supported by

Collaborative Research Centre 16

Subnuclear Structure of Matter

D.2 Beam and spin dynamics in a fast ramping stretcher ring

W. Hillert, F. Klein

In order to increase the beam polarization and the beam intensity as well as to improve the beam quality, it is planned to perform detailed investigations of the spin and beam dynamics in the electron accelerator ELSA. These investigations are based on numerical simulations and their experimental verification, using sophisticated beam diagnostic tools which were successfully developed and installed during the last funding periods. The studies will be used to find optimized settings of the operation parameters of the accelerator.

Publications

Published and accepted papers
J.F. Schmidt, W. Hillert
„Studies on Depolarization by Spin Diffusion Caused by Synchrotron Radiation″,
IPAC 2016 Conf. Proc. (2016).
J.-P. Thiry, W. Hillert
„Lattice Matching with Elegant at ELSA″,
IPAC 2016 Conf. Proc. (2016).
D. Sauerland, W. Hillert
„Numerical and Experimental Substantiation of the Beam Transfer Function Measurements″,
IPAC 2016 Conf. Proc. (2016).
D. Proft, W. Hillert, T. Perlitius
„Implementation of a New Ramp Computation Scheme fort he Magnet Power Supplies at ELSA″,
IPAC 2016 Conf. Proc. (2016).
M.T. Switka et al.
„Single Electron Extraction at the ELSA Detector Test Beamline″,
IPAC 2016 Conf. Proc. (2016).
M.T. Switka, R. Koop, W. Hillert
„Electron Polarization Measurements at the Revised Compton Backscattering Beamline at ELSA″,
IPAC 2016 Conf. Proc. (2016).
N. Heurich et al.
„The New External Beamline for Detector Tests at ELSA″,
IPAC 2016 Conf. Proc. (2016).
H. Eberhardt et al.
„Measurement of double polarisation asymmetries in ω-photoproduction″,
Phys. Lett. B 750 (2015) 453.
V. Crede et al. [CBELSA/TAPS Collaboration]
„Photoproduction of ω mesons off the proton″,
Phys. Lett. B 749 (2015) 407.
J. Hartmann et al. [CBELSA/TAPS Collaboration]
„The polarization observables T , P , and H and their impact on γ p → p π0 multipoles″,
Phys. Lett. B 748 (2015) 212.
V. Sokhoyan et al. [CBELSA/TAPS Collaboration]
„High-statistics study of the reaction γ p → p 2π0,
Eur. Phys. J. A 51 (2015) 95.
V. Sokhoyan et al. [CBELSA/TAPS Collaboration]
„Data on Is and Ic in γ p → p π0 π0 reveal cascade decays of N(1900) via N(1520)π″,
Phys. Lett. B 746 (2015) 127.
E. Brentegani et al.
„Simulation of the Distribution of Parasitic Ions in the Potential of an Electron Beam″,
ICAP 2015 Conf. Proc. (2015) 112.
M.T. Switka, W. Hillert
„Preserving Information of the Three Spatial Electron Beam Dimensions in One Streak Camera Measurement″,
IPAC 2015 Conf. Proc. (2015) 144.
D. Sauerland, W. Hillert, A. Meseck
„Estimation of the Ion Density in Accelerators using the Beam Transfer Function Technique″,
IPAC 2015 Conf. Proc. (2015) 147.
D. Proft, W. Hillert
„A New FPGA Based Timing System at ELSA″,
IPAC 2015 Conf. Proc. (2015) 802.
J.F. Schmidt, W. Hillert
„Magnetic Field Parametrization for Efficient Spin Tracking with POLE″,
IPAC 2015 Conf. Proc. (2015) 808.
J.F. Schmidt et al.
„Measurement of Momentum Compaction Factor via Depolarizing Resonances at ELSA″,
IPAC 2015 Conf. Proc. (2015) 811.
D. Proft, W. Hillert, T. Perlitius
„Development of New Microcontroller Based Power Supply Control Units at ELSA″,
IPAC 2015 Conf. Proc. (2015) 2777.
P. H�nisch, W. Hillert, B. Neff
„Water-cooled Thin Walled Beam Pipes of the Fast Ramping Storage Ring ELSA″,
IPAC 2015 Conf. Proc. (2015) 2780.
M. Scheder et al.
„A New RF station for the ELSA Stretcher Ring″,
IPAC 2015 Conf. Proc. (2015) 2783.
A. Thiel et al. [CBELSA/TAPS Collaboration]
„Three-Body Nature of N* and Δ* Resonances from Sequential Decay Chains″,
