@article{oai:nagoya.repo.nii.ac.jp:00022767,
 author = {Kuwahara, Makoto and Nambo, Yoshito and Aoki, Kota and Sameshima, Kensuke and Jin, Xiuguang and Ujihara, Toru and Asano, Hidefumi and Saitoh, Koh and Takeda, Yoshikazu and Tanaka, Nobuo},
 issue = {1},
 journal = {Applied Physics Letters},
 month = {Jul},
 note = {The space charge effect has been clearly observed in the energy distributions of picosecond pulse beams from a spin-polarized electron microscope, and was found to depend upon the quantity of charge per pulse. The non-linear phenomena associated with this effect have also been replicated in beam simulations that take into account of a three-dimensional space charge. The results show that a charge of 500 aC/pulse provides the highest brightness with a 16-ps pulse duration, a 30-keV beam energy, and an emission spot of 1.8 μm. Furthermore, the degeneracy of the wave packet of the pulsed electron beam has been evaluated to be 1.6 × 10−5 with a charge of 100 aC/pulse, which is higher than that for a continuously emitted electron beam despite the low beam energy of 30 keV. The high degeneracy and high brightness contribute to the realization of high temporal and energy resolutions in low-voltage electron microscopy, which will serve to reduce radiolysis damage and enhance scattering contrast.},
 pages = {013108--013108},
 title = {The Boersch effect in a picosecond pulsed electron beam emitted from a semiconductor photocathode},
 volume = {109},
 year = {2016}
}