Scientific Commons: PA Norreys

Artificial collimation of fast-electron beams with two laser pulses (2008)

A scheme for artificially collimating fast-electron beams produced in high intensity (> 10(19) W cm(-2)) laser-solid interactions is proposed. The scheme uses a laser pulse at the relativistic...

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...

Vulcan petawatt-operation and development (2006)

Hernandez-Gomez, C, Brummitt, PA, Canny, DJ, Clarke, RJ, Collier, J, Danson, CN, ...

Petawatt capability on the Vulcan laser facility has been available to the international plasma physics community for over two years. This has enabled novel experiments to be carried out and new...

Evidence of photon acceleration by laser wake fields (vol 13, pg 033108, 2006) (2006)

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

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...

Study of electron and proton isochoric heating for fast ignition (2006)

Key, MH, Akli, K, Beg, F, Chen, MH, Chung, HK, Freeman, RR, ...

Isochoric heating by electrons has been measured in the two limiting cases of small area thin foils with dominant refluxing and cone-long-wire geometry with negligible refluxing in the wire. Imaging...

Wave-breaking limits for relativistic electrostatic waves in a one-dimensional warm plasma (2006)

Trines, RMGM, Norreys, PA

The propagation of electrostatic plasma waves having relativistic phase speed and amplitude has been studied. The plasma is described as a warm, relativistic, collisionless, nonequilibrium,...

Reduction of proton acceleration in high-intensity laser interaction with solid two-layer targets (2006)

Wei, MS, Davies, JR, Clark, EL, Beg, FN, Gopal, A, Tatarakis, M, ...

Reduction of proton acceleration in the interaction of a high-intensity, picosecond laser with a 50-mu m aluminum target was observed when 0.1-6 mu m of plastic was deposited on the back surface...

Radiological characterisation of photon radiation from ultra-high-intensity laser-plasma and nuclear interactions (2006)

Clarke, RJ, Neely, D, Edwards, RD, Wright, PNM, Ledingham, KWD, Heathcote, R, ...

With the increasing number of multi-terawatt (10(12) W) and petawatt (10(15) W) laser interaction facilities being built, the need for a detailed understanding of the potential radiological hazards...

Comment on "Measurements of energetic proton transport through magnetized plasma from intense laser interactions with solids" (2006)

Clark, EL, Krushelnick, K, Zepf, M, Tatarakis, M, Beg, FN, Norreys, PA, ...

Proton radiography of a laser-driven implosion (2006)

Mackinnon, AJ, Patel, P, Borghesi, M, Clarke, RC, Freeman, RR, Habara, H, ...

Protons accelerated by a picosecond laser pulse have been used to radiograph a 500 mu m diameter capsule, imploded with 300 J of laser light in 6 symmetrically incident beams of wavelength 1.054 mu m...

Hot surface ionic line emission and cold K-inner shell emission from petawatt-laser-irradiated Cu foil targets (2006)

Theobald, W, Akli, K, Clarke, R, Delettrez, JA, Freeman, RR, Glenzer, S, ...

A hot, 2 to 3 keV electron temperature surface plasma was observed in the interaction of a 0.7 ps petawatt laser beam with solid copper-foil targets at intensities > 10(20) W/cm(2). Copper K-shell...

Operation of target diagnostics in a petawatt laser environment (invited) (2006)

Stoeckl, C, Glebov, VY, Jaanimagi, PA, Knauer, JP, Meyerhofer, DD, Sangster, TC, ...

The operation of target diagnostics in a high-energy petawatt laser environment is made challenging by the large number of energetic electrons, hard x rays, and energetic particles produced in...

Neutron measurements and diagnostic developments relevant to fast ignition (2006)

Habara, H, Norreys, PA, Kodama, R, Stoeckl, C, Glebov, VY

In recent fast ignitor research, neutron measurements have become increasingly important not only to understand the ultraintense laser-plasma interaction physics associated with ion acceleration and...

Fast heating of high-density plasmas with a reentrant cone concept (2006)

Kodama, R, Norreys, PA, Sentoku, Y, Campbell, RB

A reentrant cone concept for efficient heating of high-density plasmas has been studied as an advanced fast ignition scheme. The roles of the reentrant cone, as indicated by particle-in-cell (PIC)...

Integral experiments for fast ignition research (2006)

Tanaka, KA, Kodama, R, Norreys, PA

This paper reviews the important schemes that have been investigated thus far in fast ignition research. Integral experiments for fast ignition research have been conducted utilizing various schemes:...

Electron beam hollowing in laser-solid interactions (2006)

Davies, JR, Green, JS, Norreys, PA

Electron beam hollowing in a plasma is investigated using an analytical, rigid beam model and two different hybrid codes in an attempt to explain observations of hollow plasma formations on the...

The development of a flexible large area neutron spectrometer for ultra-intense laser-plasma interaction experiments (2006)

Habara, H, Lancaster, KL, Norreys, PA

A flexible multi-channel neutron spectrometer has been constructed to measure both the ion temperature and acceleration mechanisms in ultra-intense laser-plasma interactions. Angularly resolved...

A new diagnostic for very high magnetic fields in expanding plasmas (2005)

Eliezer, S, Mendonca, JT, Bingham, R, Norreys, PA

Effects of landau quantization on the equations of state in intense laser plasma interactions with strong magnetic fields (2005)

Eliezer, S, Norreys, PA, Mendonca, JT, Lancaster, K

TiK alpha radiography of Cu-doped plastic microshell implosions via spherically bent crystal imaging (2005)

King, JA, Akli, K, Zhang, B, Freeman, RR, Key, MH, Chen, CD, ...

Characterization of a picosecond laser generated 4.5 keV TiK-alpha source for pulsed radiography (2005)

King, JA, Akli, K, Snavely, RA, Zhang, B, Key, MH, Chen, CD, ...

Broad energy spectrum of laser-accelerated protons for spallation-related physics (2005)

McKenna, P, Ledingham, KWD, Shimizu, S, Lang, JM, Robson, L, McCanny, T, ...

Beam instabilities in laser-plasma interaction: Relevance to preferential ion heating (2005)

Mendonca, JT, Norreys, PA, Bingham, R, Davies, JR