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Table 1 Incident electron energy partition of different materials, and the empirical formula for the best SEE and thickness of the material

From: The Design of the Emission Layer for Electron Multipliers

Incident electron energy partition

Al2O3 (eV)

MgO (eV)

Al2O3/MgO (eV)

MgO/Al2O3 (eV)

Low

[0, 250]

[0, 500]

[0, 500]

[0, 300]

Medium

[250, 500]

[500, 1000]

[500, 1000]

[500, 1000]

High

[500, 1500]

[1000, 1500]

[1000, 1500]

[500, 1500]

Best SEE formula

3.99 − 205 * ethickness/1.73

9.56 – 8.64  * ethickness/7.39

7.94 – 1.21   * ethickness/1.03

4.69 + 3.64 * ethickness/2.11

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