Phys. Rev. Lett. 114, (2015) 091803.
B. Bantes et al. [BGO-OD Collaboration]
„The BGO Calorimeter of BGO-OD Experiment″,
J. Phys. Conf. Ser. 587, (2015) 012042.
F. Dietz et al. [CBELSA/TAPS Collaboration]
„Photoproduction of w mesons off protons and neutrons″,
Eur. Phys. J. A 51, (2015) 6.
D. Proft, F. Frommberger, W. Hillert
„Setup of a history storage engine based on a non-relational database at ELSA″,
PCaPAC'14 Conf. Proc., (2014) 34.
M.T. Switka et al.
„Dual transverse and longitudinal streak camera imaging at ELSA″,
IBIC 2014 Conf. Proc (2014) 144.
M. Schedler et al.
„A new high current and single bunch injector at ELSA″,
LINAC 2014 Conf. Proc. (2014) 847.
R. Ewald et al. [CBELSA/TAPS Collaboration]
„Measurement of polarisation observables in K0s Σ+ photoproduction off the proton″,
Phys. Lett. B 738, (2014) 268.
B. Bantes et al. [BGO-OD Collaboration]
„The BGO-OD Experiment at ELSA″,
Int. J. Mod. Phys. Conf. Ser. 26, (2014) 1460093.
J. Hartmann et al. [CBELSA/TAPS Collaboration]
„N(1520) 3/2- Helicity Amplitudes from an Energy-Independent Multipole Analysis Based on New Polarization Data on Photoproduction of Neutral Pions″,
Phys. Rev. Lett. 113, (2014) 062001.
S. Friedrich et al. [CBELSA/TAPS Collaboration]
„Experimental constraints on the ω�nucleus real potential″,
Phys. Lett. B 736, (2014) 26.
J.F. Schmidt et al.
„Optimizing Polarization with an Improved Integer Resonance Correction Scheme at ELSA″,
IPAC 2014 Conf. Proc. (2014) 1108.
J.-P. Thiry et al.
„High Bandwidth Closed Orbit Control for a Fast Ramping Electron Accelerator″,
IPAC 2014 Conf. Proc. (2014) 1111.
D. Sauerland et al.
„First Studies on Ion Effects in the Accelerator ELSA″,
IPAC 2014 Conf. Proc. (2014) 1585.
A. Markovik et al.
„Dynamics of Ion Distributions in Beam Guiding Magnets″,
IPAC 2014 Conf. Proc. (2014) 1668.
N. Heurich et al.
„Radiation Protection Concepts for the Beamline for Detector Tests at ELSA″,
IPAC 2014 Conf. Proc. (2014) 1799.
M. Schedler et al.
„A New Digital LLRF System for a Fast Ramping Storage Ring″,
IPAC 2014 Conf. Proc. (2014) 2418.
D. Proft, F. Frommberger, W. Hillert
„Setup of a History Storage Engine based on Hypertable at ELSA″,
IPAC 2014 Conf. Proc. (2014) 3128.
T. Schiffer et al.
„Set up of a Synchrotron Light Monitor at the 2.5 GeV Booster Synchrotron at ELSA″,
IPAC 2014 Conf. Proc. (2014) 3468.
M.T. Switka et al.
„Synchrotron Radiation Diagnostics Performance at ELSA″,
IPAC 2014 Conf. Proc. (2014) 3471.
J. Hartmann et al. [CBELSA/TAPS Collaboration]
„The N(1520) 3/2- helicity amplitudes from an energy-independent multipole analysis based on new polarization data on photoproduction of neutral pions″,
Phys. Rev. Lett. 113, (2014) 062001.
E. Gutz et al. [CBELSA/TAPS Collaboration]
„High statistics study of the reaction γp → pπ0η″,
Eur. Phys J. A 50, (2014) 74.
M. Gottschall et al. [CBELSA/TAPS Collaboration]
„First Measurement of the Helicity Asymmetry for γp → pπ0 in the Resonance Region″,
Phys. Rev. Lett. 112, (2014) 012003.
M. Nanova et al. [CBELSA/TAPS Collaboration]
„Determination of the h�-nucleus optical potential″,
Phys. Lett. B 727, (2013) 417.
M.T. Switka et al.
„Streak Camera Imaging at ELSA″,
IBIC 2013 Conf. Proc (2013) 132.
D. Proft, F. Frommberger, W. Hillert
„Overview of the ELSA Accelerator Control System″,
ICALEPCS 2013 Conf. Proc. (2013) 1396.
S. Naknaimueang et al.
„Design Studies for FLUTE, A Linac-based Source of Terahertz Radiation″,
FEL 2013 Conf. Proc. (2013) 598.
J.F. Schmidt et al.
„Simulating Spin Dynamics and Depolarization using POLE″,
IPAC 2013 Conf. Proc. (2013) 891.
D. Sauerland et al.
„Amplitude, Phase and Temperature Stabilization of the ELSA RF System″,
