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Title: The Jefferson Lab High Power THz User Facility

Abstract

We describe here, a high power (100 Watt average, 10 MW peak) broadband THz facility based on emission from sub-picosecond bunches of relativistic electrons and the beam transport system that delivers this beam in to a user laboratory.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
917550
Report Number(s):
JLAB-ACT-07-693; DOE/OR/23177-0167
TRN: US0805020
DOE Contract Number:
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: SRI 2007, Baton Rouge, La, April 25-27, 2007
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CEBAF ACCELERATOR; ACCELERATOR FACILITIES; BEAM TRANSPORT; ELECTRON BEAMS; DESIGN

Citation Formats

John Klopf, Amelia Greer, Joseph Gubeli, George Neil, Michelle D. Shinn, Timothy Siggins, David W. Waldman, Gwyn Williams, Alan Todd, Vincent Christina, and Oleg Chubar. The Jefferson Lab High Power THz User Facility. United States: N. p., 2007. Web.
John Klopf, Amelia Greer, Joseph Gubeli, George Neil, Michelle D. Shinn, Timothy Siggins, David W. Waldman, Gwyn Williams, Alan Todd, Vincent Christina, & Oleg Chubar. The Jefferson Lab High Power THz User Facility. United States.
John Klopf, Amelia Greer, Joseph Gubeli, George Neil, Michelle D. Shinn, Timothy Siggins, David W. Waldman, Gwyn Williams, Alan Todd, Vincent Christina, and Oleg Chubar. Fri . "The Jefferson Lab High Power THz User Facility". United States. doi:. https://www.osti.gov/servlets/purl/917550.
@article{osti_917550,
title = {The Jefferson Lab High Power THz User Facility},
author = {John Klopf and Amelia Greer and Joseph Gubeli and George Neil and Michelle D. Shinn and Timothy Siggins and David W. Waldman and Gwyn Williams and Alan Todd and Vincent Christina and Oleg Chubar},
abstractNote = {We describe here, a high power (100 Watt average, 10 MW peak) broadband THz facility based on emission from sub-picosecond bunches of relativistic electrons and the beam transport system that delivers this beam in to a user laboratory.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 27 00:00:00 EDT 2007},
month = {Fri Apr 27 00:00:00 EDT 2007}
}

Conference:
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  • We report the production of high power (20 watts average, {approx}1 Megawatt peak) broadband THz light based on coherent emission from relativistic electrons. We describe the source, presenting theoretical calculations and their experimental verification. For clarity we compare this source with one based on ultrafast laser techniques, and in fact the radiation has qualities closely analogous to that produced by such sources, namely that it is spatially coherent, and comprises short duration pulses with transform-limited spectral content. In contrast to conventional THz radiation, however, the intensity is many orders of magnitude greater due to the relativistic enhancement.
  • We report the production of high power (20 watts average, {approx};1 Megawatt peak) broadband THz light based on coherent emission from relativistic electrons. We describe the source, presenting theoretical calculations and their experimental verification. For clarity we compare this source with one based on ultrafast laser techniques, and in fact the radiation has qualities closely analogous to that produced by such sources, namely that it is spatially coherent, and comprises short duration pulses with transform-limited spectral content. In contrast to conventional THz radiation, however, the intensity is many orders of magnitude greater due to the relativistic enhancement.
  • We report the evolution of the high power THz source program at Jefferson Lab. The source is based on coherent synchrotron radiation in which short bunches of relativistic electrons radiate when traversing a dipolar magnetic field. In our first accelerator we produced 20 W of broadband THz light. Our upgraded accelerator with higher current and improved THz extraction optics will considerably enhance the output power to >100 W. In this paper we describe the source in some detail and present theoretical calculations for the upgrade.
  • Jefferson Lab is building a free-electron laser to produce tunable, continuous-wave (cw), kW-level light at 3-6 {mu}m wavelength. A superconducting accelerator will drive the laser, and a transport lattice will recirculate the beam back through the accelerator for energy recovery. Space charge in the injector and coherent synchrotron radiation in magnetic bends will be present, and the machine is instrumented to study these phenomena during commissioning. The wiggler and optical cavity are conventional; however, significant analysis and testing was needed to ensure mirror heating at 1 kW of outcoupled power would not impede performance. The FEL is being installed inmore » its own facility, and installation will be finished in Fall 1997. This paper surveys the machine, the status of its construction, and plans for its commissioning.« less
  • In this paper the current plans for the control system for Thomas Jefferson National Accelerator Facility`s (Jefferson Lab`s) Infrared Free Electron Laser (FEL) are presented. The goals for the FEL control system are fourfold: (1) to use EPICS and EPICS compatible tools, (2) to use VME and Industry Pack (IPs) interfaces for FEL specific devices such as controls and diagnostics for the drive laser, high power optics, photocathode gun and electron-beam diagnostics, (3) to migrate Continuous Electron Beam Accelerator Facility (CEBAF) technologies to VME when possible, and (4) to use CAMAC solutions for systems that duplicate CEBAF technologies such asmore » RF linacs and DC magnets. This paper will describe the software developed for FEL specific devices and provide an overview of the FEL control system.« less