Muon collider is a considerable candidate of the next-generation high-energy lepton collider machine. Operating an RF cavity in a multi-Tesla magnet is a critical requirement in a muon accelerator and a cooling channel. However, the maximum RF gradient in a vacuum RF cavity is strongly limited by an external magnetic field. Dense hydrogen gas filled RF cavity has been proposed since it is functional of generating a high RF accelerating gradient in a strong magnetic field and making an ionization cooling process at the same time. A critical issue of the cavity is a beam- induced plasma that consumes a considerable amount of RF power. The gas filled RF test cell was made and measured the RF loading due to a beam-induced plasma by using an intense proton beam at Fermilab. By doping an electronegative gas in dense hydrogen, the plasma loading effect is significantly mitigated. The result shows that the cavity is functional with a muon collider beam. Recent progress is shown in this presentation.

翻译：Muon 相撞器是下一代高能 Lepton 相撞机的一个相当相当的候选设备。 在多特斯拉磁铁中操作 RF 腔是 Muon 加速器和冷却频道的关键要求。 但是, 真空RF 腔的最大RF 梯度受到外部磁场的严格限制。 提议了高氢气填充RF 洞穴, 因为它在强大的磁场中可产生高RF加速梯度, 并同时进行离子冷却过程。 电解的关键问题是, 气导等离子体消耗大量RF动力。 填充的RF 试验电池是使用在Fermilab的强烈质子束制作的, 并测量了Bam 诱变等离子产生的RF装载量。 通过将电离子在密氢中注入, 血浆加载效应显著减弱。 结果显示, 电流体与粘合器的电流体是起作用的。 最新进展见于此演示。