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arXiv 1406.1665physics.ins-det
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低能光子高通量VUV光束线的设计

The design of a high flux VUV beamline for low energy photons

Jiajia Wang, Mao Ye, Tan Shi, Rui Chang, Shan Qiao

摘要:

设计了一条用于上海光源ARPES测量的真空紫外光束线。为了提高分辨率和体积灵敏度,需要低至7 eV的光子能量。当光子能量低于30 eV时,p偏振光的反射率会急剧下降,因此,设计高通量的低能真空紫外光子束线是一个挑战。本文提出了一种可变光栅深度(VGD)的可变包角VLPGM,它可以在宽能量覆盖范围内实现高分辨率和高通量。

英文摘要:

A VUV beamline at SSRF for ARPES measurements are designed. To increase the resolution and bulk sensitivity, the photon energy as low as 7 eV is desired. Because the reflectivity for p-polarized photons strongly decreases when the photon energy is below 30 eV, the design of high flux beamline for low energy VUV photons is a challenge. This work shows a variable including angle VLPGM with varied grating depth (VGD) which can achieve both high resolution and high flux with broad energy coverage.

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