TY  - CONF
AU  - Shu, G.
AU  - Chen, Y.
AU  - Lal, S.
AU  - Qian, H.J.
AU  - Shaker, H.
AU  - Stephan, F.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - FIRST DESIGN STUDIES OF A NC CW RF GUN FOR EUROPEAN XFEL
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - After the successful commissioning of the European XFEL in pulsed mode, continuous wave (CW) mode operation of European X-ray Free-Electron Laser (XFEL) is under considerations for future upgrade. DESY is push-ing R&D on CW electron sources. A fully superconducting CW gun is under experimental development at DESY in Hamburg, and a normal conducting (NC) CW gun is under physics design at the Photo Injector Test facility at DESY in Zeuthen (PITZ) as a backup option. A 217 MHz NC CW gun is developed from the LBNL 187 MHz VHF gun, with enhancement on both cathode gradient and gun voltage to further improve beam brightness. This paper presents the cavity RF design, multipacting (MP) simula-tions and beam dynamics studies.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1698
EP  - 1701
KW  - gun
KW  - cathode
KW  - cavity
KW  - simulation
KW  - FEL
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPRB010
UR  - http://jacow.org/ipac2019/papers/tuprb010.pdf
ER  - 

TY  - CONF
AU  - Li, X.
AU  - Boonpornprasert, P.
AU  - Chen, Y.
AU  - Good, J.D.
AU  - Groß, M.
AU  - Huck, H.
AU  - Isaev, I.I.
AU  - Koschitzki, C.
AU  - Krasilnikov, M.
AU  - Lal, S.
AU  - Lishilin, O.
AU  - Loisch, G.
AU  - Melkumyan, D.
AU  - Niemczyk, R.
AU  - Oppelt, A.
AU  - Qian, H.J.
AU  - Shaker, H.
AU  - Shu, G.
AU  - Stephan, F.
AU  - Vashchenko, G.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Design Studies of a Proof-of-Principle Experiment on THz SASE FEL at PITZ
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A free-electron laser based THz source is undergoing design studies at the Photo Injector Test facility at DESY in Zeuthen (PITZ). It is considered as a prototype for pump-probe experiments at the European XFEL, benefiting from the fact that the electron beam from the PITZ facility has an identical pulse train structure as the XFEL pulses. In the proposed proof-of-principle experiment, the electron beam (up to 4 nC bunch charge and 200 A peak current) will be accelerated to 16-22 MeV/c to generate SASE radiations in an LCLS-I undulator in the THz range between 60 and 100 µm with an expected energy of up to ~1 mJ/pulse. In this paper, we report our simulations on the optimization of the photo-injector and the design of the transport and matching beamline. Experimental investigations on the generation, characterization and matching of the high charge beam in the existing 22-m-long beamline will also be presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1713
EP  - 1716
KW  - FEL
KW  - undulator
KW  - laser
KW  - electron
KW  - experiment
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPRB018
UR  - http://jacow.org/ipac2019/papers/tuprb018.pdf
ER  - 

TY  - CONF
AU  - Groß, M.
AU  - Boonpornprasert, P.
AU  - Chen, Y.
AU  - Good, J.D.
AU  - Huck, H.
AU  - Isaev, I.I.
AU  - Koschitzki, C.
AU  - Krasilnikov, M.
AU  - Lal, S.
AU  - Li, X.
AU  - Lishilin, O.
AU  - Loisch, G.
AU  - Melkumyan, D.
AU  - Mohanty, S.K.
AU  - Niemczyk, R.
AU  - Oppelt, A.
AU  - Qian, H.J.
AU  - Shaker, H.
AU  - Shu, G.
AU  - Stephan, F.
AU  - Vashchenko, G.
AU  - Will, I.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Emittance Reduction of RF Photoinjector Generated Electron Beams By Transverse Laser Beam Shaping
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Laser pulse shaping is one of the key elements to generate low emittance electron beams with RF photoinjectors. Ultimately high performance can be achieved with ellipsoidal laser pulses, but 3-dimensional shaping is challenging. High beam quality can also be reached by simple transverse pulse shaping, which has demonstrated improved beam emittance compared to a transversely uniform laser in the ‘pancake’ photoemission regime. In this contribution we present the truncation of a Gaussian laser at a radius of approximately one σ in the intermediate (electron bunch length directly after emission about the same as radius) photoemission regime with high acceleration gradients (up to 60 MV/m). This type of electron bunch is used e.g. at the European XFEL and FLASH free electron lasers at DESY, Hamburg site and is being investigated in detail at the Photoinjector Test facility at DESY in Zeuthen (PITZ). Here we present ray-tracing simulations and experimental data of a laser beamline upgrade enabling variable transverse truncation. Initial projected emittance measurements taken with help of this setup are shown, as well as supporting beam dynamics simulations. Additional simulations show the potential for substantial reduction of slice emittance at PITZ.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1958
EP  - 1960
KW  - laser
KW  - emittance
KW  - simulation
KW  - cathode
KW  - experiment
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS012
UR  - http://jacow.org/ipac2019/papers/tupts012.pdf
ER  - 

