Study of irregular electron beam correcting permanent-magnet-quadrupole doublet lens for irradiation accelerator.

In this paper, a permanent-magnet-quadrupole doublet lens with strong-focusing is designed and manufactured. Such an instrument could solve the problem of irregular beam spots produced by the weak focusing of conventional solenoid-focusing systems in low-energy electron irradiation accelerators. It could provide a better and more appropriate initial beam spot before the beam enters the subsequent magnetic spreading system or magnetic scanning system, thus, improving the irradiation uniformity.

Electron Beam Etching of Cellulose Microgels for Absorptive Separation of DMSO from Reactions of 5-Hydroxymethylfurfural Synthesis.

Invited for this month's cover is the groups of Jiang Huang and Yanlong Gu at Huazhong University of Science and Technology. The image shows a new method for the separation of dimethyl sulfoxide from a reaction solution of synthesizing 5-hydroxymethylfurfural by means of using a cellulose microgel fabricated by electron beam irradiation as a bio-based absorbant. The Research Article itself is available at 10.

Electron Beam Etching of Cellulose Microgels for Absorptive Separation of DMSO from Reactions of 5-Hydroxymethylfurfural Synthesis.

In this study, an efficient method for the separation of 5-hydroxymethylfurfural by the specific adsorption of dimethyl sulfoxide (DMSO) with cellulose microgels fabricated by electron beam irradiation was developed. The cellulose microgel was recovered and reused although this was accompanied by a decrease in the separation efficiency. A series of characterizations, including ultraviolet and infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, and swelling ability tests, were performed to determine the adsorption behavior of the chemical structures of the microgel toward DMSO.