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Kansai Photon Science Institute

Kansai Photon Science Institute   |   The 36th KPSI Seminar Ion acceleration and EMP studies using cryogenic and 3D printed targetry

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Kansai Photon Science Institute >> KPSI Seminar >> Ion acceleration and EMP studies using cryogenic and 3D printed targetry

 

Seminar

The 36th KPSI Seminar

Ion acceleration and EMP studies using cryogenic and 3D printed targetry

 

Presentor Prof. David NEELY
(Central Laser Facility, Rutherford Appleton Laboratory, United Kingdom)
Jobstatus STFC Fellow
Place ITBL G201 room (KPSI)
Date 13:15 - (Thu.) Apr. 19, 2018
Language English
abstract [PDFfile/70kb]

Ion acceleration and EMP studies using cryogenic and 3D printed targetry

Prof. David NEELY
(Central Laser Facility, Rutherford Appleton Laboratory, United Kingdom)

abstract

High Power Lasers capable of achieving relativistic intensities >10^18 Wcm^2 on target are rapidly developing worldwide and are promising drivers for producing bright sources of multi 10’s MeV ion beams. Understanding the mechanisms which control the spectral content is essential, as such ion beams will have many applications from probing electrostatic and magnetic fields through to studies of EMP, plasma heating, stopping powers, cellular damage at high flux rates, ion fast ignition and pulsed neutron production etc.Using a recently developed cryogenic target system, an ultra thin layer of deuterium can be readily deposited as a pure low Z surface layer. To ensure that the layer is contaminant free it is deposited ms before the shot and using a combination of coating parameters it can be adjusted from a few nm’ s to microns in thickness. By controlling the thickness of the deuterium layer it can act as a probe of the acceleration sheath dynamics. Also, as deuterium has a lower charge to mass ratio than hydrogen it can be used to modify the spectral content of the accelerated ions, producing peaked spectra. The escaping electron population from a metallic foil targets and the EMP fields generated simultaneously were measured as a function of driving pulse length in the range 1-20 ps. These measurements were carried out using the Vulcan PW laser.The escaping electron population from a metallic foil targets and the EMP fields generated simultaneously were measured as a function of driving pulse length in the range 1-20 ps. These measurements were carried out using the Vulcan PW laser. The scaling of the electron flux, temperature and EMP will be presented.

 

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