Electron Beam Asymmetry Compensation with Gun Quadrupoles at PITZ

Krasilnikov, Mikhail; Amatuni, Gayane; Asova, Galina; Boonpornprasert, Prach; Chen, Ye; Good, James; Grigoryan, Bagrat; Groß, Matthias; Huck, Holger; Isaev, Igor; Kalantaryan, Davit; Li, Xin; Lishilin, Osip; Loisch, Gregor; Melkumyan, David; Oppelt, Anne; Qian, Houjun; Renier, Yves; Stephan, Frank; Zhao, Quantang

doi:10.18429/JACoW-FEL2017-WEP007

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RIS citation export for WEP007: Electron Beam Asymmetry Compensation with Gun Quadrupoles at PITZ

TY - CONF
AU - Krasilnikov, M.
AU - Amatuni, G.A.
AU - Asova, G.
AU - Boonpornprasert, P.
AU - Chen, Y.
AU - Good, J.D.
AU - Grigoryan, B.
AU - Groß, M.
AU - Huck, H.
AU - Isaev, I.I.
AU - Kalantaryan, D.K.
AU - Li, X.
AU - Lishilin, O.
AU - Loisch, G.
AU - Melkumyan, D.M.
AU - Oppelt, A.
AU - Qian, H.J.
AU - Renier, Y.
AU - Stephan, F.
AU - Zhao, Q.T.
ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X]
ED - Schaa, Volker RW
TI - Electron Beam Asymmetry Compensation with Gun Quadrupoles at PITZ
J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017
C1 - Santa Fe, NM, USA
T2 - International Free Electron Laser Conference
T3 - 38
LA - english
AB - The electron beam asymmetry observed at the Photo Injector Test Facility at DESY in Zeuthen (PITZ) was traced back to multipole kicks in the gun section, namely around the location of the coaxial power coupler and the main solenoid. Several dedicated studies have been performed to quantify the kick location and strength. Based on these studies, two designs of correction quadrupole coils were proposed. The coils were fabricated and tested with an electron beam. The second updated design implies a two quadrupole setup on a frame installed around the gun coaxial coupler close to the main solenoid centre location. Skew and normal quadrupole magnets are powered independently, enabling flexibility in electron beam manipulations. By means of this setup, a more symmetric beam was obtained at several screens. This led also to more equal measured horizontal and vertical phase spaces and to even smaller overall emittance values. Some details of the gun quadrupole designs, magnetic measurements, and results of electron beam measurements including emittance optimization will be reported.
PB - JACoW
CP - Geneva, Switzerland
SP - 429
EP - 431
KW - ion
KW - gun
KW - quadrupole
KW - electron
KW - emittance
DA - 2018/02
PY - 2018
SN - 978-3-95450-179-3
DO - 10.18429/JACoW-FEL2017-WEP007
UR - http://jacow.org/fel2017/papers/wep007.pdf
ER -