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Title: Final construction of the C.R.E.O.L. 8 millimeter period hybrid undulator

Abstract

The construction of an 8 millimeter period hybrid undulator for the C.R.E.O.L. high power far-infared free electron laser has just been completed. This FEL is expected to come on-line in the fall of 1995 and produce close to a kilowatt of continuous power at wavelengths of 225 - 800 microns. The undulator has extremely precise mechanical tolerances and high field uniformity allowing for high electron beam recovery rates. Almost complete beam recovery is required for DC operation at high currents. A novel method for measuring the magnetic properties of individual magnets and sorting the magnets to reduce magnetic field errors will be reported. The peak field and phase errors of the undulator without the pole pieces are reduced through a magnet ordering procedure. These errors are further reduced by inserting and tuning adjustable pole pieces. The reduction of field errors through these two techniques will be presented. An analysis of the final undulator errors and the results of measurements of the mechanical tolerances will be presented.

Authors:
; ;  [1]
  1. Center for Research and Education in Optics and Lasers, Orlando, FL (United States)
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (United States)
OSTI Identifier:
238645
Report Number(s):
BNL-61982-Absts.; CONF-9508156-Absts.
ON: DE96002729; TRN: 96:013134
Resource Type:
Conference
Resource Relation:
Conference: 17. international free electron laser conference, New York, NY (United States), 21-25 Aug 1995; Other Information: PBD: [1995]; Related Information: Is Part Of 17th international free electron laser conference and 2nd international FEL users` workshop. Program and abstracts; PB: 300 p.
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; FREE ELECTRON LASERS; WIGGLER MAGNETS; CONSTRUCTION; INFRARED RADIATION; MAGNETIC FIELDS

Citation Formats

Tesch, P, Gallagher, J, and Elias, L. Final construction of the C.R.E.O.L. 8 millimeter period hybrid undulator. United States: N. p., 1995. Web.
Tesch, P, Gallagher, J, & Elias, L. Final construction of the C.R.E.O.L. 8 millimeter period hybrid undulator. United States.
Tesch, P, Gallagher, J, and Elias, L. Sun . "Final construction of the C.R.E.O.L. 8 millimeter period hybrid undulator". United States. https://www.osti.gov/servlets/purl/238645.
@article{osti_238645,
title = {Final construction of the C.R.E.O.L. 8 millimeter period hybrid undulator},
author = {Tesch, P and Gallagher, J and Elias, L},
abstractNote = {The construction of an 8 millimeter period hybrid undulator for the C.R.E.O.L. high power far-infared free electron laser has just been completed. This FEL is expected to come on-line in the fall of 1995 and produce close to a kilowatt of continuous power at wavelengths of 225 - 800 microns. The undulator has extremely precise mechanical tolerances and high field uniformity allowing for high electron beam recovery rates. Almost complete beam recovery is required for DC operation at high currents. A novel method for measuring the magnetic properties of individual magnets and sorting the magnets to reduce magnetic field errors will be reported. The peak field and phase errors of the undulator without the pole pieces are reduced through a magnet ordering procedure. These errors are further reduced by inserting and tuning adjustable pole pieces. The reduction of field errors through these two techniques will be presented. An analysis of the final undulator errors and the results of measurements of the mechanical tolerances will be presented.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
Other availability
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