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RIS citation export for WEPA44: Compact Inter-Undulator Diagnostic Assembly for TESSA-515

AU  - Hodgetts, T.J.
AU  - Agustsson, R.B.
AU  - Chen, Y.C.
AU  - Denham, P.E.
AU  - Fisher, A.C.
AU  - Jin, J.
AU  - Murokh, A.Y.
AU  - Musumeci, P.
AU  - Park, Y.
AU  - Ruelas, M.
ED  - Biedron, Sandra
ED  - Simakov, Evgenya
ED  - Milton, Stephen
ED  - Anisimov, Petr M.
ED  - Schaa, Volker R.W.
TI  - Compact Inter-Undulator Diagnostic Assembly for TESSA-515
J2  - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022
CY  - Albuquerque, NM, USA
T2  - International Particle Accelerator Conference
T3  - 5
LA  - english
AB  - Beamline space is a very expensive and highly sought-after commodity, which makes the creation of compact integrated optics and diagnostics extremely valuable. The FAST- GREENS experimental program aims at demonstrating 10 % extraction efficiency from a relativistic electron beam using four helical undulators operating in the high gain TESSA regime. The inter-undulator gap needs to be as short as possible (17 cm in the current plans) to maximize the output power. Within this short distance, we needed to fit two focusing quadrupoles, a variable strength phase shifter, a transverse profile monitor consisting of a YAG-OTR combination for co-aligning the electron beam and laser, and an ion pump. By making the quadrupoles tunable with a variable gradient, in combination with vertical displacement, we can meet the optics requirements of matching the beam transversely to the natural focusing of the undulators. The two quadrupoles in conjunction with the electromagnetic dipole also serve as a phase shifter to realign the radiation and the bunching before each undulator section. This paper will discuss the mechanical design of this inter-undulator break section and its components.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 732
EP  - 734
KW  - undulator
KW  - quadrupole
KW  - electron
KW  - radiation
KW  - diagnostics
DA  - 2022/10
PY  - 2022
SN  - 2673-7000
SN  - 978-3-95450-232-5
DO  - doi:10.18429/JACoW-NAPAC2022-WEPA44
UR  - https://jacow.org/napac2022/papers/wepa44.pdf
ER  -