Speaker
Alejandro Laso Garcia
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P4.2039.pdf
Multipurpose single shot, offline and online, gamma calorimeters for
ultra-high intensity laser-plasma experiments
A. Laso Garcia1, M. Molodtsova1, A. Ferrari1, M. Downer2, A. Hannasch2, A. Irman1, J.
Metzkes-Ng1, T. Cowan1
1
Institute of Radiation Physics, Helmholtz-Zentrum Dresden – Rossendorf, Dresden,
Germany
2
Department of Physics, University of Texas at Austin, Austin, Texas 78712-1081, USA
3
Institute, City, Country
Highly intense gamma ray bursts (>106 gamma/shot) are associated with the interaction of
ultra-intense lasers with solid targets. In the case of underdense plasmas, burst of gamma
rays can be generated via inverse Compton processes between the laser and the accelerated
electrons. In both cases, a suitable diagnostic is required.
In this talk, we present a multipurpose gamma calorimeter based on absorber materials and
image plates that provides a single shot measurement of the gamma spectrum. Furthermore,
measurement results from an online-readout calorimeter based on scintillators will also be
presented.
Both detectors have been successfully fielded at the high power laser facility DRACO at
Helmholtz-Zentrum Dresden – Rossendorf. We report the results of bremsstrahlung
measurements at ion acceleration with solid targets as well as inverse Compton
measurements at laser wakefield acceleration in which the calorimeters have recorded data
over more than a thousand shots.