TY  - CONF
AU  - Huang, P.W.
AU  - Chen, Y.
AU  - Filippetto, D.
AU  - Good, J.D.
AU  - Groß, M.
AU  - Isaev, I.I.
AU  - Koschitzki, C.
AU  - Krasilnikov, M.
AU  - Lal, S.
AU  - Li, X.
AU  - Lishilin, O.
AU  - Melkumyan, D.
AU  - Niemczyk, R.
AU  - Oppelt, A.
AU  - Qian, H.J.
AU  - Sannibale, F.
AU  - Shaker, H.
AU  - Stephan, F.
AU  - Tang, C.-X.
AU  - Vashchenko, G.
AU  - Wan, W.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - SINGLE SHOT CATHODE TRANSVERSE MOMENTUM IMAGING IN PHOTOINJECTORS
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - In state of the art photoinjector electron sources, cathode performance determines the lower limit of achievable beam emittance. Measuring the thermal emittance at the photocathodes in electron guns is of vital importance for improving the injectors. Traditional methods, like solenoid scan, pepper-pot, need multi-shots and are time-consuming, therefore suffer from machine stability. Here we propose a new method, named cathode transverse momentum imaging. By tuning the gun solenoid focusing, the electrons’ transverse momentum at the cathode is imaged to a downstream screen, which enables a single shot measurement. Several experiments have been done at the Photo Injector Test Facility at DESY in Zeuthen (PITZ) with a Cs2Te cathode. Measurements of cathode transverse momentum, the corresponding spectra, cathode transverse momentum map and its correlation with surface electric field are presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1964
EP  - 1967
KW  - cathode
KW  - solenoid
KW  - emittance
KW  - electron
KW  - simulation
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS014
UR  - http://jacow.org/ipac2019/papers/tupts014.pdf
ER  - 

TY  - CONF
AU  - Sertore, D.
AU  - Guerini Rocco, G.
AU  - Michelato, P.
AU  - Mohanty, S.K.
AU  - Monaco, L.
AU  - Pagani, C.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Photocathode Activities at INFN LASA
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - We present the activity on alkali antimonide photocathodes at INFN LASA. The long term goal is to transfer to these photocathodes the know-how acquired in the successful development of cesium telluride photocathodes, nowadays used in many leading FEL facilities and accelerator complex. In this paper we present and discuss the results so far obtained on alkali antimonide films grown in our R&D system and the status of the new preparation system specifically designed for these sensitive materials.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2203
EP  - 2206
KW  - cathode
KW  - operation
KW  - electron
KW  - laser
KW  - gun
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS117
UR  - http://jacow.org/ipac2019/papers/tupts117.pdf
ER  - 

