Author: Freeman, M.S.
Paper Title Page
TUXD4 Analysis Methods for Electron Radiography Based on Laser-Plasma Accelerators 274
  • G.M. Bruhaug, G.W. Collins, H.G. Rinderknecht, J.R. Rygg, J.L. Shaw, M.S. Wei
    LLE, Rochester, New York, USA
  • M.S. Freeman, F.E. Merrill, L.P. Neukirch, C. Wilde
    LANL, Los Alamos, New Mexico, USA
  Funding: DOE National Nuclear Security Administration under Award Number DE-NA0003856 DOE under Awards DE-SC00215057 University of Rochester New York State Energy Research and Development Authority
Analysis methods are presented for determining the res-olution of both contact and projected electron radiography based on a laser-plasma accelerator. A means to determine the field strength of the electric/magnetic fields generated when a laser is incident on an object of interest is also outlined. Broad radiography results are reported and future plans for the diagnostic technique are outlined.
slides icon Slides TUXD4 [12.157 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-TUXD4  
About • Received ※ 02 August 2022 — Revised ※ 04 August 2022 — Accepted ※ 06 August 2022 — Issue date ※ 03 September 2022
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Development of Achromatic Imaging Capabilities for pRad at LANSCE  
  • M. Schanz, J.C. Allison, M.S. Freeman, F.G. Mariam, C.L. Morris, L.P. Neukirch, Z. Tang
    LANL, Los Alamos, New Mexico, USA
  • E.V. Valetov
    MSU, East Lansing, Michigan, USA
  Funding: The research presented is supported by the Laboratory Directed Research and Development program of Los Alamos National Laboratory under project number 20220343ER.
Proton radiography is a powerful diagnostics technique that is capable of resolving ultra-fast processes on the ns scale in dense matter with micrometer spatial resolution. This unique performance is realized by the use of a chromatic imaging system, which consists of four quadrupole lenses [1]. Chromatic imaging systems have a mono-energetic focal length. That means, if a target with areas of different energy losses is to be investigated, it is only possible to focus on one proton energy leaving other areas of interest blurred. A simple method of focusing multiple energies at once and thus increasing the depth-of-field is the use of multiple detector stations along the beam axis. Proton images captured at downstream detector positions can be combined into a single image using a method called ’focus stacking’. A complete cancellation of the position- and energy dependent 2nd order chromatic aberrations that mostly affect the current image quality of pRad [2] is only possible by using an achromatic imaging system. Following the proposals in early design studies at LANSCE [3] a new prototype achromatic system is currently being developed for a 25 MeV S-band electron accelerator.
[1] N. King, et al., Nucl. Instr. and Meth. in Phys. Res. A, Vol 424, 1999
[2] F.E. Merrill, Rev. of Acc. Sci. and Tech. Vol 8, 2015
[3] B. Blind, A.J. Jason, Proc. of PAC, 2005
slides icon Slides TUXD5 [4.745 MB]  
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