| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:35 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Study of the helical laser beam profile on the particle acceleration
Authors:
Daniel DOROBANȚU(1,2), Theodor ASAVEI(1), Mihail CERNĂIANU(1), Domenico DORIA(1), Petru GHENUCHE(1), Alexandru MĂGUREANU(1), Viorel NĂSTASĂ(1), Deepak SANGWAN(1), Lucian TUDOR(1)
*
Affiliation:
1) Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering - Extreme Light Infrastructure - Nuclear Physics;
2) University of Bucharest, Faculty of Physics.
E-mail
daniel.dorobantu@eli-np.ro
Keywords:
Laser-driven particle acceleration, Helical beams
Abstract:
The understanding of the underlying mechanisms behind the interaction of radiation with the cell tissue represents the fundamental motivation behind any radiobiology study. Search for different ways of delivering the requested dose within the tumour while sparing the healthy tissue as much as possible led to the idea of using light ions i.e. protons and 12C due to their characteristic Bragg peak for treatment of certain tumours. While huge particle accelerators widely used for accelerating light ions at energies within the therapeutic window require heavy magnets and tremendous radioprotection shielding, laser-driven particle accelerators represent a completely new approach due to the new generation of the multi-PW laser class, where intensities of up to 10^23 W/cm^2 can be reached allowing the acceleration of protons and 12C at the required energies via the very well known TNSA (Target Normal Sheath Acceleration) mechanism leading to compact and robust radiotherapy platforms and also opening new research fields in radiobiology due to the huge brightness of the particle pulse. Such a radiobiology platform will be built at the ELI-NP (Extreme Light Infrastructure - Nuclear Physics) facility, where multi-PW lasers are already running. A completely new approach in which a helical plasma mirror is used for changing the Gaussian profile of the laser beam to a helical one leading to the focusing of the accelerated particle beam within the produced plasma as an alternative to the heavy quadrupole magnets will be presented.
Acknowledgement:
We thank the LDED team (Laser Driven Experiments Department) for their contributions to this experiment and also members of the LSD (Lasers System Department) as well as the Thales team for the very successful operation of the HPLS (High Power Laser System).
|
|
|
|