European Linear Collider Workshop ECFA LC2013

Session

Polarisation

15

28 May 2013, 16:30

DESY Hamburg

86. Impact of beam polarization on the LC physics potential for the staged approach

Gudrid Moortgat-Pick (University of Hamburg/DESY)

28/05/2013, 16:30

The impact of beam polarization (e- and e+) for the physics potential of a LC will be discussed and weighted with regard to the expected LHC prospects. New examples in the different physics areas will shortly be discussed. In particular the new aspect of outlining the physics potential at the different energy stages (250, 350, 500, 1000) with regard to the polarization aspects will be addressed.

140. Investigating Precision In-Situ \sqrt{s} Determination with \mu+\mu (\gamma) Events

Dr Graham Wilson (KU)

28/05/2013, 16:55

89. Towards the exact calculation of strong field effects on polarized particles at future linear colliders

Anthony Hartin (DESY)

28/05/2013, 17:15

Future linear colliders will collide very dense charge bunches which exhibit strong electromagnetic fields which noticeably affect physics processes. The most obvious example is depolarisation at the IP which is made up of a number of strong field processes and which varies from 0.22% (ILC) to 5% (CLIC). The transition probabilities of these processes are calculated using an approximation...

93. Using the spent beam at the ILC in order to understand strong field physics at the Interaction Point (IP)

Anthony Hartin (DESY)

28/05/2013, 17:35

Strong IP electromagnetic fields, being responsible for depolarisation and coherent processes among other things, will play an important role in precision physics at future linear colliders. It is possible that additional strong field effects which are still in the process of being understood may manifest themselves at the ILC and CLIC. In order to understand these effects we propose using a...

90. Challenges for Polarimetry at the ILC

Moritz Beckmann (DESY)

30/05/2013, 11:05

At the International Linear Collider (ILC), the beam polarization is planned to be measured with a yet unequaled systematic uncertainty of 0.25 % by two Compton polarimeters located 1.6 km upstream and 150m downstream of the e+e- interaction point (IP). The decisive quantity for the experiments, i.e. the luminosity-weighted average polarization, has to be determined from these measurements. A...

91. A Quartz Cherenkov Detector for Polarimetry at the ILC

Annika Vauth (DESY)

30/05/2013, 11:30

This talk describes a possible design for a quartz-based Cherenkov detector for ILC polarimetry. The construction and first test results of a prototype for such a detector will be presented.

92. A high-precision calibration system for the Compton polarimeters at the ILC

Mr Benedikt Vormwald (DESY)

30/05/2013, 11:55

94. Polarimetry for Future Linear Colliders

Burak Bilki (University of Iowa-Unknown-Unknown)

30/05/2013, 12:20

Compton polarimetry is an essential method to obtain sub - 1% accuracy in measuring the polarization of the colliding beams. It is also necessary to investigate the beam depolarization effects. With evolving technology and the availability of new detector concepts, several options for polarimeters are possible. Here we explore novel detector options for Compton polarimetry that are suitable...