LEA - Argonne Linac Extension Area
The Linac Extension Area (LEA) at the APS is a unique test bed for accelerator R&D, offering ~0.5 GeV electron-beam generated from different electron sources (single bunch or train) accelerated and compressed in the APS linac.
LEA capabilities include ~0.5 GeV electron beams from a photoinjector or bunch train for a thermionic source, a low-beta insertion for precision testing of small-aperture components and co-located high-power RF system and laser room.
Facility bio
Name of Facility: Linac Extension Area
Laboratory: Argonne National Laboratory
Address: 9700 S. Cass Avenue, Argonne, IL 60439
Point of Contact: Yine Sun
Facility website:
Publications list:
| Parameter | Value |
|---|---|
| Beam Type | Electrons |
| Beam Energy | main: Up to 500 MeV |
| Repetition Rate | Up to 30 Hz |
| Bunch Charge | 1 pC - 1 nC |
| Peak Current | ~1 kA |
| Beam spot size | Below 100 μm |
| Energy Spread (delta p/p) | Below 10^-3 |
Science specialists: APS/ASD has expertise in beam dynamics, advanced acceleration (w/ AWA group) and high-power RF system. It can provide support for instrumentation and controls.
Capabilities
Facility Features:
Located at the end of the APS linac
Adjacent to two high-power 2.856-GHz RF sources (50 MW and 30 MW) and a laser room (currently empty)
Beamline comprising quadrupole, spectrometer, and beam diagnostics (charge, beam distribution, position monitors)
Currently configured with a section to accommodate a “device under test” with focused beam
Beams from the APS photoinjector or thermionic electron source can be sent to LEA
EPICS-based control system → remote run possible
Facility is not regularly operated, it can be accessed to install experiment but operation must be coordinated with APS operation schedule (beam time needs to be requested during the weekly machine studies)
Additional beam time may be available in the future when fast interleaving operation between SR and LEA is implemented.
Ideal Experiment
Relativistic beam and high-power klystron
Testing of high-gradient S-band structures with beams from LEA and powered by ss-modulator driven high-power klystron, beam-wave interaction in small-aperture (THz) structures.
Bring your own structure or electron sources; example planned study of S-band version of C3 structures by SLAC.
R&D on radiation sources
Radiation source with available undulator (old APS modules) or possibly using laser-based manipulation.
Bring your own laser, undulator system.
