[PWG] Towards a high-intensity muon source

[Eugene Pasyuk]

The rotating graphite targets (wheels) were used for years at LAMPF with 1 mA of 800 MeV proton beam.

-Eugene

-
> -----Original Message-----
> From: PWG <pwg-bounces at jlab.org> On Behalf Of Jay Benesch via PWG
> Sent: Friday, March 01, 2024 09:18
> To: peppo at jlab.org; pwg at jlab.org
> Subject: [PWG] Towards a high-intensity muon source
> 
> The target discussion and capture scheme should be of interest.  The capture
> solenoid the authors arrived at is almost identical to the one we're using:
> reassuring.  The bearing wear issue on rotating graphite target is not one I
> had seen discussed prior to this.  Pavel's non-rotating target solves that so he
> may be aware of the issue.
> 
> 
> https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.27.0234
> 03
> 
> Han-Jie Cai, Yuan He, Shuhui Liu, Huan Jia, Yuanshuai Qin, Zhijun Wang,
> Fengfeng Wang, Lixia Zhao, Neng Pu, Jianwei Niu, Liangwen Chen, Zhiyu Sun,
> Hongwei Zhao, and Wenlong Zhan Phys. Rev. Accel. Beams 27, 023403 –
> Published 27 February 2024
> 
> A high-intensity muon source driven by a continuous-wave superconducting
> linac holds the potential to significantly advance the intensity frontier of
> muon sources. Alongside advancements in accelerator technologies,
> breakthroughs in muon production target and collection schemes are
> essential. After a brief introduction to the development of the accelerator-
> driven system superconducting linac, a novel muon production target is
> proposed, utilizing a free-surface liquid lithium jet capable of handling the
> heat power generated by a proton beam with an energy of 600 MeV and a
> current of 5 mA. It is predicted by our simulation studies that the lithium
> target is more efficient in surface muon production compared to the rotating
> graphite target. The parameter space of the front end consisting of a lithium
> target and a large-aperture capture solenoid is explored, from the
> perspective of production efficiency, capture efficiency, and characteristics
> of the surface muon beam.
> 
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