TY  - CONF
AU  - Loisch, G.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - High Transformer Ratio Plasma Wakefield Acceleration Driven by Photocathode Laser Shaped Electron Bunches
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Beam driven wakefield acceleration (PWFA) schemes in plasmas are among the most promising candidates for novel, compact accelerators. Several aspects of PWFA are under investigation at the Photoinjector Test facility at DESY in Zeuthen (PITZ). One of the main characteristics of these accelerators is the ratio between field strength usable for acceleration and decelerating field strength in the driver bunch, the so called transformer ratio. To reach high transformer ratios usually shaped bunches, e.g. with ramped current profiles are employed as drivers. The so-called self-modulation instability, which causes transverse modulation of a bunch longer than the plasma wavelength, is proposed as a means of supplying short driver bunches for proton-driven PWFA. This talk will give an overview on experimental results in these two aspects of PWFA at PITZ with a focus on the production of electron bunches enabling high transformer ratio acceleration by shaping the photocathode laser pulses of a photoinjector and the demonstration of high transformer ratio PWFA. Simulations and further developments on the shaping techniques, allowing highly flexible electron bunches for future plasma wakefield accelerators are also presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2286
EP  - 2290
KW  - plasma
KW  - wakefield
KW  - laser
KW  - acceleration
KW  - experiment
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEZPLS2
UR  - http://jacow.org/ipac2019/papers/wezpls2.pdf
ER  - 

TY  - CONF
AU  - Nghiem, P.A.P.
AU  - Alesini, D.
AU  - Aschikhin, A.
AU  - Audet, T.
AU  - Aßmann, R.W.
AU  - Beck, A.
AU  - Chancé, A.
AU  - Chen, M.
AU  - Chiadroni, E.
AU  - Cianchi, A.
AU  - Clarke, J.A.
AU  - Couprie, M.-E.
AU  - Croia, M.
AU  - Cros, B.
AU  - Dattoli, G.
AU  - Del Dotto, A.
AU  - Delerue, N.
AU  - Dorda, U.
AU  - Ferran Pousa, A.
AU  - Ferrario, M.
AU  - Fonseca, R.A.
AU  - Ghaith, A.
AU  - Giribono, A.
AU  - Gizzi, L.A.
AU  - Helm, A.
AU  - Hidding, B.
AU  - Hooker, S.M.
AU  - Ibison, M.G.
AU  - Jaroszynski, D.A.
AU  - Kruchinin, K.O.
AU  - Labate, L.
AU  - Lee, P.
AU  - Li, F.Y.
AU  - Li, X.
AU  - Libov, V.
AU  - Marchetti, B.
AU  - Martinez de la Ossa, A.
AU  - Marx, D.
AU  - Massimo, F.
AU  - Mathieu, F.
AU  - Maynard, G.
AU  - Mazzotta, Z.
AU  - Mehrling, T.J.
AU  - Molodozhentsev, A.Y.
AU  - Mosnier, A.
AU  - Mostacci, A.
AU  - Najmudin, Z.
AU  - Nguyen, F.
AU  - Niknejadi, P.
AU  - Oumbarek Espinos, D.
AU  - Pattathil, R.
AU  - Pompili, R.
AU  - Romeo, S.
AU  - Rossi, A.R.
AU  - Schaper, L.
AU  - Sheng, Z.M.
AU  - Shpakov, V.
AU  - Silva, L.O.
AU  - Silva, T.
AU  - Simon, C.
AU  - Specka, A.
AU  - Stella, A.
AU  - Streeter, M.J.V.
AU  - Svystun, E.N.
AU  - Symes, D.
AU  - Terzani, D.
AU  - Toci, G.
AU  - Tomassini, P.
AU  - Vaccarezza, C.
AU  - Vieira, J.M.
AU  - Vujanovic, M.
AU  - Walczak, R.
AU  - Walker, P.A.
AU  - Weikum, M.K.
AU  - Welsch, C.P.
AU  - Weng, S.M.
AU  - Wiggins, S.M.
AU  - Wolfenden, J.
AU  - Yoffe, S.
AU  - Zhu, J.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - EuPRAXIA, a Step Toward a Plasma-Wakefield Based Accelerator With High Beam Quality
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The EuPRAXIA project aims at designing the world’s first accelerator based on plasma-wakefield advanced technique, which can deliver a 5 GeV electron beam with simultaneously high charge, low emittance and low energy spread to user’s communities. Such challenging objectives can only have a chance to be achieved when particular efforts are dedicated to identify the subsequent issues and to find the way to solve them. Many injection/acceleration schemes and techniques have been explored by means of thorough simulations in more than ten European institutes to sort out the most appropriate ones. The specific issues of high charge, high beam quality and beam extraction then transfer to the user’s applications, have been tackled with many innovative approaches*. This article highlights the different advanced methods that have been employed by the EuPRAXIA collaboration and the preliminary results obtained. The needs in terms of laser and plasma parameters for such an accelerator are also summarized.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2291
EP  - 2295
KW  - plasma
KW  - laser
KW  - injection
KW  - acceleration
KW  - emittance
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEZZPLS2
UR  - http://jacow.org/ipac2019/papers/wezzpls2.pdf
ER  - 

