| Paper |
Title |
Other Keywords |
Page |
| WEAY04 |
Analysis of the magnetized friction force
|
electron, ion, simulation, plasma |
210 |
| |
- A. V. Fedotov
BNL, Upton, Long Island, New York
- D. L. Bruhwiler
Tech-X, Boulder, Colorado
- A. O. Sidorin
JINR, Dubna, Moscow Region
| |
A comprehensive examination of theoretical models for the friction force, in use by the electron cooling community, was performed. Here, we present our insights about the models gained as a result of comparison between the friction force formulas and direct numerical simulations, as well as studies of the cooling process as a whole.
|
|
|
|
| WEAZ05 |
Very Fast Beam Losses at HERA, and what has been done about it
|
power-supply, beam-losses, luminosity, quadrupole |
215 |
| |
- K. Wittenburg, M. Werner
DESY, Hamburg
| |
During the Luminosity upgrade of HERA in 2000/2001 more than 50 new magnets were installed close to the interaction region to provide a stronger focussing of the two beams. Some of these magnets are located at very large values of the betatron function and therefore act with a large gain on the beam. Sudden changes in the power supply currents had led to very fast beam losses, creating quenches and increased radiation levels. This talk will discuss the improvements made to the HERA machine protection system to make sure that the beam is dumped in time in case of these events.
|
|
|
|