论文标题
在SRF注射器2 Kelvin的SRF注射器运营的平面Ultranocrystalline钻石场排放源的演示
Demonstration of Planar Ultrananocrystalline Diamond Field Emission Source Operating in SRF Injector at 2 Kelvin
论文作者
论文摘要
此处报道的是在2 kelvin操作时配备了田间发射阴极的SRF Tesla 1.3 GHz枪中电子束产生的首次演示。阴极是由氮掺入的Ultranocrystalline Diamond [（n）UNCD]沉积在NB RRR300阴极插头上的亚微米膜。测量输出电流是作为腔梯度的函数呈指数增加的。我们的结果表明，通往完全低温SRF注射器技术的可行途径。一个重要的发现是，由（N）UNCD制成的电子发射极是一种长期称为高效的田间发射材料，显示出创纪录的低转交梯度为0.6 mV/m。提出了一个解释这种行为的假设。
Reported here is the first demonstration of electron beam generation in an SRF TESLA 1.3 GHz gun equipped with field emission cathode when operated at 2 Kelvin. The cathode is submicron film of nitrogen-incorporated ultrananocrystalline diamond [(N)UNCD] deposited atop a Nb RRR300 cathode plug. The output current was measured to increase exponentially as a function of the cavity gradient. Our results demonstrate a feasible path toward simplified fully cryogenic SRF injector technology. One important finding is that the electron emitter made of (N)UNCD, a material long been known as a highly efficient field emission material, demonstrated a record low turn-on gradient of 0.6 MV/m. A hypothesis explaining this behavior is proposed.
