TY  - THES
AU  - Berglund, Gun Zara Mari
TI  - Spin-Orbit Maps and Electron Spin Dynamics for the Luminosity Upgrade Project at HERA
IS  - DESY-THESIS-2001-044
PB  - Kungliga Tekniska Hogskolan (KTH)
VL  - Dr.
M1  - PUBDB-2016-02302
M1  - DESY-THESIS-2001-044
SP  - 134
PY  - 2001
N1  - Kungliga Tekniska Hogskolan (KTH), Diss., 2001
AB  - HERA is the high energy electron(positron)-proton collider at Deutsches Elekt ronen-Synchrotron (DESY) in Hamburg. Following eight years of successful running, five of which were with a longitudinally spin polarized electron(positron) beam for the HERMES experiment, the rings have now been modified to increase the luminosity by a factor of about five and spin rotators have been installed for the Hl and ZEUS experiments. The modifications involve nonstandard configurations of overlapping magnetic fields and other aspects which have profound implications for the polarization. This thesis addresses the problem of calculating the polarization in the upgraded machine and the measures needed to maintain the polarization. A central topic is the construction of realistic spin-orbit transport maps for the regions of overlapping fields and their implementation in existing software. This is the first time that calculations with such fields have been possible. Using the upgraded software, calculations are presented for the polarization that can be expected in the upgraded machine and an analysis is made of the contributions to depolarization from the various parts of the machine. It is concluded that about 50 
KW  - thesis (INSPIRE)
KW  - electron p: storage ring (INSPIRE)
KW  - electron: polarized beam (INSPIRE)
KW  - positron: polarized beam (INSPIRE)
KW  - luminosity: upgrade (INSPIRE)
KW  - spin: rotator (INSPIRE)
KW  - polarization (INSPIRE)
KW  - programming (INSPIRE)
KW  - numerical calculations (INSPIRE)
KW  - DESY HERA Stor (INSPIRE)
KW  - bibliography (INSPIRE)
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)11
DO  - DOI:10.3204/DESY-THESIS-2001-044
UR  - https://bib-pubdb1.desy.de/record/300393
ER  -