J
J.C. Clark
Researcher at Lawrence Livermore National Laboratory
Publications - 19
Citations - 406
J.C. Clark is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Linear particle accelerator & Beam (structure). The author has an hindex of 7, co-authored 19 publications receiving 399 citations.
Papers
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Journal ArticleDOI
High-efficiency extraction of microwave radiation from a tapered-wiggler free-electron laser.
T. J. Orzechowski,B. R. Anderson,J.C. Clark,W.M. Fawley,AC Paul,D. Prosnitz,Ernst Ted Scharlemann,S.M. Yarema,D.B. Hopkins,Andrew M. Sessler,Jonathan Wurtele +10 more
TL;DR: The authors have substantially increased the output power and extraction efficiency of a free-electron laser operating at 34.6 GHz by tapering the wiggler magnetic field by using a taper that brought the magnetic field at the end of the wiggle down to 45% of its initial value.
Journal ArticleDOI
Electron-Beam Guiding and Phase-Mix Damping by an Electrostatically Charged Wire
D. S. Prono,George J Caporaso,A. G. Cole,Richard Briggs,Y.P. Chong,J.C. Clark,R. E. Hester,E.J. Lauer,R. L. Spoerlein,K. W. Struve +9 more
TL;DR: In this paper, a simple and relatively simple method was developed to focus and guide electron beams without the use of a magnetic field, which relies on the electrostatic charging of a highly resistive wire in the presence of a beam.
Design and Initial Operation of the ETA-II Induction Accelerator
J.C. Clark,F.Coffield,F.J. Deadrick,M.A. Newton,W.Nexsen,D.Prono,D. Ravenscroft,A.L. Throop,W.C. Turner,K.Whitham +9 more
Journal ArticleDOI
The ETA-II induction linac as a high-average-power FEL driver☆
W.E. Nexsen,D.P. Atkinson,D.M. Barrett,Y.-J. Chen,J.C. Clark,L. V. Griffith,H. C. Kirbie,M.A. Newton,A.C. Paul,Stephen Sampayan,A.L. Throop,W.C. Turner +11 more
TL;DR: The Experimental Test Accelerator II (ETA-II) as discussed by the authors is the first induction linac designed specifically to FEL requirements and is used to drive a 140 and 250 GHz microwave FEL for plasma heating experiments at LLNL.
Proceedings ArticleDOI
The ETA-II Induction Linac as a High-Average-Power FEL Driver
W.E. Nexsen,D.P. Atkinson,D.M. Barrett,Y.-J. Chen,J.C. Clark,L. V. Griffith,H. C. Kirbie,M.A. Newton,A.C. Paul,Stephen Sampayan,A.L. Throop,W.C. Turner +11 more
TL;DR: The Experimental Test Accelerator II (ETA-II) as discussed by the authors is the first induction linac designed specifically to FEL requirements and is used to drive a 140 and 250 GHz microwave FEL for plasma heating experiments at LLNL.