All-optical measurement of the hot electron sheath driving laser ion acceleration from thin foils

Jäckel, O.; Polz, J.; Pfotenhauer, Sebastian; Schlenvoigt, Hans-Peter; Schwoerer, H.; Kaluza, Malte C.

doi:10.1088/1367-2630/12/10/103027

Cited by 39 publications

(35 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11 While the stopping range of MeV electrons in matter at solid density is of the order $mm, it has been observed in numerous experiments that strong electrostatic sheath fields confine the hot electrons to the target volume [e.g., Refs. [12][13][14]. In particular, when so-called "reduced mass targets" (also termed "mass-limited") are employed this hot electron "refluxing" offers the potential to efficiently generate matter at high energy density [e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

Evidence for ultra-fast heating in intense-laser irradiated reduced-mass targets

et al. 2012

View full text Add to dashboard Cite

We report on an experiment irradiating individual argon droplets of 20 lm diameter with laser pulses of several Joule energy at intensities of 10 19 W/cm 2 . K-shell emission spectroscopy was employed to determine the hot electron energy fraction and the time-integrated charge-state distribution. Spectral fitting indicates that bulk temperatures up to 160 eV are reached. Modelling of the hot-electron relaxation and generation of K-shell emission with collisional hot-electron stopping only is incompatible with the experimental results, and the data suggest an additional ultra-fast (sub-ps) heating contribution. For example, including resistive heating in the modelling yields a much better agreement with the observed final bulk temperature and qualitatively reproduces the observed charge state distribution. V C 2012 American Institute of Physics.

show abstract

Section: Introductionmentioning

confidence: 99%

Evidence for ultra-fast heating in intense-laser irradiated reduced-mass targets

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Several probing geometries and imaging techniques are available to ascertain detailed information about laser-plasma interactions in underdense plasmas including the underdense regions of laser interactions involving solid targets. 6 Experimental results yielding high-resolution images of a laser-driven plasma wave in the context of laser-electron acceleration highlight the large potential of this probe-beam setup. Further investigation of these interactions can help define the necessary conditions for stable relativistic electron or ion acceleration, characterize instabilities within the plasma, and potentially shed light on novel laser-plasma phenomena.…”

Section: à3mentioning

confidence: 95%

“…The investigation of these phenomena in the single-shot regime adds another level of complexity to these experiments. [5][6][7][8][9][10] A well-known phenomenon on the femtosecondtimescale is described in Tajima and Dawson's discussion of the laser wakefield associated with a plasma wave generated in laser-electron acceleration experiments. 11 The plasma wave is created via the ponderomotive force of a highintensity laser pulse as it propagates through underdense plasma.…”

mentioning

confidence: 99%

Few-cycle optical probe-pulse for investigation of relativistic laser-plasma interactions

Schwab¹,

Sävert²,

Jäckel

et al. 2013

Appl. Phys. Lett.

View full text Add to dashboard Cite

“…Thus far, only indirect evidence of the escaping electrons has been detected by measuring the radiated electromagnetic pulses [33,34] and magnetic fields [35]. On the other hand, some electron properties, e.g., charge, angular distribution and energy, have been directly measured [36][37][38][39].…”

Section: Eos Diagnostics For Fs Resolution Probing High Intensity Lasmentioning

confidence: 99%

Novel Single-Shot Diagnostics for Electrons from Laser-Plasma Interaction at SPARC_LAB

Bisesto

Anania

Botton

et al. 2017

QuBS

View full text Add to dashboard Cite

Nowadays, plasma wakefield acceleration is the most promising acceleration technique for compact and cheap accelerators, needed in several fields, e.g., novel compact light sources for industrial and medical applications. Indeed, the high electric field available in plasma structures (>100 GV/m) allows for accelerating electrons at the GeV energy scale in a few centimeters. Nevertheless, this approach still suffers from shot-to-shot instabilities, mostly related to experimental parameter fluctuations, e.g., laser intensity and plasma density. Therefore, single shot diagnostics are crucial in order to properly understand the acceleration mechanism. In this regard, at the SPARC_LAB Test Facility, we have developed two diagnostic tools to investigate properties of electrons coming from high intensity laser-matter interaction: one relying on Electro Optical Sampling (EOS) for the measurement of the temporal profile of the electric field carried by fast electrons generated by a high intensity laser hitting a solid target, the other one based on Optical Transition Radiation (OTR) for single shot measurements of the transverse emittance. In this work, the basic principles of both diagnostics will be presented as well as the experimental results achieved by means of the SPARC high brightness photo-injector and the high power laser FLAME.

show abstract

All-optical measurement of the hot electron sheath driving laser ion acceleration from thin foils

Cited by 39 publications

References 55 publications

Evidence for ultra-fast heating in intense-laser irradiated reduced-mass targets

Evidence for ultra-fast heating in intense-laser irradiated reduced-mass targets

Few-cycle optical probe-pulse for investigation of relativistic laser-plasma interactions

Novel Single-Shot Diagnostics for Electrons from Laser-Plasma Interaction at SPARC_LAB

Contact Info

Product

Resources

About