title: MeV electron acceleration at 1  kHz with <10  mJ laser pulses.
abstract: We demonstrate laser-driven acceleration of electrons to MeV-scale energies at 1 kHz repetition rate using <10  mJ pulses focused on near-critical density He and H2gas jets. Using the H2gas jet, electron acceleration to ∼0.5  MeV in ∼10  fC bunches was observed with laser pulse energy as low as 1.3 mJ. Increasing the pulse energy to 10 mJ, we measure ∼1  pC charge bunches with >1  MeV energy for both He and H2gas jets.
authors.forename: F
authors.initials: F
authors.lastname: Salehi
authors.forename: A J
authors.initials: AJ
authors.lastname: Goers
authors.forename: G A
authors.initials: GA
authors.lastname: Hine
authors.forename: L
authors.initials: L
authors.lastname: Feder
authors.forename: D
authors.initials: D
authors.lastname: Kuk
authors.forename: B
authors.initials: B
authors.lastname: Miao
authors.forename: D
authors.initials: D
authors.lastname: Woodbury
authors.forename: K Y
authors.initials: KY
authors.lastname: Kim
authors.forename: H M
authors.initials: HM
authors.lastname: Milchberg