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We investigate beam pointing dynamics in filamentation in gases driven by high repetition rate femtosecond laser pulses. Upon suddenly exposing a gas to a kilohertz train of filamenting pulses, the filament is steered from its original…

Optics · Physics 2017-07-26 N. Jhajj , Y. -H. Cheng , J. K. Wahlstrand , H. M. Milchberg

Nonlinear selective reflection from the interface YAG window-high density rubidium vapor in the high-temperature cell is studied at the transition 5S$_{1/2}$-5P$_{3/2}$. In the experiment tunable pump and probe lasers are used. The…

Atomic Physics · Physics 2024-07-10 V. A. Sautenkov , S. A. Saakyan , A. A. Bobrov , B. B. Zelener

The application of tunable diode laser absorption spectroscopy (TDLAS) to flames with non-homogeneous temperature and concentration fields is an area where only few studies exist. Experimental work explores the performance of tomographic…

Optics · Physics 2014-11-26 Avishek Guha , Ingmar Schoegl

2D profiles of electron density and neutral temperature are inferred from multi-delay Coherence Imaging Spectroscopy data of divertor plasmas using a non-linear inversion technique. The inference is based on imaging the spectral…

We developed a novel gamma-ray detection system (TIARA) for range monitoring in Particle Therapy. The system employs Cherenkov-based gamma-ray detection modules arranged around the target or patient, operated in time coincidence with a fast…

Warm dense matter (WDM) plays an important role in astrophysical objects and technological applications, but the rigorous diagnostics of corresponding experiments is notoriously difficult. In this work, we present a model-free analysis of…

The accurate assessment of the local tritium concentration in the tokamak first wall by means of the laser-induced desorption (LID) diagnostic is sought as one the key solutions to monitoring the local radioactive tritium content in the…

Plasma Physics · Physics 2023-08-14 A. A. Stepanenko , Yu. M. Gasparyan

Dynamics light scattering (DLS) is a widely used techniques to characterize dynamics in soft phases. Evanescent Wave DLS refers to the case of total internal reflection DLS that probes near interface dynamics. We here investigate the use of…

Soft Condensed Matter · Physics 2021-06-24 Antonio Giuliani , Benoit Loppinet

For the last decade numerous researchers have been trying to develop experimental techniques to use X-ray Thomson scattering as a method to measure the temperature, electron density, and ionization state of high energy density plasmas such…

Plasma Physics · Physics 2012-10-02 J. Nilsen , W. R. Johnson , K. T. Cheng

The Penning-trap electronic-detection technique that offers the precision and sensitivity requested in mass spectrometry for fundamental studies in nuclear and particle physics has not been proven yet to be universal. This has motivated the…

We report results on all-optical Thomson scattering intercepting the acceleration process in a laser wakefield accelerator. We show that the pulse collision position can be detected using transverse shadowgraphy which also facilitates…

Accelerator Physics · Physics 2019-05-20 Sabine Schindler , Andreas Döpp , Hao Ding , Max Gilljohann , Johannes Goetzfried , Stefan Karsch

Neutron beam monitors are an essential diagnostic component of neutron scattering facilities. They are used to measure neutron flux, calibrating experiments performed on the instruments, allowing measurement of facility performance,…

Instrumentation and Detectors · Physics 2020-11-12 F. Issa , R. Hall-Wilton , A. Quintanilla , M. Olsson , D. Zielinski , K. Kanaki , N. Tsapatsaris

We have built a CsI(Tl) gamma-ray detector array for the NPDGamma experiment to search for a small parity-violating directional asymmetry in the angular distribution of 2.2 MeV gamma-rays from the capture of polarized cold neutrons by…

Scintillation light from gamma ray irradiation in liquid xenon is detected by two Hamamatsu R9288 photomultiplier tubes (PMTs) immersed in the liquid. UV light reflector material, PTFE, is used to optimize the light collection efficiency.…

Instrumentation and Detectors · Physics 2008-11-26 K. Ni , E. Aprile , K. L. Giboni , P. Majewski , M. Yamashita

In recent works we discussed the feasibility of the radar detection technique as a new method to probe high-energy cosmic-neutrino induced plasmas in ice. Using the different properties of the induced ionization plasma, an energy threshold…

High Energy Astrophysical Phenomena · Physics 2018-02-16 Krijn D. de Vries , Paul Coppin , Aongus O'Murchadha , Olaf Scholten , Simona Toscano , Nick van Eijndhoven

The characteristics of backward diffraction radiation (BDR), i.e. radiation of the charged particle passing through a slit in the tilted screen, has been considered. The technique for non-destructive beam diagnostics based on the…

Accelerator Physics · Physics 2007-05-23 A. P. Potylitsyn , N. A. Potylitsyna

The increasing use of microfluidics in industrial, biomedical, and clinical applications requires a more and more precise control of the microfluidic flows and suspended particles or cells. This leads to higher demands in three-dimensional…

Fluid Dynamics · Physics 2020-11-10 Massimiliano Rossi , Rune Barnkob

We use effective field theory and thermal field theory to study the dynamical screening effect in the QED plasma on the $\alpha$-$\alpha$ scattering at the $^8$Be resonance. Dynamical screening leads to an imaginary part of the potential…

Nuclear Theory · Physics 2017-06-14 Xiaojun Yao , Thomas Mehen , Berndt Müller

In this work, a non-intrusive, spatially resolved, spectro-tomographic optical diagnostic of the electronic density and temperature on the linear plasma column Mistral is presented. Coupling of spectroscopy and tomography technique gives…

Plasma Physics · Physics 2020-05-14 V. Gonzalez-Fernandez , P. David , R. Baude , A. Escarguel , Y. Camenen

The Cherenkov Telescope Array (CTA) is the next generation of Imaging Atmospheric Cherenkov Telescopes. It will reach a sensitivity and energy resolution never obtained until now by any other high energy gamma-ray experiment. Understanding…

Instrumentation and Methods for Astrophysics · Physics 2018-01-22 G. Vasileiadis , O. Blanch , J. Bregeon , P. Brun , O. Calpe , M. Colak , M. Doro , L. Font , M. Gaug , S. Griffiths , C. Maggio , M. Martinez , O. Martinez , P. Ristori , S. Rivoire