Search Results - "Whittum, D H"

Multimode Analysis of the Hollow Plasma Channel Wakefield Accelerator by Schroeder, C. B., Whittum, D. H., Wurtele, J. S.

Get full text

High-power vacuum window in WR10 by Hill, M.E., Callin, R.S., Whittum, D.H.

“…Results are presented in this paper for fabrication and test of a WR10 waveguide window for use in ultrahigh vacuum at 91.4 GHz. Low-power bench measurements…”
Get full text

Experimental studies of microwave amplification in the ion-focused regime by Whittum, D.H., Ebihara, K., Hiramatsu, S., Kishiro, J.-i., Monaka, T., Ozaki, T., Takayama, K.

“…Studies of microwave amplification with an in-focused electron beam drawn from an induction injector are reported. A free-electron laser (FEL) operating at 9.4…”
Get full text

High-gradient millimeter-wave accelerator on a planar dielectric substrate by Hill, M E, Adolphsen, C, Baumgartner, W, Callin, R S, Lin, X E, Seidel, M, Slaton, T, Whittum, D H

“…We report the first high-gradient studies of a millimeter-wave accelerator, employing for the first time a planar dielectric accelerator, powered by means of a…”
Get full text

Electron-hose instability in the ion-focused regime by WHITTUM, D. H, SHARP, W. M, YU, S. S, LAMPE, M, JOYCE, G

“…A relativistic electron beam propagating through an unmagnetized, underdense plasma exhibits a transverse instability due to the coupling of the beam centroid…”
Get full text

Ion-channel laser by WHITTUM, D. H, SESSLER, A. M, DAWSON, J. M

“…A relativistic electron beam propagating through a plasma in the ion- focused regime exhibits an electromagnetic instability with peak growth rate near a…”
Get full text

High-power squeeze-type phase shifter at W-band by Hill, M.E., Callin, R.S., Seidel, M., Whittum, D.H.

“…We describe the design, fabrication, and bench study of a millimeter-wave phase shifter employed as a high-power recirculator for a traveling-wave resonator…”
Get full text

Beam-cavity interaction circuit at W-band by Hill, M.E., Fowkes, W.R., Lin, X.E., Whittum, D.H.

“…In this paper, we describe the design, fabrication, and bench study of a millimeter-wave cavity employed as a relativistic klystron output structure. The…”
Get full text

Radio-frequency beam conditioner for fast-wave free-electron generators of coherent radiation by SESSLER, A. M, WHITTUM, D. H, YU, L.-H

“…A method for conditioning electron beams is proposed to enhance gain in resonant electron-beam devices by introducing a correlation between betatron amplitude…”
Get full text

Absolute beam position measurement in an accelerator structure by Seidel, M., Adolphsen, C., Bane, K.L.F., Jones, R.M., Kroll, N.M., Miller, R.H., Whittum, D.H.

“…High gradient acceleration requires exquisite control of beam position relative to the accelerating structure electrical center in order to avoid the…”
Get full text

Theoretical studies of the ion-hose instability in a plasma-focused free-electron laser by Whittum, D.H., Hiramatsu, S., Kim, J.-S.

“…An 'ion-focused' relativistic electron beam traversing a magnetic wiggler is subject to a transverse two-steam or 'in-hose' instability, resulting from the…”
Get full text

Flute instability of an ion-focused slab electron beam in a broad plasma by WHITTUM, D. H, LAMPE, M, JOYCE, G, SLINKER, S. P, YU, S. S, SHARP, W. M

“…An intense relativistic electron beam with an elongated cross section, propagating in the ion-focused regime through a broad, uniform, unmagnetized plasma, is…”
Get full text

An induction linac and pulse power system at KEK by Kishiro, J., Ebihara, K., Hiramatsu, S., Kimura, Y., Ozaki, T., Takayama, K., Whittum, D.H., Saito, K.

“…A R&D program on a free electron laser(FEL) in the microwave regime is currently in progress at KEK, intending to investigate the feasibility of an FEL as a…”
Get full text

Multi-bunch beam-break-up studies for a SWFEL/TBA by Kim, J.S., Henke, H., Sessler, A.M., Whittum, D.H.

“…A set of parameters minimizing BBU is obtained for a high current, low energy "drive beam" in a standing wave free electron laser two-beam…”
Get full text

Impedance formalism for an arbitrary cumulative instability by Yu, X.T., Wurtele, J.S., Whittum, D.H.

“…A formalism is developed for the analysis of collective instabilities in standing-wave systems. The analysis permits a unified treatment of the coupled-cavity…”
Get full text

Theoretical studies of the ion-hose instability in a plasma-focused free-electron laser : Generation of coherent radiation using plasmas by WHITTUM, D. H, HIRAMATSU, S, JIN-SOO KIM

Get full text

Experimental studies of microwave amplification in the ion-focused regime : Generation of coherent radiation using plasmas by WHITTUM, D. H, EBIHARA, K, HIRAMATSU, S, KISHIRO, J, OZAKI, T, TAKAYAMA, K

Get full text

A Resonant Cavity for Single-Shot Emittance Measurement by Kim, J. S, Nantista, C. D, Whittum, D. H, Miller, R. H, Tantawi, S. G, Weidemann, A. W

“…Conf.Proc.C0106181:1345-1347,2001 We present a non-invasive, resonant cavity based approach to beam emittance measurement of a shot-to-shot non-circular beam…”
Get full text

Asymptotic and nonlinear evolution of the electron-hose instability of a REB propagating in the ion-focused regime by Lampe, M., Joyce, G., Slinker, S. P., Whittum, D. H.

“…If a relativistic electron beam is propagated in an ion-focused regime (IFR) channel which is surrounded by a broad region of lower density plasma, a hose…”
Get full text

Transverse resistive wall instability in the two-beam accelerator by Whittum, DH, Sessler, AM, Neil, VK

Get full text