发射度

Then the corresponding sigma matrix is given to further estimate the beam emittance extracted from electron cyclotron resonance ion source.

然后给出了相应的相椭圆系数矩阵来进一步估算从ECR离子源引出束流的发射度。

The beam emittance and brightness are the important figure of merit for the beam in accelerator.

束流发射度和束流亮度是表征加速器束流品质的主要指标。

The thermal emittance was measured with solenoid scan method under the condition of very low charge for which the space charge induced emittance growth is negligible.

针对低发射度的测量问题，我们在清华大学光阴极微波电子枪实验平台上开展了一系列先进束流测量方法研究。

According to the theory of beam phase space , the projective density distributions in four dimensional and two dimensional trace space are derived for some space charge distributions often used in accelerator physics. And, the relation between beam emittance and brightness with density distributions is developed too.

针对加速器中几种常用的束流密度相空间分布形式，根据束流相空间理论，推得了它们在四维和二维径迹空间中的投影密度，并给出了束流发射度和亮度与束流密度分布的关系式，为加速器束流测量和束流诊断提供理论依据。

After introducing solenoidal focusing near the photocathode, the beam emittance growth is suppressed dramatically.

标 签 光阴极注入器发射度发射度补偿 photoinjector emittance emittance compensation

The beam emittance of the storage ring is 2.33 nm*rad, that is about one third of the existing light source of similar energy in the world.

光源储存环的束流发射度达到2.33 nm*rad，是目前世界上现有的同样能量的光源储存环的发射度的三分之一左右。

With the algorithm for searching valid spots, the rmsemittance formula programming is realized successfully. The author solved theproblem of an image data converted into void data except to the background.

作者研发了rms发射度的数值统计公式计算发射度的程序，研发了快速寻找有效光斑的算法，解决了把整幅束流图像剔除本底后快速转化为有效数据，使束流发射度的软件测量系统成为一个在线软件系统。

The final results of the yield, the energy spread and the transversal emittance of some typical RIB has been obtained.

理论与实验均表明，在目前对PF反应机制尚不能精确描述的情况下，对RIB产额的计算结果达到1～2数量级的精度；对RIB横向发射度和动量散度的计算结果相对准确

Those ions will perform stable oscillation nearby the beam orbit while their mass is larger than a critical mass. The accumulation of trapped ions nearby the beam orbit, interacting with beam, can cause the tune shift of beam, blowup of beam emittance, increase of local vacuum pressure, and can even lead to the occurrence of beam instability.

这些被俘获的离子在束流轨道附近的积累并和束流的相互作用，会引起束流振荡频率的漂移和展宽、束流发射度的增加、局部真空度的恶化等各种负效应，有时甚至会导致束流不稳定的发生，从而影响储存环的正常工作，在这种情况下采用离子清洗方法将离子清洗掉对保证储存环的长期、稳定的运行是必要的。

The measurement are affected mainly by three factors which are the RF effect, the space charge effect and the error of measurement.

在注入器出口处，电子束发射度由：热发射度、射频场效应引起的发射度增长和空间电荷效应的发射度增长三部分组成。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。