nu­clear en­er­getic's tech­nolo­gies as fast re­ac­tors and ac­cel­er­at­ing dri­ven sys­tems (ADS) are nec­es­sary to solve a num­ber of prob­lems as U-238 or tho­rium fuel re­ac­tor and nu­clear wastes trans­mu­ta­tion. ADS sub­crit­i­cal sys­tem should con­sist of megawatt-power pro­ton ac­cel­er­a­tor, neu­tron pro­duc­ing tar­get and breeder. A num­ber of ADS pro­jects are under de­vel­op­ment in EU, Japan, USA, China, S.​Korea at pre­sent. Su­per­con­duct­ing linacs or their com­plexes with high en­ergy stor­age syn­chro­tron are under de­sign in main pro­jects as a megawatt power pro­ton beam dri­ver. In Russ­ian Fed­er­a­tion the com­plex de­sign for ac­cel­er­a­tor-dri­ver was car­ried down more than ten years ago. The new ap­proach to the ADS com­plex is now under de­vel­op­ment in frame­work of the pro­ject car­ried out by col­lab­o­ra­tion be­tween Russ­ian sci­en­tific cen­ters MEPhI, ITEP, Kur­cha­tov In­sti­tute. This pro­ject was sup­ported in 2013 by the Min­istry of Sci­ence and Ed­u­ca­tion of Rus­sia. A brief re­sults ob­ser­va­tion for ac­cel­er­a­tor part of the pro­ject is pre­sented in re­port. It in­cludes ac­cel­er­a­tor-dri­ver gen­eral lay­out, beam dy­nam­ics sim­u­la­tion, elec­tro­dy­nam­ics sim­u­la­tions of ac­cel­er­at­ing cav­i­ties and analy­sis of tech­no­log­i­cal back­ground in Rus­sia. 		 
 
THPSC18 Suppression of Mechanical Oscillations in Quarterwave 106 MHz Resonator cavity, niobium, TRIUMF, superconductivity 359
 
  • M. Gusarova, I.I. Petrushina, I.V. Rybakov, Ya.V. Shashkov, Ya.V. Shashkov, V. Zvyagintsev
    MEPhI, Moscow, Russia
  • V. Zvyagintsev
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  
  An­a­lyt­i­cal cal­cu­la­tions and nu­mer­i­cal sim­u­la­tions have been done for me­chan­i­cal eigen­modes of quar­ter wave su­per­con­duct­ing res­onators with op­er­at­ing fre­quency of 106 MHz and 80 MHz. A pos­si­bil­ity of fre­quency shift of me­chan­i­cal modes in 106 MHz res­onator has been es­ti­mated by ap­pli­ca­tion of the damper. We have op­ti­mized the damper's po­si­tion for sup­pres­sion ef­fi­ciency. We have also com­pared the nu­mer­i­cal and ex­per­i­men­tal re­sults.  
 
THPSC19 Influence of the Different Geometric Parameters of Superconducting Elliptical Cavities on the Multipactor accelerating-gradient, electron, cavity, multipactoring 362
 
  • M. Gusarova, I.I. Petrushina
    MEPhI, Moscow, Russia
  
  The re­sults of nu­mer­i­cal sim­u­la­tions of mul­ti­pact­ing in the dif­fer­ent su­per­con­duct­ing el­lip­ti­cal cav­i­ties are pre­sented. Ques­tion of in­flu­ence of the aper­ture ra­dius, equa­tor shape, iris shape and fre­quency and elec­tron tra­jec­to­ries for dif­fer­ent geo­met­ri­cal pa­ra­me­ters of el­lip­tic struc­tures are con­sid­ered.  
 
THPSC43 Electrostatic Pick-ups for Debunched Beams at INR Linac pick-up, operation, electronics, detector 420
 
  • S.A. Gavrilov, P.I. Reinhardt-Nickoulin, I.V. Vasilyev
    RAS/INR, Moscow, Russia
  
  Pick-ups are one of the most wide­spread non-de­struc­tive di­ag­nos­tics at charged par­ti­cle ac­cel­er­a­tors. These de­tec­tors, also known as beam po­si­tion mon­i­tors, are gen­er­ally used for the cen­ter-of-mass po­si­tion mea­sure­ments of bunched beams. The paper de­scribes the re­search re­sults for in­fre­quent case of de­bunched beams op­er­a­tion. Mea­sure­ment pe­cu­liar­i­ties and dis­tinc­tive fea­tures of elec­tron­ics are pre­sented. The re­sults of test bench-based mea­sure­ments and 3D fi­nite el­e­ment sim­u­la­tions are dis­cussed.  
poster icon Poster THPSC43 [2.287 MB]  
 
THPSC46 Simulation and Optimization of Ion Optical Extraction, Acceleration and H-minus Ion Beam Matching Systems ion, extraction, acceleration, emittance 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.