TY  - CONF
AU  - Poncza, V.
AU  - Lehrach, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Search for Electric Dipole Moments at Cosy in Jülich - Spin-Tracking Simulations Using Bmad
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The observed matter-antimatter asymmetry in the universe cannot be explained by the Standard Model (SM) of particle physics. In order to resolve the matter dominance an additional CP violating phenomenon is needed. A candidate for physics beyond the SM is a non-vanishing Electric Dipole Moment (EDM) of subatomic particles. Since permanent EDMs violate parity and time reversal symmetries, they are also CP violating if the CPT -theorem is assumed. The JEDI (Jülich Electric Dipole moment Investigations) collaboration in Jülich is preparing a direct EDM measurement of protons and deuterons first at the storage ring COSY (COoler SYnchrotron) and later at a dedicated storage ring. In order to analyse the data and to disentangle the EDM signal from systematic effects spin tracking simulations are needed. Therefore a model of COSY was implemented using the software library Bmad. It includes the measured magnet misalignments of the latest survey and a simplified description of the RF-Wien Filter device that is used for the EDM measurement. The model was successfully benchmarked using analytical predictions of the spin behavior. A crucial point regarding the data analysis is the knowledge of the orientation of the invariant spin axis with vanishing EDM at the position of the RF-Wien Filter. Especially its radial component is unknown and spin tracking simulations can be used to determine this missing number. Tracking results as well as the algorithm to find the invariant spin axis will be presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 914
EP  - 917
KW  - simulation
KW  - dipole
KW  - storage-ring
KW  - experiment
KW  - alignment
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS028
UR  - http://jacow.org/ipac2019/papers/mopts028.pdf
ER  - 

TY  - CONF
AU  - Würkner, B.
AU  - Alexopoulos, A.
AU  - Barschel, C.
AU  - Bay, A.
AU  - Blanc, F.
AU  - Bravin, E.
AU  - Bregliozzi, G.
AU  - Chritin, N.
AU  - Dehning, B.
AU  - Ferro-Luzzi, M.
AU  - Gianì, S.
AU  - Giovannozzi, M.
AU  - Girard, O.
AU  - Greim, R.
AU  - Haefeli, G.J.
AU  - Hopchev, P.
AU  - Jacobsson, R.
AU  - Jensen, L.K.
AU  - Jones, O.R.
AU  - Kain, V.
AU  - Kieffer, R.
AU  - Kirn, T.
AU  - Kuonen, A.
AU  - Matev, R.
AU  - Nakada, T.
AU  - Rihl, M.N.
AU  - Salustino Guimaraes, V.
AU  - Schael, S.
AU  - Schneider, O.
AU  - Tobin, M.
AU  - Veness, R.
AU  - Vlachos, S.
AU  - Wlochal, M.
AU  - Xu, Z.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Measuring Beamsize with the LHC Beam Gas Vertex Detector
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Beam Gas Vertex detector (BGV) is an innovative beam profile monitor being developed as part of the High Luminosity LHC (HL-LHC) project at CERN. The goal is to continually measure the transverse beam size by reconstructing beam-gas interaction vertices using high precision tracking detectors. To confirm the feasibility of such a device, a demonstrator based on eight modules of scintillating fiber detectors has been constructed, installed in the LHC and operated for the past 3 years. It will be shown that using the BGV the average transverse beam size can be obtained with a statistical accuracy of better than 5µm (for a gaussian beam with a σ of 200µm). This precision is obtained with an integration time of less than one minute. In addition, the BGV measures the size of individual bunches with a statistical accuracy of better than 5% within 5 minutes. The results obtained from all the data gathered over the past 3 years will be presented and compared to measurements from other beam profile monitors. Some ideas for improvements for the final HL-LHC instrument will also be discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2680
EP  - 2683
KW  - emittance
KW  - detector
KW  - proton
KW  - injection
KW  - luminosity
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPGW084
UR  - http://jacow.org/ipac2019/papers/wepgw084.pdf
ER  -