2011 Particle Accelerator Conference - List of Authors (Wu, J.)

Paper	Title	Page
THP146	Preliminary Study of Terahertz Free-Electron Laser Oscillator Based on Electrostatic Accelerator	2393
	A.L. Wu, Q.K. Jia USTC/NSRL, Hefei, Anhui, People's Republic of China F. Wang, J. Wu SLAC, Menlo Park, California, USA
	Since the terahertz radiation sources provide wide applications in medical, industrial and material science, a compact, wavelength tunable and high-power THz source attracted much attention in many laboratories. In this paper, we give a primary study of a compact THz FEL based on electrostatic accelerator and the choice of basic design parameters is presented. The feasibility study is carried out using FELO codes. It is proved that FEL utilizing electrostatic accelerators (EA-FEL) will be a promising compact and powerful terahertz source.

THP168	FEL Beam Stability in the LCLS*	2423
	J.L. Turner, R. Akre, A. Brachmann, F.-J. Decker, Y.T. Ding, P. Emma, Y. Feng, A.S. Fisher, J.C. Frisch, A. Gilevich, P. Hering, K. Horovitz, Z. Huang, R.H. Iverson, D. Kharakh, A. Krasnykh, J. Krzywinski, H. Loos, M. Messerschmidt, S.P. Moeller, H.-D. Nuhn, D.F. Ratner, T.J. Smith, J.J. Welch, J. Wu SLAC, Menlo Park, California, USA
	Funding: *This work was supported by U.S. Department of Energy, Office of Basic Energy Sciences, under Contract DE-AC02-76SF00515 During commissioning and operation of the Linac Coherent Light Source (LCLS) x-ray Free Electron Laser (FEL) at the SLAC National Accelerator Center electron and x-ray beam size, shape, centroid motion have been studied. The studies, sources, and remediation are summarized in this paper.

THP184	Tuning of the LCLS Linac for User Operation	2462
	H. Loos, R. Akre, A. Brachmann, F.-J. Decker, Y.T. Ding, P. Emma, A.S. Fisher, J.C. Frisch, A. Gilevich, P. Hering, Z. Huang, R.H. Iverson, N. Lipkowitz, H.-D. Nuhn, D.F. Ratner, J.A. Rzepiela, T.J. Smith, J.L. Turner, J.J. Welch, W.E. White, J. Wu, G. Yocky SLAC, Menlo Park, California, USA
	Funding: This work was supported by U.S. Department of Energy, Office of Basic Energy Sciences, under Contract DE-AC02-76SF00515. With the Linac Coherent Light Source (LCLS) now in its third user run, reliable electron beam delivery at various beam energies and charge levels has become of high operational importance. In order to reduce the beam tuning time required for such changes, several diagnostics and feed-forward procedures have been implemented. We report on improved lattice diagnostics to detect magnet, model, and diagnostics errors as well as on measurements of transverse RF kicks and static field contributions and corresponding correction procedures to facilitate beam energy changes.

Paper

Title

Page

Preliminary Study of Terahertz Free-Electron Laser Oscillator Based on Electrostatic Accelerator

2393

A.L. Wu, Q.K. Jia
USTC/NSRL, Hefei, Anhui, People's Republic of China
F. Wang, J. Wu
SLAC, Menlo Park, California, USA

Since the terahertz radiation sources provide wide applications in medical, industrial and material science, a compact, wavelength tunable and high-power THz source attracted much attention in many laboratories. In this paper, we give a primary study of a compact THz FEL based on electrostatic accelerator and the choice of basic design parameters is presented. The feasibility study is carried out using FELO codes. It is proved that FEL utilizing electrostatic accelerators (EA-FEL) will be a promising compact and powerful terahertz source.

THP168

FEL Beam Stability in the LCLS*

2423

J.L. Turner, R. Akre, A. Brachmann, F.-J. Decker, Y.T. Ding, P. Emma, Y. Feng, A.S. Fisher, J.C. Frisch, A. Gilevich, P. Hering, K. Horovitz, Z. Huang, R.H. Iverson, D. Kharakh, A. Krasnykh, J. Krzywinski, H. Loos, M. Messerschmidt, S.P. Moeller, H.-D. Nuhn, D.F. Ratner, T.J. Smith, J.J. Welch, J. Wu
SLAC, Menlo Park, California, USA

Funding: *This work was supported by U.S. Department of Energy, Office of Basic Energy Sciences, under Contract DE-AC02-76SF00515
During commissioning and operation of the Linac Coherent Light Source (LCLS) x-ray Free Electron Laser (FEL) at the SLAC National Accelerator Center electron and x-ray beam size, shape, centroid motion have been studied. The studies, sources, and remediation are summarized in this paper.

THP184

Tuning of the LCLS Linac for User Operation

2462

H. Loos, R. Akre, A. Brachmann, F.-J. Decker, Y.T. Ding, P. Emma, A.S. Fisher, J.C. Frisch, A. Gilevich, P. Hering, Z. Huang, R.H. Iverson, N. Lipkowitz, H.-D. Nuhn, D.F. Ratner, J.A. Rzepiela, T.J. Smith, J.L. Turner, J.J. Welch, W.E. White, J. Wu, G. Yocky
SLAC, Menlo Park, California, USA

Funding: This work was supported by U.S. Department of Energy, Office of Basic Energy Sciences, under Contract DE-AC02-76SF00515.
With the Linac Coherent Light Source (LCLS) now in its third user run, reliable electron beam delivery at various beam energies and charge levels has become of high operational importance. In order to reduce the beam tuning time required for such changes, several diagnostics and feed-forward procedures have been implemented. We report on improved lattice diagnostics to detect magnet, model, and diagnostics errors as well as on measurements of transverse RF kicks and static field contributions and corresponding correction procedures to facilitate beam energy changes.