TY  - CONF
AU  - Aksentyev, A.E.
AU  - Senichev, V.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Simulation of the Guide Field Flipping Procedure for the Frequency Domain Method
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The spin vector of a particle injected into a perfectly aligned storage ring precesses about the vertically-orientated guide field. In the presence of an Electric Dipole Moment (EDM), the spin precession axis acquires a proportional radial component. However, in an imperfect ring, rotational magnet misalignments induce a radial component to the spin precession axis, related to the Magnetic Dipole Moment (MDM). In the Frequency Domain Method, [*] this additional precession is dealt with by consecutively injecting the beam in opposite directions, and constructing the EDM estimator as the sum of the clockwise and counter-clockwise vertical plane precession frequencies. Since the radial MDM component changes sign when the magnetic field direction is reversed, it cancels in the sum, leaving only the EDM effect. In order to reproduce the guide field magnitude with precision sufficient for the cancellation of the MDM effect, we propose to calibrate the guide field via the horizontal plane precession frequency. In the present work we describe the algorithm of the field flipping procedure, and do a numerical simulation.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 858
EP  - 860
KW  - GUI
KW  - lattice
KW  - simulation
KW  - sextupole
KW  - dipole
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS010
UR  - http://jacow.org/ipac2019/papers/mopts010.pdf
ER  - 

TY  - CONF
AU  - Aksentyev, A.E.
AU  - Senichev, V.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Spin Motion Perturbation Effect on the EDM Statistic in the Frequency Domain Method
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The spin precession axis of a particle involved in betatron motion precesses about the invariant spin axis defined on the closed orbit (CO). This precession can be observed in polarization data as a rapid, small-amplitude oscillation on top of the major effect oscillation caused by the precession of spin about the CO axis. The frequency of this latter oscillation is used in the Frequency Domain (FD) methodology as the EDM observable. [*] It is estimated by fitting polarimetry data by a sine function; the rapid oscillations, therefore, constitute a model specification error. This model error might introduce a bias into the frequency estimate. In the present work we investigate the effect of the spin precession axis motion on measurement data and fit quality, and conclude that it is not only insignificant (with regard to data perturbation) compared to spin tune variation, but is also controllable via the application of a Spin Wheel.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 861
EP  - 863
KW  - betatron
KW  - polarization
KW  - dipole
KW  - storage-ring
KW  - lattice
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS011
UR  - http://jacow.org/ipac2019/papers/mopts011.pdf
ER  - 

TY  - CONF
AU  - Aksentyev, A.E.
AU  - Senichev, V.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Spin Decoherence in the Frozen Spin Storage Ring Method of Search for a Particle EDM
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Spin coherence refers to a measure of preservation of polarization in an initially polarized beam. The spin vector of a particle injected into a storage ring starts to precess about the vertical magnetic field vector in accordance with the Thomas-BMT equation. The precession frequency is dependent on the equilibrium-level energy, which differs across the beam particles. This does not pose a problem when the initial polarization is vertical; however, the Frozen Spin Storage Ring EDM search method [*] requires beam polarization along the momentum vector, i.e., in the horizontal plane. In the present work we analyze the source of decoherence, and investigate the way it can be suppressed in the horizontal plane in a perfectly aligned ring by means of sextupole fields. We also consider the case of an imperfect ring: transference of decoherence into the vertical plane induced by vertical plane spin precession, and the effect of sextupole fields.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 864
EP  - 866
KW  - sextupole
KW  - storage-ring
KW  - lattice
KW  - simulation
KW  - betatron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS012
UR  - http://jacow.org/ipac2019/papers/mopts012.pdf
ER  - 

