Colliders
Tech 19: Collimation and Targetry
Paper Title Page
MOODN3 Advanced Bent Crystal Collimation Studies at the Tevatron (T-980) 73
 
  • V.V. Zvoda, J. Annala, R.A. Carrigan, A.I. Drozhdin, T.R. Johnson, S. Kwan, N.V. Mokhov, A. Prosser, R.E. Reilly, R. Rivera, V.D. Shiltsev, D.A. Still, L. Uplegger, J.R. Zagel
    Fermilab, Batavia, USA
  • E. Bagli, V. Guidi, A. Mazzolari
    INFN-Ferrara, Ferrara, Italy
  • Y.A. Chesnokov, I.A. Yazynin
    IHEP Protvino, Protvino, Moscow Region, Russia
  • Yu.M. Ivanov
    PNPI, Gatchina, Leningrad District, Russia
 
  Funding: * Work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy through the US LHC Accelerator Research Program (LARP).
The T-980 bent crystal collimation experiment at the Tevatron has recently acquired substantial enhancements. First, two new crystals - a 16-strip one manufactured and characterized by the INFN Ferrara group and a quasi-mosaic crystal manufactured and characterized by the PNPI group. Second, a two plane telescope with 3 high-resolution pixel detectors per plane along with corresponding mechanics, electronics, control and software has been manufactured, tested and installed in the E0 crystal region. The purpose of the pixel telescope is to measure and image channeled (CH), volume-reflected (VR) and multiple volume-reflected (MVR) beam profiles produced by bent crystals. Third, an ORIGIN-based system has been developed for thorough analysis of experimental and simulation data. Results of analysis are presented for different types of crystals used from 2005 to present for channeling and volume reflection including pioneering tests of two-plane crystal collimation at the collider, all in comparison with detailed simulations.
 
slides icon Slides MOODN3 [1.052 MB]  
 
THP109 Dielectric Collimators for Linear Collider Beam Delivery System 2330
 
  • A. Kanareykin, P. Schoessow
    Euclid TechLabs, LLC, Solon, Ohio, USA
  • S. Baturin
    LETI, Saint-Petersburg, Russia
  • R. Tomás
    CERN, Geneva, Switzerland
 
  Funding: US Department of Energy
The current status of ILC and CLIC concepts require additional research on wakefield reduction in the collimator sections. New materials and new geometries have been considered recently*. Dielectric collimators for the CLIC Beam Delivery System have been discussed with a view to minimize the BDS collimation wakefields**. Dielectric collimator concepts for the linear collider are presented in this paper; cylindrical and planar collimators for the CLIC parameters have been considered, and simulations to minimize the beam impedance have been performed. The prototype collimator system is planned to be fabricated and experimentally tested at Facilities for Accelerator Science and Experimental Test Beams (FACET) at SLAC.
*J.R.Lopez. ILC-CLIC Beam Dynamics Workshop. CERN, Geneva, 23-25 June, 2009.
**R. Tomas. ILC-CLIC Beam Dynamics Workshop. CERN, Geneva, 23-25 June, 2009.
 
 
THP110 Front End Energy Deposition and Collimation Studies for IDS-NF 2333
 
  • C.T. Rogers
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • D.V. Neuffer
    Fermilab, Batavia, USA
  • P. Snopok
    IIT, Chicago, Illinois, USA
 
  Funding: Work supported by DOE, STFC.
The function of the Neutrino Factory front end is to reduce the energy spread and size of the muon beam to a manageable level that will allow reasonable throughput to subsequent system components. Since the Neutrino Factory is a tertiary machine (protons to pions to muons), there is an issue of large background from the pion-producing target. The implications of energy deposition in the front end lattice for the Neutrino Factory are addressed. Several approaches to mitigating the effect are proposed and discussed, including proton absorbers, chicanes, beam collimation, and shielding.