Z. Najmudin

Publication List Details

Period

1996 - 2008

Number

100

Co-Authors

Resonant Plasma Wave Growth and Monoenergetic Electron Beam Production using Collinear High-Intensity Ultrashort Laser Pulses (2008)

Thomas, A. G. R., Murphy, C. D., Mangles, S. P. D., Dangor, A. E., Foster, P., Gallagher, J. G., ...

The resonant generation of relativistic plasma waves and plasma wave guiding by two co-propagating laser pulses has been studied. By proper timing between guiding and driver pulses, a resonant...

Longitudinal Ion Acceleration from High-Intensity Laser Interactions with Underdense Plasma (2007)

Willingale, L., Mangles, S. P. D., Nilson, P. M, Clarke, R. J., Dangor, A. E., Kaluza, M. C., ...

Longitudinal ion acceleration from high-intensity (I ~ 10^20 Wcm^-2) laser interactions with helium gas jet targets (n_e ~ 0.04 n_c) have been observed. The ion beam has a maximum energy for He^2+ of...

Self-guided wakefield experiments driven by petawatt class ultra-short laser pulses (2007)

Mangles, S. P. D., Thomas, A. G. R., Bellei, C., Dangor, A. E., Kamperidis, C., Kneip, S., ...

We investigate the extension of self-injecting laser wakefield experiments to the regime that will be accessible with the next generation of petawatt class ultra-short pulse laser systems. Using...

Dynamic Control of Laser Produced Proton Beams (2007)

Kar, S., Markey, K., Simpson, P. T., Dromey, B., Borghesi, M., Zepf, M., ...

The emission characteristics of intense laser driven protons are controlled using ultra-strong (of the order of 10^9 V/m) electrostatic fields varying on a few ps timescale. The field structures are...

A summary of the beatwave experiments at Ecole Polytechnique (2007)

Amiranoff, F., Bernard, D., Cros, B., Jacquet, F., Matthieussent, G., Marques, J. R., ...

We present a summary of the beatwave particle acceleration program developed at Ecole Polytechnique. In dedicated experiments, plasma formation, plasma wave generation and saturation, and particle...

The Effect of Laser Focusing Conditions on Propagation and Monoenergetic Electron Production in Laser Wakefield Accelerators (2007)

Thomas, A. G. R., Najmudin, Z., Mangles, S. P. D., Murphy, C. D., Dangor, A. E., Kamperidis, C., ...

The effect of laser focusing conditions on the evolution of relativistic plasma waves in laser wakefield accelerators is studied both experimentally and with particle-in-cell simulations. For short...

Effect of laser-focusing conditions on propagation and monoenergetic electron production in laser-wakefield accelerators (2007)

Thomas, AGR, Najmudin, Z, Mangles, SPD, Murphy, CD, Dangor, AE, Kamperidis, C, ...

The effect of laser-focusing conditions on the evolution of relativistic plasma waves in laser-wakefield accelerators is studied both experimentally and with particle-in-cell simulations. For short...

Measurements of wave-breaking radiation from a laser-wakefield accelerator (2007)

Thomas, AGR, Mangles, SPD, Najmudin, Z, Kaluza, MC, Murphy, CD, Krushelnick, K

Spectral analysis of radiation emitted transverse to laser propagation in laser-wakefield acceleration experiments shows broadband emission when electrons are accelerated to relativistic energies....

Evidence of photon acceleration by laser wake fields (2006)

Murphy, CD, Trines, R, Vieira, J, Reitsma, AJW, Bingham, R, Collier, JL, ...

Photon acceleration is the phenomenon whereby a light wave changes color when propagating through a medium whose index of refraction changes in time. This concept can be used to describe the spectral...

Effect of laser contrast ratio on electron beam stability in laser wakefield acceleration experiments (2006)

Mangles, SPD, Thomas, AGR, Kaluza, MC, Lundh, O, Lindau, F, Persson, A, ...

Laser wakefield accelerators offer the possibility of compact electron acceleration. However one of the key outstanding issues with the results reported to date is the electron beam stability....

Laser-wakefield acceleration of monoenergetic electron beams in the first plasma-wave period (2006)

Mangles, SPD, Thomas, AGR, Kaluza, MC, Lundh, O, Lindau, F, Persson, A, ...

Beam profile measurements of laser-wakefield accelerated electron bunches reveal that in the monoenergetic regime the electrons are injected and accelerated at the back of the first period of the...

Collimated multi-MeV ion beams from high-intensity laser interactions with underdense plasma (2006)

Willingale, L, Mangles, SPD, Nilson, PM, Clarke, RJ, Dangor, AE, Kaluza, MC, ...

A beam of multi-MeV helium ions has been observed from the interaction of a short-pulse high-intensity laser pulse with underdense helium plasma. The ion beam was found to have a maximum energy for...

Measurements of forward scattered laser radiation from intense sub-ps laser interactions with underdense plasmas (2006)

Walton, BR, Mangles, SPD, Najmudin, Z, Tatarakis, M, Wei, MS, Gopal, A, ...

Two experiments studying the interaction of high intensity laser pulses (1x10(19)-5x10(20) W/cm(2)) with underdense plasma are compared. The experiments used lasers that differed in power and focused...

Magnetic reconnection and plasma dynamics in two-beam laser-solid interactions (2006)

Nilson, PM, Willingale, L, Kaluza, MC, Kamperidis, C, Minardi, S, Wei, M, ...

We present measurements of a magnetic reconnection in a plasma created by two laser beams (1 ns pulse duration, 1x10(15) W cm(-2)) focused in close proximity on a planar solid target. Simultaneous...

Monoenergetic beams of relativistic electrons from intense laser-plasma interactions (2004)

Mangles, S.P.D., Murphy, C.D., Najmudin, Z., Thomas, A.G.R., Collier, J.L., Dangor, A.E., ...

High-power lasers that fit into a university-scale laboratory can now reach focused intensities of more than 1019 W cm-2 at high repetition rates. Such lasers are capable of producing beams of...

Monoenergetic beams of relativistic electrons from intense laser-plasma interactions (2004)

Mangles, S.P.D., Murphy, C.D., Najmudin, Z., Thomas, A.G.R., Collier, J.L., Dangor, A.E., ...

High-power lasers that fit into a university-scale laboratory can now reach focused intensities of more than 1019 W cm-2 at high repetition rates. Such lasers are capable of producing beams of...

A Broadband Electron Spectrometer and Electron Detectors for Laser Accelerator Experiments (1998)

C. E. Clayton, K. A. Marsh, C. Joshi, C. B. Darrow, A. E. Dangor, A. Modena, ...

We describe the apparatus used to measure the spectrum of accelerated electrons from a laser-plasma acceleration experiment carried out atRutherford Appleton Laboratories (RAL). The source of the...