The 50 MeV beam test facility at LBL

Abstract

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Electron beam charge diagnostics for laser plasma accelerators

“…The ALS linear accelerator (linac) provided 50 MeV e-beams with a microbunch duration of ' 30 ps in full-width half-maximum (FWHM) [36], and one or two microbunches with 8 ns separation determined by the 125 MHz electron gun cathode pulser. The total charge was controlled by changing the bias voltage of the thermionic electron gun (gun bias voltage).…”

Radiation sources and diagnostics with ultrashort electron bunches

“…This type of technique will be important for the diagnosis of electron bunches of future accelerators. In Thomson scattering (TS) experiments at the Beam Test Facility (BTF) [38] at the Advanced Light Source at Lawrence Berkeley National Laboratory, 300 fs X-ray pulses have been produced by scattering 50 MeV electron beams against an ultrashort laser pulse in a 90…”

Modeling of the ALS linac

“…Subharmonic bunchers and an S-band buncher were deployed to achieve this goal. [l] Recently many interesting experiments were proposed in the Beam Test Facility [2] which uses the ALS Linac when it is not used for ALS injection. These experiments may have special requirements for beam parameters andor require a better characterization of the beam.…”