IPAC 2013 Conf. Proc. (2013) 2717.
D. Proft, F. Frommberger, W. Hillert
„The Accelerator Control System at ELSA″,
IPAC 2013 Conf. Proc. (2013) 3149.
D. Heiliger, W. Hillert, B. Neff
„A New Load Lock System for the Source of Polarised Electrons at ELSA″,
IPAC 2013 Conf. Proc. (2013) 294.
J.-P. Thiry et al.
„The New Orbit Correction System at ELSA″,
IPAC 2013 Conf. Proc. (2013) 479.
S. Zander et al.
„High Resolution Synchrotron Light Analysis at ELSA″,
IPAC 2013 Conf. Proc. (2013) 482.
M. Schedler et al.
„Broad and Narrow Band Feedback Systems at ELSA″,
IPAC 2013 Conf. Proc. (2013) 2714.
N. Heurich et al.
„A New External Beamline for Detector Tests″,
IPAC 2013 Conf. Proc. (2013) 3300.
A. Thiel et al. [CBELSA/TAPS Collaboration]
„Comment on ″Well-Established Nucleon Resonances Revisited by Double-Polarization Measurements″ Reply″,
Phys. Rev. Lett. 110, (2013) 169102.
V. de Leo et al.
„Recent Results of the BGO-OD Experiment at ELSA Facility″,
J. Phys. Conf. Ser. 424, (2013) 012008.
T.R. Pusch et al.
„Measuring the intensity and position of a pA electron beam with resonant cavities″,
Phys. Rev. ST Accel. Beams 15, (2012) 112801.
A. Thiel et al. [CBELSA/TAPS Collaboration]
„Well-Established Nucleon Resonances Revisited by Double-Polarization Measurements″,
Phys. Rev. Lett. 109, (2012) 102001.
R. Zimmermann et al.
„Compton Polarimetry at ELSA - First Measurements with an improved System″,
IPAC 2012 Conf. Proc. (2012).
D. Proft et al.
„The Beam Loss Monitoring System at ELSA″,
IPAC 2012 Conf. Proc. (2012).
J.-P. Thiry et al.
„Dynamic Closed Orbit Correction During the Fast Energy Ramp of ELSA″,
IPAC 2012 Conf. Proc. (2012).
S. Zander et al.
„Simultaneous Measurement of Emittance at the Storage Ring and the External Beamlines of ELSA″,
IPAC 2012 Conf. Proc. (2012).
S. Zander et al.
„A New Diagnostic Beamline at ELSA″,
IPAC 2012 Conf. Proc. (2012).
O. Boldt et al.
„How to Achieve Longitudinally Polarized Electrons using Integer Spin Tune Resonances″,
IPAC 2012 Conf. Proc. (2012).
D. Heiliger et al.
„A New Load Lock System for the Source of Polarized Electrons at ELSA″,
IPAC 2012 Conf. Proc. (2012).
M. Schedler et al.
„First Measurements with Multibunch Feedback Systems at the Fast Ramping Stretcher Ring ELSA″,
IPAC 2012 Conf. Proc. (2012).
A. Dieckmann et al.
„Fast Ramping Arbitrary Waveform Power Supplies for Correction Coils in a Circular Electron Accelerator″,
IPAC 2012 Conf. Proc. (2012).
R. Ewald et al. [CBELSA/TAPS Collaboration]
„Anomaly in the K0sΣ+ photoproduction cross section off the proton at the K* threshold″,
Phys. Let. B 713, (2012) 180.
V. Crede et al. [CBELSA/TAPS Collaboration]
„Photoproduction of neutral pions off protons″,
Phys. Rev. C 84, (2011) 055203.
O. Boldt et al.
„Spinor based calculation of depolarizing effects in circular lepton accelerators″,
IPAC 2011 Conf. Proc. (2011) 230.
D. Heiliger, W. Hillert, B. Neff
„Strongly space charge dominated beam transport at 50 keV″,
IPAC 2011 Conf. Proc. (2011) 1123.
N. Heurich et al.
„A longitudinal kicker cavity for a bunch-by-bunch feedback system at ELSA″,
IPAC 2011 Conf. Proc. (2011) 484.
W. Hillert et al.
„Crossing of depolarizing resonances in circular electron accelerators″,
IPAC 2011 Conf. Proc. (2011) 2133.
S. Mey et al.
„Verifying the single bunch capability of the new injector at ELSA″,
IPAC 2011 Conf. Proc. (2011) 1072.
A. Roth, W. Hillert
„Operation of superconducting cavities in a fast ramping electron storage ring″,
IPAC 2011 Conf. Proc. (2011) 253.
A. Roth et al.
„Commissioning of multibunch feedback systems at the fast ramping stretcher ring ELSA″,
IPAC 2011 Conf. Proc. (2011) 250.
M. Schedler et al.
