EUCARD workshop "Spin optimization at Lepton accelerators"

Session

Spin Optimization: Produktion

Feb 13, 2014, 9:00 AM

Mainz

Conveners

Spin Optimization: Produktion

• Kurt Aulenbacher (Institut für Kernphysik, Universität Mainz)

8. Polarized positrons at the ILC - physics goal and source requirements

Sabine Riemann (DESY)

2/13/14, 9:00 AM

At the International Linear Collider (ILC) both beams --electrons and positrons-- will be polarized since the positron source is based on a helical undulator. The electron beam passes the undulator which is located at the end of the main linac. So the undulator parameters are strongly coupled to the centre-of-mass energy. The positron polarization has to be optimized for each energy ...

9. ILC Polarized Positron Source at Center-of-Mass Energies of 250 GeV and 1 TeV

Andriy Ushakov (University of Hamburg)

2/13/14, 9:30 AM

The base-line positron source of the future International Linear Collider (ILC) is polarized and designed for an operation with electron drive beam energies between 150 GeV and 250 GeV (corresponding to 300 GeV up to 500 GeV CM energies). However, running at CM energies below 300 GeV reduces the positron yield substantially; running at Ecm = 1 TeV implies a low degree of positron...

15. Possible Approach for Reaching High Energy Polarized Electron and Positron Beams

Dr Mei Bai (Brookhaven National Lab)

2/13/14, 10:00 AM

Talk - 30 min

The discovery of Higgs has inspired the idea of dedicated higgs factory of high energy electron-­‐positron collisions. Polarization can benefit the physics program not only as an efficient energy calibration, but lso suppress background signals. The experience from high energy electron beams at HERA and LEP has been encouraging, yet also exhibits the great difficulty. The aspect of reaching...