Author: Blondel, A.P.
Paper Title Page
TUPFI020 Towards a Symmetric Momentum Distribution in the Muon Ionization Cooling Experiment 1376
 
  • O.M. Hansen
    University of Oslo, Oslo, Norway
  • A.P. Blondel
    DPNC, Genève, Switzerland
  • I. Efthymiopoulos, O.M. Hansen
    CERN, Geneva, Switzerland
  
  The Muon Ion­iza­tion Cool­ing Ex­per­i­ment (MICE) is under de­vel­op­ment at Ruther­ford Ap­ple­ton Lab­o­ra­tory (UK). It's a proof-of-prin­ci­ple ex­per­i­ment for ion­iza­tion cool­ing, which is a pre­req­ui­site for a fu­ture Neu­trino Fac­tory(NF) or a Muon Col­lider. The muon beam is de­signed to have a sym­met­ri­cal mo­men­tum dis­tri­b­u­tion in the cool­ing chan­nel of the NF. In the MICE beam­line pions are cap­tured by a quadru­pole triplet, then pion mo­men­tum is se­lected by di­pole 1 (D1) after which the pions decay to muons in the decay so­le­noid. After the decay so­le­noid, the muon beam mo­men­tum is se­lected by di­pole 2 (D2), the beam is fo­cused in two quadru­pole triplets and is fi­nally char­ac­ter­ized by a set of de­tec­tors. By doing a D1-scan of the cur­rents, where the op­tics pa­ra­me­ters are scaled ac­cord­ing to the pion mo­men­tum, from 238-450 MeV/c the muon mo­men­tum dis­tri­b­u­tion is changed. In this paper sim­u­la­tion re­sults from G4Beam­line and real data from MICE are pre­sented and com­pared.  
 
TUPFI046 The MICE Experiment 1454
 
  • A.P. Blondel
    DPNC, Genève, Switzerland
  
  Ion­iza­tion Cool­ing is the only prac­ti­cal so­lu­tion to prepar­ing high bril­liance muon beams for a neu­trino fac­tory or muon col­lider. MICE is under de­vel­op­ment at the Ruther­ford Ap­ple­ton Lab­o­ra­tory (UK). It is char­ac­ter­ized by ex­quis­ite emit­tance de­ter­mi­na­tion by 6D mea­sure­ment of in­di­vid­ual par­ti­cles, a cool­ing sec­tion com­pris­ing 23 MV of ac­cel­er­a­tion at 200 MHz and 3 liq­uid hy­dro­gen ab­sorbers to­tal­ing 1m of liq­uid hy­dro­gen on the path of 140-240 MeV/c muons. The beam has al­ready been com­mis­sioned suc­cess­fully and first mea­sure­ments of beam emit­tance per­formed. We are set­ting up for the final high pre­ci­sion emit­tance de­ter­mi­na­tion and the mea­sure­ments of cool­ing in Li Hy­dro­gen. The de­sign of­fers op­por­tu­ni­ties to ob­serve cool­ing with var­i­ous ab­sorbers and sev­eral op­tics con­fig­u­ra­tions. Re­sults will be com­pared with de­tailed sim­u­la­tions of cool­ing chan­nel per­for­mance to en­sure full un­der­stand­ing of the cool­ing process. Progress to­wards the full cool­ing ex­per­i­ment with RF re-ac­cel­er­a­tion will also be re­ported.
Submitted by the MICE speakers bureau
hoping for a contributed oral
to be give by the spokesperson, prof. A. Blondel 		 
 
TUPME040 TLEP: High-performance Circular e+e− Collider to Study the Higgs Boson 1658
 
  • M. Koratzinos, O. Brunner, A.C. Butterworth, J.R. Ellis, P. Janot, E. Jensen, J.A. Osborne, F. Zimmermann
    CERN, Geneva, Switzerland
  • R. Aleksan
    CEA/DSM/IRFU, France
  • A.P. Blondel
    DPNC, Genève, Switzerland
  • M. Zanetti
    MIT, Cambridge, Massachusetts, USA
  
  The re­cent dis­cov­ery of a light Higgs boson has opened up con­sid­er­able in­ter­est in cir­cu­lar e+e− Higgs fac­to­ries around the world. We re­port on the progress of the “TLEP3” con­cept since last year. Two op­tions are con­sid­ered: LEP3, a 240 GeV cen­tre-of-mass (Ecm) e+e− ma­chine in the LHC tun­nel with cost only a frac­tion of the cost of an equiv­a­lent lin­ear col­lider, due to the use of ex­ist­ing in­fra­struc­ture and the two gen­eral-pur­pose LHC de­tec­tors, and TLEP, an e+e− ma­chine in a new 80 km tun­nel that can op­er­ate up to an Ecm of 350 GeV. Both con­cepts enjoy the ex­ten­sive know-how on cir­cu­lar col­lid­ers and how to de­liver their de­sign lu­mi­nos­ity, and the ex­is­tence of up to four in­ter­ac­tion points. The at­tain­able lu­mi­nosi­ties are 1034/cm2/s and 5x1034/cm2/s per in­ter­ac­tion point for LEP3 and TLEP re­spec­tively. Both ma­chines can op­er­ate as Tera-Z and Mega-W boson fac­to­ries, giv­ing de­ci­sive op­por­tu­ni­ties for over-con­strain­ing the elec­troweak sec­tor of the Stan­dard Model. The tech­ni­cal chal­lenges and pos­si­ble ways to im­prove the per­for­mance fur­ther will be dis­cussed.