[PEPPo] [EXTERNAL] Re: [PWG] Towards a high-intensity muon source

[Bill Briscoe]

Hi Jay

There are many publications and presentations available online that
discuss the rotating graphite wheels. These are mostly from the period
when the large Meson Factories (LAMPF, TRIUMF, SIN) were being planned
and built in the 60's - 70's.

BB

William J. Briscoe, Professor Emeritus
Department of Physics
The George Washington University
Director Emeritus, GW Institute for Nuclear Studies (GWINS)
Director, Data Analysis Center (DAC)
202-994-6788 (Foggy Bottom Campus)
571-553-8340 (Virginia Science and Technology Campus)

On Fri, Mar 1, 2024 at 9:24 AM Eugene Pasyuk via PWG <pwg at jlab.org> wrote:
>
> 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://urldefense.proofpoint.com/v2/url?u=https-3A__journals.aps.org_prab_abstract_10.1103_PhysRevAccelBeams.27.0234&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=JlUFXKjU497y48k9NKRpBw&m=utBQd6-k21Fwg_58zmYQnopBRIgi_6KqbC1a2uJLUf5-pWdZ5mJjbA50qZ7S5JaR&s=bC0hbHvG68GYMvWK5euxz9j5F_r0129HFhor0tjP_k8&e= 
> > 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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