C-AD Accelerator R&D Division

High-current, high-brightness R&D Energy Recovery Linac (ERL)

The R&D ERL is headed by Ilan Ben-Zvi.

• Various documents on ERL specific subjects
• Internal link only: ERL wiki

ERL Information

Information on this state-of-the art R&D ERL can be found in a few places on this site. This ERL is constructed with support from the Department of Defense (DOD), Joint Technology Office (JTO), the Office of Naval Research (ONR) and the Department of Energy's (DOE) Division of Nuclear Physics.

Among the unique features of this ERL developed by our group, one may note the following:

• Very high current (up to 0.5 amperes CW).
• Very low emittance, below 3 microns (RMS normalized) at 1.4 nC per bunch.
• Multi-alkaline and diamond amplified photocathodes.
• Superconducting, high-current RF gun.
• ERL beam merger, based on the Z-bend design.
• High-current, stable 703.75 MHz 5-cell superconducting ERL cavity.

The ERL is in an advanced construction phase, and is expected to begin commissioning in 2012.

For a 3-D view of the ERL design, click here: JPG file, 1.8 MB

3-D view of the superconducting SRF gun under construction for the ERL.   Enlarge Image

The 5-cell cavity and some of the ERL ring magnets.

Drawing shows the various components of the ERL

The ERL Control Room

The SRF gun in the ERL vault. Sergey Belomestnykh, head of the SRF Group stands besides the gun

The copper model of the new BNL3 SRF 5-cell 704 MHz cavity under bead-pull tests. Persons in the photo (left to right) are Puneet Jain, Wencan Xu and Harald Hahn.

The photocathode laser

The SRF facility, showing (left to right) the clean room for cavity assembly, the two Vertical Test Facilities, the liquid helium refrigerator and the ERL.