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Title: Tapered helical undulator system for high efficiency energy extraction from a high brightness electron beam

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
ORCiD logo [1];  [2];  [3];  [3];  [2];  [1];  [1]; ORCiD logo [3];  [1];  [2]; ORCiD logo [4];  [1]; ORCiD logo [1];  [3];  [2];  [3]; ORCiD logo [5]; ORCiD logo [4]; ORCiD logo [3]; ORCiD logo [3] more »; ORCiD logo [1] « less
  1. Univ. of California, Los Angeles, CA (United States)
  2. RadiaBeam Technologies, LLC, Santa Monica, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. RadiaSoft, LLC, Boulder, CO (United States)
  5. Northern Illinois Univ., DeKalb, IL (United States)

In this work we discuss the design choices and construction strategy of the tapered undulator system designed for a high energy extraction efficiency experiment in the ultraviolet region of the electromagnetic spectrum planned for installation at the Argonne National Laboratory Linac Extension Area (LEA) beamline. The undulator is comprised of 4 sections pure permanent magnet Halbach array separated by short break sections, each one of them housing a focusing quadrupole doublet and a phase shifter. The quadrupoles use a novel hybrid design which allows one to vary the gradient and match the beam transversely. Finally, the undulator tapering profile is optimized to maximize the energy conversion efficiency from a 340 MeV 1 kA beam into coherent 257.5 nm radiation taking into account the longitudinal current profile generated by the linac.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); University of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Engineering & Technology. Office of Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Programs
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; SC0017102; SC0018559; SC0018571; SC0018656; SC0021190
OSTI ID:
1869053
Journal Information:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1028; ISSN 0168-9002
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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