FCC Week 2017

Session

FCC-ee

31 May 2017, 08:30

"Charlottenburg I-II"

Conveners

FCC-ee: Review: Optics & instrumentation

• John Seeman (SLAC)

FCC-ee: Review: Machine detector interface

• Katsunobu Oide (High Energy Accelerator Research Organization (JP))

FCC-ee: Review: Energy calibration & polarization

• Evgeny Levichev (Budker Institute of Nuclear Physics (RU))

FCC-ee: Review: Collective effects & top-up injection

• Maria Enrica Biagini

FCC-ee: Beam dynamics

• Bernhard Holzer (CERN)

FCC-ee: Review: injectors

• Yannis Papaphilippou (CERN)

166. Status of optics

Katsunobu Oide (High Energy Accelerator Research Organization (JP))

31/05/2017, 08:30

167. Overview of optics tuning results and tolerances

Sandra Aumon (CERN)

31/05/2017, 08:55

"The FCC-ee project foresees to build a 100 km e+/e- circular collider for precision studies and rare decay observations in the range of 90 to 350 GeV center of mass energy with luminosities in the order of 10^35 cm^-2s^-1. In
order to reach such performances, an extrem focusing of the beam is required in the interaction regions with a low vertical beta function of 2mm at the IP.
Moreover, the...

169. Emittance measurement using X-ray interferomter and proposal for test in Australian Synchrotron

Toshiyuki Mitsuhashi (KEK)

31/05/2017, 09:20

For a demonstration of the performance of the X-ray interferometer, we propose a test at the long-range Imaging and Medical Beamline (IMBL) at the Australian Synchrotron. The Australian Synchrotron is a SR facility in the Australia, and it has a remarkable long range beamline for medical imaging. We can construct a Young’s type double slit interferometer in this beam line which will be...

170. MDI status and overview

Manuela Boscolo (INFN e Laboratori Nazionali di Frascati (IT))

31/05/2017, 10:30

The wide range of beam energies of the FCC-ee accelerator presents unique challenges to the interaction region. The lowest beam energy is 45.6 GeV (Z running) and the highest beam energy is 175 GeV (tt running). The lowest beam energy machine will have 1.45 A of beam current while the highest beam energy machine will have 6.6 mA. We present an update of the IR design with emphasis on the...

171. MDI: synchrotron radiation protection

Michael Kenneth Sullivan (SLAC National Accelerator Laboratory (US))

31/05/2017, 10:55

172. MDI: trapped modes and other power losses

Alexander Novokhatski (SLAC National Accelerator Laboratory (US))

31/05/2017, 11:15

We discuss the problem of the Higher Order Modes heating in the Interaction Region of FFC ee. High current beams excite high frequency modes in IR due to very complicated geometry. We analyze the effect of geometrical transitions in IR on the excitation of HOMs. We suggest using a special water-cooled HOM absorber to capture the HOM power.

173. Solenoid copensation scheme & final quadrupole

Evgeny Levichev (Budker Institute of Nuclear Physics (RU))

31/05/2017, 11:35

174. Overview of energy calibration

Alain Blondel (Universite de Geneve (CH))

31/05/2017, 13:30

175. Transverse polarization

Eliana Gianfelice-Wendt (Fermi National Accelerator Lab. (US))

31/05/2017, 13:50

176. Resonant depolarization process and systematic errors

Dr Anton Bogomyagkov (Budker Institute of Nuclear Physics (RU))

31/05/2017, 14:10

The goal of beam energy calibration is to define central mass energy at the interaction point (IP). The most accurate method is resonant depolarization technique with relative error of 1 ppm in single beam energy calibration. The whole procedure consists of measurement of spin precession frequency, and calculations of beam energy averaged over circumference, beam energy at IP and central mass...

177. Polarimeter design

Jorg Wenninger (CERN)

31/05/2017, 14:30

178. Beam-beam overview

Dmitry Shatilov (Budker Institute of Nuclear Physics (RU))

31/05/2017, 15:30

179. Impedance model and collective effects for FCC-ee

Eleonora Belli (Sapienza Universita e INFN, Roma I (IT))

31/05/2017, 15:55

FCC-ee is an e+e- circular collider designed to accelerate and collide counter-propagating beams of electrons and positrons. One of the fundamental aspects to be addressed in the design phase is the intensity limitation due to collective effects and the impedance budget. The machine design must be such that the global machine impedance as well as individual equipment do not pose any limits for...

180. Transient beam loading

Dmitry Teytelman (Dimtel, Inc.)

31/05/2017, 16:15

In a storage ring, interaction between the fundamental impedance of the accelerating cavities and the beam determines such important longitudinal properties as bunch length, synchronous phase, synchrotron frequency, and others. This interaction is especially important in machines with large circumference and high stored beam current. In this work, steady-state beam loading effects will be...

181. Top-up injection scheme

Masamitsu Aiba (Paul Scherrer Institut (CH))

31/05/2017, 16:35

182. Beam-beam simulations update

kazuhito ohmi (KEK)

01/06/2017, 08:30

183. Beam losses from beamstrahlung and radiative bhabha

Dima El Khechen (CERN)

01/06/2017, 08:50

184. Accelerating and injecting polarized beams

Ivan Koop (Budker Institute of Nuclear Physics (RU))

01/06/2017, 09:10

185. CEPC Overall Design related to Accelerator Physics

Chenghui Yu (Institute of High Energy Physics (CN))

01/06/2017, 09:30

The baseline of CEPC is a double ring configuration with the circumference of 100km. The booster has the same circumference as main collider ring in the same tunnel with injection energy of 10GeV. The exit energy of the LINAC for electron and positron is 10GeV. The Overall design of CEPC related to accelerator physics will be described in detail.

186. Overview of injector complex

John Seeman (SLAC)

01/06/2017, 10:30

187. Linac and damping ring

Salim Ogur (CERN)

01/06/2017, 10:50

188. e+ system

Iryna Chaikovska (Universite de Paris-Sud 11 (FR))

01/06/2017, 11:10

189. Prebooster ring

Ozgur Etisken

01/06/2017, 11:25

The FCC-e+e- injector complex needs to produce and to transport a high-intensity e+/e- beam at a fast repetition rate of about 0.1 Hz for topping up the collider at its collision energy. A basic parameter set exists for all the collider energies, assuming a 10 GeV linac operating with a large number of bunches being accumulated in the existing SPS, which serves as pre-accelerator and damping...

190. Booster ring

Bastian Harer (CERN)

01/06/2017, 11:40

The beam lifetime at FCC-ee will be limited to less than one hour, because of radiative Bhaba scattering and beamstrahlung. In order to keep the luminosity on the high level of 10^35 cm^-2s^-1 continuous top-up injection is required. Therefore, besides the collider, that will operate at constant energy, a fast cycling booster synchrotron will be installed in the same tunnel.
The injection...

168. Beam instrumentation for FCC-ee

Hermann Schmickler (CERN)