TY  - CONF
AU  - Lal, S.
AU  - Chen, Y.
AU  - Paramonov, V.V.
AU  - Qian, H.J.
AU  - Shaker, H.
AU  - Shu, G.
AU  - Stephan, F.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - RF Design Studies of a 1.3 GHz Normal Conducting CW Buncher for European X-FEL
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A CW upgrade of European XFEL is under consideration, and CW electron injector is under R&D at DESY. One of the injector solutions is the LCLS-II like injector based on a normal conducting CW gun and buncher. RF design of a 1.3 GHz normal conducting buncher structure with accelerating voltage of ~ 400 kV, for such a CW injector is carried out at DESY Zeuthen site. The buncher structures with different geometrical shapes and numbers of cells are studied. The designs are optimized to have higher shunt impedance, higher mode separation and lower thermal power density for CW operation. Multipacting analysis and beam dynamics simulations are also presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3109
EP  - 3111
KW  - multipactoring
KW  - simulation
KW  - impedance
KW  - coupling
KW  - cavity
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPTS012
UR  - http://jacow.org/ipac2019/papers/wepts012.pdf
ER  - 

TY  - CONF
AU  - Chen, Y.
AU  - Krasilnikov, M.
AU  - Stephan, F.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - The Cooling Effect of Beam Self-Fields on the Photocathode Surface in High Gradient RF Injectors
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The intrinsic slice emittance of the emitted electrons on the photocathode surface at each moment during the transient photoemission process depends on the transverse size of the slice and the mean kinetic energy of the electrons within the slice. The latter relies on the surface barrier potentials of the cathode material at a fixed wavelength of the incident light, and is thus significantly influenced by the presence of strong rf and beam self-fields at / close to the cathode surface. This is, in particular, the case in high brightness injectors for modern free electron lasers. In this article, the beam self-fields are determined in a self-consistent approach, based on which improved transverse and temporal emission distributions are obtained. The nonlinear correlations of the intrinsic surface slice emittance within the bunch are shown for multiple bunch charges. A peak to peak variation of the intrinsic surface emittance is estimated as 30\% for the highest charge-density case considered in this paper. An overall reduction of the average intrinsic emittance is computed as 10\% accordingly. The cooling effect on the cathode surface is enhanced as the local space-charge density rises. Furthermore, the impacts of the cooling effect on downstream beam qualities are demonstrated through particle tracking simulations based on the injector setup at the Photo Injector Test Facility at DESY in Zeuthen (PITZ).
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3112
EP  - 3115
KW  - cathode
KW  - emittance
KW  - laser
KW  - electron
KW  - space-charge
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPTS013
UR  - http://jacow.org/ipac2019/papers/wepts013.pdf
ER  - 

