Spectroscopy Methods and Applications of the Tor Vergata Laser-Plasma Facility Driven by GW-Level Laser System

A review focused on plasma induced on solid target by GW-level pulsed laser source is presented. A description of the Tor Vergata laser-plasma source (TVLPS), at the Tor Vergata University in Rome, is given. Such a facility uses a 1 GW, tabletop, multistage Nd:YAG/Glass laser system, delivering infrared (IR) pulses with nanosecond width and 1064 nm wavelength (TEM00 mode). Its applications are discussed providing: wide analysis of IR → soft X-ray conversion efficiency (1.3–1.55 keV); measures and modeling of line emission in soft X-ray spectra, such as those from zinc plasma near Ne-like Zn XXI and from barium plasma near Ni-like Ba XXIX. Particular attention is devoted to high-n dielectronic Rydberg satellites for finding a useful diagnostic tool for plasma conditions. Dependence of plasma spectra on laser parameters is shown. Finally, microradiography applications are presented for thin biological samples. Images permit to visualize specific structures and detect bioaccumulation sites due to contamination from pollutants.

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Multiply-charged ion x-ray spectra excited by a pulsed laser plasma source with various pulse duration and shape

Physica Scripta ◽

10.1088/0031-8949/51/6/005 ◽

1995 ◽

Vol 51 (6) ◽

pp. 714-720 ◽

Cited By ~ 4

Author(s):

V V Akulinichev ◽

E G Pivinsky ◽

A S Shlyaptseva ◽

V L Kantsyrev ◽

I E Golovkin

Keyword(s):

Pulse Duration ◽

Laser Plasma ◽

Pulsed Laser ◽

Plasma Source ◽

X Ray ◽

Multiply Charged

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Bright High-Order Harmonic Generation around 30 nm Using Hundred-Terawatt-Level Laser System for Seeding Full Coherent XFEL

Applied Sciences ◽

10.3390/app8091446 ◽

2018 ◽

Vol 8 (9) ◽

pp. 1446 ◽

Cited By ~ 2

Author(s):

Luyao Zhang ◽

Yinghui Zheng ◽

Guicun Li ◽

Zhengmao Jia ◽

Yanyan Li ◽

...

Keyword(s):

Harmonic Generation ◽

Beam Quality ◽

Laser System ◽

High Harmonic ◽

High Order ◽

Laser Source ◽

High Order Harmonic Generation ◽

X Ray ◽

High Order Harmonic ◽

Level Laser

In the past few years, the laser wakefield acceleration (LWFA) electron is a hot topic. One of its applications is to produce soft X-ray free-electron laser (XFEL). During this process, high harmonic generation (HHG) is a potential seed. To decrease the timing jitter between LWFA and HHG, it is better for them to come from the same laser source. We have experimentally investigated bright high-order harmonic generation with a 200-terawatt (TW)/1-Hz Ti: Sapphire laser system. By using the loosely focused method and optimizing the phase-matching conditions, we have obtained bright high-order harmonics around 30 nm. Output energy of the 29th harmonic (27.6 nm) reaches as high as 100 nJ per pulse, and the harmonic beam divergence is estimated to be 0.3 mrad in a full width at half maximum (FWHM). Although the hundred-TW-level laser system has the problems of poor beam quality and shot-to-shot energy fluctuation for HHG, the generated soft X-ray (~30 nm) sources can also have good stability by carefully optimizing the laser system.

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