Author: Jansson, A.
Paper Title Page
TUPC131 Overview of ESS Beam Loss Monitoring System 1329
 
  • L. Tchelidze, A. Jansson
    ESS, Lund, Sweden
  
  Eu­ro­pean Spal­la­tion Source (ESS) is a mul­ti-MW pro­ton lin­ear ac­cel­er­a­tor that will be built in Lund, Swe­den. Due to the high power of the ma­chine, loss­es need to be min­i­mized to avoid dam­ag­ing the ac­cel­er­a­tor com­po­nents and quench­ing su­per­con­duct­ing mag­nets. Loss mon­i­tors have to be po­si­tioned all across the ac­cel­er­a­tor, so that they form a re­li­able pro­tec­tion sys­tem. A care­ful anal­y­sis of the loss na­ture for ESS is in progress to de­ter­mine the lo­ca­tions for the loss de­tec­tors. This paper pre­sents pre­lim­i­nary re­sults of the sim­u­la­tions for the de­tec­tor re­sponse func­tions, which are cal­cu­lat­ed for sev­er­al dif­fer­ent en­er­gies and in­ci­dent an­gles of pro­tons, at cer­tain parts of the ac­cel­er­a­tor. A sim­ple, base­line ge­om­e­try con­fig­u­ra­tion is used in the cal­cu­la­tions. This paper also gives an overview of the con­sid­ered ESS beam loss mon­i­tor­ing sys­tem. It de­scribes the types of the de­tec­tors which are planned to be used at ESS, and dis­cuss­es the num­ber of de­tec­tors need­ed along dif­fer­ent parts of the ma­chine. As planned, a pri­ma­ry tool for mea­sur­ing loss­es at ESS will be ion­iza­tion cham­bers, the con­cep­tu­al de­sign of which is given in this paper based on the re­sponse time con­sid­er­a­tions.  
 
WEPS059 Layout of the ESS Linac 2631
 
  • H. Danared, M. Eshraqi, W. Hees, A. Jansson, M. Lindroos, S. Peggs, A. Ponton
    ESS, Lund, Sweden
  
  The Eu­ro­pean Spal­la­tion Source will use a 2.5 GeV, 50 mA pulsed pro­ton linac to pro­duce an av­er­age 5 MW of power on the spal­la­tion tar­get. It will con­sist of nor­mal-con­duct­ing part ac­cel­er­at­ing par­ti­cles to 50 MeV in an RFQ and a drift-tube linac and a su­per­con­duct­ing part with spoke res­onators and two fam­i­lies of el­lip­ti­cal cav­i­ties. A high-en­er­gy beam trans­port takes the par­ti­cles through an up­grade sec­tion and at least one bend and de­mag­ni­fies the beam on to the tar­get. The paper will pre­sent the cur­rent lay­out of the linac and dis­cuss pa­ram­e­ters that de­fine its length from source to tar­get.  
 
WEPS062 Design and Beam Dynamics Study of Hybrid ESS LINAC 2640
 
  • M. Eshraqi, H. Danared, W. Hees, A. Jansson
    ESS, Lund, Sweden
  
  The Eu­ro­pean Spal­la­tion Source, {\sc ESS}, will use a su­per­con­duct­ing lin­ear ac­cel­er­a­tor de­liv­er­ing high cur­rent long puls­es with an av­er­age beam power of 5~MW to the tar­get sta­tion at 2.5~GeV. A new cry­omod­ule ar­chi­tec­ture is pro­posed which al­lows for a tran­si­tion be­tween cry­omod­ules in the sub-100~K re­gion, this re­gion can work even at room tem­per­a­ture. This new hy­brid de­sign will gen­er­ate a lower heat load with re­spect to a fully seg­ment­ed de­sign - while still pro­vid­ing easy ac­cess to in­di­vid­u­al cry­omod­ules for main­te­nance and re­pair. This paper will pre­sent a re­view of the {\sc linac} de­sign, beam dy­nam­ics stud­ies and a pre­lim­i­nary cryo­genic anal­y­sis of the tran­si­tion re­gion.