Manipulation of laser-accelerated proton beam profiles by nanostructured and microstructured targets

Giuffrida, L.; Svensson, Krister; Pšikal, J.; Dalui, Malay; Ekerfelt, Henrik; González, I. Gallardo; Lundh, Olle; Persson, Anders; Lutoslawski, P.; Scuderi, V.; Kaufman, Jan; Wiste, Tuomas E.; Laštovička, T.; Picciotto, A.; Bagolini, Alvise; Crivellari, M.; Bellutti, P.; Milluzzo, G.; Cirrone, G.A.P.; Magnusson, Joel; Gonoskov, Arkady; Korn, G.; Wahlström, Claes‐Göran; Margarone, D.

doi:10.1103/physrevaccelbeams.20.081301

Cited by 18 publications

(16 citation statements)

References 26 publications

(35 reference statements)

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“…We focus our attention on a temporal interval similar to ours (30-65 fs) and target thicknesses below 1 μm. Data obtained with our setup are coherent with previous results [22,23,[24][25][26][27] considering the moderate laser power, and with the scaling typical of the TNSA mechanism for particle acceleration [28]. Previous measurements with flat membranes produced with MEMS techniques are rare.…”

supporting

confidence: 88%

Efficient proton acceleration from a 3 TW table-top laser interacting with submicrometric mass-produced solid targets

Zaffino¹,

Seimetz²,

Cruz³

et al. 2018

J. Phys. Commun.

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Thin layer membranes with controllable features and material arrangements are often used as target materials for laser driven particle accelerators. Reduced cost, large scale fabrication of such membranes with high reproducibility, and good stability are central for the efficient production of proton beams. These characteristics are of growing importance in the context of advanced laser light sources where increased repetition rates boost the need for consumable targets with design and properties adjusted to study the different phenomena arising in ultra-intense laser-plasma interaction. We present the fabrication of sub-micrometric thin-layer gold or aluminum membranes in a silicon wafer frame by using nano/micro-electro-mechanical-system (N/MEMS) processing which are suitable for rapid patterning and machining of many samples at the same time and allowing for highthroughput production of targets for laser-driven acceleration. Obtained targets were tested for laserproton acceleration through the Target Normal Sheath Acceleration mechanism (TNSA) in a series of experiments carried out on a purpose-made table-top Ti:Sa running at 3 TW peak power and 10 Hz diode pump rate with a contrast over ASE of 10 8 .

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supporting

confidence: 88%

Efficient proton acceleration from a 3 TW table-top laser interacting with submicrometric mass-produced solid targets

Zaffino¹,

Seimetz²,

Cruz³

et al. 2018

J. Phys. Commun.

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“…Such method was used to analyze the TOF signals acquired in different laser-acceleration experiments using laser systems from few TW up to PW power accelerating protons with energies ranging from few MeV up to 30 MeV 16,25,26 . The procedure was validated against other well-established diagnostics and optimized adapting it according to the different experimental conditions and purposes.…”

Section: A New Procedures For Proton Energy Spectrum Reconstructionmentioning

confidence: 99%

A new energy spectrum reconstruction method for time-of-flight diagnostics of high-energy laser-driven protons

Milluzzo

Scuderi

Alejo

et al. 2019

Review of Scientific Instruments

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The Time-of-Flight (ToF) technique coupled with semiconductor-like detectors, as silicon carbide and diamond, is one of the most promising diagnostic methods for high-energy, high repetition rate, laser-accelerated ions allowing a full on-line beam spectral characterization. A new analysis method for reconstructing the energy spectrum of high-energy laser-driven ion beams from TOF signals is hereby presented and discussed. The proposed method takes into account the detector's working principle, through the accurate calculation of the energy loss in the detector active layer, using Monte Carlo simulations. The analysis method was validated against well-established diagnostics, such as the Thomson Parabola Spectrometer, during an experimental campaign carried out at the Rutherford Appleton Laboratory (RAL, UK) with the high-energy laser-driven protons accelerated by the VULCAN Petawatt laser.

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“…Methods from micro and nano-fabrication have been used to enhance the surface properties of standard plan foil targets. For example, in [12], [13] a monolayer of polystyrene beads of 400 nm diameter was assembled on the laser-irradiated side of a 500 nm Mylar foil resulting in increase of the proton beam homogeneity compared to flat targets, whereas when assembled on the rear target surface this resulted also in enhancement of the proton beam divergence which could be useful for some applications such as proton radiography. Here, we have explored top-down based fabrication in order to obtain aluminum, and gold-based, membranes with thicknesses below 1 µm in a silicon frame which were then used as targets for laser driven particles acceleration experiments through the TNSA mechanism.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of micro-nano engineered targets for high-power laser experiments

Zaffino

Seimetz

Quirion

et al. 2018

Microelectronic Engineering

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The continuous development of ultra-fast high-power lasers (HPL) technology with the ability of working at unprecedented repetition rates, between 1 and 10 Hz, is raising the target needs for experiments in the different areas of interest to the HPL community. Many target designs can be conceived according to specific scientific issues, however to guarantee manufacturing abilities that enable large number production and still allow for versatility in the design is the main barrier in the exploitation of these high repetition rate facilities. Here, we have applied MEMS based manufacturing processes for this purpose. In particular, we have focused on the fabrication and characterization of submicrometric conductive membranes embedded in a silicon frame. These kinds of solid targets are used for laser-driven particle acceleration through the so-called Target Normal Sheath Acceleration mechanism (TNSA). They were obtained by top-down fabrication alternating pattern transfer, atomic layer deposition, and selective material etching. The adaptability of the approach is then analyzed and discussed by evaluating different properties of targets for use in laser-driven particle acceleration experiments. These characteristics include the surface properties of membranes after fabrication and the high density of the target array. Finally, we were able to show their efficiency for laser-driven proton acceleration in a series of experiments with a 3 TW table-top laser facility, achieving stable proton acceleration up to 2 MeV.

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Manipulation of laser-accelerated proton beam profiles by nanostructured and microstructured targets

Cited by 18 publications

References 26 publications

Efficient proton acceleration from a 3 TW table-top laser interacting with submicrometric mass-produced solid targets

Efficient proton acceleration from a 3 TW table-top laser interacting with submicrometric mass-produced solid targets

A new energy spectrum reconstruction method for time-of-flight diagnostics of high-energy laser-driven protons

Preparation and characterization of micro-nano engineered targets for high-power laser experiments

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