Detection of radioactive isotopes by using laser Compton scattered -ray beams

Measured Emittance Dependence on the Injection Method in Laser Plasma Accelerators

“…Owing to their ability to accelerate electron beams to GeV-class energies over cm-scale distances with fsscale bunch durations and ultra low emittances [1], laser plasma accelerators (LPAs) are poised to usher in a new era of compact accelerator driven applications. Compact LPA-based x-ray FELs [2][3][4][5], compact monoenergetic MeV-class Thomson-scattered photons [6,7], and progress towards an LPA-based electron-positron collider [8], are actively pursued. Most LPA-based applications require excellent 6D electron beam brightness, defined as B 6D = I b / (σ E x y ) where I b is the peak beam current, σ E is the energy spread, and x,y are the normalized transverse emittances (herein referred to simply as emittance).…”

Optically Controlled Laser-Plasma Electron Acceleration for Compact γ-Ray Sources

“…These have a high degree of polarization and are thus attractive as e-beam diagnostics [53,54]. Their other applications are generation of polarized positrons from dense targets [55] and nuclear resonance fluorescence studies [56][57][58][59][60][61]. However, the large footprint of conventional accelerators makes such radiation sources scarce and busy user facilities.…”

“…A longer ILP would help increase the photon yield by another order of magnitude, without jeopardizing the repetition rate. Overall, this brings an expectation of greater than 10 9 ph/s yield, which is not as high as 10 13 ph/s permitted by large linacs [57], yet sufficient to identify considerable masses of enriched uranium within minutes [61]. From the viewpoint of laboratory practice, computerized manipulations of the phase and shape of the sub-Joule stack components, using adaptive optics and genetic algorithms [82,83], should aid greatly in practical realization of the system.…”

Development of a Laser Repetition Rate Stabilization System for an Intense Laser-Compton Scattering <i>γ</i>-Ray Source

“…Because this technique can be applied to quantitative management of nuclear fuel, it is suitable for nuclear nonproliferation studies. A useful LCS-γ source for the nondestructive assay of nuclear fuel and minor actinides in spent nuclear fuel [9,10] must produce a large number of γ-ray photons (∼10 13 photons/s). To achieve such intense γ-ray generation, large-current ultra-high-quality short-bunched electron beams are required.…”