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  - Kamerdzhiev, V.
AU  - Bekman, I.
AU  - Böhme, C.
AU  - Gebel, R.
AU  - Lorentz, B.
AU  - Modic, R.
AU  - Niedermayer, P.
AU  - Oven, Ž.
AU  - Simon, M.
AU  - Thelen, M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Progress of the Machine Control Upgrade at COSY/JüLICH
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Cooler Synchrotron COSY operated at the Research Center Jülich is undergoing staged machine control upgrades driven by the requirements of the JEDI (Jülich Electric Dipole moment Investigations) collaboration. The upgrades aim towards better beam control e.g. beam orbit, tune, and chromaticity control improvements. A better orbit control was achieved through the upgrade of BPM electronics and migration from initial Tcl/Tk based control system to Control System Studio (CSS) utilizing EPICS. Currently, a design for improved beam tune control is in development. The main part of work is the transition towards a faster and less restrictive magnet control. It further includes improved tune measurement tools as well as the migration of control for quadrupole magnets to EPICS. Ultimately the control of all systems should be centralized around EPICS to enable ease of operation, automation, setup of services, etc. The decision path, technical details of the upgrade and performance of the upgraded sub-systems are presented. We also showcase how the COSY team’s physics and research goals are complemented by Cosylab’s technical design and implementation to form a synergetic collaboration.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2473
EP  - 2476
KW  - controls
KW  - EPICS
KW  - operation
KW  - experiment
KW  - quadrupole
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPGW007
UR  - http://jacow.org/ipac2019/papers/wepgw007.pdf
ER  - 

TY  - CONF
AU  - Wagner, T.
AU  - Pretz, J.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Beam-based Alignment at the Cooler Syncrotron (COSY)
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - There is a matter-antimatter asymmetry observed in the universe that can not be explained by the Standard Model of particle physics. To resolve that problem additional CP violating phenomena are needed. A candidate for an additional CP violating phenomenon is a non-vanishing Electric Dipole Moment (EDM) of subatomic particles. Since permanent EDMs violate parity and time reversal symmetries, they also violate CP if the CPT-theorem holds. The Jülich Electric Dipole moment Investigation (JEDI) Collaboration works on a direct measurement of the electric dipole moment (EDM) of protons and deuterons using a storage ring. The JEDI experiment requires a small beam orbit RMS in order to measure the EDM. Therefore an ongoing upgrade of the Cooler Syncrotron (COSY) is done in order to improve the precision of the beam position. One of part of this upgrade is to determine the magnetic center of the quadrupoles with respect to the beam position monitors. This can be done with the so called beam-based alignment method. The first results of the beam-based alignment measurement performed in February 2019 will be presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3632
EP  - 3634
KW  - quadrupole
KW  - dipole
KW  - alignment
KW  - experiment
KW  - synchrotron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPGW024
UR  - http://jacow.org/ipac2019/papers/thpgw024.pdf
ER  - 

