Abstracts Brochure - 2nd International Particle Accelerator Conference

Poster Panel 5
ID: 3311 - THPZ001
Spin Dynamic Tool Developments and Study
Regarding the Super-B Project, Nicolas Monseu
(LPSC, Grenoble Cedex), Francois Meot (BNL,
Upton, Long Island, New York), Jean-Marie De
Conto (LPSC, Grenoble), Ulrich Wienands (SLAC,
Menlo Park, California) - The study of polarization
is essential for e+/e- colliders like the SuperB
machine. The ZGOUBI integrator is a good and
universal tool for particle tracking as well as spin
tracking, and takes into account all machine realistic
aspects, like real fields, non-linearities, fringing
fields or misalignments. We present ZGOUBI
implementation and the methods carried out to
estimate invariant spin field and beam polarization
evolution on some simple models (for validation)
and on SuperB, and we investigate for some specific
polarization behavior.
Sub Classification: A02 Lepton Colliders
Poster Panel 6
ID: 3985 - THPZ009
Beam Background Simulation for
SuperKEKB/Belle-II, Hiroshi Nakano (Tohoku
University, Sendai), Hiroyuki Nakayama (KEK,
Tsukuba) - The Belle experiment is now being
upgraded to the Belle II experiment designed for a
40 times higher luminosity. Such a high luminosity
is realized by the SuperKEKB collider where beaminduced
background rates are expected to be much
higher than those of KEKB. This poses a serious
challenge for the design of the machine-detector
interface. We have thus carried out a GEANT4based
beam background simulation for Touschek
effect and beam-gas scatterings. We describe the
method of generating background particles and
present the result of simulation.
Sub Classification: A02 Lepton Colliders
Poster Panel 7
ID: 3154 - THPZ015
LHeC Lattice Design, Miriam Fitterer,
Oliver Sim Brüning, Helmut Burkhardt,
Bernhard Johannes Holzer, John M. Jowett, Karl
Hubert Mess, Thys Risselada (CERN, Geneva),
Anke-Susanne Mueller (KIT, Karlsruhe), Max Klein
(The University of Liverpool, Liverpool) - The
Large Hadron Electron Collider (LHeC) aims at
lepton-proton and lepton-nucleus collisions with
�
3
centre of mass energies of 1-2 TeV at ep
luminosities in excess of 10^33 cm^-2 s^-1. We
present here a lattice design for the electron ring
option, which meets the design parameters and also
the constraints imposed by the integration of the new
electron ring in the LHC tunnel.
Sub Classification: A17 Electron-Hadron Colliders
Poster Panel 8
ID: 3801 - THPZ031
Halo Scraping with Collimators in the LHC,
Florian Burkart, Ralph Assmann, Roderik Bruce,
Marija Cauchi, Daniel Deboy, Stefano Redaelli,
Daniel Wollmann (CERN, Geneva) - The population
of the beam halo has been measured in the LHC
with beam scraping experiments. Primary
collimators of the LHC collimation system were
used to scrape the beam halo at different statuses of
the machine (injection, top energy, separated and
colliding beams). In addition these measurements
were used to calibrate the beam loss monitor signals
to loss rates at the primary collimators. Within this
paper the halo scraping method, the measured halo
distribution and the calibration factors are presented
and compared to theoretical predictions.
Sub Classification: T19 Collimation
Poster Panel 9
ID: 3800 - THPZ035
Semi-automatic Beam-based Alignment
Algorithm for the LHC Collimation System,
Gianluca Valentino, Nicholas Sammut (CERN,
Geneva; University of Malta, Msida), Ralph
Assmann, Stefano Redaelli, Daniel Wollmann
(CERN, Geneva) - Full beam-based alignment of the
LHC collimation system was a lengthy procedure as
the collimators were set up manually. A yearly
alignment campaign has been sufficient for now,
although in future this may lead to a decrease in the
cleaning efficiency if machine parameters such as
the beam orbit drift over time. Automating the
collimator setup procedure can allow for more
frequent alignments, therefore reducing this risk.
This paper describes the design and testing of a
semi-automatic algorithm as a first step towards a
fully automatic setup. Its implementation in the
collimator control software and future plans are
described.
Sub Classification: T19 Collimation