THO2LR —  Working Group B   (13-Nov-14   10:50—12:30)
Chair: I. Hofmann, GSI, Darmstadt, Germany
Paper Title Page
THO2LR01 H− Beam Optics for the Laser Stripping Project 350
 
  • T.V. Gorlov, A.V. Aleksandrov, S.M. Cousineau, V.V. Danilov, M.A. Plum
    ORNL, Oak Ridge, Tennessee, USA
  
  Suc­cess­ful re­al­iza­tion of the laser strip­ping ex­per­i­ment de­pends mainly on cor­rect tai­lor­ing of H− bunch and laser beam. H− beam prepa­ra­tion is a chal­leng­ing task that re­quires to tune up about 10 pa­ra­me­ters si­mul­ta­ne­ously in situ and tak­ing into ac­count life state of ac­cel­er­a­tor. This makes a huge tech­no­log­i­cal dif­fer­ence com­pared to the foil strip­ping method. In this paper we pre­sent ex­pe­ri­ence and meth­ods of tun­ing the H− bunch.  
 
THO2LR02 Beam Dynamics and Experiment of CPHS Linac 355
 
  • L. Du, C.T. Du, X. Guan, C.-X. Tang, R. Tang, X.W. Wang, Q.Z. Xing, S.X. Zheng
    TUB, Beijing, People's Republic of China
  • M.W. Wang
    Tsinghua University, Beijing, People's Republic of China
  
  Funding: Work supported by National Natural Science Foundation of China (Major Research Plan Grant No. 91126003 and 11175096)
We pre­sent, in this paper, the pre­sent beam dy­nam­ics sim­u­la­tion re­sults and ex­per­i­ments of the 3 MeV high cur­rent pro­ton linac for the Com­pact Pulsed Hadron Source (CPHS) at Ts­inghua Uni­ver­sity. The beam dy­nam­ics sim­u­la­tions of the re­cent sta­tus of the linac have been done, which helps the op­er­a­tion. Fa­cil­ity used for 2D beam pro­file mea­sure­ment which is based on the CT al­go­rithm with ro­tat­able multi-wires, is under de­vel­op­ment. Some other ex­per­i­ments such as beam po­si­tion mea­sure­ment will also be in­tro­duced below. 		 
slides icon Slides THO2LR02 [3.479 MB]  
 
THO2LR03
 Beam Halo Control Study on the ADS Superconducting Linac Design at IHEP  
 
  • F. Yan, H. Geng, C. Meng, S. Pei, J.Y. Tang
    IHEP, Beijing, People's Republic of China
  • Z. Li
    SCU, Chengdu, People's Republic of China
  
  The Ac­cel­er­a­tor Dri­ven sub-crit­i­cal Sys­tem (ADS) has an ex­tremely low beam loss rate de­mand for the dri­ver linac be­cause of the high power in­ten­sity needed to be trans­ferred to the tar­get. China ADS pro­ject is pro­posed to build a 15 MW pro­ton linac with final en­ergy of 1.5 GeV and an av­er­age beam cur­rent of 10 mA. Ful­fill­ing the 1 W/m power losses re­stric­tion along the whole linac posed a very high re­quire­ment on the sta­bil­ity of the dri­ver linac de­sign. Most of the beam losses in this level as­so­ci­ated with the halo par­ti­cles. In the de­sign stage of China ADS linac, the beam halo are con­trolled in sev­eral as­pects ac­cord­ing to the halo for­ma­tion mech­a­nisms. Rea­son­able de­signs have been achieved for the China ADS In­jec­tor-I with few per­cent­age of nor­mal­ized rms emit­tances. Ex­ten­sive error analy­sis were car­ried out to test the sta­bil­ity of the In­jec­tor-I de­sign. The de­sign con­sid­er­a­tions, the re­sults of an op­ti­mized de­sign and the beam dy­namic sim­u­la­tions in­clud­ing ma­chine er­rors are in­tro­duced and pre­sented in de­tail.  
slides icon Slides THO2LR03 [3.023 MB]  
 
THO2LR04 Catalogue of Losses for the Linear IFMIF Prototype Accelerator 360
 
  • N. Chauvin, P.A.P. Nghiem
    CEA/DSM/IRFU, France
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  • C. Oliver
    CIEMAT, Madrid, Spain
  • D. Uriot
    CEA/IRFU, Gif-sur-Yvette, France
  
  One major ac­tiv­ity of the EVEDA (En­gi­neer­ing Val­i­da­tion and En­gi­neer­ing De­sign Ac­tiv­i­ties) phase of the IFMIF (In­ter­na­tional Fu­sion Ma­te­ri­als Ir­ra­di­a­tion Fa­cil­ity) pro­ject con­sists in build­ing, test­ing and op­er­at­ing, in Japan, a 125 mA/9 MeV deuteron ac­cel­er­a­tor, called LIPAc, which has been de­vel­oped in Eu­rope. For the ac­cel­er­a­tor safety as­pects, a pre­cise knowl­edge of beam loss lo­ca­tion and power de­po­si­tion is cru­cial, es­pe­cially for a high in­ten­sity, high power ac­cel­er­a­tor like LIPAc. This paper pre­sents the beam dy­nam­ics sim­u­la­tions al­low­ing to es­ti­mate beam losses in dif­fer­ent sit­u­a­tions of the ac­cel­er­a­tor life­time: start­ing from scratch, beam com­mis­sion­ing, tun­ing or ex­plo­ration, rou­tine op­er­a­tion, sud­den fail­ure. Some re­sults of these stud­ies are given and com­mented on. Rec­om­men­da­tions for hot point pro­tec­tion, beam stop ve­loc­ity, beam power lim­i­ta­tion are given ac­cord­ingly.  
slides icon Slides THO2LR04 [2.790 MB]