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Development and characterisation of an XeCl excimer laser-generated soft-X-ray plasma source and its applications (1996)

Bollanti, S. ; Cotton, R. ; Lazzaro, P. ; [et al.]

Springer

Il nuovo cimento della Società Italiana di Fisica 18 (1996), S. 1241-1255

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ISSN: 0392-6737

Keywords: thermodynamics of plasmas ; Ionizing radiations (ultraviolet, X-rays, γ-rays, ions, electrons, positrons, neutrons, and mesons, etc) ; Biophysical instrumentation and techniques ; X-ray spectra ; PACS 42.55Gp ; Excimer lasers

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Summary A large-aperture, long-pulse XeCl excimer laser has been used to generate a soft-X-ray plasma source. Several laser optical configurations have been employed to optimise X-ray emission, including positive-branch unstable resonators and injection by seeding the gain region of the laser with a small commercial excimer laser, resulting in power densities in the range 1012–1014 W cm−2. The characteristics of the plasma source for each different laser configuration and for different target materials are investigated. The most suitable source conditions (spectral energy distribution, time duration, etc.) for specific applications are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02453259

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Study of a X-ray laser-plasma source for radiobiological experiments: microdosimetry analysis and plasma characterisation (2000)

Bortolotto, F. ; Batani, D. ; Previdi, F. ; [et al.]

Springer

The European physical journal 11 (2000), S. 309-320

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ISSN: 1434-6079

Keywords: PACS. 87.50.-a Effects of radiation and external fields on biomolecules, cells and higher organisms - 42.55.-f Lasers - 52.25.Nr Emission, absorption, and scattering of X and radiation

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: A soft X-ray laser-plasma source, used in radiobiology experiments with yeast cells, was characterised with flat crystal spectrometers and P-I-N diodes, obtaining an absolute measurement of the emission spectrum. A comparison with the results of simulations performed with the code RATION allowed the characterisation of the emitting plasma. A model for the energy deposition in yeast cells was developed to take into account the different cell structures (wall-membrane complex, cytoplasm and nucleus). Dose calculations performed considering the source emission spectrum were compared with direct measurements of transmission through plastic foils and allowed to verify the hypothesis of preferential dose deposition in the outer cellular regions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530070098

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