TY  - CONF
AU  - Chancé, A.
AU  - Li, X.
AU  - Nghiem, P.A.P.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Avoiding Emittance Degradation When Transferring the Beam From and to a Plasma-Wakefield Stage
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The plasma-wakefield acceleration technique is known to provide a very strong accelerating gradient (GV/m), up to three orders of magnitude higher than the conventional RF acceleration technique. The drawback is a relatively higher energy spread and especially a huge beam divergence at the plasma exit, leading to an irremediable and strong emittance degradation right after its extraction from the plasma for transferring it to an application or another plasma stage. In this article, we determine the criteria to be achieved so as to minimize this emittance growth after pointing out all the parameters involved in its mechanism. Then the plasma down ramp profile is studied in a typical configuration of the EuPRAXIA project at 5 GeV. It turns out that no specific profile is needed. For minimizing emittance growth at beam extraction, it is enough to optimize the ramp length so that the Twiss parameter γ is minimized. Finally the design of an optimal transfer line allows showing that the emittance growth can be contained to less than 10% in realistic conditions when transferring the beam to a free electron laser.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3594
EP  - 3597
KW  - emittance
KW  - plasma
KW  - acceleration
KW  - focusing
KW  - quadrupole
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPGW006
UR  - http://jacow.org/ipac2019/papers/thpgw006.pdf
ER  - 

TY  - CONF
AU  - Lishilin, O.
AU  - Brinkmann, R.
AU  - Chen, Y.
AU  - Good, J.D.
AU  - Groß, M.
AU  - Grüner, F.J.
AU  - Isaev, I.I.
AU  - Koschitzki, C.
AU  - Krasilnikov, M.
AU  - Loisch, G.
AU  - Martinez de la Ossa, A.
AU  - Mehrling, T.J.
AU  - Melkumyan, D.
AU  - Niemczyk, R.
AU  - Oppelt, A.
AU  - Osterhoff, J.
AU  - Qian, H.J.
AU  - Schroeder, C.B.
AU  - Stephan, F.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Overview and Prospects of Plasma Wakefield Acceleration Experiments at PITZ
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Photo Injector Test Facility at DESY in Zeuthen (PITZ) carries out studies of beam-driven plasma wakefield acceleration (PWFA). The facility possesses a flexible photocathode laser beam shaping system and a variety of diagnostics including a high-resolution dipole spectrometer and an rf deflector which enables the observation of the longitudinal phase space of electron beams after their passage through a plasma. Two plasma sources are available: a gas discharge plasma cell and a photoionized lithium vapor plasma cell. Studies at PITZ include investigations of the self-modulation instability of long electron beams and the high transformer ratio, i.e., the ratio between the maximum accelerating field behind the drive beam and the decelerating field within the beam. This overview includes the experimental results and plans for future experiments.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3612
EP  - 3615
KW  - plasma
KW  - electron
KW  - wakefield
KW  - laser
KW  - experiment
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPGW016
UR  - http://jacow.org/ipac2019/papers/thpgw016.pdf
ER  - 

TY  - CONF
AU  - Lishilin, O.
AU  - Brinkmann, R.
AU  - Chen, Y.
AU  - Good, J.D.
AU  - Groß, M.
AU  - Grüner, F.J.
AU  - Isaev, I.I.
AU  - Koschitzki, C.
AU  - Krasilnikov, M.
AU  - Loisch, G.
AU  - Martinez de la Ossa, A.
AU  - Mehrling, T.J.
AU  - Oppelt, A.
AU  - Osterhoff, J.
AU  - Qian, H.J.
AU  - Schroeder, C.B.
AU  - Stephan, F.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Self-Modulation Instability of Electron Beams in Plasma Channels of Variable Length
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The self-modulation instability (SMI) of long (in respect to the plasma wavelength) charged particle beams passing through plasma enables the use of currently existing high energy charged particle beams as drivers for plasma wakefield accelerators. At the Photo Injector Test facility at DESY in Zeuthen (PITZ) the SMI of electron beams is studied *, **. An enhanced experimental setup includes a plasma channel of variable length which allows to investigate in details the development stages of the SMI by measuring the instability growth rate and phase velocity as a function of propagation distance in the plasma. In this contribution we present the experimental setup improvements, first measurement results and supporting beam dynamics simulations.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3616
EP  - 3618
KW  - plasma
KW  - wakefield
KW  - simulation
KW  - laser
KW  - electron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPGW017
UR  - http://jacow.org/ipac2019/papers/thpgw017.pdf
ER  - 

TY  - CONF
AU  - Weikum, M.K.
AU  - Akhter, T.
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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  -