高穩(wěn)定長(zhǎng)壽命反射式GaAs(Cs,F)光陰極
A HIGH STABLE LONG LIFE-SPAN REFLACTIVE GaAs(Cs, F) PHOTOCATHODE
-
摘要: 一個(gè)穩(wěn)定的光陰極表面層是獲得一個(gè)穩(wěn)定的長(zhǎng)壽命光陰極的必不可少的條件。由于反射式GaAs(Cs,F)光陰極用氟代替氧進(jìn)行表面激活,氟的強(qiáng)烈的電負(fù)性使得表面層的穩(wěn)定性得到改善。反射式GaAs(Cs,F)光陰極的壽命達(dá)到8500小時(shí)。除此之外,它的工藝重復(fù)性和抗污染能力也比GaAs(Cs,O2)光陰極的好。
-
關(guān)鍵詞:
Abstract: A Stable surface layer is essential for a high stable long life-span photocathode. Using fluorine instead of oxygen in activating the surface of GaAs substrate, the strong electronegativity of fluorine improved the stability of photocathode. The life-span of reflactive GaAs (Cs, F) photocathode has been up to 8500 hours. Furthermore, its technological reproducibility and anti-contamination ability are better than those of GaAs(Cs, O2) photocathode. -
H. Schade, H. Nelson and H. Kressel, Appl. Phys. Lett.,20(1972), 385.[2]H. Kressel, H. Schade and H. Nelson, J. Lumin., 7(1973),146.[3]Hirofumi Kan, et al., Appl. Phys. Lett., 9(1979), 545.[4]Hirofumi Kan, et al., J. Appl. Phys., 6(1980), 3404.[5]E. I. Garwin, et al., Oxide effects on photoemisston from high current GaAs photocathodes. SLAG Pub. 2715, March 1981.[6]B. E. Evans, et al., Surface Sci., 11(1968). 1.[7]S. Gatde, Phys. Stat. Sol. (A), 2(1970), 497.[8]I. Shita, et al., J. Electrochem. Soc., 124(1977), 155. -
計(jì)量
- 文章訪問(wèn)數(shù): 1803
- HTML全文瀏覽量: 120
- PDF下載量: 519
- 被引次數(shù): 0
下載:
