Neutralizing trapped electrons on the hydrogenated surface of a diamond amplifier

作者：Chang Xiangyun^*; Ben Zvi Ilan; Rao Triveni; Smedley John; Wang Erdong; Wu Qiong; Xin Tianmu

来源：Physical Review Special Topics - Accelerators and Beams, 2012, 15(1): 013501.

DOI：10.1103/PhysRevSTAB.15.013501

We discuss our investigation of electron trapping in a diamond amplifier (DA). Our previous work demonstrated that some electrons reaching the DA's hydrogenated surface are not emitted. The state and the removal of these electrons is important for DA applications. We found that these stopped electrons are trapped, and cannot be removed by a strong reversed-polarity electric field; to neutralize this surface charge, holes must be sent to the hydrogenated surface to recombine with the trapped electrons through the Shockley-Read-Hall surface-recombination mechanism. We measured the time taken for such recombination on the hydrogenated surface, viz. the recombination time, as less than 5 ns, limited by the resolution of our test system. With this measurement, we demonstrated that DA could be operated in an rf cavity with frequency of a few hundred megahertz.

• 出版日期2012-1-20
• 单位北京大学