„A broadband RF stripline kicker for damping transversal multibunch instabilities″,
IPAC 2011 Conf. Proc. (2011) 481.
S. Zander et al.
„Emittance variation dependence on the resonance extraction parameters at ELSA″,
IPAC 2011 Conf. Proc. (2011) 1168.
R. Zimmermann, J. Wittschen, W. Hillert
„A new counting silicon strip detector system for precise Compton polarimetry″,
IPAC 2011 Conf. Proc. (2011) 1171.
T. Pusch, F. Frommberger, W. Hillert
„Cavity based beam diagnostics at ELSA″,
DIPAC 2011 Conf. Proc. (2011) 263.
O. Bold et al.
„A new correction scheme to compensate depolarizing integer resonances at ELSA″,
PAC 2011 Conf. Proc. (2011) 1507.
S. Zander et al.
„Optical beam diagnostics at ELSA″,
PAC 2011 Conf. Proc. (2011) 408.
I. Jaegle et al. [CBELSA/TAPS Collaboration]
„Quasi-free photoproduction of η-mesons off the deuteron″,
Eur. Phys. J. A 47 (2011) 89.
W. Hillert, K. Aulenbacher
„Workshop on Sources of Polarized Leptons and High Brightness Electron Beams (PESP2010)″,
J. Phys. Conf. Ser. 298 (2011) 011001.
A. Lehrach et al.
„The polarized electron-nucleon collider project ENC at GSI/FAIR″,
J. Phys. Conf. Ser. 295 (2011) 012156.
O. Boldt et al.
„Investigation of various electron-ring concepts for the ENC with regard to depolarising effects″,
J. Phys. Conf. Ser. 295 (2011) 012157.
D. Heiliger et al.
„Upgrade of the inverted source of polarized electrons at ELSA″,
J. Phys. Conf. Ser. 298 (2011) 012003.
I. Jaegle et al. [CBELSA/TAPS Collaboration]
„Photoproduction of η'-mesons off the deuteron″,
Eur. Phys. J. A 47, (2011) 11.
N. Sparks et al. [CBELSA/TAPS Collaboration]
„Measurement of the beam asymmetry Σ in the forward direction of γp → pπ0,
Phys. Rev. C 81, (2010) 065210.
E. Gutz et al. [CBELSA/TAPS Collaboration]
„Photoproduction of meson pairs: First measurement of the polarization observable Is,
Phys. Lett. B 687, (2010) 11.
F. Klarner et al.
„Detailed studies regarding the new injection system at the LINAC I at ELSA″,
LINAC 2010 Conf. Proc. (2010) 325.
M. Eberhardt et al.
„Measurement and correction of the longitudinal and transversal tunes during the fast Energy ramp at ELSA″,
IPAC 2010 Conf. Proc. (2010) 897.
D. Heiliger et al.
„Upgrade of the 50 keV GaAs source of polarized electrons at ELSA″,
PST 2009 Conf. Proc. World Scientific, New York 2011
A. Jankowiak et al.
„Concept for a polarized electron-nucleon collider utilizing the HESR storage ring at GSI/FAIR″,
PAC 2009 Conf. Proc. (2010).
A. Balling
„Precision closed orbit correction in a fast ramping stretcher ring″,
PAC 2009 Conf. Proc. (2010).
W. Hillert, B. Aurand, J. Wittschen
„Compton Polarimetry at ELSA″,
AIP Conf. Proc. 1149 (2009) 1160.
A. Balling et al.
„Polarization upgrade at ELSA″,
AIP Conf. Proc. 1149 (2009) 809.
F. Klarner et al.
„The new single bunch injector for ELSA″,
LINAC 2008 Proc. 392 (2009).
D. Elsner et al. [CBELSA/TAPS Collaboration]
„Linearly polarised photon beams at ELSA and measurement of the beam asymmetry in π0 photoproduction off the proton″,
Eur. Phys. J. A 39 (2009) 373.
A. Balling et al.
„Machine-Mode Aware Beam Loss Monitoring″,
PCaPAC 2008 Proc. (2008) 93.
W. Hillert
„The Bonn Electron Stretcher Accelerator ELSA: Past and future″,
Eur. Phys. J. A 28 s01 (2006) 139.
M. Eberhardt et al.
„The 50 keV Source of Polarized Electrons at ELSA: Past and Future″,
AIP Conf. Proc. 915 (2006) 1031.
H. Dutz et al. [GDH Collaboration]
„Measurement of Helicity-Dependent Photoabsorption Cross Sections on the Neutron from 815 to 1825 MeV″,
Phys. Rev. Lett. 94 (2005) 162001.
H. Dutz et al. [GDH Collaboration]
„Experimental Check of the Gerasimov-Drell-Hearn Sum Rule for 1H″,
Phys. Rev. Lett. 93 (2004) 032003.