Specifications and Performance of a Chicane Magnet for the cERL IR-FEL

Nakamura, Norio; Harada, Kentaro; Higashi, Nao; Honda, Yosuke; Kato, Ryukou; Lu, Yao; Mitsuda, Chikaori; Nagahashi, Shinya; Obina, Takashi; Sakai, Hiroshi; Shimada, Miho; Takaki, Hiroyuki; Tanaka, Olga

doi:10.18429/JACoW-IPAC2021-TUPAB064

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RIS citation export for TUPAB064: Specifications and Performance of a Chicane Magnet for the cERL IR-FEL

TY  - CONF
AU  - Nakamura, N.
AU  - Harada, K.
AU  - Higashi, N.
AU  - Honda, Y.
AU  - Kato, R.
AU  - Lu, Y.
AU  - Mitsuda, C.
AU  - Nagahashi, S.
AU  - Obina, T.
AU  - Sakai, H.
AU  - Shimada, M.
AU  - Takaki, H.
AU  - Tanaka, O.A.
ED  - Liu, Lin
ED  - Byrd, John M.
ED  - Neuenschwander, Regis T.
ED  - Picoreti, Renan
ED  - Schaa, Volker R. W.
TI  - Specifications and Performance of a Chicane Magnet for the cERL IR-FEL
J2  - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021
CY  - Campinas, SP, Brazil
T2  - International Particle Accelerator Conference
T3  - 12
LA  - english
AB  - The IR-FEL was constructed in the Compact ERL (cERL) at KEK from October 2019 to May 2020 for the purpose of developing high-power mid-infrared lasers for high-efficiency laser processing utilizing molecular vibrational absorption. The chicane magnet was newly installed between two IR-FEL undulators in the cERL in order to increase the FEL gain and pulse energy by converting the energy modulation to the density modulation in an electron bunch. It consists of three dipole magnets with laminated yokes made of 0.1-mm-thick permalloy sheets and the coil currents of the three magnets are independently controlled by three power supplies with the maximum current of 10 A. The maximum closed orbit bump made by the chicane magnetic field has the longitudinal dispersion(R56) of -6 mm. The coil-current ratio of the three dipole magnets was tuned after installation to make its orbit bumps closed and then the chicane magnet was used in the FEL operation. We present specifications and operational performance of the chicane magnet.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1512
EP  - 1514
KW  - FEL
KW  - undulator
KW  - dipole
KW  - operation
KW  - operational-performance
DA  - 2021/08
PY  - 2021
SN  - 2673-5490
SN  - 978-3-95450-214-1
DO  - doi:10.18429/JACoW-IPAC2021-TUPAB064
UR  - https://jacow.org/ipac2021/papers/tupab064.pdf
ER  -