TY  - CONF
AU  - Weikum, M.K.
AU  - Akhter, T.
AU  - Alesini, D.
AU  - Alexandrova, A.S.
AU  - Anania, M.P.
AU  - Andreev, N.E.
AU  - Andriyash, I.A.
AU  - Aschikhin, A.
AU  - Audet, T.
AU  - Aßmann, R.W.
AU  - Bacci, A.
AU  - Barna, I.F.
AU  - Beaton, A.
AU  - Beck, A.
AU  - Beluze, A.
AU  - Bernhard, A.
AU  - Bielawski, S.
AU  - Bisesto, F.G.
AU  - Brandi, F.
AU  - Brinkmann, R.
AU  - Bründermann, E.
AU  - Bussmann, M.H.
AU  - Bussolino, G.
AU  - Büscher, M.
AU  - Chancé, A.
AU  - Chen, M.
AU  - Chiadroni, E.
AU  - Cianchi, A.
AU  - Clarke, J.A.
AU  - Cole, J.
AU  - Couprie, M.-E.
AU  - Croia, M.
AU  - Cros, B.
AU  - Crump, P.A.
AU  - Dattoli, G.
AU  - De Nicola, S.
AU  - Del Dotto, A.
AU  - Delerue, N.
AU  - Dias, J.M.
AU  - Dorda, U.
AU  - Fedele, R.
AU  - Ferran Pousa, A.
AU  - Ferrario, M.
AU  - Filippi, F.
AU  - Fiore, G.
AU  - Fonseca, R.A.
AU  - Galimberti, M.
AU  - Gallo, A.
AU  - Ghaith, A.
AU  - Giove, D.
AU  - Giribono, A.
AU  - Gizzi, L.A.
AU  - Grüner, F.J.
AU  - Habib, A.F.
AU  - Haefner, C.
AU  - Heinemann, T.
AU  - Hidding, B.
AU  - Holzer, B.J.
AU  - Hooker, S.M.
AU  - Hosokai, T.
AU  - Huebner, M.
AU  - Irman, A.
AU  - Jafarinia, F.
AU  - Jaroszynski, D.A.
AU  - Joshi, C.
AU  - Kaluza, M.
AU  - Kando, M.
AU  - Karger, O.S.
AU  - Karsch, S.
AU  - Khazanov, E.
AU  - Khikhlukha, D.
AU  - Knetsch, A.
AU  - Kocon, D.
AU  - Koester, P.
AU  - Kononenko, O.S.
AU  - Korn, G.
AU  - Kostyukov, I.
AU  - Kruchinin, K.O.
AU  - Labate, L.
AU  - Le Blanc, C.
AU  - Lechner, C.
AU  - Leemans, W.
AU  - Lehrach, A.
AU  - Li, X.
AU  - Libov, V.
AU  - Lifschitz, A.
AU  - Litvinenko, V.
AU  - Lu, W.
AU  - Lundh, O.
AU  - Maier, A.R.
AU  - Malka, V.
AU  - Manahan, G.G.
AU  - Mangles, S.P.D.
AU  - Marchetti, B.
AU  - Martinez de la Ossa, A.
AU  - Martins, J.L.
AU  - Mason, P.D.
AU  - Massimo, F.
AU  - Mathieu, F.
AU  - Maynard, G.
AU  - Mazzotta, Z.
AU  - Molodozhentsev, A.Y.
AU  - Mostacci, A.
AU  - Murphy, C.D.
AU  - Müller, A.-S.
AU  - Najmudin, Z.
AU  - Nghiem, P.A.P.
AU  - Nguyen, F.
AU  - Niknejadi, P.
AU  - Osterhoff, J.
AU  - Oumbarek Espinos, D.
AU  - Papadopoulos, D.N.
AU  - Patrizi, B.
AU  - Pattathil, R.
AU  - Petrillo, V.
AU  - Pocsai, M.A.
AU  - Poder, K.
AU  - Pompili, R.
AU  - Pribyl, L.
AU  - Pugacheva, D.
AU  - Romeo, S.
AU  - Rossetti Conti, M.
AU  - Rossi, A.R.
AU  - Rossmanith, R.
AU  - Roussel, E.
AU  - Sahai, A.A.
AU  - Sarri, G.
AU  - Schaper, L.
AU  - Scherkl, P.
AU  - Schramm, U.
AU  - Schroeder, C.B.
AU  - Scifo, J.
AU  - Serafini, L.
AU  - Sheng, Z.M.
AU  - Siders, C.
AU  - Silva, L.O.
AU  - Silva, T.
AU  - Simon, C.
AU  - Sinha, U.
AU  - Specka, A.
AU  - Streeter, M.J.V.
AU  - Svystun, E.N.
AU  - Symes, D.
AU  - Szwaj, C.
AU  - Tauscher, G.E.
AU  - Terzani, D.
AU  - Thompson, N.
AU  - Toci, G.
AU  - Tomassini, P.
AU  - Torres, R.
AU  - Ullmann, D.
AU  - Vaccarezza, C.
AU  - Vannini, M.
AU  - Vieira, J.M.
AU  - Villa, F.
AU  - Wahlstrom, C.-G.
AU  - Walczak, R.
AU  - Walker, P.A.
AU  - Wang, K.
AU  - Welsch, C.P.
AU  - Wiggins, S.M.
AU  - Wolfenden, J.
AU  - Xia, G.X.
AU  - Yabashi, M.
AU  - Zhu, J.
AU  - Zigler, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Status of the Horizon 2020 EuPRAXIA Conceptual Design Study
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Horizon 2020 Project EuPRAXIA (European Plasma Research Accelerator with eXcellence In Applications) is producing a conceptual design report for a highly compact and cost-effective European facility with multi-GeV electron beams accelerated using plasmas. EuPRAXIA will be set up as a distributed Open Innovation platform with two construction sites, one with a focus on beam-driven plasma acceleration (PWFA) and another site with a focus on laser-driven plasma acceleration (LWFA). User areas at both sites will provide access to FEL pilot experiments, positron generation and acceleration, compact radiation sources, and test beams for HEP detector development. Support centres in four different countries will complement the pan-European implementation of this infrastructure.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3638
EP  - 3642
KW  - plasma
KW  - laser
KW  - electron
KW  - acceleration
KW  - site
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPGW026
UR  - http://jacow.org/ipac2019/papers/thpgw026.pdf
ER  -