Update on HEPS Progress

Attosecond and nano-Coulomb electron bunches via the Zero Vector Potential mechanism

“…The transverse geometric emittance in the x-y plane is 35 ± 7 nm-rad. The transverse emittance is therefore in all planes comparable to pre-injectors for state-of-the-art nano-Coulomb electron bunch accelerators [43,46] but at a significantly higher instantaneous peak current. Intense attosecond X-ray pulses can be produced from electron bunches via bremsstrahlung from a solid target [47] or through interaction with a counter-propagating laser pulse [48].…”

“…One electron bunch with mean energy of 51 ± 11 MeV and duration of 35 as has a transverse geometric emittance of 35 ± 7 nm-rad and show three-dimensional (3D) simulation predicting an electron bunch with a charge of 9.3 nC for realistic laser parameters. As electron bunches are typically ∼ 1 nC in conventional accelerators, whose electron bunch emittance properties are ∼ mm rad before injection into a damping ring, and ∼ nm rad post-damping ring for forefront colliders [42,43], the ZVP electron bunches compare favorably with those conditioned in forefront colliders and open new methods for injection and emittance control. They are therefore ideal candidates both for direct production of bright, hard and attosecond duration coherent X-rays, and for injection into secondary accelerators such as laser or plasma wakefield accelerators.…”