EPAC 2000 Papers,
LHC99 Beam-Beam Workshop,
LHC Impedance Working Group,
LHC Beam-Beam Studies,
BibTEX Bibliography,
WWW page on Electron Cloud,
EPAC98 Papers
Single-beam collective effects can limit the intensity and thus the performance
of the Large Hadron Collider (LHC),
unless the impedance of the different vacuum
chamber discontinuities seen by the beam is kept below certain limits.
This has an impact on the design of several machine components, such as
monitors,
kickers,
bellows, warm sections,
experimental beam pipes,
rf-cavities,
feedback systems and especially on the
beam screen, with its millions of
pumping slots.
Moreover, the large number of hard U.V. photons due to synchrotron radiation
liberate photo-electrons, which are pulled towards the positively charged proton bunch.
When they hit the opposite
wall, they generate secondary electrons which can in turn be accelerated by the next bunch if they are
slow enough to survive. This mechanism can lead to the fast build-up of an
electron cloud
with potential implications for beam stability and heat load on the beam screen.
EPAC 2000 Papers,
LHC99 Beam-Beam Workshop,
LHC Impedance Working Group,
LHC Beam-Beam Studies,
BibTEX Bibliography,
WWW page on Electron Cloud,
EPAC98 Papers
| Impedance Budget | Tune Shifts | Narrow-Band Impedance | Multi-Bunch Instabilities |
| Parasitic Losses | Activity in 1996 | Activity in 1997 | PUBLICATIONS |
| Francesco RUGGIERO | Electron cloud, Landau damping, impedance budget |
 |
 |
| Daniel BRANDT | Impedance and instabilities |
|
|
| Oliver BRUNING | Impedance calculations and database, simulations |
|
|
| Andrea MOSTACCI (Rome Univ.) | Impedance estimates: slots and rough surface |
|
|
| Jocelyn TAN | Impedance measurements |
 |
|
| Hiroshi TSUTSUI | Impedance calculations and measurements, instabilities |
|
|
| Luc VOS | IBS, impedances, instabilities and feedback |
|
|
| Xiaolong ZHANG | Multipacting tests and electron cloud simulations |
|
|
| Frank ZIMMERMANN | Space charge, beam-beam and electron cloud simulations |
|
|
| Scott BERG (Indiana Univ.) | Multi-bunch instabilities and Landau damping |
|
|
| Fritz CASPERS (CERN PS-RF) | Impedance measurements and multipacting tests |
|
|
| Luisa CAPPETTA (Salerno Univ.) | Transient space charge with resistive wall |
|
|
| Oleg DANILOV et. al. (BINP) | Resistive wall and kicker impedance |
|
|
| Mikhail D'YACHKOV (Triumf) | Impedance calculations and microwave instability |
|
|
| Kohji HIRATA (KEK) | Beam-beam with crossing angle |
|
|
| Olaf MEINCKE | Wakefields and multi-bunch simulations |
|
|
| Michele MORVILLO (CERN PS-RF) | Impedance measurements and multipacting tests |
|
|
| Stefania PETRACCA (Salerno Univ.) | Laslett tune shifts and space charge |
|
|
| Gennady STUPAKOV (SLAC) | Electron cloud build-up |
|
|
MathCad Program for Transmission Line calculations (impedance of multi-layered chambers)
Mathematica Notebook for Power Loss through LHC pumping slots
Program for Computing Energy Gain of Photoelectrons
Impedance database ZBASE
Single- and multi-bunch instability package VLASOV
Programs for generating Landau damping curves
Various impedance estimates
BINP codes for electromagnetic calculations
BBC: Program for Beam-Beam Interaction with Crossing Angle
Bibliography on Computer Codes in Accelerator Physics
Multipacting tests with a resonant coaxial setup
Surface resistance measurements for the LHC beam screen
WWW page on beam echo measurements in the SPS
Impedance measurements for the pumping holes in the LHC liner
Electron Cloud in the LHC
PAC97 Papers
Special LHC Forum on Future LHC Beam-Beam Studies
Landau damping and
octupoles
Transverse Instabilities in the LHC
Single-beam collective effects in the LHC
Anomalous skin effect and resistive wall heating
LHC Forums, Beam Physics Discussions and
SL-AP Seminar Calendar
Index of
collective
Bibliography:
local
BibTeX database or
SPIRES results