Strong focusing gradient in a linear active plasma lens

As part of the Snowmass'21 community planning excercise, the Advanced Accelerator Concepts (AAC) community proposed future linear colliders with center-of-mass energies up to 15 TeV and luminosities up to 50 × 1034 cm-2 s-1 in a compact footprint. In addition to being compact, these machines must also be energy efficient. We identify two challenges that must be addressed in the design of these machines. First, the Beam Delivery System (BDS) must not add significant length to the accelerator complex. Second, beam parameters must be chosen to mitigate beamstrahlung effects and maximize the luminosity-per-power of the machine. In this paper, we review advances in plasma lens technology that will help to reduce the length of the BDS system and we detail new Particle-in-Cell simulation studies that will provide insight into beamstrahlung mitigation techniques. We apply our analysis to both e + e - and γγ colliders. The challenges and solutions described in this paper are considered independently. A unified, self-consistent concept for a BDS system for a 15 TeV linear collider will be the subject of future work.

Section: Active Plasma Lensesmentioning

confidence: 99%

Beam delivery and beamstrahlung considerations for ultra-high energy linear colliders

Barklow,

Gessner,

Hogan

et al. 2023

“…On the other hand, it has been demonstrated that with a heavy gas like argon, APLs can have a uniform current distribution and thus a linearly increasing magnetic field, preserving the -17 -emittance [26,31]. The linearity of the field has been demonstrated up to a gradient of 3.6 kT/m in a capillary with diameter of 500 µm [32].…”

Section: Active Plasma Lensesmentioning

confidence: 99%

Beam delivery and final focus systems for multi-TeV advanced linear colliders

White¹,

Gessner²,

Adli³

et al. 2022

Self Cite

The Beam Delivery System (BDS) is a critical component of a high-energy linear collider. It transports the beam from the accelerator and brings it to a focus at the Interaction Point. The BDS system includes diagnostic sections for measuring the beam energy, emittance, and polarization, as well as collimators for machine protection. The length of the BDS increases with collision energy. Higher collision energies also require higher luminosities, and this is a significant constraint on the design for energy-frontier machines. Here, we review BDS designs based on traditional quadrupole magnets and examine the challenges involved in extending these to the Multi-TeV regime consistent with requirements for advanced accelerator concepts.

“…Plasma lenses: experimental results show that both active [77,78] and passive [79] plasmas lenses are gradually becoming more mature, with potential for multi-kT/m axial symmetric, linear strong focusing fields. This progress may open up new paths towards improved BDS design [1], cf.…”

Section: Selected Areas With Recent Progressmentioning

confidence: 99%

Towards a PWFA linear collider — opportunities and challenges

Adli

2022

Self Cite

I discuss some key opportunities and challenges of a PWFA collider, and outline some objectives which I consider important to be able to assess the machine performance, assuming that numerous technical challenges can be solved. The highlighted topics are purely the choices of this author. Several other articles in this issue are relevant for a collider design, and discuss challenges for different sub-systems of a collider, including the articles on the beam delivery system [1], drive-beam generation [2], and emittance preservation [3]. A more complete overview of agreed challenges and objectives can be found in international research roadmaps [4,5]. Here, we highlight in particular the option of a PWFA γγ collider.