Characterization of protons accelerated from a 3 TW table-top laser system

Bellido, P.; Lera, Roberto; Seimetz, M.; Cruz, A. Ruiz-de la; Torres-Peiró, Salvador; Galán, Miguel Á.; Mur, P.; Sánchez, Isabel; Zaffino, R.; Vidal, Luis; Soriano, Antonio; Sánchez, S. F.; Sánchez, F.; Rodríguez-Álvarez, M. J.; Rigla, J. P.; Moliner, L.; Iborra, A.; Hernández, L.; Grau-Ruiz, D.; González, Alberto; Garcia-Garrigos, Juan J.; Caballero, Elena Díaz; Conde, P.; Aguilar, Albert; Roso, L.; Benlloch, J.

doi:10.1088/1748-0221/12/05/t05001

Cited by 8 publications

(14 citation statements)

References 41 publications

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“…Thinner gold membranes have almost the same performance as thicker aluminum ones (see figure 5(a)). This is in agreement with previous results from the same setup, but using flat foil targets [19], and has also been observed in former experiments with similar laser contrast [22]. A direct comparison of aluminum membranes supported by a nanometric oxide layer and free-standing ones, obtained after SiO 2 etching, may indicate slightly higher proton energy with SiO 2 , as shown in figure 5(b).…”

supporting

confidence: 93%

“…Proton acceleration experiments have been performed on a purpose-built Ti:Sa laser operating at a wavelength of 0.8 μm and based on Chirped Pulsed Amplification (CPA). It can deliver pulses of 265 mJ (165 mJ on target) with a duration of 55 fs (FWHM) up to a repetition rate of 10 Hz and has recently been commissioned in systematic tests on flat foil targets obtaining maximum proton energies around 1.7 MeV [19]. The amplified spontaneous emission (ASE) level was around 10 −8 of the main pulse.…”

mentioning

confidence: 99%

“…Some laser shots have been performed at longitudinal distances between −100 μm and 100 μm ( figure 3(b)) from the optimum focus to study the influence of the alignment precision on the measured proton energies. The spectral characterization of accelerated protons was achieved by two different particle detectors as detailed in [19]. A time-of-flight (TOF) detector based on a fast plastic scintillator coupled to a photomultiplier (PMT) was mounted at a distance of 227 cm behind the laser target.…”

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confidence: 99%

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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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confidence: 93%

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confidence: 99%

mentioning

confidence: 99%

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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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“…These experiments have been carried out on a 3 TW, table-top Ti:sapphire laser with up to 165 mJ focused energy on the laser target in 55 fs pulses (details of the setup have been reported in Ref. 23). To illustrate our method, we present three experimental data sets with different, maximum proton energies, obtained due to differing laser energies and target compositions.…”

Section: Application To Laser-accelerated Protonsmentioning

confidence: 99%

Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

Seimetz

Bellido

García

et al. 2018

Review of Scientific Instruments

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CR-39 nuclear track material is frequently used for the detection of protons accelerated in laser-plasma interactions. The measurement of track densities allows for determination of particle angular distributions, and information on the kinetic energy can be obtained by the use of passive absorbers. We present a precise method of measuring spectral distributions of laser-accelerated protons in a single etching and analysis process. We make use of a one-to-one relation between proton energy and track size and present a precise calibration based on monoenergetic particle beams. While this relation is limited to proton energies below 1 MeV, we show that the range of spectral measurements can be significantly extended by simultaneous use of absorbers of suitable thicknesses. Examples from laser-plasma interactions are presented, and quantitative results on proton energies and particle numbers are compared to those obtained from a time-of-flight detector. The spectrum end points of continuous energy distributions have been determined with both detector types and coincide within 50-100 keV.

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“…Both detectors were mounted inside a vacuum tube (for further details of the experimental setup see [15]).…”

Section: Laser-proton Acceleration Experimentsmentioning

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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Characterization of protons accelerated from a 3 TW table-top laser system

Cited by 8 publications

References 41 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

Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

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

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